Water normalized geochemistry data for marine ferromanganese crusts and phosphorite minerals in the Southern California Borderland

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What does this data set describe?

Title:

Water normalized geochemistry data for marine ferromanganese crusts and phosphorite minerals in the Southern California Borderland

Abstract:

Ferromanganese crust and phosphorite minerals were collected using remotely operated vehicles in the Southern California Borderland during two separate research cruises – NOAA Ocean Exploration Trust cruise NA124 onboard the E/V Nautilus in 2020, and Schmidt Ocean Institute cruise FK210726 onboard the R/V Falkor in 2021. Ferromanganese crust and phosphorite samples were described and subsampled for geochemical analysis at the USGS Pacific Coastal and Marine Science Center. Geochemical analyses were completed by outside commercial laboratories, and the results were provided to the USGS. Geochemical data, bulk and layer thickness information, as well as location information (latitude, longitude, depth) for each sample are provided here. The geochemical Borderland work was funded by the Pacific Coastal and Marine Science Center and ship time was funded by NOAA Office of Ocean Exploration and Research (grant number NA19OAR110305).

Supplemental_Information:

Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-641-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-637-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

How might this data set be cited?
Adamczyk, Katlin Bowman, and Mizell, Kira, 20241008, Water normalized geochemistry data for marine ferromanganese crusts and phosphorite minerals in the Southern California Borderland: data release doi:10.5066/P1QURTBR, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.
Online Links:
- https://doi.org/10.5066/P1QURTBR
Other_Citation_Details:
Suggested Citation: Adamczyk, K.B. and Mizell, K., 2024, Water normalized geochemistry data for marine ferromanganese crusts and phosphorite minerals in the Southern California Borderland: U.S. Geological Survey data release, https://doi.org/10.5066/P1QURTBR.
What geographic area does the data set cover?
West_Bounding_Coordinate: -121.0064
East_Bounding_Coordinate: -117.4769
North_Bounding_Coordinate: 33.1496
South_Bounding_Coordinate: 31.8964
What does it look like?
Does the data set describe conditions during a particular time period?

Beginning_Date: 27-Oct-2020

Ending_Date: 06-Aug-2021

Currentness_Reference:

ground condition at time data were collected
What is the general form of this data set?
Geospatial_Data_Presentation_Form: comma-delimited text
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a Point data set. It contains the following vector data types (SDTS terminology):
  - Point (65)
2. What coordinate system is used to represent geographic features?
  Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
  The ellipsoid used is WGS_1984.
  The semi-major axis of the ellipsoid used is 6378137.0.
  The flattening of the ellipsoid used is 1/298.257222101.

How does the data set describe geographic features?

SCABorderland.csv

table containing results from geochemical analyses of marine mineral samples at the latitude, longitude, and water depth of each sample location. (Source: Producer defined)

Cruise_ID

Lists the alphanumeric cruise identifier for the expedition during which the sample was collected (Source: Producer defined)

Value	Definition
NA124	Cruise identifier for the NOAA Ocean Exploration Trust cruise NA124 onboard the E/V Nautilus in 2020
FK210726	Cruise identifier for the Schmidt Ocean Institute cruise FK210726 onboard the R/V Falkor in 2021

Sample_ID

The sample ID for each sample (Source: Producer defined) Sample IDs from the NA124 cruise are formatted as Dive#-Rock# (e.g., H1840-R3 is rock sample 3 from dive H1840). Sample IDs from the FK210726 cruise are formatted as Dive#_Rock#_SCB_Sample#_descriptor. Descriptors include bulk, bulk_fresh, bulk_outer, outer, inner, and L1 (outer crust layer), L2 (middle crust layer), and L3 (inner crust layer).

Sample_Type

Description of sample material (Source: Producer defined)

Value	Definition
phosphorite	marine derived phosphorite rock composed primarily of carbonate fluorapatite
bulk crust	the bulk, or entire stratigraphic section, of a marine ferromanganese rock composed of poorly crystalline iron and manganese oxides
crust layer	a single layer from the stratigraphic section of a marine ferromanganese rock composed of poorly crystalline iron and manganese oxides

Substrate_Type

Description of ferromanganese crust substrate (Source: Producer defined)

Value	Definition
basalt	marine basalt rock
breccia	breccia of marine rocks
carbonate	marine carbonate rock
sandstone	marine sandstone rock
crust fragment	a fragment of marine ferromanganese rock composed of poorly crystalline iron and manganese oxides
NaN	not reported
none	no apparent substrate

Thickness

The average thickness of ferromanganese crust. Values of -8888 indicate that the sample was less than 1 mm in thickness, and values of -9999 indicate that thickness measurements are not available. (Source: producer defined)

Range of values
Minimum:	1
Maximum:	75
Units:	millimeters
Resolution:	1

Latitude

Latitude at which sample was collected (Source: NA124 cruise data, FK210726 cruise data)

Range of values
Minimum:	31.8964
Maximum:	33.1496
Units:	decimal degrees
Resolution:	.0001

Longitude

Longitude at which sample was collected (Source: NA124 cruise data, FK210726 cruise data)

Range of values
Minimum:	-121.0064
Maximum:	-117.4769
Units:	decimal degrees
Resolution:	.0001

Water_Depth

Water depth in meters at which the sample was collected (Source: NA124 cruise data, FK210726 cruise data)

Range of values
Minimum:	377
Maximum:	2689
Units:	meters
Resolution:	1

Fe

Iron concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	4127
Maximum:	270761
Units:	parts per million
Resolution:	1

Mn

Manganese concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	77
Maximum:	312500
Units:	parts per million
Resolution:	1

Si

Silicon concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	5750
Maximum:	306747
Units:	parts per million
Resolution:	1

Al

Aluminum concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1270
Maximum:	63860
Units:	parts per million
Resolution:	1

Mg

Magnesium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	4644
Maximum:	20364
Units:	parts per million
Resolution:	1

Ca

Calcium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	9068
Maximum:	342341
Units:	parts per million
Resolution:	1

Na

Sodium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	11425
Maximum:	27188
Units:	parts per million
Resolution:	1

K

Potassium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1079
Maximum:	23814
Units:	parts per million
Resolution:	1

Ti

Titanium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	60
Maximum:	9575
Units:	parts per million
Resolution:	1

P

Phosphorus concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	668
Maximum:	131763
Units:	parts per million
Resolution:	1

S

Sulfur concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	201
Maximum:	11400
Units:	parts per million
Resolution:	1

H2OM

Quantity of H2O-, or sorbed water, in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	20490
Maximum:	233792
Units:	parts per million
Resolution:	1

H2OP

Quantity of H2O+, or structural water, in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	20000
Maximum:	201000
Units:	parts per million
Resolution:	1000

Ag

Silver concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry.)

Range of values
Minimum:	.1
Maximum:	2.1
Units:	parts per million
Resolution:	.1

As

Arsenic concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	8
Maximum:	450
Units:	parts per million
Resolution:	1

Ba

Barium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	92
Maximum:	41825
Units:	parts per million
Resolution:	1

Be

Beryllium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.21
Maximum:	5.80
Units:	parts per million
Resolution:	.01

Bi

Bismuth concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.02
Maximum:	25.57
Units:	parts per million
Resolution:	.01

Cd

Cadmium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.5
Maximum:	26.3
Units:	parts per million
Resolution:	.1

Cl

Chlorine concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	800
Maximum:	2300
Units:	parts per million
Resolution:	100

Co

Cobalt concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.4
Maximum:	6796.4
Units:	parts per million
Resolution:	.1

Cr

Chromium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	14
Maximum:	253
Units:	parts per million
Resolution:	1

Cs

Caesium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.1
Maximum:	2.6
Units:	parts per million
Resolution:	.1

Cu

Copper concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	8
Maximum:	1559
Units:	parts per million
Resolution:	1

F

Fluorine concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.4
Maximum:	26400.0
Units:	parts per million
Resolution:	.1

Ga

Gallium concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.63
Maximum:	3.23
Units:	parts per million
Resolution:	.01

Ge

Germanium concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.22
Maximum:	.32
Units:	parts per million
Resolution:	.01

Hf

Hafnium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.4
Maximum:	5.3
Units:	parts per million
Resolution:	.1

Hg

Mercury concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.005
Maximum:	.504
Units:	parts per million
Resolution:	.001

In

Indium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.006
Maximum:	.215
Units:	parts per million
Resolution:	.001

Li

Lithium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	2
Maximum:	94
Units:	parts per million
Resolution:	1

Mo

Molybdenum concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.2
Maximum:	884.6
Units:	parts per million
Resolution:	.1

Nb

Niobium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.3
Maximum:	85.0
Units:	parts per million
Resolution:	.1

Ni

Nickel concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	16
Maximum:	7586
Units:	parts per million
Resolution:	1

Pb

Lead concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.4
Maximum:	3220.0
Units:	parts per million
Resolution:	.1

Rb

Rubidium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	4
Maximum:	94
Units:	parts per million
Resolution:	1

Re

Rhenium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.003
Maximum:	.640
Units:	parts per million
Resolution:	.001

Sb

Antimony concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.7
Maximum:	85.9
Units:	parts per million
Resolution:	.1

Sc

Scandium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1
Maximum:	12
Units:	parts per million
Resolution:	1

Se

Selenium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1
Maximum:	4
Units:	parts per million
Resolution:	1

Sn

Tin concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.2
Maximum:	6.9
Units:	parts per million
Resolution:	.1

Sr

Strontium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	389
Maximum:	3463
Units:	parts per million
Resolution:	1

Ta

Tantalum concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.04
Maximum:	.42
Units:	parts per million
Resolution:	.01

Te

Tellurium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1
Maximum:	47
Units:	parts per million
Resolution:	1

Th

Thorium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.9
Maximum:	84.4
Units:	parts per million
Resolution:	.1

Tl

Thallium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.6
Maximum:	359.7
Units:	parts per million
Resolution:	.1

U

Uranium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	2.3
Maximum:	166.0
Units:	parts per million
Resolution:	.1

V

Vanadium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	42
Maximum:	979
Units:	parts per million
Resolution:	1

W

Tungsten concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.1
Maximum:	178.3
Units:	parts per million
Resolution:	.1

Zn

Zinc concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	30
Maximum:	1057
Units:	parts per million
Resolution:	1

Zr

Zirconium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	3
Maximum:	942
Units:	parts per million
Resolution:	1

La

Lanthanum concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	11
Maximum:	377
Units:	parts per million
Resolution:	1

Ce

Cerium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	7
Maximum:	1992
Units:	parts per million
Resolution:	1

Pr

Praseodymium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.3
Maximum:	77.7
Units:	parts per million
Resolution:	.1

Nd

Neodyium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	7
Maximum:	313
Units:	parts per million
Resolution:	1

Sm

Samarium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.6
Maximum:	66.7
Units:	parts per million
Resolution:	.1

Eu

Europium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.39
Maximum:	15.11
Units:	parts per million
Resolution:	.01

Gd

Gadolinium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.60
Maximum:	65.71
Units:	parts per million
Resolution:	.01

Tb

Terbium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.25
Maximum:	10.19
Units:	parts per million
Resolution:	.01

Dy

Dysprosium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.60
Maximum:	62.30
Units:	parts per million
Resolution:	.01

Y

Yttrium content in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	15.90
Maximum:	246.71
Units:	parts per million
Resolution:	.01

Ho

Holmium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.36
Maximum:	12.47
Units:	parts per million
Resolution:	0.01

Er

Erbium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	1.07
Maximum:	34.89
Units:	parts per million
Resolution:	0.01

Tm

Thulium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.15
Maximum:	5.00
Units:	parts per million
Resolution:	.01

Yb

Ytterbium concentration in each sample. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.92
Maximum:	33.10
Units:	parts per million
Resolution:	.01

Lu

Lutetium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.14
Maximum:	5.28
Units:	parts per million
Resolution:	.01

Au

Gold concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.002
Maximum:	.023
Units:	parts per million
Resolution:	.001

Ir

Iridium concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.002
Maximum:	.026
Units:	parts per million
Resolution:	.001

Os

Osmium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry) Numerical value provided by the analyzer in parts per million

Pd

Palladium concentration in each sample. Values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.002
Maximum:	.047
Units:	parts per million
Resolution:	.001

Pt

Platinum concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.002
Maximum:	.035
Units:	parts per million
Resolution:	.001

Rh

Range of values
Minimum:	.001
Maximum:	.011
Units:	parts per million
Resolution:	.001

Ru

Ruthenium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit, and values of -9999 indicate that no analysis was performed. (Source: standard reporting value in geochemistry)

Range of values
Minimum:	.008
Maximum:	.008
Units:	parts per million
Resolution:	.001

Fe_Detection

The detection limit for iron concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Mn_Detection

The detection limit for manganese concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	10
Maximum:	100
Units:	parts per million
Resolution:	10

Si_Detection

The detection limit for silicon concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Al_Detection

The detection limit for aluminum concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Mg_Detection

The detection limit for magnesium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Ca_Detection

The detection limit for calcium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Na_Detection

The detection limit for sodium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

K_Detection

The detection limit for potassium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Ti_Detection

The detection limit for titanium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

P_Detection

The detection limit for phosphorus concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

S_Detection

The detection limit for sulfur concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

H2OM_Detection

The detection limit for H2O-, or sorbed water, concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

H2OP_Detection

The detection limit for H2O+, or structural water, concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Ag_Detection

The detection limit for silver concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.20
Units:	parts per million
Resolution:	.01

As_Detection

The detection limit for arsenic concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	10.0
Units:	parts per million
Resolution:	.1

Ba_Detection

The detection limit for barium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	2
Maximum:	3
Units:	parts per million
Resolution:	1

Be_Detection

The detection limit for beryllium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Bi_Detection

The detection limit for bismuth concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.60
Units:	parts per million
Resolution:	.01

Cd_Detection

The detection limit for cadmium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.02
Maximum:	.20
Units:	parts per million
Resolution:	.01

Cl_Detection

The detection limit for chlorine concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Co_Detection

The detection limit for cobalt concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.1
Maximum:	.6
Units:	parts per million
Resolution:	.1

Cr_Detection

The detection limit for chromium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	1
Maximum:	2
Units:	parts per million
Resolution:	1

Cs_Detection

The detection limit for cesium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	.20
Units:	parts per million
Resolution:	.01

Cu_Detection

The detection limit for copper concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	10.0
Units:	parts per million
Resolution:	.1

F_Detection

The detection limit for fluorine concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.005
Maximum:	100.000
Units:	parts per million
Resolution:	.001

Ga_Detection

The detection limit for gallium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Ge_Detection

The detection limit for germanium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Hf_Detection

The detection limit for hafnium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.1
Maximum:	.6
Units:	parts per million
Resolution:	.1

Hg_Detection

The detection limit for mercury concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

In_Detection

The detection limit for indium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.005
Maximum:	.200
Units:	parts per million
Resolution:	.001

Li_Detection

The detection limit for lithium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	8.0
Units:	parts per million
Resolution:	.1

Mo_Detection

The detection limit for molybdenum concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	.60
Units:	parts per million
Resolution:	.01

Nb_Detection

The detection limit for niobium concentration based on the measurement method and instrumentation (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Ni_Detection

The detection limit for nickel concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	20.0
Units:	parts per million
Resolution:	.1

Pb_Detection

The detection limit for lead concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.4
Maximum:	.5
Units:	parts per million
Resolution:	.1

Rb_Detection

The detection limit for rubidium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.1
Maximum:	1.0
Units:	parts per million
Resolution:	.1

Re_Detection

The detection limit for rhenium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined) Numerical value provided by the analyzer in parts per million

Sb_Detection

The detection limit for antimony concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	.8
Units:	parts per million
Resolution:	.1

Sc_Detection

The detection limit for scandium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.1
Maximum:	2.0
Units:	parts per million
Resolution:	.1

Se_Detection

The detection limit for selenium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	1
Maximum:	10
Units:	parts per million
Resolution:	1

Sn_Detection

The detection limit for tin concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	2.0
Units:	parts per million
Resolution:	.1

Sr_Detection

The detection limit for strontium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	2.0
Units:	parts per million
Resolution:	.1

Ta_Detection

The detection limit for tantalum concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.40
Units:	parts per million
Resolution:	.01

Te_Detection

The detection limit for tellurium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	4.00
Units:	parts per million
Resolution:	.01

Th_Detection

The detection limit for thorium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.60
Units:	parts per million
Resolution:	.01

Tl_Detection

The detection limit for thallium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.02
Maximum:	.40
Units:	parts per million
Resolution:	.01

U_Detection

The detection limit for uranium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

V_Detection

The detection limit for vanadium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	5
Maximum:	100
Units:	parts per million
Resolution:	1

W_Detection

The detection limit for tungsten concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.1
Maximum:	.5
Units:	parts per million
Resolution:	.1

Zn_Detection

The detection limit for zinc concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	2
Maximum:	30
Units:	parts per million
Resolution:	1

Zr_Detection

The detection limit for zirconium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.8
Maximum:	1.0
Units:	parts per million
Resolution:	.1

La_Detection

The detection limit for lanthanum concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	3.00
Units:	parts per million
Resolution:	.01

Ce_Detection

The detection limit for cerium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	3.00
Units:	parts per million
Resolution:	.01

Pr_Detection

The detection limit for praseodymium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Nd_Detection

The detection limit for neodymium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.05
Maximum:	5.00
Units:	parts per million
Resolution:	.01

Sm_Detection

The detection limit for samarium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Eu_Detection

The detection limit for europium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.005
Maximum:	.300
Units:	parts per million
Resolution:	.001

Gd_Detection

The detection limit for gadolinium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Tb_Detection

The detection limit for terbium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Dy_Detection

The detection limit for dysprosium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Y_Detection

The detection limit for yttrium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.2
Maximum:	.5
Units:	parts per million
Resolution:	.1

Ho_Detection

The detection limit for holmium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.30
Units:	parts per million
Resolution:	.01

Er_Detection

The detection limit for erbium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Tm_Detection

The detection limit for thulium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.005
Maximum:	.300
Units:	parts per million
Resolution:	.001

Yb_Detection

The detection limit for ytterbium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.01
Maximum:	.50
Units:	parts per million
Resolution:	.01

Lu_Detection

The detection limit for lutetium concentration based on the measurement method and instrumentation (Source: Producer defined)

Range of values
Minimum:	.002
Maximum:	.500
Units:	parts per million
Resolution:	.001

Au_Detection

The detection limit for gold concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.002
Maximum:	.005
Units:	parts per million
Resolution:	.001

Ir_Detection

The detection limit for iridium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Os_Detection

The detection limit for osmium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Pd_Detection

The detection limit for palladium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Pt_Detection

The detection limit for platinum concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Rh_Detection

The detection limit for rhodium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Ru_Detection

The detection limit for ruthenium concentration based on the measurement method and instrumentation. Values of -9999 indicate that no analysis was performed. (Source: Producer defined)

Range of values
Minimum:	.001
Maximum:	.005
Units:	parts per million
Resolution:	.001

Fe_method

An alphanumeric code that denotes the method and instrumentation used to measure iron concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

Mn_method

An alphanumeric code that denotes the method and instrumentation used to measure manganese concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

Si_method

An alphanumeric code that denotes the method and instrumentation used to measure silicon concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

Al_method

An alphanumeric code that denotes the method and instrumentation used to measure aluminum concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Mg_method

An alphanumeric code that denotes the method and instrumentation used to measure magnesium concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Ca_method

An alphanumeric code that denotes the method and instrumentation used to measure calcium concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

Na_method

An alphanumeric code that denotes the method and instrumentation used to measure sodium concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

K_method

An alphanumeric code that denotes the method and instrumentation used to measure potassium concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Ti_method

An alphanumeric code that denotes the method and instrumentation used to measure titanium concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

P_method

An alphanumeric code that denotes the method and instrumentation used to measure phosphorus concentration (Source: Producer defined)

Value	Definition
XRF_BF	X-Ray Fluorescence (XRF) on borate fused disks

S_method

An alphanumeric code that denotes the method and instrumentation used to measure sulfur concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

H2OM_method

An alphanumeric code that denotes the method and instrumentation used to measure H2O-, or sorbed water, concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
GRAV	Gravimetric analysis - approximately 2 grams of powdered sample was heated at 105 degrees Celcius for 4 hours, then cooled in a desiccator for approximately 30 minutes before recording the final weight. Bulk crust samples from cruise NA124 were heated for 2 hours (H1841-R1, H1841-R4, H1842-R1, H1845-R2) or 24 hours (H1841-R3, H1845-R3, H1846-R6).

H2OP_method

An alphanumeric code that denotes the method and instrumentation used to measure H2O+, or structural water, concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
GRAV_IR	gravimetric and penfield IR

Ag_method

An alphanumeric code that denotes the method and instrumentation used to measure silver concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

As_method

An alphanumeric code that denotes the method and instrumentation used to measure aresenic concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
INAA	Instrumental Neutron Activation Analysis

Ba_method

An alphanumeric code that denotes the method and instrumentation used to measure barium concentration (Source: Producer defined)

Value	Definition
ICP_OES_ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Be_method

An alphanumeric code that denotes the method and instrumentation used to measure beryllium concentration (Source: Producer defined)

Value	Definition
ICP_OES_ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Bi_method

An alphanumeric code that denotes the method and instrumentation used to measure bismuth concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Cd_method

An alphanumeric code that denotes the method and instrumentation used to measure cadmium concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Cl_method

An alphanumeric code that denotes the method and instrumentation used to measure chlorine concentration (Source: Producer defined)

Value	Definition
INAA	Instrumental Neutron Activation Analysis

Co_method

An alphanumeric code that denotes the method and instrumentation used to measure cobalt concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Cr_method

An alphanumeric code that denotes the method and instrumentation used to measure choromium concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Cs_method

An alphanumeric code that denotes the method and instrumentation used to measure choromium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Cu_method

An alphanumeric code that denotes the method and instrumentation used to measure copper concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

F_method

An alphanumeric code that denotes the method and instrumentation used to measure fluorine concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ISE	Ion Selective Electrode
FUS-ISE	Lithium Borate Fusion with Ion Selective Electrode

Ga_method

An alphanumeric code that denotes the method and instrumentation used to measure gallium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Ge_method

An alphanumeric code that denotes the method and instrumentation used to measure germanium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Hf_method

An alphanumeric code that denotes the method and instrumentation used to measure hafnium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Hg_method

An alphanumeric code that denotes the method and instrumentation used to measure mercury concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
CVAAS	Cold Vapor Atomic Absorption Spectroscopy

In_method

An alphanumeric code that denotes the method and instrumentation used to measure indium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Li_method

An alphanumeric code that denotes the method and instrumentation used to measure lithium concentration based on the measurement method and instrumentation (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Mo_method

An alphanumeric code that denotes the method and instrumentation used to measure molybdenum concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Nb_method

An alphanumeric code that denotes the method and instrumentation used to measure niobium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Ni_method

An alphanumeric code that denotes the method and instrumentation used to measure nickel concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Pb_method

An alphanumeric code that denotes the method and instrumentation used to measure lead concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Rb_method

An alphanumeric code that denotes the method and instrumentation used to measure rubidium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Re_method

An alphanumeric code that denotes the method and instrumentation used to measure rubidium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Sb_method

An alphanumeric code that denotes the method and instrumentation used to measure antimony concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Sc_method

An alphanumeric code that denotes the method and instrumentation used to measure scandium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Se_method

An alphanumeric code that denotes the method and instrumentation used to measure selenium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Sn_method

An alphanumeric code that denotes the method and instrumentation used to measure tin concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Sr_method

An alphanumeric code that denotes the method and instrumentation used to measure strontium concentration (Source: Producer defined)

Value	Definition
ICP_OES_ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Ta_method

An alphanumeric code that denotes the method and instrumentation used to measure tantalum concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Te_method

An alphanumeric code that denotes the method and instrumentation used to measure tellurium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Th_method

An alphanumeric code that denotes the method and instrumentation used to measure thorium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Tl_method

An alphanumeric code that denotes the method and instrumentation used to measure thallium concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

U_method

An alphanumeric code that denotes the method and instrumentation used to measure uranium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

V_method

An alphanumeric code that denotes the method and instrumentation used to measure vanadium concentration (Source: Producer defined)

Value	Definition
XRF	X-Ray Fluorescence
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

W_method

An alphanumeric code that denotes the method and instrumentation used to measure tungsten concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Zn_method

An alphanumeric code that denotes the method and instrumentation used to measure zinc concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion
ICP-OES_4ACID	Inductively Coupled Plasma Optical Emission Spectroscopy, four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids

Zr_method

An alphanumeric code that denotes the method and instrumentation used to measure zirconium concentration (Source: Producer defined)

Value	Definition
ICP_MS_4ACID	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

La_method

An alphanumeric code that denotes the method and instrumentation used to measure lanthanum concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Ce_method

An alphanumeric code that denotes the method and instrumentation used to measure cerium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Pr_method

An alphanumeric code that denotes the method and instrumentation used to measure praseodymium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Nd_method

An alphanumeric code that denotes the method and instrumentation used to measure neodymium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Sm_method

An alphanumeric code that denotes the method and instrumentation used to measure samarium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Eu_method

An alphanumeric code that denotes the method and instrumentation used to measure europium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Gd_method

An alphanumeric code that denotes the method and instrumentation used to measure gadolinium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Tb_method

An alphanumeric code that denotes the method and instrumentation used to measure terbium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Dy_method

An alphanumeric code that denotes the method and instrumentation used to measure dysprosium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Y_method

An alphanumeric code that denotes the method and instrumentation used to measure yttrium concentration (Source: Producer defined)

Value	Definition
ICP_MS_ACID	Inductively Coupled Plasma Mass Spectrometry, low-mineralized strong acid digestion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Ho_method

An alphanumeric code that denotes the method and instrumentation used to measure holmium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Er_method

An alphanumeric code that denotes the method and instrumentation used to measure erbium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Tm_method

An alphanumeric code that denotes the method and instrumentation used to measure thulium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Yb_method

An alphanumeric code that denotes the method and instrumentation used to measure ytterbium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Lu_method

An alphanumeric code that denotes the method and instrumentation used to measure lutetium concentration (Source: Producer defined)

Value	Definition
ICP_MS_Na2O2	Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion
ICP_MS_FUS	Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion

Au_method

An alphanumeric code that denotes the method and instrumentation used to measure gold concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay
INAA	Instrumental Neutron Activation Analysis

Ir_method

An alphanumeric code that denotes the method and instrumentation used to measure iridium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Os_method

An alphanumeric code that denotes the method and instrumentation used to measure osmium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Pd_method

An alphanumeric code that denotes the method and instrumentation used to measure palladium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Pt_method

An alphanumeric code that denotes the method and instrumentation used to measure platinum concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Rh_method

An alphanumeric code that denotes the method and instrumentation used to measure rhodium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Ru_method

An alphanumeric code that denotes the method and instrumentation used to measure ruthenium concentration. Values of NaN indicate that no analysis was performed. (Source: Producer defined)

Value	Definition
ICP_MS_NiS_FA	Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay

Entity_and_Attribute_Overview: The first line of the csv file is a header line.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Katlin Bowman Adamczyk
- Kira Mizell
Who also contributed to the data set?
To whom should users address questions about the data?

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Attn: PCMSC Science Data Coordinator

2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)

pcmsc_data@usgs.gov

Why was the data set created?

These data serve to expand the knowledge and statistics for deep ocean marine mineral occurrences and composition within the US Exclusive Economic Zone and global ocean.

How was the data set created?

From what previous works were the data drawn?
NA124 cruise data (source 1 of 5)
Jensen, Paul, Levin, Lisa, and Coleman, Dwight, 2022, Event Logs from ROV Hercules Dives conducted during E/V Nautilus expedition NA124 (2020).
Online Links:
- https://www.marine-geo.org/tools/search/Files.php?data_set_uid=30986#datasets
Type_of_Source_Media: Marine Geoscience Data System
Source_Contribution: Latitude, longitude, and depth information for NA124 samples
FK210726 cruise data (source 2 of 5)
Levin, Lisa, 2021, Event Logs from ROV SuBastian Dives conducted during R/V Falkor expedition FK210726 (2021).
Online Links:
- https://www.marine-geo.org/tools/files/30410#datasets
Type_of_Source_Media: Marine Geoscience Data System
Source_Contribution: Latitude, longitude, and depth information for FK210726 samples
geochemistry (source 3 of 5)
SGS Minerals Laboratory, Lakefield, Ontario, Canada, 2021, Geochemical Element Analysis.
Online Links:
- https://www.sgs.ca/en/mining/analytical-services/geochemistry
Type_of_Source_Media: geochemical analyses
Source_Contribution:
Concentration data for the following elements was produced by SGS Minerals Laboratory for samples with Cruise_ID 'NA124' and Sample_Type 'phosphorite' - Fe, Mn, Si, Al, Mg, Ca, Na, K, Ti, P, Ag, As, Ba, Be, Bi, Cd, Co, Cr, Cs, Cu, F, Hf, In, Li, Mo, Nb, Ni, Pb, Rb, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, TI, U, V, W, Zn, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu, Au.
geochemistry (source 4 of 5)
Actlabs, Ancaster, Ontario, Canada, 2023, Geochemical Element Analysis.
Online Links:
- https://actlabs.com/geochemistry/
Type_of_Source_Media: geochemical analyses
Source_Contribution:
Concentration data for the following elements was produced by Actlabs for samples with Cruise_ID 'FK210726' and Sample_Type 'bulk crust' or 'crust layer' - Fe, Mn, Si, Al, Mg, Ca, Na, K, Ti, P, S, H2OP, Ag, As, Ba, Be, Bi, Cd, Co, Cr, Cs, Cu, Hf, Hg, In, Li, Mo, Nb, Ni, Pb, Rb, Re, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, TI, U, V, W, Zn, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu, Au, Ir, Os, Pd, Pt, Rh, Ru. Concentration data for the following elements was produced by Actlabs for samples with Cruise_ID 'NA124' and Sample_Type 'bulk crust' - Fe, Mn, Si, Al, Mg, Ca, Na, K, Ti, P, S, H2OP, Ag, As, Ba, Be, Bi, Cd, Co, Cr, Cs, Cu, Ge, Hf, Hg, In, Li, Mo, Nb, Ni, Pb, Rb, Re, Sb, Sc, Sn, Sr, Ta, Te, Th, TI, U, V, W, Zn, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu. Concentration data for the following elements was produced by Actlabs for samples with Cruise_ID 'NA124' and Sample_Type 'phosphorite' - Fe, Mn, Si, Al, Mg, Ca, Na, K, Ti, P, S, Ag, As, Ba, Be, Bi, Cd, Cl, Co, Cr, Cs, Cu, F, Ga, Hf, Hg, In, Li, Mo, Nb, Ni, Pb, Rb, Re, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, TI, U, V, W, Zn, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu.
PGE data (source 5 of 5)
Intertek, Maddington, Western Australia, 2017, Platinum Group Element Analysis.
Online Links:
- https://www.intertek.com/minerals/precious-metals-analysis/
Type_of_Source_Media: geochemical analyses
Source_Contribution:
Platinum group elements (PGE; Au, Ir, Os, Pd, Pt, Rh, Ru) were produced by Intertek for all samples.
How were the data generated, processed, and modified?
Date: 06-Aug-2021 (process 1 of 5)
USGS directed mineral sample collection using remotely operated vehicles in the Southern California Borderland during two separate research cruises – NOAA Ocean Exploration Trust cruise NA124 onboard the E/V Nautilus in 2020 and Schmidt Ocean Institute cruise FK210726 onboard the R/V Falkor in 2021. Mineral samples were air-dried after cleaned of all sediment and biological material, stored at room temperature onboard the ship, then transported to the USGS Pacific Coastal and Marine Science Center (PCMSC) for characterization. A portion of all ferromanganese crusts and phosphorites analyzed for this data release are archived in the Global Marine Mineral Resources rock collection at PCMSC, while the remainder of these mineral samples are archived with other rock types from these expeditions at The Geological Collections at Scripps Institution of Oceanography.
Date: 27-Sep-2021 (process 2 of 5)
Bulk portions or individual layers were sampled from the ferromanganese crusts using a ceramic knife and then ground using an agate mortar and pestle to approximately 75 micrometers.
Date: 02-Feb-2024 (process 3 of 5)
The water content (H2O-) of each ferromanganese crust sample was determined by gravimetric analysis, and the weight percent water was then used to correct element concentrations in each sample to sorbed-water-free values using the following formula: water normalized = [raw element concentration]/[(100 – wt.percent water)/100]. Data sources used in this process:
- geochemistry
Date: 02-Feb-2024 (process 4 of 5)
Total rare earth elements plus yttrium (Total_REY) were calculated by summing the concentration of rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Y in each sample. Percentage of the heavy rare earth elements was calculated by taking the sum of heavy rare earth elements (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) and Y and dividing the sum by the Total_REY value for each sample. Data sources used in this process:
- geochemistry
Date: 02-Feb-2024 (process 5 of 5)
Results from the lab analyses, detection limits, analytical method information, location data, and sample information were combined into a comma-delimited text values document (SCABorderland.csv). Data sources used in this process:
- NA124 cruise data
- FK210726 cruise data
- PGE data
- geochemistry
What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
Certified reference materials, including NOD-A-1 (Atlantic Ocean Mn Nodule) and NOD-P-1 (Pacific Ocean Mn Nodule), were measured for all reported elements. The average relative percent difference (RPD) between measured and certified concentrations was 10–20 percent for Cr, K, Ru, Sb, Sr, Th, and Re. Higher RPDs (>20 percent) were observed for Te, W, and Ge. Average RPDs for all other elements were <10 percent. Duplicate measurements were made for all analytical techniques except Cold Vapor Atomic Absorption Spectroscopy (CVAAS, Hg analysis). The average RPD between duplicate measurements was 10–20 percent for Cr, Nb, Sc, Ta, and Th. Higher RPDs (>20 percent) were observed for Ag, Hf, Pd, Ru, Re, Se, and Zr. Average RPDs for all other elements were <10 percent. The instruments and techniques used to generate the geochemical data are included in the data table and also summarized below in the Source Citations since data were generated by commercial laboratories. Limits for each analyte's detection by an instrument are reported in the table. The value -8888 indicates that the measurement for an analyte was below the detection limit. Values of -9999 indicate that no analysis was performed.
How accurate are the geographic locations?
A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. The horizontal accuracy was determined with the ship's GPS navigation, which is accurate to less than 5 m.
How accurate are the heights or depths?
A formal accuracy assessment of the vertical positional information in the dataset has not been conducted.
Where are the gaps in the data? What is missing?
Dataset is considered complete for the information presented, as described in the abstract. Many samples do not have chemistry data because it was done on representative samples only. Users are advised to read the rest of the metadata record carefully for additional details.
How consistent are the relationships among the observations, including topology?
No formal logical accuracy tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints	No access constraint
Use_Constraints	USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data.

Who distributes the data set? (Distributor 1 of 1)

U.S. Geological Survey - ScienceBase

Denver Federal Center, Building 810, Mail Stop 302
Denver, CO

1-888-275-8747 (voice)

sciencebase@usgs.gov
What's the catalog number I need to order this data set? These data are available in .csv format contained in a single file.
What legal disclaimers am I supposed to read?
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

How can I download or order the data?

Availability in digital form:

Data format:	File contains table in .csv format in format comma-delimited text (version Microsoft Excel 16.16.17 for Mac) Size: 0.097
Network links:	https://www.sciencebase.gov/catalog/file/get/6619c762d34e7eb9eb7dce05 https://doi.org/10.5066/P1QURTBR

Cost to order the data: None.

What hardware or software do I need in order to use the data set?
These data can be viewed with Microsoft Excel or any text reader.

Who wrote the metadata?

Dates:: Last modified: 08-Oct-2024
Metadata author:: U.S. Geological Survey, Pacific Coastal and Marine Science Center

Attn: PCMSC Science Data Coordinator

2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)

pcmsc_data@usgs.gov
Metadata standard:: Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P1QURTBR/SCABorderland_metadata_revised.faq.html>