Major and trace element geochemistry of ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone

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What does this data set describe?

1. How might this data set be cited?
   Mizell, Kira, 20230125, Major and trace element geochemistry of ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone: data release DOI: 10.5066/P95CIHSU, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P95CIHSU

   This is part of the following larger work.
   Mizell, Kira, 2023, Major and trace element geochemistry and mineralogy of ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone: data release DOI:10.5066/P95CIHSU, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P95CIHSU

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -176.7556
   East_Bounding_Coordinate: 172.7104
   North_Bounding_Coordinate: -3.9656
   South_Bounding_Coordinate: -13.2404
   

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 22-Jul-2013

   Ending_Date: 23-Dec-2021

   Currentness_Reference:

   Date that the last process step was completed

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: comma-delimited text
   

6. 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 (55)
   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.
      
7. How does the data set describe geographic features?

   Tuvalu_RR1310_FeMn_geochem_data.csv

   Comma-delimited file containing results from geochemical analyses of ferromanganese crusts at the latitude, longitude, and water depth of each sample location. (Source: Producer defined)

   Sample_ID

   The sample and dredge ID for each sample (Source: Originally defined onboard ship during the cruise by cruise participants. For several samples, IDs were updated by USGS.) The sample names include the dredge number (D, denoting dredge, followed by a number) and a further underscored number to denote the sample number. The addition of a two in parenthesis indicates that more than one rock was given the same Sample ID and that rock two of two was analyzed. For one sample, D28-01, an L followed by a number and a stratigraphic location was added to explain specific layers that were analyzed.

   Latitude

   Latitude at which sample was collected (Source: producer defined)

   Range of values
   Minimum:	-11.451
   Maximum:	-5.648
   Units:	decimal degrees
   Resolution:	0.001

   Longitude

   Longitude at which sample was collected (Source: producer defined)

   Range of values
   Minimum:	-179.803
   Maximum:	-179.875
   Units:	decimal degrees
   Resolution:	0.001

   Water_Depth

   Water depth in meters at which the sample was collected (Source: producer defined)

   Range of values
   Minimum:	2286
   Maximum:	4110
   Units:	meters (m)
   Resolution:	1

   Genetic_Type

   The genetic type for each mineral sample (Source: Producer defined)

   Value	Definition
   hydrogenetic	the sample or subsample is a hydrogenetic ferromangense crust, which means the mineral was precipitated predominantly from seawater
   hydrothermal	the sample or subsample is a hydrothermally mineralized sample and hydrothermal fluid contributed to sample formation

   Bulk_Layer

   Defines whether the sample analyzed was a bulk sample, a discrete layer sample, or a spherical nodule sample (Source: Producer defined)

   Value	Definition
   B	this is a bulk sample
   L	this is a layer sample
   nodule	this is a spherical nodule sample

   sample_depth_interval

   The depth interval, measured in millimeters from the top of the stratigraphic section, that encompasses each rock layer sample (Source: Producer defined) Sample and layer subsample intervals are listed as ranges of integer values that represent the depth in millimeters below the surface of the crust. Samples with NA listed do not have a morphology that allows for an interval to be measured and defined.

   Fe

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

   Range of values
   Minimum:	6500
   Maximum:	268000
   Units:	parts per million
   Resolution:	100

   Mn

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

   Range of values
   Minimum:	87900
   Maximum:	313600
   Units:	parts per million
   Resolution:	100

   Si

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

   Range of values
   Minimum:	4200
   Maximum:	146900
   Units:	parts per million
   Resolution:	100

   Al

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

   Range of values
   Minimum:	3000
   Maximum:	52700
   Units:	parts per million
   Resolution:	100

   Mg

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

   Range of values
   Minimum:	9900
   Maximum:	18600
   Units:	parts per million
   Resolution:	100

   Ca

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

   Range of values
   Minimum:	20200
   Maximum:	213700
   Units:	parts per million
   Resolution:	100

   Na

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

   Range of values
   Minimum:	3800
   Maximum:	22900
   Units:	parts per million
   Resolution:	100

   K

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

   Range of values
   Minimum:	3100
   Maximum:	25300
   Units:	parts per million
   Resolution:	100

   Ti

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

   Range of values
   Minimum:	300
   Maximum:	21700
   Units:	parts per million
   Resolution:	100

   P

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

   Range of values
   Minimum:	300
   Maximum:	11600
   Units:	parts per million
   Resolution:	100

   S

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

   Range of values
   Minimum:	500
   Maximum:	2900
   Units:	parts per million
   Resolution:	100

   CO2

   carbon dioxide concentration in each sample (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	2700
   Maximum:	227400
   Units:	parts per million
   Resolution:	100

   LOI

   Loss on ignition when heated to 1000 C for each sample (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	263000
   Maximum:	4585000
   Units:	parts per million
   Resolution:	100

   H2OM

   Quantity of H2O-, or sorbed water, in each sample (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	50000
   Maximum:	266000
   Units:	parts per million
   Resolution:	1000

   H2OP

   Quantity of H2O+, or structural water, in each sample (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	47000
   Maximum:	253000
   Units:	parts per million
   Resolution:	1000

   Ag

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

   Range of values
   Minimum:	0.02
   Maximum:	1.33
   Units:	parts per million
   Resolution:	0.01

   As

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

   Range of values
   Minimum:	9.5
   Maximum:	307.9
   Units:	parts per million
   Resolution:	0.1

   Ba

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

   Range of values
   Minimum:	405
   Maximum:	2073
   Units:	parts per million
   Resolution:	1

   Be

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

   Range of values
   Minimum:	0.2
   Maximum:	8.2
   Units:	parts per million
   Resolution:	0.1

   Bi

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

   Range of values
   Minimum:	0.2
   Maximum:	43.3
   Units:	parts per million
   Resolution:	0.1

   Cd

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

   Range of values
   Minimum:	2.0
   Maximum:	19.9
   Units:	parts per million
   Resolution:	0.1

   Cl

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

   Range of values
   Minimum:	574
   Maximum:	12768
   Units:	parts per million
   Resolution:	1

   Co

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

   Range of values
   Minimum:	46
   Maximum:	12808
   Units:	parts per million
   Resolution:	1

   Cr

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

   Range of values
   Minimum:	1.1
   Maximum:	107.9
   Units:	parts per million
   Resolution:	0.1

   Cu

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

   Range of values
   Minimum:	554
   Maximum:	2881
   Units:	parts per million
   Resolution:	1

   F

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

   Range of values
   Minimum:	148
   Maximum:	3438
   Units:	parts per million
   Resolution:	1

   Hf

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

   Range of values
   Minimum:	0.4
   Maximum:	15.2
   Units:	parts per million
   Resolution:	0.1

   Hg

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

   Range of values
   Minimum:	0.004
   Maximum:	1.020
   Units:	parts per million
   Resolution:	0.001

   In

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

   Range of values
   Minimum:	0.02
   Maximum:	0.68
   Units:	parts per million
   Resolution:	0.01

   Li

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

   Range of values
   Minimum:	1.3
   Maximum:	402.7
   Units:	parts per million
   Resolution:	0.1

   Mo

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

   Range of values
   Minimum:	138
   Maximum:	631
   Units:	parts per million
   Resolution:	1

   Nb

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

   Range of values
   Minimum:	2.1
   Maximum:	124.5
   Units:	parts per million
   Resolution:	0.1

   Ni

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

   Range of values
   Minimum:	1571
   Maximum:	7554
   Units:	parts per million
   Resolution:	1

   Pb

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

   Range of values
   Minimum:	21
   Maximum:	1546
   Units:	parts per million
   Resolution:	1

   Rb

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

   Range of values
   Minimum:	2.3
   Maximum:	41.2
   Units:	parts per million
   Resolution:	0.1

   Sb

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

   Range of values
   Minimum:	30
   Maximum:	89
   Units:	parts per million
   Resolution:	1

   Sc

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

   Range of values
   Minimum:	2.0
   Maximum:	18.3
   Units:	parts per million
   Resolution:	0.1

   Se

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

   Range of values
   Minimum:	0.3
   Maximum:	6.7
   Units:	parts per million
   Resolution:	0.1

   Sn

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

   Range of values
   Minimum:	0.9
   Maximum:	55.9
   Units:	parts per million
   Resolution:	0.1

   Sr

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

   Range of values
   Minimum:	702
   Maximum:	1741
   Units:	parts per million
   Resolution:	1

   Ta

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

   Range of values
   Minimum:	0.04
   Maximum:	4.18
   Units:	parts per million
   Resolution:	0.01

   Te

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

   Range of values
   Minimum:	1.1
   Maximum:	158.2
   Units:	parts per million
   Resolution:	0.1

   Th

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

   Range of values
   Minimum:	0.2
   Maximum:	16.7
   Units:	parts per million
   Resolution:	0.1

   Tl

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

   Range of values
   Minimum:	45
   Maximum:	292
   Units:	parts per million
   Resolution:	1

   U

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

   Range of values
   Minimum:	2.8
   Maximum:	15.3
   Units:	parts per million
   Resolution:	0.1

   V

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

   Range of values
   Minimum:	168
   Maximum:	862
   Units:	parts per million
   Resolution:	1

   W

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

   Range of values
   Minimum:	24
   Maximum:	112
   Units:	parts per million
   Resolution:	1

   Zn

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

   Range of values
   Minimum:	395
   Maximum:	1223
   Units:	parts per million
   Resolution:	1

   Zr

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

   Range of values
   Minimum:	19
   Maximum:	906
   Units:	parts per million
   Resolution:	1

   La

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

   Range of values
   Minimum:	11.9
   Maximum:	338.1
   Units:	parts per million
   Resolution:	0.1

   Ce

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

   Range of values
   Minimum:	8.0
   Maximum:	1302.4
   Units:	parts per million
   Resolution:	0.1

   Pr

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

   Range of values
   Minimum:	2.0
   Maximum:	63.5
   Units:	parts per million
   Resolution:	0.1

   Nd

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

   Range of values
   Minimum:	9.4
   Maximum:	269.4
   Units:	parts per million
   Resolution:	0.1

   Sm

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

   Range of values
   Minimum:	2.0
   Maximum:	56.1
   Units:	parts per million
   Resolution:	0.1

   Eu

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

   Range of values
   Minimum:	0.57
   Maximum:	13.67
   Units:	parts per million
   Resolution:	0.01

   Gd

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

   Range of values
   Minimum:	2.8
   Maximum:	62.2
   Units:	parts per million
   Resolution:	0.1

   Tb

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

   Range of values
   Minimum:	0.41
   Maximum:	9.39
   Units:	parts per million
   Resolution:	0.01

   Dy

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

   Range of values
   Minimum:	2.9
   Maximum:	58.0
   Units:	parts per million
   Resolution:	0.1

   Y

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

   Range of values
   Minimum:	18.4
   Maximum:	300.0
   Units:	parts per million
   Resolution:	0.1

   Ho

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

   Range of values
   Minimum:	0.71
   Maximum:	12.31
   Units:	parts per million
   Resolution:	0.01

   Er

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

   Range of values
   Minimum:	1.9
   Maximum:	35.3
   Units:	parts per million
   Resolution:	0.1

   Tm

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

   Range of values
   Minimum:	0.28
   Maximum:	5.01
   Units:	parts per million
   Resolution:	0.01

   Yb

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

   Range of values
   Minimum:	1.8
   Maximum:	32.0
   Units:	parts per million
   Resolution:	0.1

   Lu

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

   Range of values
   Minimum:	0.31
   Maximum:	5.11
   Units:	parts per million
   Resolution:	0.01

   SUM_REY

   Summation of 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 (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	63
   Maximum:	2375
   Units:	parts per million
   Resolution:	1

   Percent_HREY

   Percentage of the heavy rare earth elements calculated by taking the sum of heavy rare earth elements (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and Y and dividing by the total_REY for each sample. (Source: standard reporting value in geochemistry)

   Range of values
   Minimum:	15.5
   Maximum:	47.5
   Units:	percent
   Resolution:	0.1

   Au

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

   Range of values
   Minimum:	0.017
   Maximum:	0.101
   Units:	parts per million
   Resolution:	0.001

   Ir

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

   Range of values
   Minimum:	0.006
   Maximum:	0.012
   Units:	parts per million
   Resolution:	0.001

   Os

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

   Range of values
   Minimum:	0.002
   Maximum:	0.008
   Units:	parts per million
   Resolution:	0.001

   Pd

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

   Range of values
   Minimum:	0.003
   Maximum:	0.009
   Units:	parts per million
   Resolution:	0.001

   Pt

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

   Range of values
   Minimum:	0.109
   Maximum:	0.800
   Units:	parts per million
   Resolution:	0.001

   Rh

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

   Range of values
   Minimum:	0.010
   Maximum:	0.040
   Units:	parts per million
   Resolution:	0.001

   Ru

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

   Range of values
   Minimum:	0.010
   Maximum:	0.032
   Units:	parts per million
   Resolution:	0.001

   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) Numerical value provided by the analyzer in parts per million

   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 (Source: Producer defined) Numerical value provided by the analyzer in parts per million

   CO2_Detection

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

   LOI_Detection

   The detection limit for loss on ignition based on the measurement method and instrumentation (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 (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 (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) Numerical value provided by the analyzer in parts per million

   As_Detection

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

   Ba_Detection

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

   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) Numerical value provided by the analyzer in parts per million

   Cd_Detection

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

   Cl_Detection

   The detection limit for chlorine concentration based on the measurement method and instrumentation (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) Numerical value provided by the analyzer in parts per million

   Cr_Detection

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

   Cu_Detection

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

   F_Detection

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

   Hg_Detection

   The detection limit for mercury concentration based on the measurement method and instrumentation (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) Numerical value provided by the analyzer in parts per million

   Li_Detection

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

   Mo_Detection

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

   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) Numerical value provided by the analyzer in parts per million

   Pb_Detection

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

   Rb_Detection

   The detection limit for rubidium concentration based on the measurement method and instrumentation (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) Numerical value provided by the analyzer in parts per million

   Sc_Detection

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

   Se_Detection

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

   Sn_Detection

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

   Sr_Detection

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

   Ta_Detection

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

   Te_Detection

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

   Th_Detection

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

   Tl_Detection

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

   U_Detection

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

   V_Detection

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

   W_Detection

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

   Zn_Detection

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

   Zr_Detection

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

   La_Detection

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

   Ce_Detection

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

   Pr_Detection

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

   Nd_Detection

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

   Sm_Detection

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

   Eu_Detection

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

   Gd_Detection

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

   Tb_Detection

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

   Dy_Detection

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

   Y_Detection

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

   Ho_Detection

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

   Er_Detection

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

   Tm_Detection

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

   Yb_Detection

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

   Lu_Detection

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

   Au_Detection

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

   Ir_Detection

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

   Os_Detection

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

   Pd_Detection

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

   Pt_Detection

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

   Rh_Detection

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

   Ru_Detection

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

   Fe_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Mn_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Si_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Al_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Mg_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Ca_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Na_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   K_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   Ti_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   P_method

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

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   S_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   CO2_method

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

   Value	Definition
   coulometry	coulometry by SGS Minerals analytical labs

   LOI_method

   An alphanumeric code that denotes the method and instrumentation used to measure loss on ignition (Source: Producer defined)

   Value	Definition
   XRF_BF_1	X-Ray Fluorescence (XRF) on borate fused disks by SGS Minerals analytical labs

   H2OM_method

   An alphanumeric code that denotes the method and instrumentation used to measure H2O-, or sorbed water, concentration (Source: Producer defined)

   Value	Definition
   gravimetric	gravimetric analysis by SGS Minerals analytical labs

   H2OP_method

   An alphanumeric code that denotes the method and instrumentation used to measure H2O+, or structural water, concentration (Source: Producer defined)

   Value	Definition
   penfield_infrared	penfield-infrared analysis by SGS Minerals analytical labs

   Ag_method

   An alphanumeric code that denotes the method and instrumentation used to measure silver 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 by SGS Minerals analytical labs

   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 by SGS Minerals analytical labs

   Ba_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   Be_method

   An alphanumeric code that denotes the method and instrumentation used to measure beryllium 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 by SGS Minerals analytical labs

   Bi_method

   An alphanumeric code that denotes the method and instrumentation used to measure bismuth 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 by SGS Minerals analytical labs

   Cd_method

   An alphanumeric code that denotes the method and instrumentation used to measure cadmium 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 by SGS Minerals analytical labs

   Cl_method

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

   Value	Definition
   ion-selective electrode	ion-selective electrode by SGS Minerals analytical labs

   Co_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Cr_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   Cu_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   F_method

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

   Value	Definition
   ion-selective electrode	ion-selective electrode by SGS Minerals analytical labs

   Hf_method

   An alphanumeric code that denotes the method and instrumentation used to measure hafnium 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 by SGS Minerals analytical labs

   Hg_method

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

   Value	Definition
   CVAA	cold vapor atomic absorption spectroscopy (CVAA) by SGS Minerals analytical labs

   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 by SGS Minerals analytical labs

   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_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   Mo_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Nb_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Ni_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Pb_method

   An alphanumeric code that denotes the method and instrumentation used to measure lead 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 by SGS Minerals analytical labs

   Rb_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Sb_method

   An alphanumeric code that denotes the method and instrumentation used to measure antimony 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 by SGS Minerals analytical labs

   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 by SGS Minerals analytical labs

   Se_method

   An alphanumeric code that denotes the method and instrumentation used to measure selenium 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 by SGS Minerals analytical labs

   Sn_method

   An alphanumeric code that denotes the method and instrumentation used to measure tin 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 by SGS Minerals analytical labs

   Sr_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   Ta_method

   An alphanumeric code that denotes the method and instrumentation used to measure tantalum 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 by SGS Minerals analytical labs

   Te_method

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

   Value	Definition
   AAS_hydride_generation	hydride generation and graphite furnace Atomic-Absorption Spectrometry (AAS) by SGS Minerals analytical labs

   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 by SGS Minerals analytical labs

   Tl_method

   An alphanumeric code that denotes the method and instrumentation used to measure thallium 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 by SGS Minerals analytical labs

   U_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   V_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   W_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Zn_method

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

   Value	Definition
   ICP_AES_4ACID	Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest of hydrochloric, hydrofluoric, nitric, perchloric acids by SGS Minerals analytical labs

   Zr_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   La_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Ce_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Pr_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Nd_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Sm_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Eu_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Gd_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Tb_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Dy_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Y_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Ho_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Er_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Tm_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Yb_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Lu_method

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

   Value	Definition
   ICP_MS_HNO3_LiMB	Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks by SGS Minerals analytical labs

   Au_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Ir_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Os_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Pd_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Pt_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Rh_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   Ru_method

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

   Value	Definition
   ICP_MS_NiS_fire_assay	fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Intertek analytical labs

   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?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Kira Mizell
2. Who also contributed to the data set?
3. 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?

How was the data set created?

1. From what previous works were the data drawn?

   geochemistry (source 1 of 2)

   Laboratory, SGS Minerals, 2017, Geochemical Element Analysis.

   Online Links:

   • https://www.sgs.ca/en/mining/analytical-services/geochemistry

   Type_of_Source_Media: geochemical analyses
   Source_Contribution:

   Fe, Mn, Si, Al, Ca, Mg, K, Na, P, Ti, and LOI were determined by X-Ray Fluorescence (XRF) on borate fused disks; Co, Mo, Nb, Ni, Rb, U, V, W, Zr, and Rare Earth Elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and Y (REY) were determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using lithium-metaborate fused disks; Ag, As, Be, Bi, Cd, Cs, Hf, In, Pb, Sb, Sc, Se, Sn, Ta, Th, Tl were determined by ICP-MS and Ba, Cr, Cu, Li, S, Sr and Zn by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) following a four-acid digest (hydrochloric, hydrofluoric, nitric, perchloric acids); Te was determined by hydride generation and graphite furnace Atomic-Absorption Spectrometry (AAS); Hg by cold vapor atomic absorption spectroscopy (CVAA); H2O- by gravimetric analysis, H2O+ by penfield-infrared; Cl and F by ion-selective electrode; carbon dioxide by coulometry.

   PGE data (source 2 of 2)

   Intertek, 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 determined by fire assay nickel sulfide collection and Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

2. How were the data generated, processed, and modified?

   Date: 26-Sep-2016 (process 1 of 5)

   USGS scientists requested these ferromanganese crust samples from the Oregon State University Marine and Geology Repository where they had been archived. Ferromanganese crust samples were sent to USGS for subsampling and major and trace element geochemical analyses.

   Date: 01-May-2017 (process 2 of 5)

   At USGS, 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. Powdered samples were then sent by USGS to commercial analytical labs, SGS and Intertek. See Source Citations for information on geochemical techniques.

   Date: 01-Nov-2018 (process 3 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: 01-Aug-2019 (process 4 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 (Tuvalu_RR1310_FeMn_geochem_data.csv). Data sources used in this process:

   • geochemistry

   Date: 11-Dec-2024 (process 5 of 5)

   The Distributor section of the metadata was edited to be the contact information for ScienceBase. No data were changed. (mau@usgs.gov)

3. What similar or related data should the user be aware of?

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

1. How well have the observations been checked?
   All geochemistry data were calibrated against certified reference materials. 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 and the value -7777 indicates that the measurement for an analyte was above the detection limit. Values of -9999 indicate that no analysis was performed.
2. 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.
3. How accurate are the heights or depths?
   The singular value for water depth for each sample was calculated from shipboard dredge log records to account for ship-based depth soundings, the length of dredge wire out, movement by the ship, approximate seamount slope, and multiple bites of the dredge along each dredge track in order to maximize location accuracy. A formal accuracy assessment of the vertical positional information in the dataset has not been conducted.
4. 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 analyses were performed on representative samples only. Users are advised to read the rest of the metadata record carefully for additional details.
5. 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?

1. 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
2. What's the catalog number I need to order this data set? These data are available in .csv format contained in a single file.
3. 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.
4. 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: 0.11533
     Network links:	https://www.sciencebase.gov/catalog/file/get/63b6512ed34e92aad3cacaf8 https://www.sciencebase.gov/catalog/item/63b6512ed34e92aad3cacaf8 https://doi.org/10.5066/P95CIHSU

   • Cost to order the data: None.

5. 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: 11-Dec-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)