X-ray diffraction data for ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Kira Mizell
Publication_Date: 20230125
Title:

X-ray diffraction data for ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI: 10.5066/P95CIHSU

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P95CIHSU
Larger_Work_Citation:

Citation_Information:

Originator: Kira Mizell
Publication_Date: 2023
Title:

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

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P95CIHSU

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P95CIHSU

Description:

Abstract:

Ferromanganese crusts were collected via dredge from seamounts within the Tuvalu Exclusive Economic Zone in the Pacific Ocean during cruise RR1310 funded by the National Science Foundation aboard the R/V Roger Revelle in 2013. 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these ferromanganese crust samples from the Oregon State University Marine and Geology Repository where they had been archived.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 x-ray diffraction analyses. Powder x-ray diffraction data for bulk and layer fractions of the ferromanganese crusts are provided here. Location information for the sample is included in each Attribute Definition of this metadata file, as well as in the geochemical data table (Tuvalu_RR1310_FeMn_geochem_data.csv) of this multi-table data release.

Purpose:

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

Supplemental_Information:

Samples analyzed for this data release were collected on a cruise funded by National Science Foundation grant #1154070. All metadata associated with cruise RR1310 is available upon request from the Oregon State University Marine and Geology Repository (http://osu-mgr.org).
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20130722
Ending_Date: 20220906

Currentness_Reference: Date that the last process step was completed

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

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

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Nonliving Resources
Theme_Keyword: Material Resources
Theme_Keyword: Mineral Resources
Theme_Keyword: Physical/Chemical Features
Theme_Keyword: Assessments

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: dredge sampling
Theme_Keyword: X-ray diffraction
Theme_Keyword: metallic mineral resources
Theme_Keyword: marine geology

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: sediment geochemistry
Theme_Keyword: mineral resources
Theme_Keyword: chemical analysis

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme_Keyword: Global Ocean Mineral Resources
Theme_Keyword: mineralogical analysis

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:63b650e5d34e92aad3cacaf5

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: Tuvalu

Access_Constraints: None
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.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

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

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Native_Data_Set_Environment: Mac OSX 11.6.1, Microsoft Excel 16.47.1 for Mac

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

X-ray diffraction data were tested for accuracy by intermittently analyzing a powdered quartz reference sample to verify the one hundred intensity peak at 26.6 degree two-theta. When the quartz peak was in the proper position, we infer that other measured peak positions in the sample are accurate. Peak intensities are considered semiquantitative since no quantitative standards were analyzed for this dataset.

Logical_Consistency_Report: No formal logical accuracy tests were conducted.
Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

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.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

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.

Lineage:

Process_Step:

Process_Description:

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 mineralogical analyses.

Process_Date: 20160926

Process_Step:

Process_Description:

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.

Process_Date: 20170501

Process_Step:

Process_Description:

Powdered samples were backloaded and tamped into sample holders and run in a Panalytical XÕPert3 x-ray diffractometer (XRD; https://www.malvernpanalytical.com/) with CuK-alpha radiation and graphite monochromator. Measurements were taken at intervals of 0.2 degrees 2-theta between 4 degrees and 70 degrees 2-theta at 40 kilovolts and 45 milliamps.

Source_Used_Citation_Abbreviation: samples
Process_Date: 20181101

Process_Step:

Process_Description:

Results from the diffraction analyses were combined into a comma-delimited text values document (Tuvalu_RR1310_FeMn_Primary XRD_RawData.csv).

Source_Used_Citation_Abbreviation: results
Process_Date: 20220905

Process_Step:

Process_Description:

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

Process_Date: 20241211

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 3941

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.001
Longitude_Resolution: 0.001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Tuvalu_RR1310_FeMn_Primary XRD_RawData.csv
Entity_Type_Definition:

Comma-delimited file containing results from x-ray diffraction analyses of ferromanganese crusts. Location information for the samples are included in each Attribute Definition of this metadata file and not the data table. The header for each column of diffraction data is a sample name, which follows the scheme of dredge number followed by an underscore and then the sample interval type, B for bulk or L for layer, and finally the numerical millimeter range that the interval spans as counted from the surface of the sample. One sample, D20-54, has nodule instead of the bulk and layer distinction, since it was a nodule sample. The addition of an underscore and two after the primary dredge and sample numbers indicates that more than one rock was given the same Sample ID and that rock two of two was analyzed.

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: Position
Attribute_Definition:

The two-theta angle at which the x-ray diffractometer measured the X-ray diffraction of the powdered sample

Attribute_Definition_Source: instrument defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.0084
Range_Domain_Maximum: 69.9884
Attribute_Units_of_Measure: degrees
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: D04-02_B0-60
Attribute_Definition:

X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample D04-02_B0-60 is -5.648 N, 175.661 E and 2286 m water depth.