X-ray diffraction data for rock samples from Von Damm vent field, Mid-Cayman Rise

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Frequently anticipated questions:

What does this data set describe?

Title:
X-ray diffraction data for rock samples from Von Damm vent field, Mid-Cayman Rise
Abstract:
This portion of the data release presents X-ray diffractograms of rock samples collected from Von Damm vent field, Mid-Cayman Rise, in the Caribbean Sea. These data were collected in 2020 (USGS Field Activity 2020-602-FA). Location information for the sample is included in each Attribute Definition of this metadata file.
Supplemental_Information:
Funding for this research is acknowledged from the U.S. Geological Survey Coastal and Marine Hazards and Resources Program, through the U.S. Geological Survey Pacific Coastal and Marine Science Center.
Additional information about the USGS field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-602-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Gartman, Amy, and Payan, Denise, 20241120, X-ray diffraction data for rock samples from Von Damm vent field, Mid-Cayman Rise: data release DOI: 10.5066/P14NQIHF, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Gartman, Amy, and Payan, Denise, 2024, Major, minor and trace elements, carbon isotopes, Raman spectra and X-ray diffractograms, and from Von Damm vent field, Mid-Cayman Rise: data release DOI:10.5066/P14NQIHF, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Gartman, A., Payan, D., 2024, Major, minor and trace elements, carbon isotopes, Raman spectra, and X-ray diffractograms from Von Damm vent field, Mid-Cayman Rise: U.S. Geological Survey data release, https://doi.org/10.5066/P14NQIHF.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -81.735
    East_Bounding_Coordinate: -81.089
    North_Bounding_Coordinate: 18.83
    South_Bounding_Coordinate: 17.747
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 14-Jan-2020
    Ending_Date: 25-Jul-2024
    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 (3823)
    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 0.0000001. Longitudes are given to the nearest 0.0000001. 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?
    VonDamm_XRD_rawdata.csv
    Comma-delimited file containing results from x-ray diffraction analyses of rock samples. Location information for the samples are included in each Attribute Definition of this metadata file. The header for each column of diffraction data is a sample name, which follows the scheme of ROV number followed by an underscore and then the sample number followed by an underscore and either "bulk" to indicate bulk or a sequential lettering of the subsample. (Source: Producer defined)
    Position(Cu2theta)
    The two-theta angle at which the x-ray diffractometer measured the X-ray diffraction of the powdered sample (Source: instrument defined)
    Range of values
    Minimum:5.0084
    Maximum:69.9824
    Units:degrees
    Resolution:0.0001
    J2-1235-R1-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1235-R1 is 18.3747419 N, 81.7974419 W and 2375 m water depth. (Source: producer defined)
    Range of values
    Minimum:30.3502
    Maximum:638.3296
    Units:counts
    Resolution:0.0001
    J2-1238-R1-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1238-R1-bulk is 18.3751322 N, 81.7971963 W and 2388 m water depth. (Source: producer defined)
    Range of values
    Minimum:33.8794
    Maximum:846.0889
    Units:counts
    Resolution:0.0001
    J2-1238-R2-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1238-R2-bulk is 18.3751316 N, 81.7971962 W and 2388 m water depth. (Source: producer defined)
    Range of values
    Minimum:26.5644
    Maximum:588.3523
    Units:counts
    Resolution:0.0001
    J2-1238-R3-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1238-R3-bulk is 18.3751316 N, 81.7971962 W and 2388 m water depth. (Source: producer defined)
    Range of values
    Minimum:20.6416
    Maximum:1433.7265
    Units:counts
    Resolution:0.0001
    J2-1238-R4-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1238-R4-bulk is 18.3751019 N, 81.797178 W and 2388 m water depth. (Source: producer defined)
    Range of values
    Minimum:32.4306
    Maximum:741.3978
    Units:counts
    Resolution:0.0001
    J2-1243-R1-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1243-R1-bulk is 18.3762974 N, 81.7980902 W and 2372 m water depth. (Source: producer defined)
    Range of values
    Minimum:31.1088
    Maximum:747.3478
    Units:counts
    Resolution:0.0001
    J2-1243-R2-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1243-R2-bulk is 18.3763037 N, 81.7980821 W and 2372 m water depth. (Source: producer defined)
    Range of values
    Minimum:27.6598
    Maximum:652.8533
    Units:counts
    Resolution:0.0001
    J2-1243-R3-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1243-R3-bulk is 18.376385 N, 81.7980426 W and 2371 m water depth. (Source: producer defined)
    Range of values
    Minimum:19.3388
    Maximum:1244.0451
    Units:counts
    Resolution:0.0001
    J2-1243-R4-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1243-R4-bulk is 18.3763264 N, 81.7976777 W and 2360 m water depth. (Source: producer defined)
    Range of values
    Minimum:41.5789
    Maximum:4514.6673
    Units:counts
    Resolution:0.0001
    J2-1244-R1-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1244-R1-bulk is 18.3751702 N, 81.797199 E and 2387 m water depth. (Source: producer defined)
    Range of values
    Minimum:45.6235
    Maximum:1133.6267
    Units:counts
    Resolution:0.0001
    J2-1244-R2-bulk
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample J2-1244-R2-bulk is 18.3751706 N, 81.7972092 E and 2387 m water depth. (Source: producer defined)
    Range of values
    Minimum:44.1848
    Maximum:1134.6785
    Units:counts
    Resolution:0.0001
    J2-1243-R3_btm
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. (Source: producer defined)
    Range of values
    Minimum:45.4887
    Maximum:787.8245
    Units:counts
    Resolution:0.0001
    J2-1238-R1vesicles
    X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. (Source: producer defined)
    Range of values
    Minimum:35.8810
    Maximum:893.0670
    Units:counts
    Resolution:0.0001
    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)
    • Amy Gartman
    • Denise Payan
  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?

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

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 14-Jan-2020 (process 1 of 4)
    Samples are rocks and were collected by the ROV's manipulator arm. Once recovered shipboard photographed and returned to shore. Amy Gartman attended 2020-602-FA, cruise name AT42-22.
    Date: 01-Aug-2020 (process 2 of 4)
    At USGS, bulk samples and subsamples were collected from relevant regions of the rocks. Data sources produced in this process:
    • samples
    Date: 01-Sep-2020 (process 3 of 4)
    Powdered samples were backloaded and tamped into sample holders and run in a Panalytical X'Pert3 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. Data sources used in this process:
    • samples
    Data sources produced in this process:
    • results
    Date: 25-Jul-2024 (process 4 of 4)
    Results from the diffraction analyses were combined into a comma-delimited text values document (VonDamm_XRD_rawdata.csv). Data sources used in this process:
    • results
  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?
    X-ray diffraction data were tested for accuracy by 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.
  2. How accurate are the geographic locations?
    Vertical_Positional_Accuracy The vertical accuracy was determined using multiple DVLs (Doppler Velocity Loggers) on the ROV, which are accurate to less than 1 m.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    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.
  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?

Are there legal restrictions on access or use of the data?
Access_Constraints No access constraints
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.
  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?
  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: 20-Nov-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_P14NQIHF/VonDamm_XRD_metadata.faq.html>
Generated by mp version 2.9.51 on Fri Nov 22 11:55:24 2024