Carbon isotopes 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:
Carbon isotopes data for rock samples from Von Damm vent field, Mid-Cayman Rise
Abstract:
This portion of the data release presents stable carbon isotopes 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).
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, 20241120, Carbon isotopes 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 (14)
    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?
    VonDamm_carbonisotopes_rawdata.csv
    Comma-delimited file containing results from inorganic carbon isotopic analyses of rock samples. (Source: Producer defined)
    Sample_name
    The name of the subsample analyzed (Source: producer defined) The sample names include a dive number (ROV, denoting remotely operated vehicle, followed by a number) and rock number (R, denoting rock, followed by a number) and the nature of the subasample.
    Receipt
    The NOSAMS assigned identification number (Source: NOSAMS)
    Range of values
    Minimum:171305
    Maximum:171318
    Units:counts
    Resolution:1
    Date_reported
    The date the sample was sent for analysis (Source: producer defined)
    Range of values
    Minimum:3/24/21
    Maximum:3/31/21
    Units:days
    Resolution:1
    Accession
    NOSAMS assigned identification number (Source: NOSAMS) The sample numbers begin with OS followed by a number
    F_modern
    The fraction modern, calculated by NOSAMS and corrected to a mass independent blank and a secondary mass balance correction (Source: producer defined)
    Range of values
    Minimum:0.0276
    Maximum:0.8854
    Units:counts
    Resolution:0.0001
    Fm_err
    Error obtained from repeat measurements of the same sample (Source: producer defined)
    Range of values
    Minimum:0.0011
    Maximum:0.0030
    Units:counts
    Resolution:0.0001
    Age
    Calculated by NOSAMS as Age = -8033 ln (Fm) (Source: producer defined)
    Range of values
    Minimum:980
    Maximum:28800
    Units:years
    Resolution:10
    Age_Err
    Error obtained from repeat measurements from the same sample (Source: producer defined)
    Range of values
    Minimum:15
    Maximum:320
    Units:years
    Resolution:5
    d13C
    As reported by NOSAMS, the ratio between carbon 13 and carbon 12 compared to the ratio between carbon 13 and carbon 12 measured in a standard multiplied by 1000 (Source: producer defined)
    Range of values
    Minimum:0.83
    Maximum:4.16
    Units:per mille
    Resolution:0.01
    D14C
    As reported by NOSAMS, this is the relative difference between the absolute international standard (base year 1950) and sample activity corrected for age and d13C. The value is further corrected to account for decay that took place between the collection of the sample and the time of sample measurement. (Source: producer defined)
    Range of values
    Minimum:-972.65
    Maximum:-122.11
    Units:per mille
    Resolution:0.01
    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
  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 analyzed for total inorganic carbon (TIC) at PCMSC. Samples with sufficient TIC were sent to the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility, Woods Hole, Massachusetts, for carbon isotope analyses. 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 inorganic carbon isotope analyses were combined into a comma-delimited text values document (VonDamm_carbonisotopes_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?
    Carbon isotopes were tested for accuracy by analyzing an oxalic acid standard (NBS Oxalic Acid I, NIST-SRM-4990).
  2. How accurate are the geographic locations?
    The horizontal accuracy for each sample was obtained from the ROV's Ultra Short Baseline Positioning System (USBL) navigation after calibration to the CASIUS (Calibration of Attitude Sensors In USBL Systems) calibration system. Accuracy for this depth is approximately 10- 20 m.
  3. How accurate are the heights or depths?
    The vertical accuracy was determined using multiple DVLs (Doppler Velocity Loggers) on the ROV, which are accurate to less than 1 m.
  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_carbonisotopes_metadata.faq.html>
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