Photographs of push cores from Loki's Castle and Favne vent fields, Mohns Ridge

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title:
Photographs of push cores from Loki's Castle and Favne vent fields, Mohns Ridge
Abstract:
This portion of the data release presents linescan images (photographs) from push cores collected from Loki's Castle and Favne vent fields, on the Mohns Ridge, in the Norwegian Sea. These data were Rcollected in 2018 and 2019 (USGS Field Activity 2018-691-DD and 2019-624-FA). Images were obtained from seventeen push cores at 50-micron (200 pixel per cm) resolution. Color images in 16-bit TIFF format are provided for each core segment, along with proprietary metadata files containing image scaling information.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-691-DD https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-624-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, 20240110, Photographs of push cores from Loki's Castle and Favne vent fields, Mohns Ridge: data release DOI:10.5066/P96D02FG, 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, Au, Manda V., and Payan, Denise, 2023, Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Fauna vent fields, Mohns Ridge: data release DOI:10.5066/P96D02FG, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Gartman, A., Au, M.V., and Payan, D., 2024, Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Favne vent fields, Mohns Ridge: U.S. Geological Survey data release, https://doi.org/10.5066/P96D02FG.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 3.8318
    East_Bounding_Coordinate: 8.1661
    North_Bounding_Coordinate: 73.5678
    South_Bounding_Coordinate: 72.7556
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 18-Jul-2018
    Ending_Date: 30-Jun-2019
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: raster digital data
  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 (17)
    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 0.00004. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is 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 1/298.257223563.
  7. How does the data set describe geographic features?
    zip files containing linescan images
    Each zip file contains 1 TIFF file and their respective software-proprietary XML files. (Source: Producer defined)
    ROV12PC02_linescan, ROV15PC01_linescan, ROV17PC01_linescan, ROV17PC02_linescan, ROV17PC03_linescan, ROV22PC01_linescan, ROV22PC02_linescan, ROV22PC03_linescan, ROV22PC04_linescan, ROV22PC05_linescan, ROV22PC07_linescan, ROV22PC08_linescan, ROV26PC01_linescan, ROV26PC02_linescan, ROV26PC03_linescan, ROV28PC01_linescan, ROV28PC02_linescan
    Folders each containing one linescan TIFF image representing each core and their respective Geotek software-proprietary XML files. The Geotek software-proprietary XML files contain the following attributes and example attribute values are provided: <geotek-image> <image-type>giTIFImage</image-type> <coreID>GS19ROV12PC02</coreID> <section-number>1</section-number> <image-number>1</image-number> <physical-width>8.12</physical-width> <physical-height>24.10</physical-height> <pixels-per-scan>5</pixels-per-scan> <pixels-per-CM>200</pixels-per-CM> <horizontal-resolution>200</horizontal-resolution> <exposure-time-ms>40</exposure-time-ms> <calibration-aperture>5.74</calibration-aperture> <image-aperture>5.74</image-aperture> <red-high-calibration>90.0</red-high-calibration> <green-high-calibration>90.0</green-high-calibration> <blue-high-calibration>90.0</blue-high-calibration> <red-low-calibration>0.0</red-low-calibration> <green-low-calibration>0.0</green-low-calibration> <blue-low-calibration>0.0</blue-low-calibration> <pixel-width>1623</pixel-width> <scan-lines>4820</scan-lines> <filename>IM001_01.tif</filename> <geotek-camera-lighting version="2" mode="visible"> <visible-lighting-data> <bank-two> <bank2cluster1>126</bank2cluster1> <bank2cluster2>126</bank2cluster2> <bank2cluster3>126</bank2cluster3> <bank2cluster4>126</bank2cluster4> <bank2cluster5>126</bank2cluster5> </bank-two> <bank-one> <bank1cluster1>126</bank1cluster1> <bank1cluster2>126</bank1cluster2> <bank1cluster3>126</bank1cluster3> <bank1cluster4>126</bank1cluster4> <bank1cluster5>126</bank1cluster5> </bank-one> </visible-lighting-data> </geotek-camera-lighting> <convg-x-red>0</convg-x-red> <convg-x-green>0</convg-x-green> <convg-x-blue>0</convg-x-blue> <convg-y-red>0</convg-y-red> <convg-y-green>4</convg-y-green> <convg-y-blue>8</convg-y-blue> <is-a-sync-scan-image>0</is-a-sync-scan-image> </geotek-image> (Source: producer defined) These Geotek software-proprietary XML files contain information on linescan image acquisition settings and image scaling. The values in the example provided may be different for each scan. Please contact the PCMSC data coordinator for more information on the contents of these XML files.

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?
    PCMSC Science Data Coordinator
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

Images were obtained to characterize sediments in push cores. These data are intended for science researchers, students, policy makers, and the general public.

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: 04-Jul-2019 (process 1 of 2)
    Samples are push cores and were pushed into sediment by the ROV’s manipulator arm. Once recovered shipboard cores were frozen (2018-691-DD) or refrigerated (2019-624-FA) until return to shore. Samples were donated from Field Activity 2018-691-DD, and no USGS attendees were present. Amy Gartman attended 2019-624-FA.
    Date: 17-May-2023 (process 2 of 2)
    Cores split into "working" and "archive" halves in the lab. Sediment surfaces were cleaned and smoothed on the "archive" halves of split cores. Cores were loaded onto the track of a Geotek Multi Sensor Core Logger (MSCL) equipped with a Geotek Geoscan-III linescan camera and Geotek Imaging 3.7 software. Prior to imaging, the camera was calibrated to a white tile and an 18% grey calibration card. Person who carried out this activity:
    Amy Gartman
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Research Oceanographer
    2885 Mission St.
    Santa Cruz, CA

    831-460-7562 (voice)
    agartman@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?
    No formal attribute accuracy tests were conducted
  2. How accurate are the geographic locations?
    The locations of samples were determined using the ROV's Ultra Short Baseline Positioning System (USBL) navigation. Accuracy for this depth is approximately 20-50 m.
  3. How accurate are the heights or depths?
    The vertical accuracy was determined with the ROV's altimeter, which is accurate to less than 1 m. No formal positional accuracy tests were 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. 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 attribute 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 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(s) of the dataset and in products derived from these data. Please see 'Distribution Info' for details.
Use_Constraints None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
  1. Who distributes the data set? (Distributor 1 of 1)
    GS ScienceBase
    U.S. Geological Survey
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? Linescan images are available in TIFF image format and provided along with FGDC-compliant metadata.
  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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 10-Jan-2024
Metadata author:
PCMSC Science Data Coordinator
U.S. Geological Survey, Pacific Coastal and Marine Science Center
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_P96D02FG/LokiFavne-linescan-metadata.faq.html>
Generated by mp version 2.9.51 on Fri Jan 12 14:31:02 2024