Katlin Bowman Adamczyk Amy Gartman Jaycee Favela Jacob Tidwell 20250317 comma-delimited text data release DOI:10.5066/P13B46QX Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P13B46QX https://www.sciencebase.gov/catalog/item/670045e9d34e80be174aeaa4 Katlin Bowman Adamczyk Amy Gartman Jaycee Favela Jacob Tidwell 2025 data release DOI:10.5066/P13B46QX Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey Suggested Citation: Adamczyk, K., Gartman, A., Favela, J., and Tidwell, J., 2025, Computed tomography (CT) scans, photographs, geochemistry, grain-size and total carbon analysis, X-ray fluorescence (XRF) scans, X-ray diffraction (XRD), magnetic susceptibility, and gamma-ray bulk density data of gravity cores and push cores from the Escanaba Trough (Gorda Ridge): U.S. Geological Survey data release, https://doi.org/10.5066/P13B46QX. https://doi.org/10.5066/P13B46QX https://www.sciencebase.gov/catalog/item/67004442d34e80be174aea95 This portion of the data release presents Multi-Sensor Core Logger (MSCL) gamma-ray density and magnetic susceptibility of push cores and gravity core sections collected from the Escanaba Trough vent field, Gorda Ridge, in the northeast Pacific Ocean. These data were collected in 2022 (USGS Field Activity 2022-621-FA). Data were collected from 18 gravity core sections and 34 push cores at 1 cm resolution. Data are provided in comma-delimited files (.csv). Data were obtained to characterize downcore geochemical properties of sediments. These data are intended for science researchers, students, policy makers, and the general public. Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-621-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20220801 20220808 Time data were compiled to completion of the last process step Complete None planned -127.5362 -127.4076 41.1632 40.6957 ISO 19115 Topic Category oceans geoscientificInformation Data Categories for Marine Planning Nonliving Resources Mineral Resources USGS Thesaurus push coring gravity coring marine geology core analysis None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:670045e9d34e80be174aeaa4 Geographic Names Information System (GNIS) Pacific Ocean NGA GEOnet Names Server (GNS) Escanaba Trough Gorda Ridge No 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. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov https://www.sciencebase.gov/catalog/file/get/670045e9d34e80be174aeaa4?name=GC08.JPG&allowOpen=true Line plots of gamma density and magnetic susceptibility verses sediment core depth. JPEG Exploring the Seafloor and Oceanic Footprints is an interagency effort involving the National Oceanic and Atmospheric Administration, the U.S. Geological Survey, and the Bureau of Ocean Energy Management. Funding is acknowledged from NOAA Ocean Exploration via its Ocean Exploration Fiscal Year 2019 Funding Opportunity and through the National Oceanographic Partnership Program (NOPP), from the USGS Coastal and Marine Hazards and Resources Enhanced Funding Opportunities, and from the Bureau of Ocean Energy Management through Interagency Agreement M19PG00021 with the United States Geological Survey. Windows 11 Enterprise, Microsoft Excel 365 for enterprise, Geotek MSCL 7.9 Measurements less than or equal to 0 or missing data values were the result of air voids at the logging location; these voids are common at the top and bottom of cores. Anomalous values for gamma-ray bulk density and magnetic susceptibility were not excluded from the data. Core depths are not corrected for sediment compaction and are relative to the surface of the sediment. No formal attribute accuracy tests were conducted. No formal logical accuracy tests were conducted. 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. The locations of push core samples were determined using ROV Jason’s ultra-short baseline (USBL) navigation. Accuracy for this depth is approximately 6-26 m. The locations of gravity core samples were determined using the R/V Thomas G. Thompson’s GPS navigation, which is accurate to less than 5 m. A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. For push core samples, the vertical accuracy was determined with ROV Jason’s altimeter, which is accurate to less than 1 m. For gravity core samples, the vertical accuracy was determined with the R/V Thomas G. Thompson’s multibeam bathymetry system. No formal positional accuracy tests were conducted. Adamczyk, Katlin Gartman, Amy Favela, Jaycee Tidwell, Jacob 2025 comma-delimited text online U.S. Geological Survey https://www.sciencebase.gov/catalog/item/679282a3d34e88f5864c49e9 U.S. Geological Survey data release 20220524 20220613 ground condition at time samples were collected TN403_CoreLocations Latitude, longitude, and water depth information for gravity cores and push cores from this same data release Push core and gravity core samples were collected on the R/V Thomas G. Thompson between May 24, 2022, and June 13, 2022, during the TN403 Escanaba Trough expedition, which was led and staffed by USGS employees. Push cores were pushed into sediment at 37 locations by ROV Jason’s manipulator arm in water depths between 3201 and 3301 meters. Gravity cores were collected using a gravity corer at 7 locations in water depths between 3209 and 3304 meters. Gravity cores greater than 60 cm in length were cut into sections onboard the ship and labeled ‘X’ (0-60 cm), ‘Y’ (60-120 cm), and ‘Z’ (>120 cm). All cores were stored upright and refrigerated until return to shore. 20220613 Whole sediment cores were logged with a Geotek Multi Sensor Core Logger (MSCL) at 1-cm intervals for gamma-ray density and magnetic susceptibility. Gamma-ray density calibration was conducted before logging with a six-step aluminum standard and water enclosed in the same core liner as samples. Magnetic susceptibility calibration was conducted before logging with a stable iron oxide standard. Data presented are calibrated. 20220808 Katlin Adamczyk USGS Physical Scientist mailing and physical

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Santa Cruz CA 95060 831-460-7420 kadamczyk@usgs.gov Point Point 54 .0001 .0001 Decimal Degrees WGS_1984 WGS_1984 6378137.0 298.257223563 GC01-X.csv, GC01-Y.csv, GC01-Z.csv, GC03-X.csv, GC03-Y.csv, GC03-Z.csv, GC04-X.csv, GC04-Y.csv, GC04-Z.csv, GC05-Z.csv, GC06-X.csv, GC06-Y.csv, GC06-Z.csv, GC08-X.csv, GC08-Y.csv, GC08-Z.csv, GC09-Y.csv, GC09-Z.csv, J2-1418-PC03.csv, J2-1418-PC04.csv, J2-1418-PC06.csv, J2-1418-PC08.csv, J2-1418-PC12.csv, J2-1418-PC15.csv, J2-1419-PC01.csv, J2-1419-PC02.csv, J2-1419-PC05.csv, J2-1419-PC11.csv, J2-1419-PC14.csv, J2-1420-PC01.csv, J2-1420-PC02.csv, J2-1420-PC05.csv, J2-1420-PC08.csv, J2-1420-PC11.csv, J2-1420-PC14.csv, J2-1421-PC01.csv, J2-1421-PC02.csv, J2-1421-PC05.csv, J2-1422-PC01.csv, J2-1422-PC04.csv, J2-1422-PC07.csv, J2-1422-PC10.csv, J2-1422-PC13.csv, J2-1424-PC01.csv, J2-1424-PC04.csv, J2-1424-PC07.csv, J2-1424-PC10.csv, J2-1424-PC13.csv, J2-1425-PC01.csv, J2-1426-PC01.csv, J2-1426-PC04.csv, J2-1426-PC07.csv, J2-1426-PC10.csv, J2-1426-PC13.csv Comma-separated value (CSV) files containing gamma-density and magnetic susceptibility data. The first row is a header row. The file name corresponds to the core id. TN403_CoreLocations contains the latitude, longitude, and water depth for each core id. The ranges listed in the following attributes represent the combined range domains for all files. producer defined core_depth Measured depth below top of core liner producer defined 0.0 197.0 centimeters .1 gamma_density Measured gamma-ray density. Values of -9999 indicate that the gamma density measurements are not available. producer defined -0.431200 2.859100 grams per cc .000001 magnetic_susceptibility Measured magnetic susceptibility. Values of -9999 indicate that the magnetic susceptibility measurements are not available. producer defined -0.974400 509.020200 *10^-5 SI units .000001 U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov These data are available in .csv format contained in 54 individual files. 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. comma-delimited text Microscoft Excel 16.16.17 for Mac No compression applied 0.0674 https://www.sciencebase.gov/catalog/file/get/670045e9d34e80be174aeaa4 https://www.sciencebase.gov/catalog/item/670045e9d34e80be174aeaa4 https://doi.org/10.5066/P13B46QX Data and metadata can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to a landing page with metadata and data. The third link points to the landing page for the entire data release. None. 20250317 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998