Jason D. Chaytor Nancy G. Prouty 20220811 comma-delimited text data release DOI:10.5066/P9DRU8TP Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9DRU8TP https://www.sciencebase.gov/catalog/item/6228157dd34ee0c6b38b8255 Nancy G. Prouty Jason D. Chaytor 2022 tabular digital data data release DOI:10.5066/P9DRU8TP Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/P9DRU8TP Geochemical and mineralogic analysis of selected carbonate rock samples collected from seep fields on the RB1903 and AT41 research expeditions in the U.S. Mid- and South Atlantic.Samples were collected as a fingerprint to past hydrocarbon seep activity, fluid source, and depositional environment. Analyses include: Wavelength-dispersive X-ray Fluorescence (WDXRF) major element, Inductively Coupled Optical Emission Spectroscopy/Mass Spectroscopy (ICPOES-MS) major and minor element, and x-ray diffractrometry (XRD) mineralogy. All WDXRF and ICPOES-MS samples were analyzed by the U.S. Geological Survey Minerals Resource Program Analytical Geochemistry facility via its contract laboratory, AGAT Laboratories.XRD samples were analyzed at the Woods Hole Coastal and Marine Science Center. These samples were collected as part of the Deep Sea Exploration to Advance Research on Coral/Canyon/Cold seep Habitats (DEEP SEARCH) study, a multiyear, multi-agency campaign to characterize the deep-sea ecosystems to better understand the distribution of sensitive seafloor communities to inform potential offshore energy development and other deep-sea management. Additional information about the field activities from which these data were derived is available online at: http://cmgds.marine.usgs.gov/fan_info.php?fan=2019-620-FA http://cmgds.marine.usgs.gov/fan_info.php?fan=2019-003-FA http://cmgds.marine.usgs.gov/fan_info.php?fan=2018-042-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20180821 20190427 Ground condition at time data were collected. Complete None planned -76.1907 -74.7924 35.9274 32.4938 ISO 19115 Topic Category oceans environment geoscientificInformation Data Categories for Marine Planning Habitat USGS Thesaurus Chemical analysis x-ray fluorescence rocks and deposits x-ray diffraction mass spectroscopy Marine Realms Information Bank (MRIB) keywords chemical oceanography None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Woods Hole Coastal and Marine Science Center WHCMSC USGS Metadata Identifier USGS:6228157dd34ee0c6b38b8255 Geographic Names Information System (GNIS) Atlantic Ocean None 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, Bureau of Ocean Energy Management (BOEM), and the National Oceanic and Atmospheric Administration (NOAA) as the originators 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

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Jason D Chaytor (USGS WHCMSC) Microsoft Excel for Microsoft 365 MSO The WDXRF and ICPOES-MS geochemical data have been reviewed by the USGS MRP Analytical Chemistry Quality Assurance Specialist for accuracy and precision compared to reference materials with known concentrations. XRD instrument performance is confirmed via a silicon standard and other reference materials. Data fall within expected ranges and have been checked for duplications and omissions. Dataset represents analysis of a set of subsamples from larger primary samples recovered during the field activities. Primary samples were selected for collection at a limited number of sites during dives and represent only a small portion of the exposed authigenic carbonate material. Positioning data for HOV Alvin (AT41) and ROV Jason II (RB1903) are derived from the fusion of several different sensors installed on the underwater vehicles (doppler velocity logs, gyrocompasses and inertial navigation systems) and the surface vessels (ultra-short baseline acoustic transponders and differential/augmented GPS receivers). Based on the stated accuracy of each of the sensors on the ships and vehicles, horizontal location accuracy is expected to be better than 10 m. Depth resolution based on pressure sensors installed on the underwater vehicles is 0.1 meters. Woods Hole Coastal and Marine Science Center, Sediments Laboratory 20211001 tabular digital data https://www.usgs.gov/labs/whsedlab Digital and/or Hardcopy 20211005 Date when lab analyses were completed XRD Quantitative mineralogy determined using a Rigaku Miniflex 600 benchtop x-ray diffractometer USGS MRP Analytical Chemistry Project 2021 tabular digital data https://www.usgs.gov/centers/gggsc/science/analytical-chemistry?qt-science_center_objects=0#qt-science_center_objects carbonate lab samples 20191209 Date when lab analyses were completed WDXRF Major elements as oxides by WDXRF via USGS contracted laboratory (AGAT Labs) USGS MRP Analytical Chemistry Project 2021 tabular digital data https://www.usgs.gov/centers/gggsc/science/analytical-chemistry?qt-science_center_objects=0#qt-science_center_objects Digital and/or Hardcopy 20191209 Date when lab analyses were completed ICPOES-MS Major and trace elements by ICP-OES and ICP-MS via USGS contracted laboratory (AGAT Labs) Authigenic carbonate samples were collected during HOV and ROV dives. Samples were rinsed with freshwater, allowed to dry, photographed, and stored at room temperature. 2019 Jason Chaytor U.S. Geological Survey, Northeast Region Research Geologist mailing address

384 Woods Hole Road

Woods Hole MA 02543 US 508-457-2351 jchaytor@usgs.gov Authigenic carbonate samples were cut using a diamond saw to expose fresh surfaces. Subsamples were isolated using trim saws, diamond drills and hand scribes. 2019 Jason Chaytor U.S. Geological Survey, Northeast Region Research Geologist mailing address

384 Woods Hole Road

Woods Hole MA 02543 US 508-457-2351 jchaytor@usgs.gov Unprocessed subsamples were submitted to the USGS MRP Analytical Chemistry project where they were prepared according to standard operating procedures and then analyzed by: 1. major and trace elements by ICP-OES or ICP-MS following a sodium peroxide sinter fusion; 2.essential water (loss on ignition) by gravimetric methods; 3. major element oxides by wavelength dispersive X-ray fluorescence. Results undergo two levels of data validation: (1) the contract laboratory conducts quality control with every batch of samples sent to measure accuracy and precision and (2) all sample batches sent to the laboratory contain USGS in-house reference materials submitted at a rate of 10 percent, the results returned for the reference materials are compared to expected values for each element. Values must fall within the range of acceptance and relative standard deviation (RSD) at five times the lower limits of detection for the analytical methods. The acceptable accuracy and precision (RSD) is +/- 15 percent and 15 percent respectively for the major and trace elements by ICP-OES and ICP-MS. The acceptable accuracy and precision (RSD) is +/- 5 percent and 5 percent, respectively, for the wavelength dispersive X-ray fluorescence method. Quantitative mineralogy via XRD analysis was performed using a Rigaku Miniflex 600 benchtop x-ray diffractometer utilizing a copper anode tube to generate x-rays operated at 40 kV and 15 mA. Data processing and analysis were performed using the Rigaku PDXL2 software and the Crystallography Open Database, NIST Inorganic Crystal Structure Database, and the International Centre for Diffraction Data PDF-4/Minerals database to search and match diffraction patterns, identify component mineral phases and perform whole-powder pattern fitting of high-probability candidate phases and Rietveld structure refinement. 2021 Jason Chaytor U.S. Geological Survey, Northeast Region Research Geologist mailing address

384 Woods Hole Road

Woods Hole MA 02543 US 508-457-2351 jchaytor@usgs.gov 0.0001 0.0001 Decimal degrees D_WGS_1984 D_WGS_1984 6378137.000000 298.257224 DeepSearch_AC_XRDmineralogy.csv Comma Separated Value (CSV) file containing XRD analysis data. Producer Defined Cruise ID Name of cruise on which samples were collected. The name of the cruise may contain a ship abbreviation and year (Ron Brown=RB1903 and [20XX year, month], AT41=R/V Atlantis and sequential cruise number). Producer Defined AT41 AT41=R/V Atlantis [AT] and sequential cruise number. The corresponding USGS Field Activity Number (FAN) for this sample collection is 2018-042-FA. Producer defined RB1903 NOAA Ship Ron Brown [RB] and [20XX year, month]. The corresponding USGS Field Activity Numbers (FANs) for this sample collection are 2019-003-FA and 2019-620-FA. Producer defined Vessel Name of ship on which samples were collected Producer Defined R/V Atlantis The R/V Atlantis is a research vessel owned and operated by Woods Hole Oceanographic Institution Producer defined NOAA Ship Ronald H. Brown The NOAA Ship Ronald H. Brown is a research vessel owned and operated by the National Oceanic and Atmospheric Administration (NOAA) Producer defined Site Formal or informal site name where samples were collected Producer Defined Names of sites Date Collected Date [MM/DD/YYY] Producer Defined 8/21/2018 4/28/2019 Sample ID Unique cruise sample ID based on cruise ID (for example, RB1903 or AT41), submersible (J2=JASON II, A=Alvin), dive number (for example, 1133 or 4967), sample storage location (for example, B5=biobox 5, RB=rear biobox), and sample number (for example, R1 with R=rock, 1=first rock collected). Producer Defined Unique cruise sample ID Depth Meters below sea level Producer Defined 235 2587 meters Lat Latitude of sample location Producer Defined 32.4938 35.9274 decimal degrees Long Longitude of sample location Producer Defined -76.1907 -74.7924 Decimal degrees Split ID U.S. Geological Survey (USGS) Woods Hole Coastal and Marine Science Center (WHCMSC) subsample ID based on the field activity number (for example, 18042), unique cruise sample ID (for example, A4967-R2), analysis type (for example, G=geochemistry or X=XRD) and sequential number of subsamples analyzed Producer Defined Unique laboratory subsample IDs Sample Type Portion of the sample being analyzed (bulk=groundmass with some cement, cement=clean separated cement) Producer Defined bulk groundmass with some cement Producer defined cement clean separated cement Producer defined Quartz Quartz measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement Producer Defined 3.00 23.45 Weight percent (equiv.) 0.01 Aragonite Aragonite measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 36.65 97.0 Weight percent (equiv.) 0.01 Calcite Quartz measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 1.21 15.10 Weight percent (equiv.) 0.01 High-Mg Calcite High-Mg calcite measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 2.40 10.10 Weight percent (equiv.) 0.01 Dolomite Dolomite measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.55 94.1 Weight percent (equiv.) 0.01 Plagioclase Feldspar Plagioclase feldspar measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.40 16.00 Weight percent (equiv.) 0.01 Potassium Feldspar Potassium feldspar measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined -9999 -9999 Weight percent (equiv.) 0.01 Mica (Muscovite/Biotite) Mica (undifferentiated) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.80 4.40 Weight percent (equiv.) 0.01 Illite Illite (clay) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 1.10 1.25 Weight percent (equiv.) 0.01 Chlorite Group Chlorite group (clay) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.41 5.55 Weight percent (equiv.) 0.01 Kaolinite Kaolinite (clay) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.55 1.30 Weight percent (equiv.) 0.01 Smectite/Mont. Smectite clays (inc. montmorillonite) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.99 1.35 Weight percent (equiv.) 0.01 Pyroxenes/Titanite Pyroxene (undifferentiated) or titanite measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.30 10.13 Weight percent (equiv.) 0.01 Amphiboles Amphiboles (undifferentiated) measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.17 1.39 Weight percent (equiv.) 0.01 Rutile Rutie measured by X-ray diffractometry and whole powder pattern fitting-Rietveld structure refinement. A value of -9999 indicates the phase was not identified. Producer Defined 0.39 2.45 Weight percent (equiv.) 0.01 DeepSearch_AC_ICPMS-OES.csv Comma Separated Value (CSV) file containing ICPMS-OES analysis results. Measurement resolution reflects the lower limit of detection for each element. Producer Defined Cruise ID Name of cruise on which samples were collected. The name of the cruise may contain a ship abbreviation and year (Ron Brown=RB1903 and [20XX year, month], AT41=R/V Atlantis and sequential cruise number). Producer Defined AT41 AT41=R/V Atlantis [AT] and sequential cruise number. The corresponding USGS Field Activity Number (FAN) for this sample collection is 2018-042-FA. Producer defined RB1903 NOAA Ship Ron Brown [RB] and [20XX year, month]. The corresponding USGS Field Activity Numbers (FANs) for this sample collection are 2019-003-FA and 2019-620-FA. Producer defined Vessel Name of ship on which samples were collected Producer Defined R/V Atlantis The R/V Atlantis is a research vessel owned and operated by Woods Hole Oceanographic Institution Producer defined NOAA Ship Ronald H. Brown The NOAA Ship Ronald H. Brown is a research vessel owned and operated by the National Oceanic and Atmospheric Administration (NOAA) Producer defined Site Formal or informal site name where samples were collected Producer Defined List of site names Date Collected Date [MM/DD/YYY] Producer Defined 8/21/2018 4/24/2019 Sample ID Unique cruise sample ID based on cruise ID (for example, RB1903 or AT41), submersible (J2=JASON II, A=Alvin), dive number (for example, 1133, 4967), sample storage location (for example, B5=biobox 5, RB=rear biobox), and sample number (for example, R1 with R=rock, 1=first rock collected). Producer Defined Unique cruise sample ID Depth Meters below sea level Producer Defined 235 2169 Meters Lat Latitude of sample location Producer Defined 32.4948 35.9274 Decimal degrees Long Longitude of sample location Producer Defined -76.1897 -74.7924 Decimal degrees Split ID U.S. Geological Survey (USGS) Woods Hole Coastal and Marine Science Center (WHCMSC) subsample ID based on the field activity number (for example, 18042), unique cruise sample ID (for example, A4967-R2), analysis type (for example G=geochemistry) and sequential number of subsamples analyzed Producer Defined Unique laboratory sub-sample ID Lab No. Unique sample identification assigned by USGS analytical chemistry laboratory information management system (LIMS) Producer Defined Unique sample identification assigned by analytical laboratory Al_pct_ICPOES Aluminum, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 1.16 2.51 Weight percent 0.01 Ca_pct_ICPOES Calcium, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 18.6 31.1 Weight Percent 0.01 Fe_pct_ICPOES Iron, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 0.52 1.22 Weight percent 0.01 K_pct_ICPOES Potassium, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 0.46 0.91 Weight percent 0.01 Mg_pct_ICPOES Magnesium, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 0.28 0.93 Weight percent 0.01 P_pct_ICPOES Phosphorus, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 0.03 0.05 Weight percent 0.01 S_pct_ICPOES Sulfur, in weight percent, by inductively coupled plasma-optical emission. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.1 0.3 Weight percent 0.1 Si_pct_ICPOES Silicon, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 4.21 18.9 Weight percent 0.01 Ti_pct_ICPOES Titanium, in weight percent, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 0.07 0.22 Weight percent 0.01 Ag_ppm_ICPMS Silver, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <1 2 Parts per million 1 As_ppm_ICPMS Arsenic, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 8 Parts per million 5 B_ppm_ICPMS Boron, in parts per million, by inductively coupled plasma-mass spectrometry USGS MRP Analytical Chemistry 25 39 Parts per million 10 Ba_ppm_ICPOES Barium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 79.7 213.0 Parts per million 0.5 Be_ppm_ICPOES Beryllium, in parts per million by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 <5 Parts per million 5 Bi_ppm_ICPMS Bismuth, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.2 0.1 Parts per million 0.1 Cd_ppm_ICPMS Cadmium, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.2 0.2 Parts per million 0.2 Ce_ppm_ICPMS Cerium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 14.2 30.1 Parts per million 0.1 Co_ppm_ICPMS Cobalt, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 2.0 6.0 Parts per million 0.5 Cr_ppm_ICPOES Chromium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 13 30 Parts per million 10 Cs_ppm_ICPMS Cesium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.4 1.3 Parts per million 0.1 Cu_ppm_ICPOES Copper, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 12 Parts per million 5 Dy_ppm_ICPMS Dysprosium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.95 2.48 Parts per million 0.05 Er_ppm_ICPMS Erbium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.51 1.47 Parts per million 0.05 Eu_ppm_ICPMS Europium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.27 0.57 Parts per million 0.05 Ga_ppm_ICPMS Gallium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 2.81 6.31 Parts per million 0.01 Gd_ppm_ICPMS Gadolinium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 1.18 2.73 Parts per million 0.05 Ge_ppm_ICPMS Germanium, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <1 1 Parts per million 1 Hf_ppm_ICPMS Hafnium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 1 9 Parts per million 1 Ho_ppm_ICPMS Holmium, in parts per million, by inductively coupled plasma-mass spectrometry USGS MRP Analytical Chemistry 0.17 0.5 Parts per million 0.05 In_ppm_ICPMS Indium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry <0.2 <0.2 Parts per million 0.2 La_ppm_ICPMS Lanthanum, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 7.2 14.7 Parts per million 0.1 Li_ppm_ICPOES Lithium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry <10 12 Parts per million 10 Lu_ppm_ICPMS Lutetium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.07 0.23 Parts per million 0.05 Mn_ppm_ICPOES Manganese, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry <10 131 Parts per million 10 Mo_ppm_ICPMS Molybdenum, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry <2 2 Parts per million 2 Nb_ppm_ICPMS Niobium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 1.5 5.7 Parts per million 0.1 Nd_ppm_ICPMS Neodymium, in parts per million, by inductively coupled plasma-mass spectrometry USGS MRP Analytical Chemistry 6.8 14.5 Parts per million 0.1 Ni_ppm_ICPOES Nickel, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 5 16 Parts per million 5 Pb_ppm_ICPMS Lead, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 11 Parts per million 5 Pr_ppm_ICPMS Praseodymium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 1.75 3.75 Parts per million 0.05 Rb_ppm_ICPMS Rubidium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 16.9 34.5 Parts per million 0.2 Sb_ppm_ICPMS Antimony, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.1 0.1 Parts per million 0.1 Sc_ppm_ICPOES Scandium, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 <5 Parts per million 5 Se_ppm_ICPMS Selenium, in parts per million, by inductively coupled plasma-mass spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 <5 Parts per million 5 Sm_ppm_ICPMS Samarium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 1.3 2.9 Parts per million 0.1 Sn_ppm_ICPMS Tin, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <1 2 Parts per million 1 Sr_ppm_ICPOES Strontium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 3590 7490 Parts per million 1 Ta_ppm_ICPMS Tantalum, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.5 <0.5 Parts per million 0.5 Tb_ppm_ICPMS Terbium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.16 0.41 Parts per million 0.05 Te_ppm_ICPMS Tellurium, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.5 <0.5 Parts per million 0.5 Th_ppm_ICPMS Thorium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 2.0 3.9 Parts per million 0.1 Tl_ppm_ICPMS Thallium, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <0.5 <0.5 Parts per million 0.5 Tm_ppm_ICPMS Thulium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.07 0.23 Parts per million 0.05 U_ppm_ICPMS Uranium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 3.42 8.92 Parts per million 0.05 V_ppm_ICPOES Vanadium, in parts per million, by inductively coupled plasma-optical emission spectrometry. USGS MRP Analytical Chemistry 16 36 Parts per million 5 W_ppm_ICPMS Tungsten, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <1 <1 Parts per million 1 Y_ppm_ICPMS Yttrium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 4.5 14.0 Parts per million 0.5 Yb_ppm_ICPMS Ytterbium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 0.5 1.6 Parts per million 0.1 Zn_ppm_ICPOES Zinc, in parts per million, by inductively coupled plasma-optical emission spectrometry. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation. USGS MRP Analytical Chemistry <5 11 Parts per million 5 Zr_ppm_ICPMS Zirconium, in parts per million, by inductively coupled plasma-mass spectrometry. USGS MRP Analytical Chemistry 41.5 331.0 Parts per million 0.5 DeepSearch_AC_WDXRFmajors.csv Comma Separated Value (CSV) file containing WDXRF analysis data. Measurement resolution reflects the lower limit of detection. Producer Defined Cruise ID Identification number of DEEPSEARCH cruise on which samples were collected. Producer Defined AT41 AT41=R/V Atlantis [AT] and sequential cruise number. The corresponding USGS Field Activity Number (FAN) for this sample collection is 2018-042-FA. Producer defined RB1903 NOAA Ship Ron Brown [RB] and [20XX year, month]. The corresponding USGS Field Activity Numbers (FANs) for this sample collection are 2019-003-FA and 2019-620-FA. Producer defined Vessel Name of ship on which samples were collected Producer Defined R/V Atlantis The R/V Atlantis is a research vessel owned and operated by Woods Hole Oceanographic Institution Producer defined NOAA Ship Ronald H. Brown The NOAA Ship Ronald H. Brown is a research vessel owned and operated by the National Oceanic and Atmospheric Administration (NOAA) Producer defined Site Formal or informal site name where samples were collected Producer Defined Text field Date Collected Date [MM/DD/YYYY] Producer Defined 8/21/2018 4/24/2019 Sample ID Unique cruise sample ID based on cruise ID (for example RB1903 or AT41), submersible (J2=JASON II, A=Alvin), dive number (for example, 1133, 4967), sample storage location (for example B5=biobox 5, RB=rear biobox), and sample number (for example, R1 with R=rock). Producer Defined Unique cruise sample ID Depth Meters below sea level Producer Defined 235 2169 Meters Lat Latitude of sample location Producer Defined 32.4948 35.9274 Decimal degrees Long Longitude of sample location Producer Defined -76.1897 -74.7924 Decimal degrees Lab No. Unique sample identification assigned by USGS MRP analytical chemistry laboratory information management system (LIMS) Producer Defined Text field Split ID WHCMSC subsample ID based on the field activity number (for example, 18042), unique cruise sample ID (for example A4967-R2), analysis type (for example, G=geochemistry or X=XRD) and sequential number of subsamples analyzed Producer Defined Unique identification number Al2O3 % Aluminum, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 2.2 4.69 Weight percent 0.01 BaO % Barium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation USGS MRP Analytical Chemistry <0.01 0.03 Weight percent 0.01 CaO % Calcium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 26.8 46.5 Weight percent 0.01 Cr2O3 % Chromium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation USGS MRP Analytical Chemistry 0 0 Fe2O3 % Total Iron, reported in ferric oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.78 1.85 Weight percent 0.01 K2O % Potassium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.49 1.08 Weight percent 0.01 LOI % Loss on Iginition (LOI), in weight percent, by gravimetric methods. USGS MRP Analytical Chemistry 22.9 38.9 Weight percent 0.01 MgO % Magnesium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.47 1.59 Weight percent 0.01 MnO % Manganese, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation USGS MRP Analytical Chemistry <0.01 0.03 Weight percent 0.01 Na2O % Sodium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.62 1.1 Weight percent 0.01 P2O5 % Phosphorus, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.06 0.12 Weight percent 0.01 SiO2 % Silicon, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 9.31 42.2 Weight percent 0.01 SrO % Strontium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.47 0.91 Weight percent 0.01 TiO2 % Titanium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. USGS MRP Analytical Chemistry 0.12 0.37 Weight percent 0.01 V2O5 % Vanadium, reported in oxide form, in weight percent, by wavelength dispersive X-ray fluorescence. A “less than” value indicates that the presence of the analyte was below the measurable amount for the instrumentation USGS MRP Analytical Chemistry <0.01 <0.01 Weight percent 0.01 The first line of the comma-delimited text file is a header line. U.S. Geological Survey U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov This dataset consists of three comma-delineated files of data (DeepSearch_AC_ICPMS-OES.csv, DeepSearch_AC_WDXRFmajors.csv, DeepSearch_AC_XRDmineralogy.csv) accompanied by one FGDC metadata file (DeepSearch_AC_geochem_xml). 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 16.53 ASCII text file none 0.15 https://www.sciencebase.gov/catalog/file/get/61576cdbd34e0df5fb9fc371 https://doi.org/10.5066/P9DRU8TP Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of geochemical data and metadata. The second link points to a landing page for the entire data release. None. These data can be viewed with any text editor software. 20220811 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 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998