Isabelle M. Shapiro Jaycee Favela Katlin Bowman Adamczyk Amy Gartman 20260403 comma-delimited text data release DOI: 10.5066/P1DJPX9G Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P1DJPX9G Isabelle M. Shapiro Jaycee Favela Katlin Bowman Adamczyk Amy Gartman 2026 data release DOI: 10.5066/P1DJPX9G Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey Suggested Citation: Shapiro, I. M., Favela, J., Adamczyk, K.B., and Gartman, A., 2026, Geochemistry and x-ray diffraction data of rock samples from the Escanaba Trough (Gorda Ridge): U.S. Geological Survey data release, https://doi.org/10.5066/P1DJPX9G. https://doi.org/10.5066/P1DJPX9G This data release contains geochemical data of oxidized subsamples of rock samples collected from the Escanaba Trough vent field, Gorda Ridge, in the northeast Pacific Ocean. These data were collected in 2022 on expedition TN403 (USGS Field Activity 2022-621-FA). Samples were taken to the USGS Pacific Coastal Marine Science Center for subsampling and geochemical analyses. Data include major, minor, and trace element concentrations, location information (latitude, longitude, depth), analytical methods, and instrument detection limits where available. These data serve to expand the knowledge and statistics for deep ocean marine mineral occurrences and composition within the global ocean. 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. 20220712 20250811 Date that the last process step was completed Complete None planned -127.5392 -127.4518 41.0805 40.6987 ISO 19115 Topic Category oceans geoscientificInformation Data Categories for Marine Planning Nonliving Resources Material Resources Mineral Resources Physical/Chemical Features Assessments USGS Thesaurus chemical analysis mass spectroscopy geochemistry metallic mineral resources Marine Realms Information Bank (MRIB) keywords mineral resources chemical analysis None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program ENTERHERE CMHRP Pacific Coastal and Marine Science Center PCMSC Global Ocean Mineral Resources USGS Metadata Identifier USGS:68a50b5dd4be02198e361b67 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. These data are marked with a Creative Common CC0 1.0 Universal License. Please recognize and acknowledge the U.S. Geological Survey as the originator 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 Mac OSX 11.6.1, Microsoft Excel 16.47.1 for Mac All geochemistry data were calibrated against certified reference materials. The average relative percent different (RPD) between measured and certified concentrations was 10-20 percent for Au, W, V, Th, Tb, Bi, Y, Sb, Sn, In, Ga, Er, Dy, Eu, and Rb. Higher RPDs (>20 percent) were observed for Cr, Sm, and Yb. Average RPDs were <10 percent for Ir, Pd, Pt, Rh, Ru, Al, As, Ba, Ca, Cd, Ce, Cl, Co, Fe, Gd, Hf, Hg, Ho, K, La, Li, Mg, Mn, Mo, Nb, Nd, Ni, Pb, Pr, S, Si, Sr, Ti, Tl, U, Zn, Zr. There were no CRMs for Ru, Ag, B, Ge, Na, Sc, Se, Ta, Te, and Tm. Duplicate measurements were made for all elements except Os, Ag, Au, Be, Cl, Hf, Ir, Li, Ti, Na, Sc, Tm, Ta, and Lu. The average RPD between duplicate measurements was 10-20 percent for Y, Er, Pr, Eu, K, W, Tb, Tl, Rb, and In. Higher RPDs (>20 percent) were observed for Au, Ir, Pd, Pt, Rh, Ru, Gd, Dy, Te, Ca, Cs, Ni, Yb, Sm, Nd, and Nb. Average RPDs were <10 percent for Fe, S, Si, Th, V, Mn, Cu, Hg, Cd, Pb, Sb, Al, Zn, Co, As, Sr, B, Bi, U, Mg, Sn, Ce, Zr, Ba, Cr, Mo, La, Ho, Ga, Ge, and Se. The instruments and techniques used to generate the geochemical data are included in the data table and also summarized below in the Source Citations since data were generated by commercial laboratories. Limits for each analyte's detection by an instrument are reported in the table. The value -8888 indicates that the measurement for an analyte was below the detection limit and the value -7777 indicates that the measurement for an analyte was above the detection limit. Values of -9999 indicate that no analysis was performed. No formal logical accuracy tests were conducted. Dataset is considered complete for the information presented, as described in the abstract. Many samples do not have chemistry data because analyses were performed on representative samples only. Users are advised to read the rest of the metadata record carefully for additional details. The location of rock samples were determined using ROV Jason's ultra-short baseline (USBL) navigation. Accuracy for this depth is approximately 6-26 m. A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. Vertical accuracy was determined with ROV Jason's altimeter, which is accurate to less than 1 m. No formal positional accuracy tests were conducted. Activation Laboratories Ltd. (Actlabs), Ancaster, Ontario, Canada 2023 https://actlabs.com/geochemistry/ geochemical analyses 20230824 20231124 Date range during which official lab reports were released by Activation Labratories Ltd. (Actlabs) geochemistry Geochemical analysis of rock powders. Fe, Si, Al, Ca, Mg, K, Ti, and Li were determined by Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion (ICP_OES_Na2O2); Mn, As, B, Ba, Bi, Cd, Co, Cu, Ga, Ge, In, Nb, Ni, Rb, Pb, Sb, Sn, Sr, Se, Ta, Te, Th, Tl, U, V, W, Zn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, and Yb were determined by Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion (ICP_MS_Na2O2); Na, Ag, Cl, Cr, Hf, Mo, and Sc were determined by Instrumental Neutron Activation Analysis (INAA); Ir, Os, Pd, Pt, Rh, and Ru were determined by Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay (ICP_MS_NiS_FA); Zr was determined by Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion (ICP_MS_FUS), and Hg was determined by Cold Vapor Atomic Absorption Spectroscopy (CVAAS). Au was determined by Instrumental Neutron Activation Analysis (INAA) for most of the samples and by Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay (ICP_MS_NiS_FA) for the remaining. Intertek, Maddington, Western Australia 2024 https://www.intertek.com/minerals/precious-metals-analysis/ geochemical analyses 20240210 20240510 Date range during which official lab reports were released by Intertek PGE data Geochemical analysis of rock powders. Platinum group element concentrations (PGE; Au, Ir, Os, Pd, Pt, Rh, Ru), as well as Au concentrations for several samples, were determined by Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay (ICP_MS_NiS_FA). Rock 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. Rocks were collected from the seafloor using the ROV Jason's manipulator arm at water depths between 3192 and 3319 meters. Rock samples were frozen immediately upon recovery from the ROV, stored frozen, and shipped on ice to the USGS Pacific Coastal and Marine Science Center in Santa Cruz, CA. 20220613 In the USGS Pacific Coastal and Marine Science Center Global Seabed Mineral Resources Lab, rock samples were freeze dried, then the weathered or depositional outer later of the rock was carefully scraped off using a ceramic blade. This outer layer was then ground to a powder (approximately 75 micrometers) using a shatterbox and ceramic-lined bowls and ceramic pucks. Ceramic-lined bowls and pucks were cleaned thoroughly with quartz powder and detergents between samples to avoid cross-contamination. Powdered samples (10-50 grams) were then mailed to commercial analytical labs, Actlabs and Intertek, in individual plastic screw-top containers for geochemical analyses. See Source Citations for information on geochemical techniques. geochemistry PGE data 20230824 Total rare earth elements plus yttrium (Total_REY) were calculated by summing the concentration of rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Y in each sample. Percentage of the heavy rare earth elements was calculated by taking the sum of heavy rare earth elements (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) and Y and dividing the sum by the Total_REY value for each sample. geochemistry PGE data 20231101 Results from the lab analyses, detection limits, analytical method information, location data, and sample information were combined into a comma-delimited text values document (TN403_Rind_Geochem_data.csv). geochemistry 20250811 Katlin Adamczyk USGS Physical Scientist Mailing and Physical

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Santa Cruz CA 95060 831-460-7420 Kadamczyk@usgs.gov Point Point 11 0.0001 0.0001 Decimal degrees D_WGS_1984 WGS_1984 6378137.0 298.257223563 TN403_Rind_Geochem_data.csv Comma-delimited file containing results from geochemical analyses of rock samples at the latitude, longitude, and water depth of each sample location. The value -8888 indicates that the measurement for an analyte was below the detection limit, the value of -7777 indicates that the measurement for an analyte was above the detection limit, and the value -9999 indicates that no analysis was performed. Producer defined Cruise_ID The alphanumeric cruise identified for the expedition during which the sample was collected producer defined TN403 Cruise identifier for the Escanaba Trough expedition onboard the R/V Thomas G. Thompson in 2022. producer defined Sample_ID The sample ID for each sample Originally defined onboard ship during the cruise by cruise participants. IDs were updated by USGS once sampling was completed. Sample IDs are formatted as Dive#-Rock#-rind (for example, J2-1424-R03-rind is ROV Jason dive number J2-1424, rock number 3, rind composition). Deviations from this naming convention include J2-1420-R01-orange-black-rind (sample collected from an orange-black section of the rock rind), and J2-1423-R04-PartB-bulk-oxidized (One section of sample J2-1423-R04 that was left to oxidize for three days). Sample_Type The type of rock each sample Producer defined rind this is a rind sample producer defined ex-situ oxidation product this is a sample that was oxidized ex-situ in the laboratory producer defined Latitude Latitude at which sample was collected producer defined 40.6987 41.0805 decimal degrees 0.0001 Longitude Longitude at which sample was collected producer defined -127.5392 -127.4518 decimal degrees 0.0001 Water_Depth Water depth in meters at which the sample was collected producer defined 3198 3272 meters 1 Fe Iron concentration in each sample standard reporting value in geochemistry 11500 498000 parts per million 100 Mn Manganese concentration in each sample standard reporting value in geochemistry 32 22400 parts per million 1 Si Silicon concentration in each sample standard reporting value in geochemistry 2400 53800 parts per million 100 Al Aluminum concentration in each sample standard reporting value in geochemistry 400 3800 parts per million 100 Mg Magnesium concentration in each sample standard reporting value in geochemistry 600 3800 parts per million 100 Ca Calcium concentration in each sample standard reporting value in geochemistry 1300 4800 parts per million 100 Na Sodium concentration in each sample standard reporting value in geochemistry 3600 15500 parts per million 100 K Potassium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 1000 2000 parts per million 1000 Ti Titanium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 200 200 parts per million 100 S Sulfur concentration in each sample standard reporting value in geochemistry 6900 355000 parts per million 100 Ag Silver concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 45 275 parts per million 1 As Arsenic concentration in each sample standard reporting value in geochemistry 107 6130 parts per million 1 B Boron concentration in each sample standard reporting value in geochemistry 20 220 parts per million 10 Ba Barium concentration in each sample standard reporting value in geochemistry 457 55100 parts per million 1 Bi Bismuth concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 3 53 parts per million 1 Cd Cadmium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 4 401 parts per million 1 Cl Chlorine concentration in each sample standard reporting value in geochemistry 4000 28100 parts per million 100 Co Cobalt concentration in each sample standard reporting value in geochemistry 1.6 811.0 parts per million 0.1 Cr Chromium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 6 49 parts per million 1 Cu Copper concentration in each sample standard reporting value in geochemistry 130 20100 parts per million 1 Ga Gallium concentration in each sample standard reporting value in geochemistry 1.8 52.2 parts per million 0.1 Ge Germanium concentration in each sample standard reporting value in geochemistry 0.8 45.9 parts per million 0.1 Hf Hafnium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry Values of -8888 indicate that the measurement was below the detection limit (<1 ppm). Hg Mercury concentration in each sample. Values of -7777 indicate that the measurement was above the detection limit. standard reporting value in geochemistry 0.149 91.800 parts per million 0.001 In Indium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.2 9.7 parts per million 0.1 Li Lithium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry Values of -8888 indicate that the measurement was below the detection limit (<15 ppm) Mo Molybdenum concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 42 165 parts per million 1 Nb Niobium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 3.1 3.1 parts per million 0.1 Ni Nickel concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 10 390 parts per million 10 Pb Lead concentration in each sample standard reporting value in geochemistry 197 47400 parts per million 0.1 Rb Rubidium concentration in each sample standard reporting value in geochemistry 1.5 4.8 parts per million 0.1 Sb Antimony concentration in each sample standard reporting value in geochemistry 25 1110 parts per million 1 Sc Scandium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.3 1.4 parts per million 0.1 Se Selenium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 9 264 parts per million 1 Sn Tin concentration in each sample standard reporting value in geochemistry 0.8 385.0 parts per million 0.1 Sr Strontium concentration in each sample standard reporting value in geochemistry 27 6880 parts per million 1 Ta Tantalum concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.3 0.3 parts per million 0.1 Te Tellurium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 6 9 parts per million 1 Th Thorium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.1 0.6 parts per million 0.1 Tl Thallium concentration in each sample standard reporting value in geochemistry 1.2 128.0 parts per million 0.1 U Uranium concentration in each sample standard reporting value in geochemistry 0.5 25.3 parts per million 0.1 V Vanadium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 18 455 parts per million 1 W Tungsten concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.8 22.7 parts per million 0.1 Zn Zinc concentration in each sample standard reporting value in geochemistry 1440 114000 parts per million 10 Zr Zirconium concentration in each sample standard reporting value in geochemistry 4 51 parts per million 1 La Lanthanum concentration in each sample standard reporting value in geochemistry 0.8 49.5 parts per million 0.1 Ce Cerium concentration in each sample standard reporting value in geochemistry 1.0 35.4 parts per million 0.1 Pr Praseodymium concentration in each sample standard reporting value in geochemistry 0.1 4.7 parts per million 0.1 Nd Neodyium concentration in each sample standard reporting value in geochemistry 0.9 21.2 parts per million 0.1 Sm Samarium concentration in each sample standard reporting value in geochemistry 0.1 4.2 parts per million 0.1 Eu Europium concentration in each sample standard reporting value in geochemistry 0.2 11.7 parts per million 0.1 Gd Gadolinium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.4 6.6 parts per million 0.1 Tb Terbium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.1 0.7 parts per million 0.1 Dy Dysprosium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.3 4.7 parts per million 0.1 Y Yttrium content in each sample standard reporting value in geochemistry 0.4 25.6 parts per million 0.1 Ho Holmium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.4 1.0 parts per million 0.1 Er Erbium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.2 2.9 parts per million 0.1 Tm Thulium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.2 0.4 parts per million 0.1 Yb Ytterbium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.1 2.8 parts per million 0.1 SUM_REY Summation of the concentration of rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Y in each sample standard reporting value in geochemistry 3.5 118.5 parts per million 0.1 Percent_HREY Percentage of the heavy rare earth elements calculated by taking the sum of heavy rare earth elements (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and Y and dividing by the total_REY for each sample. standard reporting value in geochemistry 4 40 percent 1 Au Gold concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. standard reporting value in geochemistry 0.014 0.690 parts per million 0.001 Ir Iridium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 0.018 0.022 parts per million 0.001 Os Osmium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry Values of -8888 indicate that the measurement was below the detection limit (0.005) Pd Palladium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 0.013 0.034 parts per million 0.001 Pt Platinum concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 0.010 0.074 parts per million 0.001 Rh Rhodium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 0.008 0.008 parts per million 0.001 Ru Ruthenium concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 0.022 0.022 parts per million 0.001 TOC Total organic carbon concentration in each sample. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry 1490 1490 parts per million 1 TIC Total inorganic carbon concentration in each sample. Values of -8888 indicate that the measurement was below the detection limit. Values of -9999 indicate that no analysis was done. standard reporting value in geochemistry Values of -8888 indicate that the measurement was below the detection limit. Fe_Detection The detection limit for iron concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Mn_Detection The detection limit for manganese concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Si_Detection The detection limit for silicon concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Al_Detection The detection limit for aluminum concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Mg_Detection The detection limit for magnesium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ca_Detection The detection limit for calcium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Na_Detection The detection limit for sodium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million K_Detection The detection limit for potassium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ti_Detection The detection limit for titanium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million S_Detection The detection limit for sulfur concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ag_Detection The detection limit for silver concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million As_Detection The detection limit for arsenic concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million B_Detection The detection limit for boron concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ba_Detection The detection limit for barium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Bi_Detection The detection limit for bismuth concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Cd_Detection The detection limit for cadmium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Cl_Detection The detection limit for chlorine concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Co_Detection The detection limit for cobalt concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Cr_Detection The detection limit for chromium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Cu_Detection The detection limit for copper concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ga_Detection The detection limit for gallium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ge_Detection The detection limit for germanium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Hf_Detection The detection limit for hafnium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Hg_Detection The detection limit for mercury concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million In_Detection The detection limit for indium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Li_Detection The detection limit for lithium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Mo_Detection The detection limit for molybdenum concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Nb_Detection The detection limit for niobium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ni_Detection The detection limit for nickel concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Pb_Detection The detection limit for lead concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Rb_Detection The detection limit for rubidium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Sb_Detection The detection limit for antimony concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Sc_Detection The detection limit for scandium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Se_Detection The detection limit for selenium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Sn_Detection The detection limit for tin concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Sr_Detection The detection limit for strontium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ta_Detection The detection limit for tantalum concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Te_Detection The detection limit for tellurium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Th_Detection The detection limit for thorium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Tl_Detection The detection limit for thallium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million U_Detection The detection limit for uranium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million V_Detection The detection limit for vanadium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million W_Detection The detection limit for tungsten concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Zn_Detection The detection limit for zinc concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Zr_Detection The detection limit for zirconium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million La_Detection The detection limit for lanthanum concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ce_Detection The detection limit for cerium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Pr_Detection The detection limit for praseodymium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Nd_Detection The detection limit for neodymium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Sm_Detection The detection limit for samarium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Eu_Detection The detection limit for europium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Gd_Detection The detection limit for gadolinium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Tb_Detection The detection limit for terbium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Dy_Detection The detection limit for dysprosium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Y_Detection The detection limit for yttrium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ho_Detection The detection limit for holmium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Er_Detection The detection limit for erbium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Tm_Detection The detection limit for thulium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Yb_Detection The detection limit for ytterbium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Au_Detection The detection limit for gold concentration based on the measurement method and instrumentation Producer defined 0.002 0.005 parts per million 100 Ir_Detection The detection limit for iridium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Os_Detection The detection limit for osmium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Pd_Detection The detection limit for palladium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Pt_Detection The detection limit for platinum concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Rh_Detection The detection limit for rhodium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million Ru_Detection The detection limit for ruthenium concentration based on the measurement method and instrumentation Producer defined Numerical value provided by the analyzer in parts per million TOC_Detection The detection limit total organic carbon concentration based on the measurement method and instrumentation. Values of -9999 indicate that the detection limit was not available. Producer defined Numerical value provided by the analyzer in parts per million TIC_Detection The detection limit total inorganic carbon concentration based on the measurement method and instrumentation. Values of -9999 indicate that the detection limit was not available. Producer defined Numerical value provided by the analyzer in parts per million Fe_method An alphanumeric code that denotes the method and instrumentation used to measure iron concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Mn_method An alphanumeric code that denotes the method and instrumentation used to measure manganese concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Si_method An alphanumeric code that denotes the method and instrumentation used to measure silicon concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Al_method An alphanumeric code that denotes the method and instrumentation used to measure aluminum concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Mg_method An alphanumeric code that denotes the method and instrumentation used to measure magnesium concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Ca_method An alphanumeric code that denotes the method and instrumentation used to measure calcium concentration. Values of -8888 indicate that the measurement was below the detection limit. Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Na_method An alphanumeric code that denotes the method and instrumentation used to measure sodium concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined K_method An alphanumeric code that denotes the method and instrumentation used to measure potassium concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Ti_method An alphanumeric code that denotes the method and instrumentation used to measure titanium concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined S_method An alphanumeric code that denotes the method and instrumentation used to measure sulfur concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Ag_method An alphanumeric code that denotes the method and instrumentation used to measure silver concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined As_method An alphanumeric code that denotes the method and instrumentation used to measure aresenic concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined B_method An alphanumeric code that denotes the method and instrumentation used to measure boron concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ba_method An alphanumeric code that denotes the method and instrumentation used to measure barium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Bi_method An alphanumeric code that denotes the method and instrumentation used to measure bismuth concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Cd_method An alphanumeric code that denotes the method and instrumentation used to measure cadmium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Cl_method An alphanumeric code that denotes the method and instrumentation used to measure chlorine concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined Co_method An alphanumeric code that denotes the method and instrumentation used to measure cobalt concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Cr_method An alphanumeric code that denotes the method and instrumentation used to measure choromium concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined Cu_method An alphanumeric code that denotes the method and instrumentation used to measure copper concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ga_method An alphanumeric code that denotes the method and instrumentation used to measure gallium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ge_method An alphanumeric code that denotes the method and instrumentation used to measure germanium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Hf_method An alphanumeric code that denotes the method and instrumentation used to measure hafnium concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined Hg_method An alphanumeric code that denotes the method and instrumentation used to measure mercury concentration Producer defined CVAAS Cold Vapor Atomic Absorption Spectroscopy by ActLabs producer defined In_method An alphanumeric code that denotes the method and instrumentation used to measure indium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Li_method An alphanumeric code that denotes the method and instrumentation used to measure lithium concentration Producer defined ICP_OES_Na2O2 Inductively Coupled Plasma Optical Emission Spectroscopy sodium peroxide fusion by ActLabs producer defined Mo_method An alphanumeric code that denotes the method and instrumentation used to measure molybdenum concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined Nb_method An alphanumeric code that denotes the method and instrumentation used to measure niobium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ni_method An alphanumeric code that denotes the method and instrumentation used to measure nickel concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Pb_method An alphanumeric code that denotes the method and instrumentation used to measure lead concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Rb_method An alphanumeric code that denotes the method and instrumentation used to measure rubidium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabss producer defined Sb_method An alphanumeric code that denotes the method and instrumentation used to measure antimony concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Sc_method An alphanumeric code that denotes the method and instrumentation used to measure scandium concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined Se_method An alphanumeric code that denotes the method and instrumentation used to measure selenium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Sn_method An alphanumeric code that denotes the method and instrumentation used to measure tin concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Sr_method An alphanumeric code that denotes the method and instrumentation used to measure strontium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ta_method An alphanumeric code that denotes the method and instrumentation used to measure tantalum concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Te_method An alphanumeric code that denotes the method and instrumentation used to measure tellurium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Th_method An alphanumeric code that denotes the method and instrumentation used to measure thorium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Tl_method An alphanumeric code that denotes the method and instrumentation used to measure thallium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined U_method An alphanumeric code that denotes the method and instrumentation used to measure uranium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined V_method An alphanumeric code that denotes the method and instrumentation used to measure vanadium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined W_method An alphanumeric code that denotes the method and instrumentation used to measure tungsten concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Zn_method An alphanumeric code that denotes the method and instrumentation used to measure zinc concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Zr_method An alphanumeric code that denotes the method and instrumentation used to measure zirconium concentration Producer defined ICP_MS_FUS Inductively Coupled Plasma Mass Spectrometry, Lithium Borate Fusion by ActLabs producer defined La_method An alphanumeric code that denotes the method and instrumentation used to measure lanthanum concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ce_method An alphanumeric code that denotes the method and instrumentation used to measure cerium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Pr_method An alphanumeric code that denotes the method and instrumentation used to measure praseodymium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Nd_method An alphanumeric code that denotes the method and instrumentation used to measure neodymium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Sm_method TAn alphanumeric code that denotes the method and instrumentation used to measure samarium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Eu_method An alphanumeric code that denotes the method and instrumentation used to measure europium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Gd_method An alphanumeric code that denotes the method and instrumentation used to measure gadolinium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Tb_method An alphanumeric code that denotes the method and instrumentation used to measure terbium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Dy_method An alphanumeric code that denotes the method and instrumentation used to measure dysprosium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Y_method An alphanumeric code that denotes the method and instrumentation used to measure yttrium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ho_method An alphanumeric code that denotes the method and instrumentation used to measure holmium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Er_method An alphanumeric code that denotes the method and instrumentation used to measure erbium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Tm_method An alphanumeric code that denotes the method and instrumentation used to measure thulium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Yb_method An alphanumeric code that denotes the method and instrumentation used to measure ytterbium concentration Producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Au_method An alphanumeric code that denotes the method and instrumentation used to measure gold concentration Producer defined INAA Instrumental Neutron Activation Analysis by ActLabs producer defined ICP_MS_Na2O2 Inductively Coupled Plasma Mass Spectrometry sodium peroxide fusion by ActsLabs producer defined Ir_method An alphanumeric code that denotes the method and instrumentation used to measure iridium concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined Os_method An alphanumeric code that denotes the method and instrumentation used to measure osmium concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined Pd_method An alphanumeric code that denotes the method and instrumentation used to measure palladium concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined Pt_method An alphanumeric code that denotes the method and instrumentation used to measure platinum concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined Rh_method An alphanumeric code that denotes the method and instrumentation used to measure rhodium concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined Ru_method An alphanumeric code that denotes the method and instrumentation used to measure ruthenium concentration Producer defined ICP_MS_NiS_FA Inductively Coupled Plasma Mass Spectrometry, nickel sulfide fire assay by Intertek producer defined TOC_method An alphanumeric code that denotes the method and instrumentation used to measure total organic carbon concentration Producer defined Wt_difference Sample weight difference producer defined TIC_method An alphanumeric code that denotes the method and instrumentation used to measure total inorganic carbon concentration Producer defined UIC UIC CM5230 acid digester attached to a CM5017 coulometer producer defined The first line of the csv 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 These data are available in .csv format contained in a single file. 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 Microsoft Excel 16.16.17 for Mac File contains table in .csv format No compression applied 0.0176 https://doi.org/10.5066/P1DJPX9G Data can be downloaded using the Network_Resource_Name link and selecting the specific Child Items title page None. These data can be viewed with Microsoft Excel or any text reader. 20260403 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 Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998