This readme.txt file was generated on <20240620> by Recommended citation for the data: ------------------- GENERAL INFORMATION ------------------- 1. Seyfried Lab Data: Geochemical Analyses of Lost City Vent Fluids (collected 2008; analyzed 2022) and experimental fluids from lherzolite alteration experiments (2022) 2. Guy Evans, Postdoctoral Researcher in Aqueous Geochemistry Lab (PI: William E. Seyfried Jr.), Department of Earth and Environmental Sciences, University of Minnesota. Principal Investigator Contact Information Name: William E. Seyfried Jr. Institution: University of Minnesota Address: Tate Hall, 116 Church St, Minneapolis, MN, 55455, USA Email: wes@umn.edu ORCID: Associate or Co-investigator Contact Information Name: Guy N Evans Institution: University of Minnesota Address: Tate Hall, 116 Church St, Minneapolis, MN, 55455, USA Email: gevans@umn.edu ORCID: 3. Date published or finalized for release: 2024 4. Date of data collection Lost City vent fluid sample collection 2008 hydrothermal experiments 2022 chemical analyses 2022 5. Geographic location of data collection (where was data collected?): Samples were collected at Lost City Hydrothermal Field (30° 07’ N, 42°07’ W, 700 m below sea level) Experiments and analyses were conducted in Tate Hall, University of Minnesota, Minneapolis, MN 6. Information about funding sources that supported the collection of the data: NASA Astrobiology Program ICAR grant [80NSSC21K0592] Title: What life wants: Exploring the natural selection of elements” funded by the Metal Utilization and Selection across Eons (MUSE) Interdisciplinary Consortium for Astrobiology Research (ICAR) at the University of Wisconsin - Madison sponsored by the National Aeronautics and Space Administration Science Mission Directorate (19-ICAR19_2-0007). National Science Foundation – Marine Geology & Geophysics (MGG – 1736679). 7. Overview of the data (abstract): This data set contains chemical analyses of vent fluids collected from Lost City Hydrothermal Field (LCHF) using isobaric gat tight samples in 2008 (cruise KNOX18RR). Acidified vent fluid samples archived at University of Minnesota were analyzed for trace elements in 2022 by triple quadrupole inductively coupled plasma mass spectrometer (Thermo Fisher Scientific iCAP TQ, Waltham, MA, USA) with a focus on nutrient transition metal concentrations. An analysis of contemporaneous seawater local to LCHF is also included. This data set also includes chemical analyses of experimental fluid samples obtained from a hydrothermal lherzolite alteration experiment performed at the University of Minnesota in Spring, 2022. 45 g spinel lherzolite from Damaping, Hebei, China (LDMP) was reacted with aqueous solution containing Na = 410 mmol/kg, Ca = 45 mmol/kg, Cl = 500 mmol/kg at 300 degrees C, 500 bar an initial water:rock mass ratio of 1:1.~16 g of fluid was withdrawn over the course of the 60 day experiment for a final water rock ratio of 8:10. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: 2. Links to publications that cite or use the data: 3. Was data derived from another source? If yes, list source(s): Data for temperature, pH, H2, sulfide, Cl, and K in Lost City vent fluids are from Seyfried Jr, W. E., Pester, N. J., Tutolo, B. M., & Ding, K. (2015). The Lost City hydrothermal system: Constraints imposed by vent fluid chemistry and reaction path models on subseafloor heat and mass transfer processes. Geochimica et Cosmochimica Acta, 163, 59-79. 4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/policies/#drum-terms-of-use --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: LostCityVentFluids_GeochemicalAnalyses.csv Short description: Geochemical analyses of Lost City Vent Fluids, collected in 2008. Trace elements analyzed in 2022 B. Filename: LDMP300Fluid_GeochemicalAnalyses.csv Short description: Geochemical analyses of experimental fluids from hydrothermal lherzolite alteration experiment C. Filename: LDMP300Rocks_GeochemicalAnalyses.csv Short description: Geochemical analyses of rocks from hydrothermal lherzolite alteration experiment 2. Relationship between files: Files B. (LDMP300Fluid_GeochemicalAnalyses.csv) and C. (LDMP300Rocks_GeochemicalAnalyses.csv) refer to samples from the same hydrothermal lherzolite alteration experiments. -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: This data set contains chemical analyses of vent fluids collected from Lost City Hydrothermal Field (LCHF) using isobaric gat tight samples in 2008 (cruise KNOX18RR). Acidified vent fluid samples archived at University of Minnesota were analyzed for trace elements in 2022 by triple quadrupole inductively coupled plasma mass spectrometer (Thermo Fisher Scientific iCAP TQ, Waltham, MA, USA)with a focus on nutrient transition metal concentrations. To account for water loss during storage, trace element analyses have been renormalized to match published K concentrations in: Seyfried Jr, W. E., Pester, N. J., Tutolo, B. M., & Ding, K. (2015). The Lost City hydrothermal system: Constraints imposed by vent fluid chemistry and reaction path models on subseafloor heat and mass transfer processes. Geochimica et Cosmochimica Acta, 163, 59-79. Experimental fluid samples were analyzed for pH by ROSS pH electrode (Thermo Fisher Scientific, Waltham, MA, USA), total dissolved sulfide by iodometric titration (U.S. EPA, Method 9034), H2 by gas chromatography (Agilent 6980, Santa Clara, CA, USA), and major anions by ion chromatography (Dionex ICS-5000, Thermo Fisher Scientific, Waltham, MA, USA). Trace metal analyses of were performed at the University of Minnesota using a triple quadrupole inductively coupled plasma mass spectrometer (Thermo Fisher Scientific iCAP TQ, Waltham, MA, USA). 2. Methods for processing the data: Data were processed using standard methods for ICP-MS analysis prior to submission. 3. Instrument- or software-specific information needed to interpret the data: none. 4. Standards and calibration information, if appropriate: ICP-MS and ICP-OES analyses measured against gravimetrically diluted Spex CertiPrep single and multielement standards. Rock samples performed simultaneously with analyses of USGS rock standard PCC-1 5. Environmental/experimental conditions: Seafloor hydrothermal fluids; Experiments at 300 C; 500 bar. 6. Describe any quality-assurance procedures performed on the data: Data were processed using standard methods for ICP-MS analysis (e.g., blank corrected) prior to submission. 7. People involved with sample collection, processing, analysis and/or submission: William E. Seyfried Jr. Guy N. Evans ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [LostCityVentFluids_GeochemicalAnalyses.csv][LDMP300Fluid_GeochemicalAnalyses.csv] ----------------------------------------- 1. Variable List Fluid dataset parameters for are as follows: with the following abbreviations: elect = pH electrode GC = gas chromatography titr = iodimetric titration IC = ion chromatography ICP-OES = inductively coupled plasma optical emission spectrometry ICP-MS = inductively coupled plasma mass spectrometry Parameter, Method, Value Type, Units, missing data/no data value Temperature, thermocouple ,value ,°C, -- pH ,elect, value ,at 25 °C, -- H2 ,GC ,value ,mmol/kg, -- Sulfide ,titr ,value ,mmol/kg, -- Cl ,IC ,value ,mmol/kg, -- Sulfate ,IC ,value ,mmol/kg, -- Si ,ICP-OES, value ,µmol/kg, -- Li_AVG ,ICP-MS ,average ,µmol/kg, -- Li_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Na_AVG ,ICP-MS ,average ,mmol/kg, -- Na_SD ,ICP-MS ,standard deviation ,mmol/kg, -- Mg_AVG ,ICP-MS ,average ,mmol/kg, -- Mg_SD ,ICP-MS ,standard deviation ,mmol/kg, -- Ca_AVG ,ICP-OES ,average ,mmol/kg, -- Ca_SD ,ICP-OES ,standard deviation ,mmol/kg, -- K_AVG ,ICP-MS ,average ,mmol/kg, -- K_SD ,ICP-MS ,standard deviation ,mmol/kg, -- V_AVG ,ICP-MS ,average ,nmol/kg, -- V_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Mn_AVG ,ICP-MS ,average ,µmol/kg, -- Mn_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Fe_AVG ,ICP-MS ,average ,µmol/kg, -- Fe_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Co_AVG ,ICP-MS ,average ,nmol/kg, -- Co_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Ni_AVG ,ICP-MS ,average ,nmol/kg, -- Ni_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Cu_AVG ,ICP-MS ,average ,nmol/kg, -- Cu_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Zn_AVG ,ICP-MS ,average ,nmol/kg, -- Zn_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Mo_AVG ,ICP-MS ,average ,nmol/kg, -- Mo_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Cd_AVG ,ICP-MS ,average ,nmol/kg, -- Cd_SD ,ICP-MS ,standard deviation ,nmol/kg, -- W_AVG ,ICP-MS ,average ,nmol/kg, -- W_SD ,ICP-MS ,standard deviation ,nmol/kg, -- ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [LDMP300Fluid_GeochemicalAnalyses.csv] ----------------------------------------- 1. Variable List Fluid dataset parameters for are as follows: with the following abbreviations: elect = pH electrode GC = gas chromatography titr = iodimetric titration IC = ion chromatography ICP-OES = inductively coupled plasma optical emission spectrometry ICP-MS = inductively coupled plasma mass spectrometry Parameter, Method, Value Type, Units, missing data/no data value Temperature, thermocouple ,value ,°C, -- pH ,elect, value ,at 25 °C, -- H2 ,GC ,value ,mmol/kg, -- Sulfide ,titr ,value ,mmol/kg, -- Cl ,IC ,value ,mmol/kg, -- Sulfate ,IC ,value ,mmol/kg, -- Si ,ICP-OES, value ,µmol/kg, -- Li_AVG ,ICP-MS ,average ,µmol/kg, -- Li_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Na_AVG ,ICP-MS ,average ,mmol/kg, -- Na_SD ,ICP-MS ,standard deviation ,mmol/kg, -- Mg_AVG ,ICP-MS ,average ,mmol/kg, -- Mg_SD ,ICP-MS ,standard deviation ,mmol/kg, -- Ca_AVG ,ICP-OES ,average ,mmol/kg, -- Ca_SD ,ICP-OES ,standard deviation ,mmol/kg, -- K_AVG ,ICP-MS ,average ,mmol/kg, -- K_SD ,ICP-MS ,standard deviation ,mmol/kg, -- V_AVG ,ICP-MS ,average ,nmol/kg, -- V_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Mn_AVG ,ICP-MS ,average ,µmol/kg, -- Mn_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Fe_AVG ,ICP-MS ,average ,µmol/kg, -- Fe_SD ,ICP-MS ,standard deviation ,µmol/kg, -- Co_AVG ,ICP-MS ,average ,nmol/kg, -- Co_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Ni_AVG ,ICP-MS ,average ,nmol/kg, -- Ni_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Cu_AVG ,ICP-MS ,average ,nmol/kg, -- Cu_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Zn_AVG ,ICP-MS ,average ,nmol/kg, -- Zn_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Mo_AVG ,ICP-MS ,average ,nmol/kg, -- Mo_SD ,ICP-MS ,standard deviation ,nmol/kg, -- Cd_AVG ,ICP-MS ,average ,nmol/kg, -- Cd_SD ,ICP-MS ,standard deviation ,nmol/kg, -- W_AVG ,ICP-MS ,average ,nmol/kg, -- W_SD ,ICP-MS ,standard deviation ,nmol/kg, -- ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [LDMP300Rock_GeochemicalAnalyses.csv] ----------------------------------------- 1. Variable List Rock dataset parameters for are as follows: with the following abbreviations: ICP-MS = inductively coupled plasma mass spectrometry EMPA = electron microprobe analysis ug/g = microgram per gram Parameter, Method, Units, missing data/no data value MgO , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- Al2O3 , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- K2O , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- TiO2 , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- FeO , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- CaO , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- Na2O , ICP-MS, EMPA, whole rock by total digestion, ICP-MS; mineral by EMPA, wt%, -- SiO2 *, by difference by difference wt%, -- V, ICP-MS, total digestion, ICP-MS ug/g, -- Cr, ICP-MS, total digestion, ICP-MS ug/g, -- Mn, ICP-MS, total digestion, ICP-MS ug/g, -- Co, ICP-MS, total digestion, ICP-MS ug/g, -- Ni, ICP-MS, total digestion, ICP-MS ug/g, -- Cu, ICP-MS, total digestion, ICP-MS ug/g, -- Zn, ICP-MS, total digestion, ICP-MS ug/g, -- Mo, ICP-MS, total digestion, ICP-MS ug/g, -- Cd, ICP-MS, total digestion, ICP-MS ng/g, -- W, ICP-MS, total digestion, ICP-MS ug/g, --