This readme.txt file was generated on 20240622 by Guy N. Evans Recommended citation for the data: ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Elemental analyses of 2019-2020 vent fluid time series from 'Sanya' vent, Main Endeavour Field (northeast Pacific Ocean, 47° 57’ N, 129° 06’ W, ~2200 m water depth) collected using the U. Minn. serial vent fluid sampler 2. Author Information Guy N. Evans Postdoctoral Researcher Aqueous Geochemistry Laboratory PI: William E. Seyfried Department of Earth and Environmental Sciences University of Minnesota Principal Investigator Contact Information Name: William E. Seyfried Jr. Institution: University of Minnesota Address: 116 Church St SE Tate Hall University of Minnesota Minneapolis, MN, 55455 USA Email: wes@umn.edu ORCID: Associate or Co-investigator Contact Information Name: Guy N. Evans Institution: University of Minnesota Address: 116 Church St SE Tate Hall University of Minnesota Minneapolis, MN, 55455 USA Email: gevans@umn.edu ORCID: 0000-0002-5130-929X 3. Date published or finalized for release: 20240630 4. Date of data collection (single date, range, approximate date) Sample collection:2019-2020 Analysis: 2020-2022 5. Geographic location of data collection (where was data collected?): Analyses were performed at University of Minnesota. 6. Information about funding sources that supported the collection of the data: National Science Foundation, grants EAR 1515377 and OCE 1736679 to William E. Seyfried Jr. 7. Overview of the data (abstract): This dataset contains chemical and elemental analyses of a vent fluid time series collected from 'Sanya' vent, Main Endeavour Field (northeast Pacific Ocean, 47° 57’ N, 129° 06’ W, ~2200 m water depth) using the U. Minn. serial vent fluid sampler, deployed at the MEF South science node of Ocean Networks Canada's NEPTUNE cabled observatory. The time series comprises nine samples of seafloor vent fluids collected from 20191008 to 20200526. Sampling methods are described in: Seyfried Jr, W. E., Tan, C., Wang, X., Wu, S., Evans, G. N., Coogan, L. A., Mihaly, S. F., & Lilley, M. D. (2022). Time series of hydrothermal vent fluid chemistry at Main Endeavour Field, Juan de Fuca Ridge: Remote sampling using the NEPTUNE cabled observatory. Deep Sea Research Part I: Oceanographic Research Papers, 186, 103809. Analytical methods are described in: Evans, G. N., Seyfried Jr, W. E., & Tan, C. (2023). Nutrient transition metals in a time series of hydrothermal vent fluids from Main Endeavour Field, Juan de Fuca Ridge, Pacific Ocean. Earth and Planetary Science Letters, 602, 117943. -------------------------- 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): 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: MEF_20192020TimeSeries_Elements.csv Short description: Chemical and elemental analyses of nine seafloor vent fluids collected as a time series from October 2019 to May 2020 at 'Sanya' vent, Main Endeavour Field, by a serial vent fluid sampler developed at University of Minnesota B. Filename: MEF_20192020TimeSeries_MajorElementsRawAverages.csv Short description: C. Filename: MEF_20192020TimeSeries_MajorElementsSampleAggregates Short description: 2. Relationship between files: All files contain analyses of the same sample set. Analyses of individual dilutions reported in MEF_20192020TimeSeries_MajorElementsRawAverages.csv are aggregated by sample and reported in MEF_20192020TimeSeries_MajorElementsSampleAggregates.csv. Analyses reported in MEF_20192020TimeSeries_MajorElementsSampleAggregates.csv are inherited by MEF_20192020TimeSeries_Elements.csv -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: pH by Ross pH electrode Cl, Br, and sulfate by ion chromatography H_2, CO_2, CH_4 by gas chromatography H_2S by iodometric titration Si and Ca by inductively coupled plasma optical emission spectroscopy All other elements by inductively coupled plasma mass spectrometry 2. Methods for processing the data: Standard ICP-MS methods. 3. Instrument- or software-specific information needed to interpret the data: none. 4. Standards and calibration information, if appropriate: Spex CertiPrep elemental standards IAPSO seawater for major seawater ions and alkali metals 5. Environmental/experimental conditions: Seafloor hydrothermal fluids, originally 280-302 degrees C, 220 bar. 6. Describe any quality-assurance procedures performed on the data: 7. People involved with sample collection, processing, analysis and/or submission: Guy N Evans Yanlu Xing William E Seyfried Jr. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: MEF_20192020TimeSeries_Elements.csv ----------------------------------------- 1. Number of variables: 45 variables as rows 2. Number of cases/rows: 1 column for parameter names 1 columns for units 9 columns for samples 1 column for data reference notes 3. Data codes: Code/symbol Definition Ref. Reference a Data originally reported by Seyfried et al. (2022) b Data originally reported by Evans et al. (2023) * Reanalyzed relative to values published in Seyfried et al. (2022) 4. Variable List 1. Name: Sample Description: Sample ID number, chronological 2. Name: Date Description: Date of sample collection 3. Name: Temp. Description: Vent fluid temperature recorded by thermocouple installed on the Benthic and Resistivity Sensor (BARS) installed at MEF South science node. Values in degrees C. 4. Name: pH Description: pH measured by Ross pH electrode at laboratory temperature (25 degrees C). 5. Name: H_2 Description: Dissolved hydrogen concentration measured by gas chromatography. Values in millimole per kilogram (mmol/kg) 6. Name: H_2S Description: Total reduced sulfide concentration measured by iodometric titration. Values in millimole per kilogram (mmol/kg) 7. Name: CH_4 Description: Dissolved methane concentration measured by gas chromatography. Values in millimole per kilogram (mmol/kg) 8. Name: CO_2 Description: Dissolved carbon dioxide concentration measured by gas chromatography. Values in millimole per kilogram (mmol/kg) 9. Name: Sulfate Description: Dissolved sulfate concentration measured by ion chromatography. Values in millimole per kilogram (mmol/kg) 10. Name: Li Description: Dissolved lithium concentration measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 11. Name: Na Description: Dissolved sodium concentration measured by inductively coupled plasma mass spectrometry. Values in millimole per kilogram (mmol/kg) 12. Name: K Description: Dissolved potassium concentration measured by inductively coupled plasma mass spectrometry. Values in millimole per kilogram (mmol/kg) 13. Name: Rb Description: Dissolved rubidium concentration measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 14. Name: Cs Description: Dissolved cesium concentration measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 15. Name: Be Description: Dissolved beryllium concentration measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 16. Name: Mg Description: Dissolved magnesium concentration measured by inductively coupled plasma mass spectrometry. Values in millimole per kilogram (mmol/kg) 17. Name: Ca Description: Dissolved calcium concentration measured by inductively coupled plasma optical emission spectrometry. Values in millimole per kilogram (mmol/kg) 18. Name: Sr Description: Dissolved strontium concentration measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 19. Name: Ba Description: Total barium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 20. Name: Cl Description: Dissolved chloride concentration measured by ion chromatography. Values in millimole per kilogram (mmol/kg) 21. Name: Br Description: Dissolved bromide concentration measured by ion chromatography. Values in millimole per kilogram (mmol/kg) 22. Name: V Description: Total vanadium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 23. Name: Cr Description: Total chromium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 24. Name: Mo Description: Total molybdenum concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 25. Name: W Description: Total tundsten concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 26. Name: Mn Description: Total manganese concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in millimole per kilogram (mmol/kg) 27. Name: Fe Description: Total iron concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in millimole per kilogram (mmol/kg) 28. Name: Co Description: Total cobalt concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 29. Name: Ni Description: Total nickel concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 30. Name: Cu Description: Total copper concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 31. Name: Ag Description: Total silver concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 32. Name: Au Description: Total gold concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 33. Name: Zn Description: Total zinc concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 34. Name: Cd Description: Total cadmium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 35. Name: B Description: Total boron concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 36. Name: Al Description: Total aluminum concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in micromole per kilogram (umol/kg) 37. Name: Ga Description: Total gallium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 38. Name: In Description: Total indium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 39. Name: Tl Description: Total thallium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 40. Name: Si Description: Total silicon concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma optical emission spectrometry. Values in millimole per kilogram (mmol/kg) 41. Name: Ge Description: Total germanium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 42. Name: Pb Description: Total lead concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 43. Name: As Description: Total arsenic concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 44. Name: Sb Description: Total antimony concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) 45. Name: Se Description: Total selenium concentration based on analysis of acidified dissolved fractions and reverse aqua regia digested particulate fractions, measured by inductively coupled plasma mass spectrometry. Values in nanomole per kilogram (nmol/kg) ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: MEF_20192020TimeSeries_MajorElementsRawAverages.csv ----------------------------------------- 1. Number of variables: 8 variables as columns 2. Number of cases/rows: 60 samples as rows 3. Data codes: none 4. Variable List 1. Name: Sample Description: Sample name. IAPSO = IAPSO seawater; Main Endeavour Time Series vent fluids as MEF1-MEF9 2. Name: Dilution Number Description: Label of dilution, arbitrarily 1-6 3. Name: Total Dilution Factor Description: Gravimetric dilution factor, approximately 850 4. Name: 7Li (SQ-KED) Description: Lithium concentration analyzed by inductively coupled plasma mass spectrometry, measured on mass 7 in single quadrupole kinetic energy discrimination mode. Values in micromole per kilogram (umol/kg) 5. Name: 23Na (SQ-KED) Description: Sodium concentration analyzed by inductively coupled plasma mass spectrometry, measured on mass 23 in single quadrupole kinetic energy discrimination mode. Values in millimole per kilogram (mmol/kg) 6. Name: 24Mg | 24Mg (TQ-O2) Description: Magnesium concentration analyzed by inductively coupled plasma mass spectrometry, measured on mass 24 in triple quadrupole, oxygen collision cell mode. Values in millimole per kilogram (mmol/kg) 7. Name:39K (SQ-KED) Description: Potassium concentration analyzed by inductively coupled plasma mass spectrometry, measured on mass 39 in single quadrupole kinetic energy discrimination mode. Values in millimole per kilogram (mmol/kg) 8. Name: 55Mn (SQ-KED) Description: Manganese concentration analyzed by inductively coupled plasma mass spectrometry, measured on mass 55 in single quadrupole kinetic energy discrimination mode. Values in micromole per kilogram (umol/kg) ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: MEF_TimeSeries_MajorElementsSampleAggregates.csv ----------------------------------------- 1. Number of variables: 17 variables as columns 2. Number of cases/rows: 10 samples as rows 1 row literature values 3. Data codes: code definition AVG average SE Standard Error RSE relative Standard Error 4. Variable List 1. Name: Sample Description: Sample name. Main Endeavour Time Series vent fluids as MEF1-MEF9; IAPSO = IAPSO seawater (salinity = 34.992) 2. Name: Date Description: Date of sample collection 3. Name: Li_AVG Description: Average lithium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in micromole per kilogram (umol/kg) 4. Name: Li_SE Description: Standard error of lithium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in micromole per kilogram (umol/kg) 5. Name: Li_RSE Description: Relative standard error of lithium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in percent (%) 6. Name: Na_AVG Description: Average sodium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 7. Name: Na_SE Description: Standard error of sodium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 8. Name: Na_RSE Description: Relative standard error of sodium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in percent (%) 9. Name: Mg_AVG Description: Average magnesium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 10. Name: Mg_SE Description: Standard error of magnesium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 11. Name: Mg_RSE Description: Relative standard error of magnesium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in percent (%) 12. Name: K_AVG Description: Average potassium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 13. Name: K_SE Description: Standard error of potassium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (mmol/kg) 14. Name: K_RSE Description: Relative standard error of potassium concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in percent (%) 15. Name: Mn_AVG Description: Average manganese concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (umol/kg) 16. Name: Mn_SE Description: Standard error of manganese concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in millimole per kilogram (umol/kg) 17. Name: Mn_RSE Description: Relative standard error of manganese concentration based on six dilutions of the same sample analyzed by inductively coupled plasma mass spectrometry Values in percent (%)