# Pacific Ocean Geochemical and Foraminiferal Cleaning Procedure Data at 1Mya, 20Kya and 1999-2009 CE #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. # If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/38922 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-ocean-38922.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Paleoceanography # # Dataset_DOI: 10.25921/8q4t-z035 # # Science_Keywords: Earth Surface Conditions Reconstruction, trends #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/paleocean/pacific/cook2024/cook2024-spr0901-04bc.txt # Data_Download_Description: NOAA Template File; Geochemical and Foraminiferal Cleaning Procedure Data # #--------------------------------------- # Contribution_Date # Date: 2024-01-12 #--------------------------------------- # File_Last_Modified_Date # Date: 2024-12-19 #--------------------------------------- # Title # Study_Name: Pacific Ocean Geochemical and Foraminiferal Cleaning Procedure Data at 1Mya, 20Kya and 1999-2009 CE #--------------------------------------- # Investigators # Investigators: Cook, Madelyn (https://orcid.org/0000-0003-2166-6728); Hendy, Ingrid (https://orcid.org/0000-0001-8305-6752) #--------------------------------------- # Description_Notes_and_Keywords # Description: Assessing the impact of sample cleaning on measured Element/Ca ratios in foraminifera from a South Pacific carbonate ooze (Eltanin fracture zone) and siliciclastic sediments in the North Pacific along the continental margin (California Margin) to infer detrital and authigenic contaminant types found on foraminifera tests from endmember depositional environments. # Provided Keywords: Foraminifera, Cleaning procedure, Trace elements, ICP-MS #--------------------------------------- # Publication # Authors: Cook, M.K. and Hendy, I.L. # Published_Date_or_Year: 2024 # Published_Title: Using Element/Ca Response to Cleaning in Foraminifera From Endmember Depositional Environments to Infer Contaminants and Inform Pretreatment # Journal_Name: Geochemistry, Geophysics, Geosystems # Volume: 25 # Edition: # Issue: 2 # Pages: # Report_Number: e2023GC010885 # DOI: 10.1029/2023GC010885 # Online_Resource: # Full_Citation: # Abstract: Past ocean conditions are often reconstructed using the elemental composition of foraminiferal calcite. However, foraminiferal remains are often impacted by post-depositional contaminants; thus, they require cleaning prior to element/Ca (El/Ca) analysis. To explore the impact of sample pretreatment on foraminiferal El/Ca ratios (Li, Na, Mg, Al, Mn, Fe, Zn, Sr, I, Ba, and U) we performed six cleaning procedures on four foraminifera populations from distinct depositional environments: Two from South Pacific carbonate ooze (ELT25-11) and two from the hemi-pelagic sediments of the California Margin (ODP1017E, SPR0901-04BC). Despite differences in regional oceanography, sample type (i.e., surface- or deep-dwelling planktic, benthic), and cleaning procedure, the main driver of El/Ca variability in the data set is the sedimentary depositional environment, suggesting site-specific differences in element concentrations and contaminants. This finding challenges the notion that sample cleaning procedures should be informed by the El/Ca of paleoclimate interest, as elements may be found in different contaminants and/or elemental abundances in unique environments. Our data also show that traditional cleaning methods which use a combination of rinsing, sonication, oxidation/reduction, and complexation reactions effectively remove contaminants found on foraminifera in either depositional environment. However, even after contaminant removal, some elements (i.e., U and Fe) remain higher in California Margin foraminifera relative to South Pacific foraminifera. This suggests that the range of acceptable El/Ca values in the literature must be expanded when working with foraminifera from unusual depositional environments (i.e., hemipelagic, siliciclastic sites with high sedimentation regimes) versus values associated with more typical sites (i.e., a pelagic carbonate ooze). #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Geological Society of America # Grant: #--------------------------------------- # Site_Information # Site_Name: SPR0901-04BC # Location: North Pacific Ocean # Northernmost_Latitude: 34.28 # Southernmost_Latitude: 34.28 # Easternmost_Longitude: -120.04 # Westernmost_Longitude: -120.04 # Elevation_m: -588 #--------------------------------------- # Data_Collection # Collection_Name: SPR0901-04BC # First_Year: 1999 # Last_Year: 2009 # Time_Unit: year Common Era # Core_Length_m: # Parameter_Keywords: geochemistry, trace metals in carbonates, physical properties # Notes: SPR0901-04BC coretop (0-1 cmbsf) represents the an average of the decade preceding core collection (2009) (Hendy et al., 2015). Cleaning procedure abbreviations are: W = water only, C = removal of clays and fine particles, CO = Oxidative cleaning only, CMRO = Modified reductive cleaning (excluding citrate chelating agent) and oxidative cleaning, CRO = Full reductive and oxidative cleaning, CR = Reductive cleaning only. #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## depth_top depth at sample end,,,centimeter,,Paleoceanography,,,N ## depth_bottom depth at sample start,,,centimeter,,Paleoceanography,,,N ## foram notes,,,,,Paleoceanography,,,C,foram ## cleaning notes,,,,,Paleoceanography,,,C,cleaning procedure ## core notes,,,,,Paleoceanography,,,C,core ## Li/Ca lithium/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Na/Ca sodium/calcium,calcium carbonate,,millimole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Mg/Ca magnesium/calcium,calcium carbonate,,millimole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Al/Ca aluminum/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Mn/Ca manganese/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Fe/Ca iron/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Zn/Ca zinc/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Sr/Ca strontium/calcium,calcium carbonate,,millimole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## I/Ca iodine/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## Ba/Ca barium/calcium,calcium carbonate,,micromole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N ## U/Ca uranium/calcium,calcium carbonate,,nanomole per mole,,Paleoceanography,,inductively-coupled plasma mass spectrometry,N #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: depth_top depth_bottom foram cleaning core Li/Ca Na/Ca Mg/Ca Al/Ca Mn/Ca Fe/Ca Zn/Ca Sr/Ca I/Ca Ba/Ca U/Ca 0 1 Bulk planktic W 04BC 19.1 6.2 2.3 50.8 19.1 1727.8 60.4 1.5 0.1 15.8 647.5 0 1 Bulk planktic C 04BC 18.4 5.4 2.1 92.4 21 2406.9 75.3 1.4 0 15.4 712.2 0 1 Bulk planktic CR 04BC 18.3 6.1 1.7 27.5 9.7 99.4 8.9 1.5 0 12.5 21.9 0 1 Bulk planktic CO 04BC 19.2 7.7 2.6 62.5 16.8 1700.9 17.6 1.6 0 16.6 871.7 0 1 Bulk planktic CRO 04BC 7.1 2.8 0.8 61.1 2.3 48.6 25.3 0.6 0 6 0 0 1 Bulk planktic CMRO 04BC 19.7 7.2 2.5 51.5 16.1 690.3 12.8 1.7 0 13.4 530.5 0 1 Bulk planktic W 04BC 19.7 7.9 3.5 73.4 31.5 347 22.5 1.8 0 26.3 398.1 0 1 Bulk planktic C 04BC 18.1 6.8 2.9 55.4 24.1 330.3 19.1 1.5 0 18.6 412 0 1 Bulk planktic CR 04BC 22.2 9.4 3.4 19 7.4 42.7 0 2.2 0 25.2 13.8 0 1 Bulk planktic CO 04BC 17.4 7.3 2.7 69 11.6 165 1.8 1.5 0 23.3 197.5 0 1 Bulk planktic CRO 04BC 7.7 3.6 1.3 41.4 1.5 10.5 0 0.7 0 10.9 0 0 1 Bulk planktic CMRO 04BC 12.2 5.5 1.9 13.3 6.8 31.3 0 1.2 0.1 15.1 36.1