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  • American Physical Society  (1,096)
  • Public Library of Science  (111)
  • PANGAEA  (103)
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  • 1
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    (Table 1) Geochemistry of the ETM-2 section from IODP Hole 302-M0004A
    PANGAEA
    In:  Supplement to: Dickson, Alexander J; Cohen, Anthony S (2012): A molybdenum isotope record of Eocene Thermal Maximum 2: Implications for global ocean redox during the early Eocene. Paleoceanography, 27(3), PA3230, https://doi.org/10.1029/2012PA002346
    Details
    Publication Date: 2023-06-27
    Description: During the early Eocene, a series of short-term global warming events ("hyperthermals”) occurred in response to the rapid release of carbon into the oceans and atmosphere. In order to investigate the response of ocean redox to global warming, we have determined the molybdenum isotope compositions (d98/95Mo) of samples spanning one such hyperthermal (Eocene Thermal Maximum 2 (ETM-2, 54.1 Ma)), from Integrated Ocean Drilling Program Expedition 302 Site M0004A in the Arctic Ocean. The highest d98/95Mo in our sample set (2.00 ± 0.11 per mil) corresponds to the development of local euxinia at Site M0004A during the peak of ETM-2, which we interpret as recording the global seawater d98/95Mo at that time. The ETM-2 seawater d98/95Mo is indistinguishable from a recent estimate of seawater d98/95Mo from an earlier hyperthermal (Paleocene Eocene Thermal Maximum (PETM, 55.9 Ma), d98/95Mo = 2.08 ± 0.11 per mil). We argue that the similarity in seawater d98/95Mo during ETM-2 and the PETM was caused by the development of transient euxinia in the Arctic Ocean during each hyperthermal that allowed sediments accumulating in this basin to capture the long-term d98/95Mo of early Eocene seawater. Our new data therefore place a minimum constraint on the magnitude of transient global seafloor deoxygenation during early Eocene hyperthermals.
    Keywords: 302-M0004A; ACEX-M4A; Arctic Coring Expedition, ACEX; Arctic Ocean; CCGS Captain Molly Kool (Vidar Viking); DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Iron oxide, Fe2O3; Molybdenum; Rhenium; Sample code/label; Titanium dioxide; δ13C, organic carbon; δ98/95Mo; δ98/95Mo, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 105 data points
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  • 2
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    Lipid biomarker results from the Oligocene and Miocene of IODP Hole 318-U1356 (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Concentrations of isoGDGTs and brGDGTs, All samples and corresponding depths, ages, lithology (* = generally greener intervals or very small intervals with laminations that were not incorporated into the log of Salabarnada et al., 2018), method used, isoprenoid and branched GDGT integrated values, TEX86, BIT, Methane Index (MI), GDGT-2/Crenarchaeol ratios GDGT-0/Crenarchaeol ratios and GDGT-2/GDGT-3 ratios, and #rings-tetra values. Discarded samples are indicated in the Outlier column. Discards based on BIT and #rings-tetra are indicated with an 'a'. Discarded samples with GDGT-0/Crenarchaeol ratio above 2.0 are indicated with a 'b', those with MI values above 0.3 are indicated with a 'c', those with GDGT-2/crenarchaeol ratios above 0.4 with 'd' and those with ΔRI value above 0.6 with an 'O'. Discarded samples taken from mass waste deposits are underlined.Note that data from mass waste deposits are included in this dataset, but may have to be discarded.
    Keywords: 318-U1356A; Age model; Age model, Gradstein et al. (2012) GTS2012; Analytical method; Antarctica; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether, Ia (peak area); Branched glycerol dialkyl glycerol tetraether, IIa (peak area); Branched glycerol dialkyl glycerol tetraether, IIIa (peak area); Crenarchaeol (peak area); Crenarchaeol isomer (peak area); Cyclopentane rings in tetramethylated branched glycerol dialkyl glycerol tetraether; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; Exp318; GDGT; IODP; Isoprenoid acyclic glycerol dialkyl glycerol tetraether (peak area); Isoprenoid dicyclic glycerol dialkyl glycerol tetraether (peak area); Isoprenoid monocyclic glycerol dialkyl glycerol tetraether (peak area); Isoprenoid tricyclic glycerol dialkyl glycerol tetraether (peak area); Joides Resolution; Main Lithology; Methane index; Miocene; Oligocene; Ratio; Ring index; Sample code/label; Sample comment; Tetraether index of 86 carbon atoms; U1356; Wilkes Land
    Type: Dataset
    Format: text/tab-separated-values, 3260 data points
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  • 3
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    Leaf wax n-alkane carbon isotope data from sediment samples collected from fossil leaf sites extending from New Mexico to the High Arctic (2019)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Description: Site information and leaf wax n-alkane carbon isotope data from sediment samples collected from fossil leaf sites extending from New Mexico to the High Arctic and span 40 million years from the Late Cretaceous to the Oligocene.
    Keywords: after Foster et al., 2017; after Tipple et al., 2010; AGE; Age, maximum/old; Age, minimum/young; Axel_Heiberg_Island; Axel Heiberg Island, Canadian Arctic; Big_Cedar_Ridge; Boulder_Hills; British Columbia, Canada; Calculated; Carbon, organic, total; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure maximum; Carbon dioxide, partial pressure minimum; Cf-1_Carbonaceous_Bed; Colorado, United States of America; Cretaceous; Dorsey_Creek_Fence_Carbonaceous_Bed; Driftwood_Canyon,_British_Columbia; Ellesmere Island, Canadian Arctic Archipelago; Epoch; Event label; Falkland; Fifteenmile_Carbonaceous_Bed; Florissant_Fossil_Beds_National_Monument; Formation; Fosheim_Anticline; fossil leaves; Grimy_Gulch; Honeycombs_Carbonaceous_Bed; Hot_Weather_Creek; Kaiparowitz; Kissinger_Lake; Lake_Hazen_9-US261; Latest_Paleocene_level; LATITUDE; leaf waxes; Lithology/composition/facies; Location; LONGITUDE; Method comment; Mosquito_Creek; n-Alkane C12, per unit sediment mass; n-Alkane C13, per unit sediment mass; n-Alkane C14, per unit sediment mass; n-Alkane C15, per unit sediment mass; n-Alkane C16, per unit sediment mass; n-Alkane C17, per unit sediment mass; n-Alkane C18, per unit sediment mass; n-Alkane C19, per unit sediment mass; n-Alkane C20, per unit sediment mass; n-Alkane C21, per unit sediment mass; n-Alkane C22, per unit sediment mass; n-Alkane C23, per unit sediment mass; n-Alkane C24, per unit sediment mass; n-Alkane C25, per unit sediment mass; n-Alkane C26, per unit sediment mass; n-Alkane C27, per unit sediment mass; n-Alkane C28, per unit sediment mass; n-Alkane C29, per unit sediment mass; n-Alkane C29, δ13C; n-Alkane C30, per unit sediment mass; n-Alkane C31, per unit sediment mass; n-Alkane C31, δ13C; n-Alkane C32, per unit sediment mass; n-Alkane C33, per unit sediment mass; n-Alkane C34, per unit sediment mass; n-Alkane C35, per unit sediment mass; n-alkanes; New Mexico, United States of America; Organic Geochemistry; paleobotany; Paleogene; Pitch_Pinnacle; Precipitation, annual mean; Precipitation, annual mean, maximum; Precipitation, annual mean, minimum; Sample ID; San_Juan_Basin; Site; Split_Lake; Stenkul_Fiord; Strathcona_Fiord_11-US422; Temperature, annual mean; Temperature, annual mean, maximum; Temperature, annual mean, minimum; Utah, United States of America; WCS7; Wind_River_Basin; Wyoming, United States of America; δ13C, carbon dioxide, atmospheric; δ13C, carbon dioxide, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 9292 data points
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  • 4
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    Molybdenum isotope compositions and concentrations from the Eagle Ford Group, South Texas (2021)
    PANGAEA
    Details
    Publication Date: 2023-09-30
    Description: This dataset consists of molybdenum isotope compositions and concentrations of marlstones and limestones of the Eagle Ford Group, South Texas. The data are Late Cretaceous in age, and span several millions of years before and after Oceanic Anoxic Event 2 (~94 Ma). The data were measured on samples taken from two research cores, Iona-1 and Innes-1.
    Keywords: Cretaceous Western Interior Seaway; Eagle Ford Group; molybdenum isotopes; Oceanic Anoxic Event 2
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    Flow cytometric assessment of virus-like particle, prokaryote and small phototrophic eukaryote abundances from sea foam, surface microlayer, 1-m depth, rainwater from the Swedish Skagerrak (Feb 2020) (2023)
    PANGAEA
    Details
    Publication Date: 2023-10-14
    Description: Flow cytometry samples for analysis of virus-like particle, prokaryote and small phototrophic eukaryote abundances were collected from sea foam, surface microlayer and 1-m deep water from the Swedish Skagerrak during a 1-month campaign at Tjärnö Marine Laboratory in February 2020. Using a small boat, foam and microlayer were collected using a glass plate sampler, and 1-m deep water using a syringe connected to a hose. In addition, rainwater for flow cytometry was collected close to the coast in Duran bottles. Samples were fixed with glutardialdehyde (1% final concentration, Merck, Sweden), stored for 1 hour in the dark and subsequently stored at -80 °C. The purpose of the cellular and viral abundance assessment was to complement metagenomic analyses to investigate viral dispersal across the air-sea interface and along the natural water cycle. In addition, metadata for light conditions, wind speed, salinity, and temperature were recorded. For further details on the campaign and flow cytometric analysis, please refer to Rahlff et al., 2022.
    Keywords: air-sea; Anemometer, AN-10, Voltcraft; ASSEMBLE_Plus; Association of European Marine Biological Laboratories Expanded; bacterial abundance; Brightness; Comment; DATE/TIME; Date/Time local; EcoMol; Eukaryotes, phototrophic, small; Event label; Flow cytometer, BD Biosciences, BD Accuri C6; Galaxy Sensors smartphone application v.1.8.10; Habitat; LATITUDE; LONGITUDE; Microbial Dispersal from Sea to Air and Snow; MIDSEAS; MULT; Multiple investigations; neuston; Ökologie, Physiologie und Molekularbiologie der Roseobacter-Gruppe: Aufbruch zu einem systembiologischen Verständnis einer global wichtigen Gruppe mariner Bakterien; PhD Research Training Group The Ecology of Molecules; Prokaryotes; Salinity; Sample method; sea foam; sea-surface microlayer; Skagerrak; Skagerrak_1; Skagerrak_10a; Skagerrak_10b; Skagerrak_11; Skagerrak_12/R; Skagerrak_2; Skagerrak_3; Skagerrak_4; Skagerrak_5; Skagerrak_6; Skagerrak_7; Skagerrak_8; Skagerrak_9; Station label; Temperature, water; Thermosalinometer, portable, WTW Multiline 3420; TRR51; virus-like particles; Virus-like particles; Wind speed, maximum; Wind speed, minimum
    Type: Dataset
    Format: text/tab-separated-values, 370 data points
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  • 6
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    Conifers are a major source of sedimentary leaf wax n-alkanes when dominant on the landscape: Case studies from the Paleogene (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-30
    Description: Paleobotanical site information, terpenoid, n-alkane, and other and biomarker quantification and carbon isotope data from sediment samples collected from North America Paleogene fossil leaf sites that extend from Colorado to the High Arctic. Sediment samples were collected laterally along fossil leaf-bearing zones. To disentangle the vegetation source of sediment n-alkanes, we measured the carbon isotope (δ13C) values of nonsteroidal triterpenoids (angiosperm biomarkers) and tricyclic diterpenoids (conifer biomarkers) to determine angiosperm and conifer end member δ13C values. Compounds were isolated using column chromatography and identified and quantified with an Agilent 7890A gas chromatograph (GC) interfaced to an Agilent 5975C quadrupole mass selective detector (MSD) and flame ionization detector (FID). Compound-specific carbon isotope analyses were performed, where possible, on n-C27 through n-C35 alkanes, diterpenoids, and triterpenoids by gas chromatograph-combustion-isotope ratio mass spectrometry (GC-C-IRMS).
    Keywords: 1,2,3,4-Tetrahydroretene, δ13C; 1,2,9-Trimethyl-1,2,3,4-tetrahydropicene, δ13C; 13alpha(H)-Fichtelite, δ13C; 18-Norabieta-8,11,13-triene, δ13C; 18-Norisopimarane, δ13C; 19-Norabieta-3,8,11,13-tetraene, δ13C; 19-Norabieta-4,8,11,13-tetraene, δ13C; 19-Norabieta-8,11,13-triene, δ13C; 2,2,4a,9-Tetramethyl-1,2,3,4,4a,5,6,14b-octahydropicene, δ13C; 2,2,9-Trimethyl-1,2,3,4-tetrahydropicene, δ13C; 2-Methyl-1-(4'-methylpentyl)-6-isopropylnaphthalene, δ13C; Abieta-8,11,13-triene, δ13C; Abietane, δ13C; AGE; Age, maximum/old; Age, minimum/young; Average chain length; Axel_Heiberg_Island; Axel Heiberg Island, Canadian Arctic; Belt_Ash_Carbonaceous_Bed; Boulder_Hills; British Columbia, Canada; Carbon, organic, total; carbon isotope; Carbon Preference Index; Cf-1_Carbonaceous_Bed; Colorado, United States of America; conifers; Creede; Dehydroicetexane, δ13C; Des-A-26-norlupa-5,7,9-triene, δ13C; Des-A-lupane, δ13C; Diaromatic tricyclic totarane, δ13C; Dinor-oleana(ursa)-1,3,5(10)-triene, δ13C; Diterpenoids, plant-derived; Dorsey_Creek_Fence_Carbonaceous_Bed; Driftwood_Canyon,_British_Columbia; Ellesmere Island, Canadian Arctic Archipelago; ent-13-epi manoyl oxide, δ13C; ent-Beyerane, δ13C; Epoch; Event label; Fifteenmile_Carbonaceous_Bed; Florissant_Fossil_Beds_National_Monument; Fosheim_Anticline; Gas chromatography (Agilent GC 7890) interfaced to a quadrupole mass selective detector (MSD, Agilent 5975C ) and flame ionization detector (FID); Gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS); Grimy_Gulch; Honeycombs_Carbonaceous_Bed; Hot_Weather_Creek; Isonorpimarane, δ13C; Isopimarane, δ13C; Lake_Hazen_9-US261; Latest_Paleocene_level; Latitude of event; Lithology/composition/facies; Location; Long-chain n-alkanes, C27-C35; Longitude of event; Mosquito_Creek; n-alkane; n-Alkane C27, δ13C; n-Alkane C29, δ13C; n-Alkane C31, δ13C; n-Alkane C33, δ13C; n-Alkane C35, δ13C; Norpimarane, δ13C; Olean-11,13(18)-diene, δ13C; Olean-12-ene, δ13C; Olean-18-ene, δ13C; Paleogene; Pimarane, δ13C; Pristane/Phytane ratio; Retene, δ13C; Sample ID; Simonellite, δ13C; Site; Split_Lake; Stenkul_Fiord; Strathcona_Fiord_11-US422; terpenoid; Terrigenous/aquatic ratio; Tetracyclic diterpane, δ13C; Tetramethyloctahydropicene isomer, δ13C; Thermal maturity, hopane; Triterpenoids, plant-derived; Vegetation type; WCS7; Wyoming, United States of America; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 2328 data points
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  • 7
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    Geochemical data from the Cenomanian-Turonian interval of ODP Hole183-1138A (2020)
    PANGAEA
    Details
    Publication Date: 2023-12-07
    Description: Geochemical data from Ocean Drilling Program Site 1138A, core 69, spanning the Cenomanian–Turonian boundary interval (~94 Ma). The data were generated from marine sediment in the archive half of the core, which was opened and sampled for this project following approval from the IODP curatorial advisory board. The data consist of: (i) Bulk organic geochemistry (total organic carbon, hydrogen and oxygen indexes, total inorganic carbon) measured by Rock Eval pyrolysis and coulormat titration; (ii) Bulk organic carbon isotopes, measured on decarbonated sediments; (iii) Bulk sediment elemental concentrations measured by ICP-MS; (iv) Bulk sediment molybdenum isotopes, measured by MC-ICP-MS; (v) n-alkane compound-specific carbon isotopes measured by GCMS-IRMS; (vi) Maceral assemblage compositions, measured by visual petrography.
    Keywords: 183-1138A; Aluminium; Carbon, mineral; Carbon, organic, total; Depth, corrected; DRILL; Drilling/drill rig; Hydrogen index, mass HC, per unit mass total organic carbon; Indian Ocean; Inductively coupled plasma - mass spectrometry (ICP-MS); Iron; Joides Resolution; Leg183; Lithium; Magnesium; major elements; Manganese; Measured on decarbonated sediments; Molybdenum; molybdenum isotopes; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Oceanic Anoxic Event 2; ODP Site 1138; Oxygen index, mass CO2, per unit mass total organic carbon; redox; Rock eval pyrolysis (Behar et al., 2001); Rubidium; Sample code/label; Sample comment; Sodium; Temperature, in rock/sediment, maximum; trace metals; Uranium; δ13C, organic carbon; δ98/95Mo; δ98/95Mo, error
    Type: Dataset
    Format: text/tab-separated-values, 1959 data points
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  • 8
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    Micro-FTIR and py-GC-MS data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (2019)
    PANGAEA
    In:  Supplement to: Versteegh, Gerard J M; Houben, Alexander J P; Zonneveld, Karin A F (in review): Better molecular preservation of organic matter in an oxic than in a sulphidic depositional environment: evidence from of Thalassiphora pelagica (Dinoflagellata, Eocene) cysts. Biogeosciences Discussions, https://doi.org/10.5194/bg-2019-373
    Details
    Publication Date: 2024-01-09
    Description: This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.
    Keywords: Biopolymer; Cyst; Diagenesis; Dinoflagellate; Geopolymer; Infrared Spectroscopy; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sulphurization
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    Processed and raw data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Description: This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.
    Keywords: 120-748B; Biopolymer; Cyst; Diagenesis; Dinoflagellate; DRILL; Drilling/drill rig; File format; File name; File size; Geopolymer; Infrared Spectroscopy; Joides Resolution; Leg120; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sample code/label; South Indian Ridge, South Indian Ocean; Sulphurization; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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  • 10
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    Diatom carbon isotope data and CO2 reconstruction from ODP Site 145-882 through the late Pliocene (2018)
    PANGAEA
    In:  Supplement to: Swann, George E A; Kendrick, Christopher P; Dickson, Alexander J; Worne, Savannah (2018): Late Pliocene Marine ρCO₂ Reconstructions From the Subarctic Pacific Ocean. Paleoceanography and Paleoclimatology, 33(5), 457-469, https://doi.org/10.1029/2017PA003296
    Details
    Publication Date: 2024-01-09
    Description: The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to initiate this cooling and the onset of major Northern Hemisphere glaciation, reductions in atmospheric concentrations of CO2 likely played a key role. The emergence of a stratified (halocline) water column in the subarctic north-west Pacific Ocean at 2.73 Ma has often been interpreted as an event which would have limited oceanic ventilation of CO2 to the atmosphere, thereby helping to cool the global climate system. Here, diatom carbon isotopes (δ13Cdiatom) are used to reconstruct changes in regional carbon dynamics through this interval. Results show that the development of a salinity stratification did not fundamental alter the net oceanic/atmospheric flux of CO2 in the subarctic north-west Pacific Ocean through the late Pliocene/early Quaternary. These results provide further insights into the long-term controls on global carbon cycling and the role of the subarctic Pacific Ocean in instigating global climatic changes.
    Keywords: 145-882A; 145-882B; AGE; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure, standard deviation; Coscinodiscus marginatus; Coscinodiscus radiatus; Diatoms, other; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg145; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; δ13C, diatom-bound organic matter
    Type: Dataset
    Format: text/tab-separated-values, 217 data points
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