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  • PANGAEA  (20)
  • 2015-2019  (20)
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  • 1
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    Palynological and geochemical results of middle Eocene sediments of ODP Hole 159-959D, equatorial Atlantic Ocean (2019)
    PANGAEA
    In:  Supplement to: Cramwinckel, Margot J; Van der Ploeg, Robin; Bijl, Peter K; Peterse, Francien; Bohaty, Steven M; Röhl, Ursula; Schouten, Stefan; Middelburg, Jack J; Sluijs, Appy (2019): Harmful algae and export production collapse in the equatorial Atlantic during the zenith of Middle Eocene Climatic Optimum warmth. Geology, 47(3), 247-250, https://doi.org/10.1130/G45614.1
    Details
    Publication Date: 2024-01-09
    Description: New palynological, sedimentological, and geochemical records spanning the Middle Eocene climatic optimum (MECO; ca. 40 Ma) in the equatorial Atlantic Ocean indicate that peak warming was associated with upper-ocean stratification, decreased export production, and possibly harmful algal blooms, followed by slight oxygen minimum zone expansion. Combining these findings with published MECO records suggests that export production collapse and benthos starvation during the zenith of MECO warmth were widespread in the Atlantic. Furthermore, comparison to records across the Paleocene-Eocene thermal maximum (ca. 56 Ma) at the same site suggests a similar system response to warming, but with different impact on benthic communities.
    Keywords: 159-959D; Eocene; MECO; Middle Eocene Climatic Optimum; Ocean Drilling Program; ODP; ODP Site 959
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 2
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    Late Oligocene XRF scanner data from IODP Site 318-U1356 Willkes Land Margin, Antarctica (2018)
    PANGAEA
    In:  Supplement to: Salabarnada, Ariadna; Escutia, Carlota; Röhl, Ursula; Nelson, C Hans; McKay, Robert M; Jiménez-Espejo, Francisco Jose; Bijl, Peter K; Hartman, Julian D; Strother, Stephanie L; Salzmann, Ulrich; Evangelinos, Dimitris; López-Quirós, Adrián; Flores, José Abel; Sangiorgi, Francesca; Ikehara, Minoru; Brinkhuis, Henk (2018): Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica – Part 1: Insights from late Oligocene astronomically paced contourite sedimentation. Climate of the Past, 14(7), 991-1014, https://doi.org/10.5194/cp-14-991-2018
    Details
    Publication Date: 2023-12-20
    Description: Antarctic ice sheet and Southern Ocean paleoceanographic configurations during the late Oligocene are not well resolved. They are however important to understand the influence of high-latitude Southern Hemisphere feedbacks on global climate under CO2 scenarios (between 400 and 750 ppm) projected by the IPCC for this century, assuming unabated CO2 emissions. Sediments recovered by the Integrated Ocean Drilling Program (IODP) at Site U1356, offshore of the Wilkes Land margin in East Antarctica, provide an opportunity to study ice sheet and paleoceanographic configurations during the late Oligocene (26-25 Ma). Our study, based on a combination of sediment facies analysis, magnetic susceptibility, density, and X-Ray Fluorescence geochemical data, shows that glacial and interglacial sediments are continuously reworked by bottom-currents, with maximum velocities occurring during the interglacial periods. Glacial sediments record poorly ventilated, low-oxygenation bottom water conditions, interpreted to result from a northward shift of westerly winds and surface oceanic fronts. Interglacial sediments record more oxygenated and ventilated bottom water conditions and strong current velocities, which suggests enhanced mixing of the water masses as a result of a southward shift of the Polar Front. Intervals with preserved carbonated nannofossils within some of the interglacial facies are interpreted to form under warmer paleoclimatic conditions when less corrosive warmer northern component water (e.g. North Atlantic sourced deep water) had a greater influence on the Site. Spectral analysis on the late Oligocene sediment interval show that the glacial-interglacial cyclicity and related displacements of the Southern Ocean frontal systems between 26-25 Ma were forced mainly by obliquity. The paucity of iceberg rafted debris (IRD) throughout the studied interval contrasts with earlier Oligocene and post-Miocene Climate Optimum sections from Site U1356 and with late Oligocene strata from the Ross Sea, which contain IRD and evidence for coastal glaciers and sea ice. These observations, supported by elevated sea surface paleotemperatures, the absence of sea-ice, and reconstructions of fossil pollen between 26 and 25 Ma at Site U1356, suggest that open ocean water conditions prevailed. Combined, these evidences suggest that glaciers or ice caps likely occupied the topographic highs and lowlands of the now marine Wilkes Subglacial Basin (WSB). Unlike today, the continental shelf was not over-deepened and thus ice sheets in the WSB were likely land-based and marine-based ice sheet expansion was likely limited to coastal regions.
    Keywords: 318-U1356A; Aluminium (peak area); Barium/Titanium ratio; Barium (peak area); Bromine/Titanium ratio; Calcium (peak area); Calcium carbonate; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Estimated; Exp318; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Manganese (peak area); Sample code/label; Silicon (peak area); Strontium (peak area); Wilkes Land; X-ray fluorescence core scanner (XRF); Zirconium/Barium ratio; Zirconium/Rubidium ratio; Zirconium/Titanium ratio; Zirconium (peak area)
    Type: Dataset
    Format: text/tab-separated-values, 27719 data points
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  • 3
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    Geochemistry of ODP Hole 159-959D spanning the Middle Eocene climatic optimum (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959D; AGE; Carbon, organic, total; Carbon, organic/Nitrogen, total ratio; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; Eocene; Gulf of Guinea; Joides Resolution; Leg159; MECO; Middle Eocene Climatic Optimum; Ocean Drilling Program; ODP; ODP Site 959; Sample code/label; δ13C, carbonate; δ13C, organic carbon; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 239 data points
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  • 4
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    Elemental composition of ODP Hole 159-959D spanning the Middle Eocene climatic optimum (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959D; AGE; Aluminium; Antimony; Barium; Cadmium; Calcium; Cerium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eocene; Gulf of Guinea; Iron; Joides Resolution; Lead; Leg159; Lithium; Magnesium; Manganese; MECO; Middle Eocene Climatic Optimum; Molybdenum; Nickel; Ocean Drilling Program; ODP; ODP Site 959; Phosphorus; Potassium; Sample code/label; Scandium; Sodium; Strontium; Sulfur, total; Titanium; Vanadium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 1073 data points
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  • 5
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    Palynology of ODP Hole 159-959D spanning the Middle Eocene climatic optimum (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959D; AGE; Areoligera complex; Batiacasphaera spp.; Cordosphaeridium complex; Dapsilidinium spp.; DEPTH, sediment/rock; Depth, top/min; Dinoflagellate cyst; Dinoflagellate cyst, peridinioids; Dinoflagellate cyst indeterminata; Dinoflagellate cyst per unit mass; Diphyes spp.; Distatodinium spp.; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Enneadocysta; Eocene; Foraminifera, linings per unit mass; Gulf of Guinea; Homotryblium spp.; Hystrichokolpoma spp.; Impagidinium spp.; Joides Resolution; Leg159; Lingulodinium spp.; MECO; Middle Eocene Climatic Optimum; Muratodinium spp.; Ocean Drilling Program; ODP; ODP Site 959; Operculodinium spp.; Pentadinium spp.; Phthanoperidinium spp.; Polysphaeridium spp.; Protoperidinioid cyst; Protoperidinioids; Sample code/label; Spiniferites complex; Tectatodinium pellitum
    Type: Dataset
    Format: text/tab-separated-values, 2627 data points
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  • 6
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    Carbon and carbon isotope ratios of sediment core Latrobe-1 (2018)
    PANGAEA
    Details
    Publication Date: 2024-04-25
    Keywords: Carbon, organic, total; Carbon/Nitrogen ratio; CDRILL; Core drilling; DEPTH, sediment/rock; Latrobe-1; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 147 data points
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  • 7
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    Carbon and carbon isotope ratios of outcrop sampling Point Margaret (2018)
    PANGAEA
    Details
    Publication Date: 2024-04-25
    Keywords: Calcium carbonate; Carbon, organic, total; Carbon/Nitrogen ratio; Comment; OUTCROP; Outcrop sample; Point_Margaret; SECTION, height; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 827 data points
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  • 8
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    Dinoflagellate cyst species of outcrop sampling Point Margaret (2018)
    PANGAEA
    Details
    Publication Date: 2024-04-25
    Keywords: Comment; Comment 2 (continued); Comment 3 (continued); OUTCROP; Outcrop sample; Plate; Point_Margaret; Species
    Type: Dataset
    Format: text/tab-separated-values, 182 data points
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  • 9
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    Dinoflagellate cysts in the Oligocene to Miocene sediments of IODP Site 318-U1356A (2017)
    PANGAEA
    In:  Supplement to: Bijl, Peter K; Houben, Alexander J P; Bruls, Anja; Pross, Jörg; Sangiorgi, Francesca (2018): Stratigraphic calibration of Oligocene–Miocene organic-walled dinoflagellate cysts from offshore Wilkes Land, East Antarctica, and a zonation proposal. Journal of Micropalaeontology, 37(1), 105-138, https://doi.org/10.5194/jm-37-105-2018
    Details
    Publication Date: 2024-04-25
    Description: There is growing interest in the scientific community in reconstructing the paleoceanography of the Southern Ocean during the Oligocene-Miocene because these time intervals experienced atmospheric CO2 concentrations with relevance to our future. However, it has remained notoriously difficult to put the sedimentary archives used in these efforts into a temporal framework. This is at least partially due to the fact that the bio-events recorded in organic-walled dinoflagellate cysts (dinocysts), which often represent the only microfossil group preserved, have not yet been calibrated to the international time scale. We here present dinocyst ranges from Oligocene-Miocene sediments drilled offshore the Wilkes Land continental margin, East Antarctica (Integrated Ocean Drilling Program (IODP) Hole U1356A). In addition, we apply statistical means to test a priori assumptions about whether the recorded taxa were deposited in situ or were reworked from older strata. Moreover, we describe two new dinocyst species, Selenopemphix brinkhuisii sp. nov. and Lejeunecysta adeliensis sp. nov., which are identified as important markers for regional stratigraphic analysis. Finally, we calibrate all identified dinocyst events to the international time scale using independent age control from calcareous nannoplankton and magnetostratigraphy from IODP Hole U1356A, and propose a provisional dinoflagellate cyst zonation scheme for the Oligocene-Miocene of the Southern Ocean.
    Keywords: 318-U1356A; Achilleodinium biformoides; Achomosphaera alcicornu; Acritarcha; Acritarcha, chorate; Acritarcha, microgranulate; Acritarcha, psilate sphere; Acritarcha, reticulate; Adnatosphaeridium sp.; Adnatosphaeridium spp.; Aiora fenestrata; Aireiana verrucosa; Alisocysta circumtabulata; Alterbidinium distinctum; Angiosperms; Apectodinium spp.; Arachnodinium antarcticum; Areoligera complex; Areoligera semicirculata; Ataxodinium spp.; Batiacasphaera; Batiacasphaera compta; Batiacasphaera hirsuta; Batiacasphaera micropapillata; Batiacasphaera minuta; Batiacasphaera sp.; Batiacasphaera sphaerica; Batiacasphaera spp.; Botryococcus; Brigantedinium complex; Brigantedinium pynei; Brigantedinium simplex; Brigantedinium sp.; Cerebrocysta bartonensis; Cerebrocysta delicata; Cerebrocysta sp.; Charlesdowniea clathrata; Charlesdowniea edwardsii; Cleistosphaeridium sp.; Cooksonidium capricornum; Cordosphaeridium fibrospinosum; Cordosphaeridium funiculatum; Cordosphaeridium minutum; Corrudinium; Corrudinium? labradori; Corrudinium incompositum; Corrudinium regulare; Corrudinium sp.; Counts; Cribroperidinium spp.; Cryodinium sp.; Cyclopsiella; Cymatiosphaera; Damassadinium crassimurata; Dapsilidinium spp.; Deflandrea antarctica; Deflandrea cygniformis; Deflandrea sp.; Deflandrea spp.; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dinoflagellate cyst; Dinoflagellate cyst indeterminata; Dinoflagellate cyst in situ; Dinoflagellate cyst per unit mass; Dinoflagellate cyst reworked; Diphyes colligerum; Distatodinium sp.; DRILL; Drilling/drill rig; Edwardsiella sexispinosa; Eisenackia circumtabulata; Elytrocysta brevis; Elytrocysta sp.; Enneadocysta diktyostila; Enneadocysta multicornuta; Eocladopyxis tesselata; Exp318; Fibrocysta axialis; Foraminifera, linings; Fossils, pyritized; Gelatia inflata; Glaphyrocysta intricata; Glaphyrocysta pastielsii; Habibacysta; Halodinium; Heteraulacacysta leptalea; Histiocysta palla; Homotryblium spp.; Hystrichokolpoma bullatum; Hystrichokolpoma pusilla; Hystrichokolpoma rigaudiae; Hystrichokolpoma truncatum; Hystrichosphaeridium truswelliae; Hystrichosphaeridium tubiferum; Hystrichosphaeropsis obscura; Impagidinium; Impagidinium aculeatum; Impagidinium cantabrigiense; Impagidinium elegans; Impagidinium elongatum; Impagidinium maculatum; Impagidinium pacificum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium spp.; Impagidinium velorum; Impagidinium victorianum; Impagidinium waipawaensis; Integrated Ocean Drilling Program / International Ocean Discovery Program; Invertocysta tabulata; IODP; Islandinium spp.; Joides Resolution; Kenleyia spp.; Leiosphera; Lejeunecysta acuminata; Lejeunecysta adeliense; Lejeunecysta attenuata; Lejeunecysta complex; Lejeunecysta cowei; Lejeunecysta fallax; Lejeunecysta katatonos; Lejeunecysta rotunda; Lithology/composition/facies; Lycopodium (added); Lycopodium (counted); Malvinia escutiana; Manumiella druggii; Melitasphaeridium pseudorecurvatum; Membranophoridium perforatum; Nematosphaeropsis; Nematosphaeropsis labyrinthus; Nothofagus; Octodinium askiniae; Odontochitina spp.; Oligokolpoma galeottii; Operculodinium; Operculodinium? eirikianum; Operculodinium cf. eirikianum; Operculodinium cf. tiara; Operculodinium janduchenei; Operculodinium piaseckii; Operculodinium sp.; Operculodinium spp.; Paleocystodinium golzowense; Palynomorpha; Paralacaniella; Paucisphaeridium spp.; Pediastrum; Phthanoperidinium amoenum; Phthanoperidinium antarcticum; Phthanoperidinium echinatum; Pollen; Pollen, bisaccate; Polysphaeridium spp.; Prasinophytes; Protoperidinioid cyst; Protoperidinium complex; Protoperidinium sp.; Pterospermella; Pyxidinopsis fairhavensis; Pyxidinopsis reticulata; Pyxidinopsis sp.; Pyxidinopsis spp.; Pyxidinopsis tuberculata; Pyxidinopsis vesciculata; Reticulatosphaera actinocoronata; Rhombodinium sp.; Sample code/label; Sample mass; Schematophora obscura; Schematophora speciosa; Selenopemphix antarctica; Selenopemphix brinkhuisi; Selenopemphix cf. antarctica; Selenopemphix complex; Selenopemphix dioneacysta; Selenopemphix nephroides; Selenopemphix sp.; Selenopemphix undulata; Senegalinium spp.; Spinidinium luciae; Spinidinium macmurdoense; Spinidinium schellenbergii; Spiniferites; Spiniferites ramosus complex; Spiniferites sp.; Spores; Stoveracysta kakanuiensis; Stoveracysta ornata; Svalbardella; Tasmanites; Tectatodinium spp.; Thalassiphora pelagica; Tritonites; Turbiosphaera filosa; Turbiosphaera sagena; Unipontedinium aquaeductus; Vozzhenikovia; Vozzhennikovia apertura/ S. schellenbergii group; Vozzhennikovia netrona; Wetzeliella articulata; Wilkes Land
    Type: Dataset
    Format: text/tab-separated-values, 63528 data points
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  • 10
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    Carbon, carbon isotope and dinoflagellate and pollen of the Latrobe-1 and Point Margaret, Victoria, Australia (2018)
    PANGAEA
    In:  Supplement to: Frieling, Joost; Huurdeman, Emiel P; Rem, Charlotte C M; Donders, Timme H; Pross, Jörg; Bohaty, Steven M; Holdgate, Guy R; Gallagher, Stephen John; McGowran, Brian; Bijl, Peter K (2018): Identification of the Paleocene?Eocene boundary in coastal strata in the Otway Basin, Victoria, Australia. Journal of Micropalaeontology, 37(1), 317-339, https://doi.org/10.5194/jm-37-317-2018
    Details
    Publication Date: 2024-04-25
    Description: Detailed, stratigraphically well-constrained environmental reconstructions are available for Paleocene and Eocene strata at a range of sites in the southwest Pacific Ocean (New Zealand and East Tasman Plateau; ETP) and Integrated Ocean Discovery Program (IODP) Site U1356 in the south of the Australo-Antarctic Gulf (AAG). These reconstructions have revealed a large discrepancy between temperature proxy data and climate models in this region, suggesting a crucial error in model, proxy data or both. To resolve the origin of this discrepancy, detailed reconstructions are needed from both sides of the Tasmanian Gateway. Paleocene-Eocene sedimentary archives from the west of the Tasmanian Gateway have unfortunately remained scarce (only IODP Site U1356), and no well-dated successions are available for the northern sector of the AAG. Here we present new stratigraphic data for upper Paleocene and lower Eocene strata from the Otway Basin, southeast Australia, on the (north)west side of the Tasmanian Gateway. We analyzed sediments recovered from exploration drilling (Latrobe-1 drill core) and outcrop sampling (Point Margaret) and performed high-resolution carbon isotope geochemistry of bulk organic matter and dinoflagellate cyst (dinocyst) and pollen biostratigraphy on sediments from the regional lithostratigraphic units, including the Pebble Point Formation, Pember Mudstone and Dilwyn Formation. Pollen and dinocyst assemblages are assigned to previously established Australian pollen and dinocyst zonations and tied to available zonations for the SW Pacific. Based on our dinocyst stratigraphy and previously published planktic foraminifer biostratigraphy, the Pebble Point Formation at Point Margaret is dated to the latest Paleocene. The globally synchronous negative carbon isotope excursion that marks the Paleocene-Eocene boundary is identified within the top part of the Pember Mudstone in the Latrobe-1 borehole and at Point Margaret. However, the high abundances of the dinocyst Apectodinium prior to this negative carbon isotope excursion prohibit a direct correlation of this regional bio-event with the quasi-global Apectodinium acme at the Paleocene-Eocene Thermal Maximum (PETM; 56 Ma). Therefore, the first occurrence of the pollen species Spinizonocolpites prominatus and the dinocyst species Florentinia reichartii are here designated as regional markers for the PETM. In the Latrobe-1 drill core, dinocyst biostratigraphy further indicates that the early Eocene (~56-51 Ma) sediments are truncated by a ~10 Myr long hiatus overlain by middle Eocene (~40 Ma) strata. These sedimentary archives from southeast Australia may prove key in resolving the model-data discrepancy in this region, and the new stratigraphic data presented here allow for detailed comparisons between paleoclimate records on both sides of the Tasmanian Gateway.
    Type: Dataset
    Format: application/zip, 5 datasets
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