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  • PANGAEA  (11)
  • AGU (American Geophysical Union)  (1)
  • American Physical Society
  • Nature Publishing Group
  • Sage
  • 2000-2004  (12)
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Keywords
Publisher
Years
Year
  • 1
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    Similar glacial and interglacial export bioproductivity in the Atlantic sector of the Southern Ocean: Multiproxy evidence and implications for atmospheric CO2 (2000)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 15 . pp. 642-658.
    Details
    Publication Date: 2019-07-02
    Description: We present time series of export productivity proxy data including 230Thex-normalized deposition rates (rain rates) of 10Be, dissolution-corrected biogenic Ba, and biogenic opal as well as authigenic U concentrations which are complemented by rain rates of total (detrital) Fe and sea ice indicating diatom abundances from five sediment cores across the Atlantic sector of the Southern Ocean covering the past 150,000 years. The results suggest that 10Be rain rates and authigenic U concentration cannot serve as quantitative paleoproductivity proxies because they have also been influenced by detrital particle fluxes in the case of 10Be and bulk sedimentation rates (sediment focussing) and deep water oxygenation in the case of U. The combined results of the remaining productivity proxies of this study (rain rates of biogenic opal and biogenic Ba in those sections without authigenic U) and other previously published proxy data from the Southern Ocean (231Pa/230Th and nitrogen isotopes) suggest that a combination of sea ice cover, shallow remineralization depth, and stratification of the glacial water column south of the present position of the Antarctic Polar Front and possibly Fe fertilization north of it have been the main controlling factors of export paleoproductivity in the Southern Ocean over the last 150,000 years. An overall glacial increase of export paleoproductivity is not supported by the data, implying that bioproductivity variations in the Southern Ocean are unlikely to have contributed to the major glacial atmospheric CO2 drawdown observed in ice cores.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 2
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    Radionuclide concentrations, ratios, and derived ages of massive sulfides from ODP Leg 139 and Leg 169 sites (2000)
    PANGAEA
    In:  Supplement to: Scholten, Jan Christoph; Lackschewitz, Klas Sven; Marchig, Vesna; Stoffers, Peter; Mangini, Augusto (2000): 230Th/234U and 231Pa/235U disequilibria in massive sulfides from the Bent Hill area (Legs 139 and 169). In: Zierenberg, RA; Fouquet, Y; Miller, DJ; Normark, WR (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 169, 1-15, https://doi.org/10.2973/odp.proc.sr.169.108.2000
    Details
    Publication Date: 2024-01-09
    Description: Massive sulfide samples from the Bent Hill area were analyzed for 230Th/234U and 231Pa/235U disequilibria. Apparent ages calculated from these ratios are between 8.2 and 〉300 ka. Concordant ages were found for only three samples that originate near the surface from the clastic sulfide zone and suggest "true" ages of between 8.5 and 16.0 ka (mean of 230Th and 231Pa ages). The uranium vs. depth distribution in the Bent Hill Massive Sulfide deposit suggests an open system for uranium for the deeper part of the deposit, which was probably caused by extensive recrystallization processes inhibiting true age determinations.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 3
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    (Table T2) Radionuclide ratios and derived ages of massive sulfides from ODP Leg 139 and Leg 169 sites (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 139-856D; 139-856G; 139-856H; 169-1035C; 169-1035D; 169-1035F; 169-1035G; 169-1035H; Age, 231Pa/235U Proactinium-Uranium; Age, dated; Age, dated standard deviation; Age, Uranium-Thorium; Dead Dog vent field, North Pacific Ocean; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Joides Resolution; Latitude of event; Leg139; Leg169; Longitude of event; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Protactinium-231/Uranium-235 ratio; Protactinium-231/Uranium-235 ratio, standard deviation; Sample code/label; Thorium-230/Uranium-234 ratio; Thorium-230/Uranium-234 ratio, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 238 data points
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    DATA PANGAEA
  • 4
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    (Table T1) Thorium, uranium and protactinium concentrations in ODP Leg 139 and Leg 169 sites (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 139-856D; 139-856G; 139-856H; 169-1035C; 169-1035D; 169-1035F; 169-1035G; 169-1038H; Dead Dog vent field, North Pacific Ocean; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elevation of event; Escanaba Trough, North Pacific Ocean; Event label; Joides Resolution; Latitude of event; Leg139; Leg169; Longitude of event; Mineral assemblage; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Protactinium-231; Protactinium-231, standard deviation; Radionuclide determination (Anderson & Fleer, 1982); Sample code/label; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-238; Uranium-238, standard deviation; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 339 data points
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    DATA PANGAEA
  • 5
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    Radionuclides in sediment cores of the Atlantic sector of the Southern Ocean (2000)
    PANGAEA
    In:  Supplement to: Frank, Martin; Gersonde, Rainer; Rutgers van der Loeff, Michiel M; Bohrmann, Gerhard; Nürnberg, Christine Caroline; Kubik, Peter W; Suter, Martin; Mangini, Augusto (2000): Similar glacial and interglacial export bioproductivity in the Atlantic sector of the Southern Ocean: multiproxy evidence and implications for atmospheric CO2. Paleoceanography, 15(6), 642-658, https://doi.org/10.1029/2000PA000497
    Details
    Publication Date: 2024-06-26
    Description: We present time series of export productivity proxy data including 230Thex-normalized deposition rates (rain rates) of 10Be, dissolution-corrected biogenic Ba, and biogenic opal as well as authigenic U concentrations which are complemented by rain rates of total (detrital) Fe and sea ice indicating diatom abundances from five sediment cores across the Atlantic sector of the Southern Ocean covering the past 150,000 years. The results suggest that 10Be rain rates and authigenic U concentration cannot serve as quantitative paleoproductivity proxies because they have also been influenced by detrital particle fluxes in the case of 10Be and bulk sedimentation rates (sediment focussing) and deep water oxygenation in the case of U. The combined results of the remaining productivity proxies of this study (rain rates of biogenic opal and biogenic Ba in those sections without authigenic U) and other previously published proxy data from the Southern Ocean (231Pa/230Th and nitrogen isotopes) suggest that a combination of sea ice cover, shallow remineralization depth, and stratification of the glacial water column south of the present position of the Antarctic Polar Front and possibly Fe fertilization north of it have been the main controlling factors of export paleoproductivity in the Southern Ocean over the last 150,000 years. An overall glacial increase of export paleoproductivity is not supported by the data, implying that bioproductivity variations in the Southern Ocean are unlikely to have contributed to the major glacial atmospheric CO2 drawdown observed in ice cores.
    Keywords: ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Giant box corer; GKG; Gravity corer (Kiel type); Marine Geochemistry @ AWI; Meteor Rise; MUC; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/278; PS16/284; PS16/311; PS1754-1; PS1754-2; PS1756-5; PS1756-6; PS1768-1; PS1768-8; SFB261; Shona Ridge; Silicon Cycling in the World Ocean; SINOPS; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 6
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    Radionuclids in sediment core PS1754-1 (2000)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, sediment, standard deviation; AGE; Alpha spectrometry; Aluminium; Aluminium oxide, rain rate; ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Barium, biogenic; Barium, biogenic rain rate; Beryllium-10; Beryllium-10, decay-corrected; Beryllium-10, rain rate; Calculated; Density, dry bulk; DEPTH, sediment/rock; Fractionation factor, error; Gas chromatography; Gravity corer (Kiel type); Iron; Iron, rain rate; Marine Geochemistry @ AWI; Meteor Rise; Opal, biogenic, rain rate; Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/278; PS1754-1; Sedimentation rate; Sedimentation rate, standard deviation; SFB261; Silicon Cycling in the World Ocean; SINOPS; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Uranium; Uranium-234; Uranium-238; Vertical rain rate; Vertical rain rate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1073 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Radionuclids in sediment core PS1756-5 (2000)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, sediment, standard deviation; AGE; Alpha spectrometry; Aluminium; Aluminium oxide, rain rate; ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Barium, biogenic; Barium, biogenic rain rate; Beryllium-10; Beryllium-10, decay-corrected; Beryllium-10, rain rate; Calculated; Density, dry bulk; DEPTH, sediment/rock; Fractionation factor, error; Gas chromatography; Gravity corer (Kiel type); Iron; Iron, rain rate; Marine Geochemistry @ AWI; Meteor Rise; Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/284; PS1756-5; Sedimentation rate; Sedimentation rate, standard deviation; SFB261; Silicon Cycling in the World Ocean; SINOPS; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Uranium; Uranium-234; Uranium-238; Vertical rain rate; Vertical rain rate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2426 data points
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    DATA PANGAEA
  • 8
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    Radionuclids in sediment core PS1754-2 (2000)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, sediment, standard deviation; AGE; Aluminium; Aluminium oxide, rain rate; ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Barium, biogenic; Barium, biogenic rain rate; Calculated; Density, dry bulk; DEPTH, sediment/rock; Fractionation factor, error; Gas chromatography; Giant box corer; GKG; Iron; Iron, rain rate; Marine Geochemistry @ AWI; Meteor Rise; Opal, biogenic, rain rate; Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/278; PS1754-2; Sedimentation rate; Sedimentation rate, standard deviation; SFB261; Silicon Cycling in the World Ocean; SINOPS; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Uranium; Uranium-234; Uranium-238; Vertical rain rate; Vertical rain rate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 174 data points
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    DATA PANGAEA
  • 9
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    Radionuclids in sediment core PS1756-6 (2000)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, sediment, standard deviation; AGE; Aluminium; Aluminium oxide, rain rate; ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Barium, biogenic; Barium, biogenic rain rate; Calculated; Density, dry bulk; DEPTH, sediment/rock; Fractionation factor, error; Gas chromatography; Iron; Iron, rain rate; Marine Geochemistry @ AWI; Meteor Rise; MUC; MultiCorer; Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/284; PS1756-6; Sedimentation rate; Sedimentation rate, standard deviation; SFB261; Silicon Cycling in the World Ocean; SINOPS; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Uranium; Uranium-234; Uranium-238; Vertical rain rate; Vertical rain rate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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    DATA PANGAEA
  • 10
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    Radionuclids in sediment core PS1768-1 (2000)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, sediment, standard deviation; AGE; Alpha spectrometry; Aluminium; Aluminium oxide, rain rate; ANT-VIII/3; AWI_MarGeoChem; AWI_Paleo; Barium, biogenic; Barium, biogenic rain rate; Beryllium-10; Beryllium-10, decay-corrected; Beryllium-10, rain rate; Calculated; Density, dry bulk; DEPTH, sediment/rock; Fractionation factor, error; Gas chromatography; Iron; Iron, rain rate; Marine Geochemistry @ AWI; MUC; MultiCorer; Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/311; PS1768-1; Sedimentation rate; Sedimentation rate, standard deviation; SFB261; Shona Ridge; Silicon Cycling in the World Ocean; SINOPS; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Uranium; Uranium-234; Uranium-238; Vertical rain rate; Vertical rain rate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 110 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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