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  • Forschungsdaten  (2)
  • 165-1002; Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated material; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; Cayman Rise, Caribbean Sea; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg165; Ocean Drilling Program; ODP; Sample code/label; Δ14C; Δ14C, standard deviation  (1)
  • 86-576; 86-576B; 86-578; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9, standard deviation; Beryllium-10/Beryllium-9 ratio; Calcium carbonate; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Leg86; North Pacific; Sample code/label; see reference(s)  (1)
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  • Forschungsdaten  (2)
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  • 1
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    (Table 1) 10 Beryllium and CaCO3 at DSDP Holes 86-576B, 86-576, and 86-578
    PANGAEA
    In:  Supplement to: Ku, Teh-Lung; Southon, John R; Vogel, John S; Liang, Z C; Kusakabe, M; Nelson, D Erle (1985): 10Be distributions in Deep Sea Drilling Project Site 576 and Site 578 sediments studied by accelerator mass spectrometry. In: Heath GR; Burckle LH; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 86, 539-546, https://doi.org/10.2973/dsdp.proc.86.122.1985
    Details
    Publikationsdatum: 2023-06-27
    Beschreibung: Extension of the 10Be geochronology for deep-sea sediments beyond the limit of late Pliocene age found in published works has been attempted. The results obtained on sediments from Deep Sea Drilling Project (DSDP) Sites 576 and 578 of Leg 86 suggest the feasibility of dating sediments as old as 12 to 15 m.y. At both sites, there have been large changes in sedimentation rate, with the Pleistocene sediments accumulating several times faster than those of the Pliocene, which in turn were deposited several times more rapidly than the late Miocene sediments. The Pleistocene-Pliocene section is considerably thicker in Hole 578 than in Hole 576B: the respective depths for the 7 m.y. time boundary in the two holes are about 125 and about 25 m. These 10Be-based age estimates are in agreement with the paleomagnetic stratigraphies established for the two sites. The suggested enhancement in the oceanic deposition of 10Be before 7 to 9 m.y. ago, as noticed in manganese crusts, has found tentative support from the present sedimentary records. A preliminary search for 10Be production variation during a geomagnetic field reversal has been conducted. In Hole 578, an enhanced 10Be concentration is found in a sample close to the Brunhes/Matuyama reversal boundary. More detailed and systematic measurements are required to confirm this observation, which bears on the detailed behavior of the geomagnetic field during the reversal.
    Schlagwort(e): 86-576; 86-576B; 86-578; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9, standard deviation; Beryllium-10/Beryllium-9 ratio; Calcium carbonate; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Leg86; North Pacific; Sample code/label; see reference(s)
    Materialart: Dataset
    Format: text/tab-separated-values, 201 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 2
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    Unbekannt
    (Table S1) Age determination of ODP Site 165-1002 (2004)
    PANGAEA
    In:  Supplement to: Hughen, Konrad A; Lehman, Scott J; Southon, John R; Overpeck, Jonathan T; Marchal, Olivier; Herring, C; Turnbull, J (2004): 14C Activity and Global Carbon Cycle Changes over the Past 50,000 Years. Science, 303(5655), 202-207, https://doi.org/10.1126/science.1090300
    Details
    Publikationsdatum: 2024-01-09
    Beschreibung: A series of 14C measurements in Ocean Drilling Program cores from the tropical Cariaco Basin, which have been correlated to the annual-layer counted chronology for the Greenland Ice Sheet Project 2 (GISP2) ice core, provides a high-resolution calibration of the radiocarbon time scale back to 50,000 years before the present. Independent radiometric dating of events correlated to GISP2 suggests that the calibration is accurate. Reconstructed 14C activities varied substantially during the last glacial period, including sharp peaks synchronous with the Laschamp and Mono Lake geomagnetic field intensity minimal and cosmogenic nuclide peaks in ice cores and marine sediments. Simulations with a geochemical box model suggest that much of the variability can be explained by geomagnetically modulated changes in 14C production rate together with plausible changes in deep-ocean ventilation and the global carbon cycle during glaciation.
    Schlagwort(e): 165-1002; Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated material; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; Cayman Rise, Caribbean Sea; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg165; Ocean Drilling Program; ODP; Sample code/label; Δ14C; Δ14C, standard deviation
    Materialart: Dataset
    Format: text/tab-separated-values, 3013 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
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