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  • Data  (4)
  • 2005-2009  (1)
  • 1980-1984  (3)
  • 1955-1959
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Year
  • 1
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    Unknown
    Analysis of 10Be and Th isotopes in manganese nodules (1982)
    PANGAEA
    In:  Supplement to: Krishnaswami, Seth; Mangini, Augusto; Thomas, J H; Sharma, P; Cochran, J Kirk; Turekian, Karl K; Parker, P D (1982): 10Be and Th isotopes in manganese nodules and adjacent sediments: Nodule growth histories and nuclide behavior. Earth and Planetary Science Letters, 59(2), 217-234, https://doi.org/10.1016/0012-821X(82)90127-3
    Details
    Publication Date: 2023-08-28
    Description: The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth distribution in the top 20 mm of these deposits. Accumulation rates have been obtained in the range of 1 to 4 mm/Ma, which are in good agreement with rates determined using the 230Th method on the same nodules. The use of 10Be offers promise in extending the dating to the outer few cm of the nodules. This contrasts with conventional methods using 230Th and 231Pa isotopes which, due to their comparatively short half lives, are limited to a few mm at the surface of the nodules. Detailed studies of 10Be in the manganese deposits coupled with other trace element analyses should prove valuable in understanding the processes of formation of these deposits and the chronology of events recorded by them.
    Keywords: ARRH-TF; BC; Box corer; DOMES-A47-16; Dredge; DRG; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 2
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    Unknown
    (Tables 1 to 3, pages 221-222) Th isotope data for three manganese nodules of the Pacific Ocean (1982)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: Alpha spectrometry; ARRH-TF; BC; Box corer; Deposit type; DEPTH, sediment/rock; DISTANCE; Distance, maximum; Distance, minimum; DOMES-A47-16; Dredge; DRG; Event label; Identification; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Thorium-227; Thorium-227, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: text/tab-separated-values, 334 data points
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    DATA PANGAEA
  • 3
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    Unknown
    (Table 4, pages 222) Be isotope data for three manganese nodules of the Pacific Ocean (1982)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: ARRH-TF; BC; Beryllium-10, standard deviation; Beryllium-10 decay; Beryllium-9; Box corer; Deposit type; DEPTH, sediment/rock; DISTANCE; Distance, maximum; Distance, minimum; DOMES-A47-16; Dredge; DRG; Event label; Identification; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: text/tab-separated-values, 125 data points
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    DATA PANGAEA
  • 4
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    Unknown
    Uranium, Thorium and Protactinium isotopes of ODP Site 172-1063 (2009)
    PANGAEA
    In:  Supplement to: Lippold, Jörg; Gruetzner, Jens; Winter, Diane M; Lahaye, Yann; Mangini, Augusto; Christl, Marcus (2009): Does sedimentary 231Pa/230Th from the Bermuda Rise monitor past Atlantic Meridional Overtuning Circulation? Geophysical Research Letters, 36, L12601, https://doi.org/10.1029/2009GL038068
    Details
    Publication Date: 2024-01-09
    Description: Ocean circulation may have undergone reductions and reinvigorations in the past closely tied to regional climate changes. Measurements of 231Pa/230Th ratios in a sediment core from the Bermuda Rise have been interpreted as evidence that the Atlantic Meridional Overturning Circulation (AMOC) was weakened or completely eliminated during a period of catastrophic iceberg discharges (Heinrich-Event 1, H1). Here we present new data from the Bermuda Rise that show further 231Pa/230Th peaks during Heinrich-2 (H2) and Heinrich-3 (H3). Additionally, a tight correlation between diatom abundances (biogenic silica) and 231Pa/230Th is discovered in this core. Our results redirect the interpretation of 231Pa/230Th from the Bermuda Rise as a proxy for ocean circulation towards a proxy that reacts highly sensitive to changes of particle composition and water mass properties.
    Keywords: 172-1063B; 172-1063D; AGE; Blake-Bahama Outer Ridge, North Atlantic Ocean; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Inductively coupled plasma - mass spectrometry (ICP-MS); Joides Resolution; Leg172; Ocean Drilling Program; ODP; Protactinium-231; Protactinium-231, error, relative; Protactinium-231/Thorium-230 excess, decay-corrected; Protactinium-231/Thorium-230 excess, decay-corrected, error, relative; Sample code/label; South Atlantic Ocean; Thorium-230; Thorium-230, error, relative; Thorium-232; Thorium-232, error, relative; Uranium-234; Uranium-234, error, relative; Uranium-238; Uranium-238, error, relative
    Type: Dataset
    Format: text/tab-separated-values, 748 data points
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    DATA PANGAEA
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