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  • Other Sources  (2)
  • AGU (American Geophysical Union)  (1)
  • Marine Technology Society and American Society of Limnology and Oceanography  (1)
  • 2010-2014
  • 1965-1969  (2)
  • 1965  (2)
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  • Other Sources  (2)
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  • 2010-2014
  • 1965-1969  (2)
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  • 1
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    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research, 70 (14). pp. 3457-3474.
    Publication Date: 2017-12-21
    Description: The possibility of using the 15% excess U234 activity in oceanic uranium for dating pelagic sediments in the age range 100,000 years to more than 1 m.y. has been explored. Results from a series of analyses of bulk samples, mechanical separates, and acid leach fractions indicate that separation of authigenic uranium from detrital uranium by either mechanical or chemical means is impractical. Measurements on totally dissolved samples reveal that the sediments do not form a closed system; post-depositional migration of U234 in the sedimentary column takes place. Based on the experimental data obtained from three red-clay cores with sedimentation rates ranging from 2 to 6 mm/1000 yr, a model depicting diffusion of the U234 generated within the sediments is proposed. The diffusion equation includes three parameters: sedimentation rate, diffusion coefficient for U234, and fraction of the internally produced U234 subject to mobility. If the amount of U234 lost from these cores is typical, a sizeable part of the U234 excess in the sea must be from this source.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Marine Technology Society and American Society of Limnology and Oceanography
    In:  In: Ocean science and ocean engineering : transactions of the joint conference and exhibit 14-17 June 1965, Washington, D.C. Marine Technology Society and American Society of Limnology and Oceanography, Washington, DC, USA, pp. 498-503.
    Publication Date: 2013-03-19
    Type: Book chapter , NonPeerReviewed
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