Journal ArticleOpen Access
Os‐Sr‐Nd results from sediments in the Bay of Bengal: Implications for sediment transport and the marine Os record
Author Affiliations
Centre National de la Recherche Scientifique, Centre de Recherches Pétrographiques et Géochimiques, Université de Lorraine, Federal Institute for Geosciences and Natural Resources
Published InPaleoceanography
Year2001
Citations50
Abstract
Sr, Nd, and Os isotopic data are presented for sediments from diverse locations in the Bay of Bengal. These data allow the samples to be divided into three groups, related to their sedimentary contexts. The first group, mainly composed of sediments from the shelf off Bangladesh and the currently active fan, has Sr and Nd characteristics consistent with a dominantly Himalayan source. Their 187 Os/ 188 Os ratios (∼1.2‐1.5) show that the average detrital material delivered by the Ganga‐Brahmaputra (G‐B) river system is not unusually radiogenic. A large difference in 187 Os/ 188 Os ratio exists between these Bengal Fan sediments and Ganga bedloads ( 187 Os/ 188 Os ∼2.5, Pierson‐Wickmann et al. [2000]). This difference mainly reflects addition of…
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