Sr^|^ndash;Nd isotope composition of the Bay of Bengal sediments: Impact of climate on erosion in the Himalaya

• TRIPATHY GYANA RANJAN

  Geosciences Division, Physical Research Laboratory

• SINGH SUNIL KUMAR

  Geosciences Division, Physical Research Laboratory

• BHUSHAN RAVI

  Geosciences Division, Physical Research Laboratory

• RAMASWAMY V.

  National Institute of Oceanography

書誌事項

タイトル別名

• Sr–Nd isotope composition of the Bay of Bengal sediments: Impact of climate on erosion in the Himalaya

抄録

A temporal high-resolution analysis of Sr–Nd isotopic composition, Fe, Al and V concentration and magnetic susceptibility (MS) has been carried out in a sediment core from the western Bay of Bengal to trace sediment sources. Significant variations in the Sr and Nd isotopic composition and corresponding MS and elemental Fe/Al and V/Al ratios are observed in the sediment core with depth (time) indicating variable contributions from sources. The observed changes in the sediment provenance correlate well with the climatic record of the region, highlighting the important influence of climate over erosion. Relatively lower ⁸⁷Sr/⁸⁶Sr and higher ε_Nd corresponding to the Last Glacial Maximum (LGM) suggests proportionally reduced sediment contribution from the Himalaya. Erosion rate over the Himalaya decreased during LGM due to combined influence of reduced intensity of the southwest monsoon and larger extent of glaciations over the Higher Himalaya, the main source of sediments to the Bay of Bengal.

収録刊行物

• ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ

  ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ 45 (3), 175-186, 2011

  一般社団法人日本地球化学会

キーワード

• Himalaya
• Bay of Bengal
• erosion
• climate
• Sr–Nd isotopes

詳細情報

• CRID: 1390282679529081984
• NII論文ID: 10029325237
• NII書誌ID: AA00654975
• DOI: 10.2343/geochemj.1.0112
• COI: 1:CAS:528:DC%2BC3MXptlSjsbY%3D
• ISSN: 18805973
• ISSN: 00167002
• NDL書誌ID: 11147503
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11147503
• Web Site: https://www.jstage.jst.go.jp/article/geochemj/45/3/45_1.0112/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
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• 抄録ライセンスフラグ: 使用不可