Neogene and late Paleogene record of Himalayan orogeny and climate:A transect across the Middle Bengal Fan

France-Lanord, Christian and Spiess, Volkhard and Schwenk, Tilmann and Klaus, Adam and Adhikari, Rishi R. and Adhikari, Swostik K. and Bahk, Jang Jun and Baxter, Alan T. and Cruz, Jarrett W. and Das, Supriyo Kumar and Dekens, Petra and Duleba, Wania and Fox, Lyndsey R. and Galy, Albert and Galy, Valier and Ge, Junyi and Gleason, James D. and Gyawali, Babu R. and Huyghe, Pascale and Jia, Guodong and Lantzsch, Hendrik and Manoj, M. C. and Martin, Yasmina Martos and Meynadier, Laure and Najman, Yani M.R. and Nakajima, Arata and Ponton, Camilo and Reilly, Brendan T. and Rogers, Kimberly G. and Savian, Jairo F. and Selkin, Peter A. and Weber, Michael E. and Williams, Trevor and Yoshida, Koki (2015) Neogene and late Paleogene record of Himalayan orogeny and climate:A transect across the Middle Bengal Fan. Integrated Ocean Drilling Program: Preliminary Reports (354). pp. 1-46. ISSN 1932-9423

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International Ocean Discovery Expedition 354 to 8°N in the Bay of Bengal drilled a seven site, 320 km long transect across the Bengal Fan. Three deep-penetration and an additional four shallow holes give a spatial overview of the primarily turbiditic depositional system that comprises the Bengal deep-sea fan. Sediments originate from Himalayan rivers, documenting terrestrial changes of Himalayan erosion and weathering, and are transported through a delta and shelf canyon, supplying turbidity currents loaded with a full spectrum of grain sizes. Mostly following transport channels, sediments deposit on and between levees while depocenters laterally shift over hundreds of kilometers on millennial timescales. During Expedition 354, these deposits were documented in space and time, and the recovered sediments have Himalayan mineralogical and geochemical signatures relevant for reconstructing time series of erosion, weathering, and changes in source regions, as well as impacts on the global carbon cycle. Miocene shifts in terrestrial vegetation, sediment budget, and style of sediment transport were tracked. Expedition 354 has extended the record of early fan deposition by 10 My into the late Oligocene.

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Journal Article
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Integrated Ocean Drilling Program: Preliminary Reports
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13 Sep 2018 14:14
Last Modified:
16 Sep 2023 01:46