Pickering, KT;
(2017)
Understanding Himalayan erosion and the significance of the Nicobar Fan.
Earth and Planetary Science Letters
, 475
pp. 134-142.
10.1016/j.epsl.2017.07.019.
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Abstract
A holistic view of the Bengal–Nicobar Fan system requires sampling the full sedimentary section of the Nicobar Fan, which was achieved for the first time by International Ocean Discovery Program (IODP) Expedition 362 west of North Sumatra. We identified a distinct rise in sediment accumulation rate (SAR) beginning ∼9.5 Ma and reaching 250–350 m/Myr in the 9.5–2 Ma interval, which equal or far exceed rates on the Bengal Fan at similar latitudes. This marked rise in SAR and a constant Himalayan-derived provenance necessitates a major restructuring of sediment routing in the Bengal–Nicobar submarine fan. This coincides with the inversion of the Eastern Himalayan Shillong Plateau and encroachment of the west-propagating Indo–Burmese wedge, which reduced continental accommodation space and increased sediment supply directly to the fan. Our results challenge a commonly held view that changes in sediment flux seen in the Bengal–Nicobar submarine fan were caused by discrete tectonic or climatic events acting on the Himalayan–Tibetan Plateau. Instead, an interplay of tectonic and climatic processes caused the fan system to develop by punctuated changes rather than gradual progradation.
| Type: | Article |
|---|---|
| Title: | Understanding Himalayan erosion and the significance of the Nicobar Fan |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.epsl.2017.07.019 |
| Publisher version: | http://dx.doi.org/10.1016/j.epsl.2017.07.019 |
| Language: | English |
| Additional information: | © 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Bengal–Nicobar Fan; submarine fan; Himalayan tectonics; Asian monsoon; Indian Ocean |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1570391 |
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