Understanding Himalayan erosion and the significance of the Nicobar Fan

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doi: 10.1016/j.epsl.2017.07.019
Author(s): McNeill, Lisa C.; Dugan, Brandon; Backman, Jan; Pickering, Kevin T.; Pouderoux, Hugo F. A.; Henstock, Timothy J.; Petronotis, Katerina E.; Carter, Andrew; Chemale, Farid, Jr.; Milliken, Kitty L.; Kutterolf, Steffen; Mukoyoshi, Hideki; Chen Wenhuang; Kachovich, Sarah; Mitchison, Freya L.; Bourlange, Sylvain; Colson, Tobias A.; Frederik, Marina C. G.; Guèrin, Gilles; Hamahashi, Mari; House, Brian M.; Hüpers, Andre; Jeppson, Tamara N.; Kenigsberg, Abby R.; Kuranaga, Mebae; Nair, Nisha; Owari, Satoko; Shan Yehua; Song, Insun; Torres, Marta E.; Vannucchi, Paola; Vrolijk, Peter J.; Yang Tao; Zhao, Xixi; Thomas, Ellen
Author Affiliation(s): Primary:
University of Southampton, National Oceanography Centre, Southampton, United Kingdom
Colorado School of Mines, United States
Stockholm University, Sweden
University College London, United Kingdom
University de Rennes I, France
Texas A&M University, United States
Birkbeck College, United Kingdom
Universidade do Vale do Rio dos Sinos, Brazil
University of Texas at Austin, United States
GEOMAR-Helmholtz Center for Ocean Research Kiel, Germany
Shimane University, Japan
Chinese Academy of Sciences, Key Laboratory of Marginal Sea Geology, China
University of Queensland, Australia
Cardiff University, United Kingdom
Université de Lorraine, France
University of Western Australia, Australia
Geostech, Indonesia
Lamont-Doherty Earth Observatory, United States
Japanese Geological Survey, Japan
University of California at San Diego, United States
University of Bremen, Germany
University of Wisconsin at Madison, United States
Pennsylvania State University, United States
Yamaguchi University, Japan
National Centre for Antarctic and Ocean Research, India
Chiba University, Japan
Korea Institute of Geoscience & Mineral, South Korea
Oregon State University, United States
Royal Holloway University of London, United Kingdom
New Mexico Institute of Mining and Technology, United States
China Earthquake Administration, China
University of California at Santa Cruz, United States
Yale University, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, Vol.475, p.134-142. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Includes appendix. 54 refs.; illus., incl. sketch map
Summary: 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.
Year of Publication: 2017
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Asia; Bay of Bengal; Bengal Fan; Cenozoic; Deep Sea Drilling Project; Erosion; Expedition 362; Far East; Himalayas; IODP Site U1480; IODP Site U1481; India; Indian Ocean; Indian Peninsula; Indonesia; International Ocean Discovery Program; Leg 116; Leg 22; Marine sedimentation; Miocene; Neogene; Nicobar Fan; Ninetyeast Ridge; Ocean Drilling Program; Paleoclimatology; Pliocene; Progradation; Provenance; Sediment supply; Sediment transport; Sedimentation; Sedimentation rates; Shillong Plateau; Submarine fans; Sumatra; Tectonics; Tertiary; Transport; Upper Miocene
Coordinates: N030202 N030202 E0913621 E0913621
Record ID: 2017082683
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands