Spatial and temporal trends in exhumation of the Eastern Himalaya and syntaxis as determined from a multi-technique detrital thermochronological study of the Bengal Fan

Najman, Yanina Manya Rachel and Mark, Chris and Barfod, Dan and Carter, Andy and Parrish, Randy and Chew, David and Gemignani, Lorenzo (2019) Spatial and temporal trends in exhumation of the Eastern Himalaya and syntaxis as determined from a multi-technique detrital thermochronological study of the Bengal Fan. Geological Society of America Bulletin, 131 (9-10). pp. 1607-1622. ISSN 0016-7606

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Abstract

The Bengal Fan provides a Neogene record of Eastern and Central Himalaya exhumation. We provide the first detrital thermochronological study (apatite and rutile U-Pb, mica Ar-Ar, zircon fission track) of sediment samples collected during International Ocean Discovery Program (IODP) Expedition 354 to the mid-Bengal Fan. Our data from rutile and zircon fission-track thermochronometry show a shift in lag times over the interval 5.59-3.47 Ma. The oldest sample with a lag time of 6 m.y.) has a depositional age of 5.594.50 Ma, and the zircon and rutile populations then show a static peak until >12 Ma. This interval, from 5.59-4.50 Ma to >12 Ma, is most easily interpreted as recording passive erosion of the Greater Himalaya. However, single grains with lag times of

Item Type:
Journal Article
Journal or Publication Title:
Geological Society of America Bulletin
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1907
Subjects:
ID Code:
133120
Deposited By:
Deposited On:
23 Apr 2019 10:55
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 05:13