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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/25440
Title: Rapid lake level fall in Pangong Tso (lake) in Ladakh, NW Himalaya: a response of late Holocene aridity
Authors: Srivastava, P.
Kumar A.
Singh R.
Deepak O.
Kumar A.M.
Ray Y.
Jayangondaperumal R.
Phartiyal B.
Chahal P.
Sharma P.
Ghosh R.
Kumar N.
Agnihotri R.
Published in: Current Science
Abstract: Pangong Tso is a brackish water lake that lies along Pangong strand of the Karakoram strike-slip fault in arid Trans Himalayan region. The geomorphic mapping along the periphery of the lake suggested the presence of four palaeolake level strands located at 6, 4.8, 3.8 and 1.25 m above the present lake level. The gullied periphery expose relict deltaic sediments where sedimentological study enabled us to identify four deltaic lobes that make a classic Gilbert-type delta with well-developed top-set, fore-set and bottom-set. The top-set of the stratigraphically oldest delta lobe that corresponds to the highest lake level shows the presence of freshwater molluscs identified as Radix and a burnt sediment layer (hearth). The charcoal derived from this layer yielded 14C date as 1.7 ka bp and six luminescence ages from different delta lobes suggested that delta evolution and lake level fall of ∼6 m took place between ∼2-1 ka. Review of palaeoclimate record available from NW Himalaya and Pangong Tso suggests that late Holocene aridity might be responsible for this rapid lake level fall. Sclerochronological analysis carried out on 54 subsamples from three Radix specimens suggested that the modern type of seasonal conditions may have prevailed at ∼1.7 ka bp. © 2020. All Rights Reserved.
Citation: Current Science, 119(2): 219-231
URI: https://doi.org/10.18520/cs/v119/i2/219-231
http://repository.iitr.ac.in/handle/123456789/25440
Issue Date: 2020
Publisher: Indian Academy of Sciences
Keywords: Ladakh Himalaya
Lake-Delta
Late Holocene aridity
Pangong Tso
Sclerochronological analysis
ISSN: 113891
Author Scopus IDs: 57202563023
57217223372
57215037950
57222485764
55658056016
26423333100
13403823400
56221828500
57222477849
57212203865
57192102625
57211929526
7003786719
Author Affiliations: Srivastava, P., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India
Kumar, A., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India
Singh, R., Birbal Sahni Institute of Palaeosciences, Lucknow, 226 007, India
Deepak, O., Department of Geology, Lucknow University, Lucknow, 226 007, India
Kumar, A.M., Department of Geology, Lucknow University, Lucknow, 226 007, India
Ray, Y., National Centre for Polar and Ocean ResearchGoa 403 802, India
Jayangondaperumal, R., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India
Phartiyal, B., Birbal Sahni Institute of Palaeosciences, Lucknow, 226 007, India
Chahal, P., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India, Department of Geology, HNB Garhwal University, Srinagar, 249 161, India
Sharma, P., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India
Ghosh, R., Wadia Institute of Himalayan Geology, Dehradun, 248 001, India
Kumar, N., Department of Geology, HNB Garhwal University, Srinagar, 249 161, India
Agnihotri, R., Birbal Sahni Institute of Palaeosciences, Lucknow, 226 007, India
Funding Details: We acknowledge the Directors of our respective organizations for providing support. Field mapping was done during a field training course funded by Department of Science and Technology, New Delhi via grant Project# SR/FTP/ES-41/2012. Wild Life Authorities and DC, Leh are acknowledged for extending necessary permissions to work in the area. Dr Navin Juyal is acknowledged for helping in the field. Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी: SR/FTP/ES-41/2012
Corresponding Author: Srivastava, P.; Wadia Institute of Himalayan GeologyIndia; email: pradeep@wihg.res.in
Appears in Collections:Journal Publications [ES]

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