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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6304
Title: Cooling and exhumation of the Trans-Himalayan Ladakh batholith as constrained by fission track apatite and zircon ages
Authors: Kumar R.
Lal N.
Singh, Sandeep
Jain A.K.
Published in: Current Science
Abstract: Low-temperature thermochronology of the Trans-Himalayan Ladakh batholith has been applied, using fission track (FT) dating of apatite and zircon separates, to work out the exhumation history. Thirty FT apatite samples from the Ladakh Batholith provide an excellent constraint on its exhumation at low temperature ? 110°C. The oldest apatite ages of 23.1 ± 1.1 Ma from the Khardung La (5440 m) and 25.4 ± 2.6 Ma from the Chang La (5301 m) have been obtained from the highest uplifted parts of the batholith, while the youngest ages are 11.8 ± 1.1 Ma (4038 m) and 9.2 ± 0.9 Ma (3732 m) respectively. Apatite ages from Lyoma-Hanle section are tightly clustered between 17.8 and 12.0 Ma. Elevation profiles of these two sections yield exhumation rates of 0.1 mm/a for the Khardung La and Chang La sections between 25 and 9 Ma. In addition, three cogenetic zircons yielded FT ages of 41.4 ± 2.3, 43.8 ± 3.4 and 31.7 ± 2.7 Ma, indicating a younging of the FT age from west to east. These FT data from the batholith indicate a slow cooling and exhumation history, as inferred from elevation vs age FT apatite plots.
Citation: Current Science (2007), 92(4): 490-496
URI: http://repository.iitr.ac.in/handle/123456789/6304
Issue Date: 2007
Keywords: Exhumation
Fission track dating
Ladakh Batholith
ISSN: 113891
Author Scopus IDs: 55492122500
7005034455
7406400956
57211729470
Author Affiliations: Kumar, R., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Lal, N., Department of Geophysics, Kurukshetra University, Kurukshetra 136 119, India
Singh, S., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Jain, A.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Corresponding Author: Singh, S.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India; email: sandpfes@iitr.ernet.in
Appears in Collections:Journal Publications [ES]

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