Jade, S. and Bhatt, B. and Bendick, R. and Gaur, V. and Molnar, P. and Anand, M. and Kumar, D. (2004) GPS measurements from the Ladakh Himalaya, India: Preliminary tests of plate-like or continuous deformation in Tibet. Geological Society of America Bulletin, 116 (11-12). pp. 1385-1391. DOI https://doi.org/10.1130/B25357.1
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Abstract
Observations of relative motion in a geodetic network in Ladakh, India, and across southern Tibet indicate slow shear on the Karakorum fault, rapid east-west extension across the whole of southern Tibet, and constant arc-normal convergence between India and southern Tibet along the Himalayan arc. Measurements of ten campaign-style and six permanent sites with global positioning system (GPS) precise geodesy provide these bounds on the style and rates of the large-scale deformation in the Tibet-Himalaya region. Divergence between sites at Leh, Ladakh, India, and Shiquanhe, western Tibet, as well as slow relative motion among sites within the Ladakh network, limit right-lateral slip parallel to the Karakorum fault to only 3.4 ± 5 mm/yr. This low rate concurs with a recent estimate of 3–4 mm/yr for Late Holocene time, but disagrees with the much higher rate of 30–35 mm/yr that has been used to argue for plate-like behavior of the Tibetan Plateau. Convergence between Ladakh and the Indian subcontinent at 18.8 ± 3 mm/yr at 224° ± 17° (1σ) differs little from estimates of convergence across the central segment of the Himalaya. Finally, lengthening of the baseline between Leh, Ladakh, and Lhasa (in southeastern Tibet) at 17.8 ± 1 mm/yr or between Leh and Bayi (farther to the southeast) at 18 ± 3 mm/yr, is consistent with an extrapolation of rates of east-west extension of the Tibetan Plateau based both on shorter GPS baselines (e.g., Lhasa-Simikot) and on diverging slip vectors of earthquakes in the Himalaya. We interpret these results to indicate that Tibet behaves more like a fl uid than like a plate
Item Type: | Article |
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Additional Information: | R Bendick with COMET, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, UK |
Uncontrolled Keywords: | 2005 AREP IA44A IA49 2005 P COMET |
Subjects: | 02 - Geodynamics, Geophysics and Tectonics |
Divisions: | 02 - Geodynamics, Geophysics and Tectonics |
Journal or Publication Title: | Geological Society of America Bulletin |
Volume: | 116 |
Page Range: | pp. 1385-1391 |
Identification Number: | https://doi.org/10.1130/B25357.1 |
Depositing User: | Sarah Humbert |
Date Deposited: | 09 Mar 2011 13:05 |
Last Modified: | 23 Jul 2013 09:59 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/1699 |
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