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GPS measurements from the Ladakh Himalaya, India: Preliminary tests of plate-like or continuous deformation in Tibet

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dc.contributor.author Jade, S
dc.contributor.author Bhatt, B. C
dc.contributor.author Yang, Z
dc.contributor.author Bendick, R
dc.contributor.author Gaur, V. K
dc.contributor.author Molnar, P
dc.contributor.author Anand, M. B
dc.contributor.author Kumar, D
dc.date.accessioned 2008-09-12T11:28:18Z
dc.date.available 2008-09-12T11:28:18Z
dc.date.issued 2004-11
dc.identifier.citation Geological Society of America Bulletin, Vol. 116, No. 11 - 12, pp. 1385 - 1391 en
dc.identifier.issn 0016-7606
dc.identifier.uri http://hdl.handle.net/2248/3590
dc.description.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 fluid than like a plate. en
dc.publisher Geological Society of America en
dc.relation.uri http://dx.doi.org/10.1130/B25357.1 en
dc.subject Geodesy en
dc.subject Geodynamics en
dc.subject Tibetan Plateau en
dc.subject Himalaya en
dc.subject Karakorum en
dc.subject Continuum Mechanics en
dc.title GPS measurements from the Ladakh Himalaya, India: Preliminary tests of plate-like or continuous deformation in Tibet en
dc.type Article en

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