The upper mantle structure of the Tibetan Plateau and its implication for the continent-continent collision
- 71 Downloads
The upper mantle structures of Himalayas-Tibet have been obtained from the migration of receiver functions of the teleseismic events recorded by INDEPTH-III. The result of migration imaging shows a dipping interface subducting northward from the depth of 100 km to the 410-km discontinuity underneath southern Tibet. It indicates that the lithospheric mantle of the Indian continent had been detached from the crust and deeply subducted to the upper mantle of Eurasia during the Indo-Eurasian collision. This kind of continent-continent collision process is fundamentally different from the oceanic collision.
KeywordsTibetan Plateau receiver function upper mantle structures Indo-Eurasian collision dipping interface
Unable to display preview. Download preview PDF.
- 2.Lsacks, B. L., Oliver, L., Sykes, R., Seismology and the new global tectonics, J. Geophys. Res., 1968, 73: 5885–5900.Google Scholar
- 4.Houseman, G.. A., England, P. C., A crustal-thickening model for the Indo-Asian collision, in the Tectonic Evolution of Asia ((eds. Yin, A., Harrison, T. M.), New York: Cambridge Univ. Press, 1996, 1–17.Google Scholar
- 6.Fu, R. S., Li, L. G., Huang, J. H. et al., Three-step model of the Qinghai-Xizang Plateau uplift, Chinese J. Geophys. (in Chinese), 1999, 42: 609–616.Google Scholar
- 7.Fu, R. S., Xu, Y. M., Huang, J. H. et al., Numerical simulation of the compression uplift of the Qinghai-Xizang Plateau, Chinese J. Geophys. (in Chinese), 2000, 43: 346–355.Google Scholar
- 8.Seeber, L., Ambruster, J. G., Quittmeyer, R. C., Seismicity and continental subduction in Himalayan arc, in Zagros, Hindu Kush, Himalaya, Geodynamic Evolution, Geodyn. Ser., Vol. 3 (eds. Gupta, H. K., Delany, F. M.), Washington: AGU, 1981, 215–242.Google Scholar
- 11.Mattauer, M., Intracontinental subduction, crust mantle decollement and crustal stacking wedge in the Himalaya and other collision belts, in Collision Tectonics ((eds. Coward, M. P., Ries, A. C.), London: Geol. Soc. Spec. Publ., 19, 1986, 35–60.Google Scholar
- 15.McKenzie, D. P., Speculation on the consequences and causes of plate motions, Geophys. J. Roy. Astr. Soc., 1969, 18: 1–32.Google Scholar
- 20.Zhao, W. J., Nelson, K. D., Xu, Z. X. et al., Double intracontinental underthrusting structure of the Yarlung Zangbo suture and different molten layers-a comprehensive study of INDEPTH’s results,Google Scholar
- 21.Wu, Q. J., Zeng, R. S., The crustal structure of the Qinghai-Xizang Plateau inferred from broadband teleseismic waveforms, Chinese J. Geophys. (in Chinese), 1998, 41: 669–679.Google Scholar
- 24.Zeng, R. S., Ding, Z. F., Wu, Q. J. et al, Seismological evidences for the multiple incomplete crustal subductions in Himalaya and southern Tibet, Chinese J. Geophys. (in Chinese), 2000, 43: 780–797.Google Scholar
- 27.Molnar, P., A review of geophysical constraints on the deep structure of the Tibetan Plateau the Himalaya and the Karakoram, and their tectonic interpretation, Philos. Trans. R. Soc. London. Ser. A, 1988, 357–396.Google Scholar