Underplating in the Himalaya-Tibet Collision Zone Revealed by the Hi-CLIMB Experiment

American Association for the Advancement of Science (AAAS) - Tập 325 Số 5946 - Trang 1371-1374 - 2009
J. Nábělek1, György Hetényi2, Jérôme Vergne2, Soma Nath Sapkota3, B. Kafle3, Mei Jiang4, Heping Su4, John Chen5, Bor‐Shouh Huang6, Texas Stream Team
1College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA#TAB#
2Laboratoire de Géologie, École Normale Supérieure, CNRS-UMR 8538, 24 Rue Lhomond, 75005 Paris, France.
3National Seismological Center, Department of Mines and Geology, Kathmandu, Nepal
4Institute of Geology, Chinese Academy of Geological Sciences, Beijing, People’s Republic of China (PRC).
5Institute of Theoretical and Applied Geophysics, Peking University, Beijing, PRC.
6Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan

Tóm tắt

Himalayan-Tibetan Underplate The Himalayas formed from the collision of India with Eurasia beginning about 50 million years ago, but the fate and position of the subducted Indian crust was not well defined until the Hi-CLIMB seismic experiment was initiated. The centerpiece of the project is an 800-kilometer-long, closely spaced, linear array of broadband seismographs, extending from the Ganges lowland, across the Himalayas, and onto the central Tibetan plateau. Nábělek et al. (p. 1371 ) present images of the crust and upper mantle of the Southern Tibetan plateau underthrust northward by the Indian plate, in which they trace the base of the Indian plate to 31°N. The character of the crust-mantle interface in this region suggests that the Indian crust is at least partly decoupled from the mantle beneath.

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American Association for the Advancement of Science (AAAS)

Tập 325 Số 5946

1371-1374

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