Maqola

Raising Tibet

T. Mark HarrisonInstitute of Geophysics and Planetary Physics and the Department of Earth and Space Sciences, University of California, Los Angeles, Los Angeles, CA 90024Peter CopelandDepartment of Geosciences, University of Houston, Houston, TX 77204W. S. F. KiddDepartment of Geological Sciences, State University of New York at Albany, Albany, NY 12222An YinInstitute of Geophysics and Planetary Physics and the Department of Earth and Space Sciences, University of California, Los Angeles, Los Angeles, CA 90024

1992en

ABI

Annotatsiya

Thermochronologic, sedimentologic, oceanographic, and paleoclimatic studies suggest that rapid uplift and unroofing of southern Tibet began about 20 million years ago and that the present elevation of much of the Tibetan plateau was attained by about 8 million years ago. Hypotheses advanced to explain the tectonic evolution of the India-Asia collision, which began about 40 to 50 million years ago, predict the timing and rates of crustal thickening of the southern margin of Asia. However, these models do not predict the prominently enhanced early Miocene denudation and uplift that are manifested in a variety of geological records. A model involving continental extrusion, development of a crustal-scale thrust ramp of the Main Central Thrust beneath the Gangdese belt, and lithospheric delamination provides a history consistent with these observations.

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Identifikatorlar

DOI: 10.1126/science.255.5052.1663

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