【摘 要】
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The India-Asia collision is an outstanding smoking gun in the study of continental collision dynamics.How and when the continental collision occurred remains a long-standing controversy.Here we present two new paleomagnetic data sets from rocks deposited
【机 构】
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State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy o
论文部分内容阅读
The India-Asia collision is an outstanding smoking gun in the study of continental collision dynamics.How and when the continental collision occurred remains a long-standing controversy.Here we present two new paleomagnetic data sets from rocks deposited on the distal part of the Indian passive margin,which indicate that the Tethyan Himalaya terrane was situated at a paleolatitude of～19.4° S at～75 Ma and moved rapidly northward to reach a paleolatitude of～13.7°N at～61 Ma.This implies that the Tethyan Himalaya terrane rifted from India after～75 Ma,generating the North India Sea.We document a new two-stage continental collision,first at～61 Ma between the Lhasa and Tethyan Himalaya terranes,and subsequently at～53-48 Ma between the Tethyan Himalaya terrane and India,diachronously closing the North India Sea from west to east.Our scenario matches the history of India-Asia convergence rates and reconciles multiple lines of geologic evidence for the collision.
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