HR: 0800h
AN: V11A-1418    [Abstracts]
TI: Evidence for Cretaceous uplift of the Northern Tibetan plateau
AU: Li, H
EM: lihaibing@ccsd.org.cn
AF: Key Laboratory for Contiental Dynamics of MLR, Institute of Geology, CAGS, 26 Baiwanzhuang Road, Beijing, 100037 China
AU: * Yang, J
EM: yangjsui@ccsd.org.cn
AF: Key Laboratory for Contiental Dynamics of MLR, Institute of Geology, CAGS, 26 Baiwanzhuang Road, Beijing, 100037 China
AB: The northern part of Tibet Plateau became a coherent block after closure of the Paleo-Tethys Ocean in the Triassic. During the closure, a series of large-scale strike slip faultsϻsuch as the Altyn Tagh, Anemaqen and North Qaidam faults were formed as a result of the NE-directed oblique subduction of the Qiangtan block, which had previously separated from the Gondwanaland. The N-S Longmenshan fold belt was also formed at this time due to the buttressing effect of the South China Plate to the east. Uplift of the northern Tibet Plateau began in the Cretaceous as a result of closure of the Middle Tethys Ocean and subduction of the Gangdes Block beneath North Tibet along the Bankong Lake-Nujiang suture zone. Uplift of the plateau was aided by the buttressing effect of the Tarim-Alax platform to the north and by the westward subduction of the Pacific Plate beneath the China Continent.
DE: 0932 Radioactivity methods
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2004 AGU Fall Meeting