HR: 1330h
AN: T12C-0469    [PDF]
TI: Miocene Gaolingong faulting and its implications for extrusion tectonics in the eastern Himalayan syntaxis
AU: * Lo, C
EM: loch@ccms.ntu.edu.tw
AF: Dept. Geosciences, National Taiwan Univ., P.O. Box 13-318, Taipei, 106 Taiwan
AU: Hsu, F
AF: Dept. Geosciences, National Taiwan Univ., P.O. Box 13-318, Taipei, 106 Taiwan
AU: Chung, S
EM: sunlin@ccms.ntu.edu.tw
AF: Dept. Geosciences, National Taiwan Univ., P.O. Box 13-318, Taipei, 106 Taiwan
AU: Lee, T
EM: t44001@cc.ntnu.edu.tw
AF: Dept. Earth Sciences, National Taiwan Normal Univ., 88, Tingchou Rd. Sec. 4, Taipei, 117 Taiwan
AB: Thermochronological investigation of the Gaolingong Fault and its adjacent brench faults, provides constraints to the Cenozoic extrusion tectonics of Indochina and the tectonic evolution in the eastern Himalayan syntaxis. The results show that the main phase of the right-lateral shearing along the Gaolingong fault occurred in the period of ~18 to12 Ma, which is synchronous with that of the Karakoram-Jiali Fault in southern Tibet and the Sagaing Fault in western Indochina. This evidently indicates that the Karakoram-Jiali Fault, the Gaolingong Fault and the Sagaing Fault form a long series of right-lateral shear zones that southerly bound for the eastward extrusion of northern Tibet. It is also suggested that the present-day dextral deformation along this deformation boundary may have a prolonged history starting from early Miocene in response to the continuing India-Asia collision. However, the synchronous timing for shearing of the adjacent fault zones may also indicate that the clockwise rotation of continental blocks may have played an important role in local scale despite of the long continuity of fault systems in board.
DE: 8107 Continental neotectonics
DE: 8110 Continental tectonics--general (0905)
DE: 9320 Asia
DE: 9604 Cenozoic
SC: Tectonophysics [T]
MN: 2003 Fall Meeting