关键词: 华南地块, 印支地块, 红河断裂带, 走滑断层, 古地磁, 欧拉转动

Abstract: The Mesozoic paleomagnetic pole positions from the Indochina block and South China block are not consistent with each other in that the formers are displaced with respect to the latters westward in longitude and southward in latitude. The displacement is here interpreted as to be related to the India-Eurasia collision in such a way that after the collision the Indochina block was rotated clockwise by 8? about the Assam syntaxis, followed by an eastward translation of the South China block by about 20?. This interpretation is in accord with the propagating extrusion tectonics model, and suggests that the sense of motion along the Red River fault has reversed, i. e., changed from the early left-lateral to the present right-lateral.

Key words: South China block, Indochina block, Red River fault, Propagating extrusion tectonics, Paleo- magnetism, Euler rotation