古地磁与西藏板块及特提斯的演化

利用西藏新的古地磁资料,研究了西藏三个地块的漂移和特提斯的演化、三个地块在晚古生代是冈瓦纳古陆的一部分,其北侧存在着古特提斯大洋,可可西里-金沙江断裂是它的消亡场所。中生代,冈瓦纳古陆分裂,羌塘、冈底斯等地块依次向北漂移,北大陆增生。漂移过程中,早、晚期中特提斯诞生和消亡,班公湖-怒江断裂带,雅鲁藏布江断裂带是它们消亡的场所。

PALAEOMAGNETISM AND EVOLUTION OF TIBET PLATES AND TETHYS

Palaeomagnetic results from the Himalaya Plate, Gangdese Plate and the Qiangtang Plate in Tibet show that these plates belonged to part of Gondwanaland bounded in the north by the Paleo-Tethys ocean during Late Paleozoie. The ocean was subdueted along the Kekexili-Jinsajiang Fault Zone. These plates rifted, drifted towards the north in a proper order, resulting in the formation and subduction of Mid-Tethys ocean along Yaluzangbu Fault Zone and Bangonghu-Nujiang Fault Zone during Mesozoic.