晚白垩世以来沿阿尔金断裂带的阶段性走滑隆升  

Multi-stage strike-slip motion and uplift along the Altyn Tagh fault since the Late Cretaceous

作　　者：任收麦[1] 葛肖虹[2] 刘永江[2] 常丽华[2] 吴光大[2] 袁四化[2] 

机构地区：[1]中国地质科学院地质力学研究所 [2]吉林大学地球科学学院,吉林长春130061

出　　处：《地质通报》2004年第9期926-932,共7页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:40272099)资助。

摘　　要：年代学和沉积学特征表明,与印度板块约55MaBP以来沿喜马拉雅东、西构造结缝合带碰撞后青藏高原的阶段性隆升相对应,沿阿尔金断裂带阿尔金山地区亦发生阶段性走滑隆升,时间段大致为55～30MaBP、约20MaBP、约10MaBP和1～0.8MaBP。始新世—渐新世期间,阿尔金断裂大型左行走滑活动的发生,对中国西北大陆构造格架产生巨大的影响,不仅改造了古老的盆地和褶皱带,而且控制了新生代的走滑拉分盆地和两侧盆地的沉积速率,并对青藏高原的阶段性隆升和地壳物质东向蠕散起到调节作用。Chronological and sedimentological evidence indicates that with the oblique stepwise rise and growth of the Qinghai-Tibet Plateau after India-Eurasia collision along the Brahmaputra suture zone, multi-stage strike-slip motion and uplift took place along the Altyn Tagh (Altun) fault at 55-30 Ma BP- about 20 Ma BP, about 10 Ma BP and 1-0.8 Ma BP respectively. The large-scale sinistral strike-slip motion of the Altyn Tagh fault occurring during the Eocene-Oligocene exerted great influence on the tectonic. It not only modified the old basins and folds, but also controlled the sedimentation rates of the Cenozoic strike-slip pull-apart basin and basins on both sides. It also played a role in readjusting the oblique stepwise uplift and eastward creep of crustal material of the Qinghai-Tibet Plateau.

关 键 词：阿尔金断裂 阶段性 走滑隆升 青藏高原 

分 类 号：P534.53[天文地球—古生物学与地层学] P534.6[天文地球—地质学]