阿尔金造山带中、新生代的演化  

Evolution of the Altun Orogenic Belt in the Mesozoic and Cenozoic

作　　者：黄立功[1,2] 钟建华[1,3] 郭泽清[3] 刘云田[1,2] 江波[2] 管全俊[2] 柳祖汉[4] 张跃中[2] 张永庶[2] 李勇[3] 

机构地区：[1]中国科学院广州地球化学研究所 [2]青海油田公司,甘肃敦煌733202 [3]石油大学(华东)地球资源与信息学院,山东东营257061 [4]湘潭工学院图书馆

出　　处：《地球学报》2004年第3期287-294,共8页Acta Geoscientica Sinica

基　　金：中国石油天然气集团公司创建新基金项目 (编号 :2 0 0 2F70 10 8)资助

摘　　要：塔里木盆地东缘的阿尔金造山带中、新生代经历了一个复杂的大地构造演化历程 :中生代早期 (T)为隆升夷平 ,中生代中后期 (J—K)为裂陷沉积阶段 ;自古新世—中新世因塔里木盆地向东挤压使得阿尔金造山带东南缘出现了右行走滑仰冲 ,柴达木壳体向阿尔金造山带之下俯冲 ,阿尔金造山带隆起。塔里木盆地相对柴达木盆地向北移动 ,最大距离可达 4 0 0～ 5 0 0km ,使得原来统一的塔里木 敦煌 柴达木联合盆地裂解。由于逆冲走滑使阿尔金造山带内部发育了一系列小型的走滑盆地 ,形成了复杂的盆地沉积建造 ,并伴有动力变质及火山作用 ;中新世末 ,东西向挤压转变为不对称的南北向力隅作用 ,使得阿尔金造山带发生构造反转 ,右行转变为左行 ,统一的塔里木 敦煌盆地裂解。塔里木盆地向南漂移 ,距离达 4 0 0多公里。塔里木盆地的向东俯冲使阿尔金造山带急骤隆起 ,同样 ,在阿尔金造山带内部发育了一系列小型盆地 ,形成了相应的复杂沉积建造。The Altun orogenic belt on the eastern edge of Tarim basin experienced a complex geotectonic evolution in the Mesozoic and Cenozoic: uplifting and planation in early Mesozoic and collapsing and sedimentation in late Mesozoic. The eastward compression of Tarim Basin from Paleocene to Miocene resulted in the formation of a right-lateral slip obduction on the southeastern edge of the Altun orogenic belt and the subduction of Qaidam plate toward the Altun orogenic belt as well as the uplifting of this belt. Tarim basin migrated for a maximum distance of 400 to 500 km relative to Qaidam Basin, causing the disintegration of the originally integrated Tarim-Dunhuang-Qaidam Basin. The obduction strike-slip generated a series of small-sized strike-slip basins and a complex sedimentary formation accompanied by kinetic metamorphism and volcanism. The conversion of the east-west compression to a nonsymmetrical south-north couple-compression at the end of Miocene led to a structural reversion from right-lateral to left-lateral in the Altun orogenic belt and the disintegration of the integrated Tarim-Dunhuang basin. Tarim Basin drifted southward for more than 400 km. The eastward subduction of Tarim Basin caused drastic uplifting of the Altun orogenic belt. Besides, a series of small-sized basins were developed and a complex sedimentary formation was formed correspondingly in the Altun orogenic belt.

关 键 词：地质构造 演化 造山带 走滑断裂 塔里木盆地 柴达木盆地 

分 类 号：P542.3[天文地球—构造地质学]