西昆仑造山带复式增生楔的构造特征与演化  

STRUCTURES AND EVOLUTION OF THE MULTIPLE ACCRETIONARY COMPLEXES,WESTERN KUNLUN OROGENIC BELT (CHINA)

作　　者：肖文交[1] 方爱民[1] 李继亮[1] 周辉[2] BFWindley 袁超[4] 陈汉林[5] 张国成[6] 

机构地区：[1]中国科学院地质与地球物理研究所岩石圈构造演化重点实验室,北京100029 [2]北京大学科学研究部,北京100871 [3]累斯特大学地质系 [4]中国科学院广州地球化学研究所,广东广州510640 [5]浙江大学地球科学学院,浙江杭州310027 [6]焦作工学院地质系,河南焦作454100

出　　处：《新疆地质》2003年第1期31-36,共6页Xinjiang Geology

基　　金：国家自然科学基金项H(40172080和40032010)共同资助

摘　　要：通过对西昆仑古生代主剪切带和早中生代增生楔杂岩剖面中的组成与构造等特征,西昆仑早古生代和晚古生代一早中生代两次向南的增生造山作用及其增生楔的组成与构造演化进行系统研究,探讨增生楔杂岩在大陆造山带及其对大陆侧向增生的意义.The western Kunlun range is located between the Tarim block to the north and the Karakoram-Qiangtang block to the south. Its tectonic evolution is of key significance to the crustal growth of Asia in the Paleozoic and Early Mesozoic. However, there is no consensus about the western Kunlun geology and its tectonic model is still in controversial. This paper deals mainly with two accretionary complexes in this high mountain range, the Early Paleozoic Kudi accretionary complex and the Mazar accretionary complex, respectively. The former one comprises of gneiss and schist, which contains blocks of ultrabasic rock and marble as a metamorphosed accretionary complexe related to Silurain-Devonian southward accretional and collisional event. The latter is composed of an accretionary complex and an overlain Qitai Daban forearc basin, which records a southward accretional and finally collisional events between the Tarim block to the north and the Karakoram-Qiangtang block to the south. The complicated accretional and collisional processes have added huge materials to the surface of central Asia continent thus enlarging the Asian continent.

关 键 词：西昆仑造山带 复式增生楔 构造特征 碰撞-增生事件 大陆侧向增生 增生造山作用 

分 类 号：P542[天文地球—构造地质学]