新疆准噶尔造山带多旋回开合构造特征  

Characteristics of polycyclic opening-closing tectonics in the J unggar orogenic belt ,Xinjiang

作　　者：梁云海[1] 李文铅[1] 李卫东[1] 

机构地区：[1]新疆地质矿产勘查开发局第一区域地质调查大队,新疆乌鲁木齐830011

出　　处：《地质通报》2004年第3期279-285,共7页Geological Bulletin of China

基　　金：中国地质调查局<1:25万纸房幅区域地质调查>项目成果

摘　　要：新疆准噶尔造山带是位于西伯利亚与塔里木两大陆壳之间的多旋回造山带,是古亚洲洋的主要部分。该造山带是在新元古代早期形成的克拉通基底上裂解、扩张成洋的,在其发展历史进程中,经历了多旋回手风琴式开合运动,此开彼合,首尾衔接,几经洋陆转化,由一系列沟弧盆体系挤压拼贴到一起,于石炭纪末最终固结成新的古亚洲大陆。成陆后并不稳定,在中—新生代时期仍有强烈的活动性与造山过程,表现为发育多时期的蛇绿岩、多时期的造山花岗岩和多种不同类型的造山作用。The Junggar orogenic belt in Xinjiang is a polycyclic orogenic belt between the Siberian conti-nental crust and Tarim continental crust as well as a main part of the Paleo-Asian Ocean.This orogenic belt broke up and expanded into an ocean on the basement of the craton formed in the early Neoprotero-zoic.Its development progressed through polycyclic accordion-style opening-closing movement(when one part opened the other part closed,and the head was connected with the tail)and multiple transformations of land and sea,and finally a number of trench-arc-basin systems were amalgamated and consolidated into a new Paleo-Asian continent at the end of the Carboniferous.After the formation of the continent,it was not stable;strong activity and orogeny still continued during the Meso-Cenozoic.The manifestations in-clude poly-epochal ophiolite and orogenic granite and different types of orogeny.

关 键 词：多旋回 手风琴式运动 此开彼合 首尾衔接 造山作用 准噶尔造山带 

分 类 号：P541[天文地球—构造地质学]