论西昆仑大陆边缘构造演化及塔里木西南盆地类型

中元古代至早古生代塔里木板块与羌塘－扬子板块发生解体。晚古生代至三叠纪西昆仑演化为活动大陆边缘,自南而北形成了公洛尔－桑株塔克、库尔浪－卡尔隆沟、弧、盆体系,塔里木西南则于这一时期发展成为克拉通坳陷型盆地。三叠纪末塔里木板块与羌塘－扬子板块碰撞,以及中、新生代以来特提斯开与合的“手风琴“式运动施加的影响,使西昆仑发生了强烈的变质、变形和变位。

THE FORMATION AND EVOLUTION OF THE WESTERN KUNLUN CONTINENTAL MARGIN

From the Middle Proterozoic to Early Paleozoic, the Tarim plate and the Qangtang-Yangtze plate were most probably disintegrated. From the Late Paleozoic to Triassic the western Kunlun might evolve into an active continental margin, resulting in the formation of the Kongur-Sanju and Qarlang-Karlong trench-arc-basin systems from north to south. Meanwhile, the southwestern part of Tarim developed probably into a cratonic downwarped basin. Because of the possible collision between the Tarim plate and Qangtang-Yangtze plate at the end of the Triassic and "accordion" -type motion of Tethys since the Mesozoic and Cenozoic, the western Kunlun was severly deformed, metamorphosed and displaced.