摘要
本文综合对比了新疆东部三条蛇绿混杂岩带的岩石组合、地球化学特征及其大地构造背景,指出克拉美丽—塔克扎勒—伊吾蛇绿混杂岩带是西伯利亚板块和塔里木板块晚古生代末的最后缝合线;中天山北缘米什沟—干沟蛇绿混杂岩带是古准噶尔洋壳早古生代向塔里木北缘俯冲的标志;南天山红柳河—玉石山蛇绿岩带则是南天山弧后洋盆的残骸。
The petrological and geochemical features, tectonic settings and emplacementmechanism of three ophiolitic melange belts in eastern Xinjiang have been studiedthrough comparison. The Kalameli-Takezale-Yiwu ophiolitic melange belts distrib-uted in East Junggar represents the suture resulting from final collision between theTarim and Siberian Plates in the terminal Late Paleozoic. The Mishigou-Gangouophiolitic melange belt along the north margin of the Mid-Tianshan resulted fromthe southward subduction of Paleo-Junggar oceanic crust in the Early Paleozoic.The Hongliujiang-Yushishan ophiolitic blte in the South Tianshan is the remnantof the South Tianshan back-are sea basin.
出处
《地质论评》
CAS
CSCD
北大核心
1993年第3期236-247,共12页
Geological Review
关键词
蛇绿混杂岩带
构造背景
板块构造
ophiolitic melange belt
tectonic setting
plate tectonics
eastern Xinjiang
