摘要
本文主要依据东昆仑地区的超镁铁岩,玄武岩和花岗岩类岩石的岩石化学、稀土元素、痕量元素及同位素测年等测试成果,结合孢粉及生物化石特征,并综合有关地质构造与地球物理资料,认为至少在中元古代昆仑洋壳即已形成,并在此基础上探讨了东昆仑区域构造的发展演化特征。
According to the testing results of petrochemistry,rare earth elements,trace elements,isotopic agedetermination,and so of ultramafite,basalt,granitoid rocks from East Kunlun region,combining with the characters ofsporopoUen and other fossils and summarizing the data related to geological structure and geophysies,a viewpoint has been putforward that ancient Kunlun oceanic Crust was formed as early as before Middle Proterozoic.And then evolutional features ofregional tectonics of east Kunlun is discussed.
关键词
地质构造
发展
演化
东昆仑
ancient Kunlun oceanic crust suture zone of middle Kunlun“A”type underthrust of South Kunlun Volcano—Magmatic Arc of Southern Margin of Qaidam
