摘要
根据1996～1998年1:5万区调资料,对北祁连大坂山蛇绿岩特征的研究认为:该类蛇绿岩属非典型蛇绿岩,形成的构造环境是在陆壳基底上裂陷的初始小洋盆中,不具真正洋壳的壳层性质,是初始小洋盆发生发展的产物。
Based on 1.50,000 regional geological survey materials from 1996 to 1998, the characteristics of Dabanshan ophiolite in North Qilian indicate that the ophiolite belongs to non-typical ophiolite,its original structural environment is in a chasmic initial minor ocean basin on the continental crust basement,have not the crustal character of real oceanic crust, is the product of the initial minor ocean basin developing.
