大坂山蛇绿岩特征及其形成环境  

CHARACTERISTICS OF DABANSHAN OPHIOLITE AND ITS ORIGINAL ENVIRONMENT

作　　者：郭通珍[1] 陈方本 赵凤清[2] 

机构地区：[1]青海省区调综合地质大队,西宁810012 [2]国土资源部天津地质矿产研究所,天津300170

出　　处：《青海地质》1999年第2期14-24,共11页

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.

关 键 词：大坂山 蛇绿岩 初始小洋盆 形成环境 岩石化学 

分 类 号：P588.1[天文地球—岩石学] P584[天文地球—地质学]