南天山褶皱带北缘基性超基性杂岩带的地质学特征与大地构造意义  

THE GEOLOGICAL FEATURES AND TECTONIC SIGNIFICANCE OF BASICULTRABASIC COMPLEX BELT IN THE NORTHERN MARGIN OF SOUTHERN TIANSHAN FOLDING BELT, CHINA

作　　者：姜常义[1] 穆艳梅[1] 赵晓宁[1] 张虹波[1] 

机构地区：[1]西安工程学院科研处,陕西西安710054

出　　处：《西安工程学院学报》2000年第2期1-6,31,共7页Journal of Xi'an Engineering University

基　　金：国家 3 0 5科技攻关项目资助! (96 91 5 0 40 4B)

摘　　要：沿南天山北缘的古洛萨拉 -乌瓦门 -拱拜子一带 ,分布有一条基性 -超基性杂岩带。其中 ,辉长岩墙形成于 ( 14 12± 54 )Ma ,而变质橄揽岩、玄武岩和其他一些小侵入体都形成于古生代中期。这些地质体的产状、岩石学和地球化学特征都没有提供与蛇绿岩套有关的信息。据此 ,我们认为 。A basicultrabasic complex belt occurs along GuluosalaWuwamenGongbaizi zone in the northern margin of southern Tianshan folding belt. The gabbro dike a mong which emplaced at (1 412±54)Ma, but all metamorphic peridotite, basalt and some small intrusive bodies were formed at middle period of Palaeozoic era. Their occurrence, petrological and geochemical features dont provide information related to ophiolite. In view of the above, it can be considered that the southern Tianshan folding belt only appeared a oceanization process at Palaeozoic era. [

关 键 词：基性-超基性杂岩带 岩石学 在地构造 褶皱带 

分 类 号：P588.124[天文地球—岩石学] P588.125[天文地球—地质学]