塔里木盆地北缘新生代碱性玄武岩的地质地球化学  

Geology and Geochemistry of the Cenozoic Alkaline Basalt on the Northern Margin of the Tarim Basin,Xinjiang,China

作　　者：邹天人[1] 曹亚文[1] 徐珏[1] 於晓晋[2] 夏凤荣[1] 陈伟十[1] 

机构地区：[1]中国地质科学院矿床地质研究所,北京100037 [2]北京科技大学,100083

出　　处：《地质论评》1999年第S1期1072-1077,共6页Geological Review

基　　金：国家自然科学基金资助项目(编号49070166);地质行业科学技术发展基金资助项目及国家305项目(编号85- 902-06-10)专题和(编号96-915-04-05)专题研究的成果

摘　　要：新生代碱性玄武岩是塔里木盆地北缘碱性岩带最晚期形成的,由第三系盆地中陆相中心式喷发的碱性橄榄玄武岩和其下古生代地层中的碱性橄榄辉长岩岩筒和岩脉组成。它们是来自富集地幔的同源碱性岩浆,在不同空间冷凝结晶形成。On the northern margin of the Tarim basin, the Cenozoic alkaline basalts formed the latest during the formation of the alkaline rock belt. The alkaline basalts are composed mainly of alkali-olivine basalts and alkali-olivine gabrros, the former are characterized by continental central eruption in the Tertiary basin and the latter occurred as pipes or dikes and are related to the same rocks in the underlying Palaeozoic strata. The two kinds of rocks were formed as a result of comagmatic crystallization from enrichment mantle in different space.

关 键 词：地球化学 碱性玄武岩 新生代 塔里木盆地 新疆 

分 类 号：P588.145[天文地球—岩石学]