新疆菁布拉克基性超基性岩带的Sm－Nd同位素年龄  

Sm-Nd Isotope Ages of Basic and Ultrabasic Rocks from the Qingbulak Belt,Xinjiang

作　　者：倪守斌[1] 满发胜[1] 陈江峰[1] 

机构地区：[1]中国科学技术大学地球和空间科学系

出　　处：《岩石矿物学杂志》1994年第3期227-231,共5页Acta Petrologica et Mineralogica

基　　金：国家"七五"重点科技攻关项目

摘　　要：Ｓｍ－Ｎｄ矿物等时线定年结果表明，菁布拉克岩带基性超基性岩形成于３２０Ｍａ，其形成时代晚于早石炭世早期的火山活动，是塔里木板块与巩乃斯微板块碰撞晚期拉张构造环境的产物。Basic and ultrabasic rocks were dated by the Sm-Nd mineral isochron technique.The results show that these rocks were formed at 320 Ma B.P.after the Early Carboniferous volcanism,being products in an extonsion tec-tonic setting at the late stage of collision between the Tarim plate and the Gongnaisi microplate.

关 键 词：基性岩 超基性岩 钐 钕 同位素年龄 

分 类 号：P588.124[天文地球—岩石学]