摘要
野外地质观测表明,包古图Ⅲ号岩体由两部分组成（北部的Ⅲ-1和南部的Ⅲ-2）,Ⅲ-1的岩性为花岗闪长岩和石英闪长岩,Ⅲ-2的岩性为石英闪长岩、闪长岩和少量辉石闪长岩。挑选Ⅲ-1岩体中部新鲜石英闪长岩样品,测得其锆石SHRIMP年龄为（313±3）Ma。包古图Ⅰ、Ⅱ、Ⅲ-1、Ⅳ、Ⅴ号岩体具有相似的形成时间,集中在310-325 Ma,成矿作用发生在岩浆演化的晚期（316-310 Ma）。
The intrusive body Ⅲ in the Baogutu area is composed of two separate parts（Ⅲ-1 in north and Ⅲ-2 in south）.The lithologic units in Ⅲ-1 are granodiorite and quartz diorite and those in Ⅲ-2 are quartz diorite,diorite and a small amount of pyroxene diorite.A fresh quartz diorite sample from the central part of Ⅲ-1 was dated to 313±3 Ma by zircon SHRIMP.Intrusive body Ⅰ,Ⅱ,Ⅲ-1,Ⅳ and Ⅴ were formed during 310-325 Ma.The copper mineralization occurred in 316-310 Ma.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2011年第2期212-222,共11页
Earth Science Frontiers
基金
国家国际科技合作项目(2010DFB23390)
