摘要
青海东昆仑西段祁漫塔格地区发现新元古代晚期热—构造事件的岩浆记录,其成因判别属碰撞型花岗岩体。岩石类型为片麻状中—细粒黑云母二长花岗岩。侵入体平面形态呈不规则椭圆状,面积20 km2,长轴北北西向展布。研究表明东昆仑西段祁漫塔格地区在新元古代晚期其构造背景与阿尔金山此时的构造背景相类同,同时也可能是过去人们从未识别出的一个更广泛、更重要泛非期地体的一个组成部分。对于冈瓦纳古陆的再造有其潜在的意义。
A magma record on thermal-tectonic event in late Neoproterozoic in Qimantage rigion of Qinghai East Kunlun West part is discovered and its formation reason is judged as collision type granite body and the rock’s type is black fine mica erchang granite in piece and linen state.The intrusion body plane is an irregular ellipse,area 20 km2 and its long axis along North North West direction.The research result shows that the tectonic background in Qimantage rigion of Qinghai East Kunlun West part in late Neoproterozoic is similar with that in Aljinshun in that period and may be a component of a more extensine and more important Pan-African period earth body which never be recognised in the past.This will have a potential significance for reforming a Gondwana continent.
出处
《青海大学学报（自然科学版）》
2010年第5期56-60,共5页
Journal of Qinghai University(Natural Science)
基金
中国地质调查局1:25万库朗米其提幅地质调查项目(J46C003001)
关键词
东昆仑西段北坡祁漫塔格地区
泛非期
变质侵入岩体
构造背景
Qimantage rigion in the north slop of East Kunlun West area
Pan-African period
metamorphosis intrusion rock
tectonic background
