摘要
博格达造山带黑沟环状花岗杂岩,中心为二长花岗岩,内环为花岗闪长岩,外环为辉长岩、(辉石)闪长岩、石英闪长岩、英云闪长岩。对闪长岩、花岗闪长岩和二长花岗岩进行SHRIMP锆石U-Pb定年,分别获得了309.0±6.2 Ma、311.1±3.8 Ma和308.9±4.4 Ma的结晶年龄,均为晚石炭世。该岩体可能为博格达裂谷闭合,进入板内伸展环境的产物。
The rock in Heigou ring granitic complex in Bogda orogenic belt distributed in ring-shaped.The center is monzonitic granite,while the inner ring is granodiorite,the outer ring consists of gabbro,(pyroxene) diorite,quartz diorite and tonalite.The detailed chronology research by zircon SHRIMP U -Pb could date from the diorite,granodiorite and monzonitic granite,obtained the crystallization age of 309.0 ±6.2 Ma,311 ±3.8 Ma,308.9 ±4.4 Ma respectively,representing their intrusive age of late Carboniferous.The Heigou ring gra-nitic complex is the product of a tectonic framework transformation from the closing of Bogda rift to orogenic up-lift stage.
出处
《桂林理工大学学报》
CAS
北大核心
2015年第2期251-256,共6页
Journal of Guilin University of Technology
基金
中国地质调查局项目(12120113042500)
作者简介
施文翔（1984-），男，工程师，研究方向：区域地质调查，lizhiyang5453@163．com。
