现代地质2018，Vol.32Issue(1)：1-15,15.DOI:10.19657/j.geoscience.1000-8527.2018.01.01
阿尔金断裂东段红柳峡早白垩世晚期岩浆事件及其区域构造意义
Late Early Cretaceous Magmatic Event in Hongliuxia in Eastern Sector of the Altyn Tagh Fault, and Its Regional Tectonic Implications
摘要
Abstract
This paper made a comprehensive study on the petrology,zircon morphology and LA-ICP-MS U-Pb geochronology of the Hongliuxia and its peripheral volcanic rocks in the eastern sector of the Altyn Tagh Fault.The results show that there are two types of zircons in the samples.One is a type of long-columnar magmatic zircons sampled from the volcanic neck,whose weighted average age is (109.0 ± 1.6) Ma (late Early Cretaceous),and it represents the formation age of Hongliuxia volcanic rocks.This age agrees well with previous results through different approaches.The other is a type of sub-rounded or oval inherited zircons sampled from the peripheral basalts,and most of them have the core mantle structure.The age distribution ranges from (138 ±2) to (2,376 ±74) Ma,which show the diverse age peaks.These inherited zircons are all captured from the Lower Cretaceous or/and earlier strata during the rising of basaltic magma.Their age peaks closely respond tothe complex multi-phase magma and tectonic events in the late Early Cretaceous or earlier time of the Altyn Tagh Fault.In addition,part of the age peaks coincident with the age of Paleozoic granite in the southern Altyn Tagh Terrane suggests that the Altyn Tagh Terrane was once connected to the Qilian Block.关键词
阿尔金断裂/红柳峡/玄武岩/继承锆石/LA-ICP-MS U-Pb年龄Key words
Altyn Tagh Fault/Hongliuxia/basalt/inherited zircon/LA-ICP-MS U-Pb age分类
天文与地球科学引用本文复制引用
王训练,周洪瑞,王振涛,高正升,杨利超,张海军,于子栋,鞠鹏程..阿尔金断裂东段红柳峡早白垩世晚期岩浆事件及其区域构造意义[J].现代地质,2018,32(1):1-15,15.基金项目
甘肃玉门国家公园地质景观基础地质研究. （）
