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李博秦,刘铭涛,冯宝山,张有军,李宛荫.新疆于田县阿羌火山岩的时代再讨论[J].地质通报,2017,(7):1169-1174.
新疆于田县阿羌火山岩的时代再讨论    点此下载全文
李博秦1  刘铭涛1  冯宝山1  张有军1  李宛荫2
1. 天津华北地质勘查局, 天津 300170;
2. 上海财经大学浙江学院, 浙江 金华 321013
基金项目:天津市国土资源和房屋管理局科研项目《新疆和田东三县快速勘查找矿技术方法及远景评价》(编号:TGPC-2014-D-0239)
DOI:
摘要:
      阿羌火山岩作为一个独立的地质构造单元在西昆仑的地质演化中扮演着重要的角色。为了调查阿羌火山岩的年龄,在阿羌火山岩的不同部位中采集了5件样品,进行LA-MC-ICP-MS锆石U-Pb定年。其中2件样品没有获得有效年龄,另外3件样品得到4个年龄数据:485Ma、461Ma、432Ma、145Ma,反映该带经历了加里东、华力西、燕山等运动。该结果对重新认识和研究西昆仑的地质演化历史具有重要的地质意义。
关键词:阿羌火山岩  LA-MC-ICP-MS锆石 U-Pb定年  地质演化
A discussion on the age of Aqiang volcanic rocks from Yutian County, Xinji-ang    Download Fulltext
LI Boqin1  LIU Mingtao1  FENG Baoshan1  ZHANG Youjun1  LI Wanyin2
1. Tianjin North China Geological Exploration Bureau, Tianjin 300170, China;
2. Shanghai University of Finance and Economics Zhejiang College, Jinhua 321013, Zhejiang, China
Fund Project:
Abstract:
      As an independent geological tectonic unit, the Aqiang volcanic rocks play an important role in the geological evolution of the West Kunlun Mountains. In order to study the ages of the Aqiang volcanic rocks, the authors collected five samples from different parts of the Aqiang volcanic rocks. The zircon U-Pb age was obtained by LA-MC-ICP-MS. Two of the samples failed to get effec-tive zircon U-Pb ages, whereas four zircon U-Pb ages were obtained from the other three samples:485Ma, 461Ma, 432Ma, and 145Ma, suggesting that the belt experienced Caledonian, Variscan activities, such as Yanshanian movement. This result is of great sig-nificance for the study of the geological evolution history of West Kunlun Mountains.
Keywords:Aqiang volcanic rocks  LA-MC-ICP-MS zircon U-Pb dating  geological evolution
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