典型文献
Discovery and Geological Significance of an Indosinian (ca. 244 Ma) Metamorphic Event in the Langshan Area, Western Inner Mongolia, China:New Evidence from Zircon LA-ICP-MS U-Pb Dating
文献摘要：
The Langshan Group is an important constituent of the Precambrian metamorphic rocks in the Langshan area. The accurate determination of its metamorphic age is of great scientific sig-nificance for the further study of the Precambrian geological evolution in the region. Disputes remain regarding the metamorphism and deformation overprinting of the Langshan Group. This paper pres-ents a detailed study comprising a field geological investigation, petrological observations, and zircon U-Pb aging of garnet-bearing mica quartz schists in the BangBang District. The result of detrital zircon U-Pb dating from the metamorphosed volcanic sedimentary rock series and geological investigation of the garnet-bearing mica quartz schists suggest the strata formed in the Neoproterozoic. The results from cathodoluminescence (CL) image analysis and U-Pb dating of zircons indicate a large number of meta-morphic zircons exist in the garnet-bearing mica quartz schists. The metamorphic overgrowth rims of zircon from two samples were analyzed by LA-ICP-MS. The 206Pb/238U weighted average age of ca. 244 Ma of the zircon metamorphism rims represents the timing of Indosinian greenschist-amphibolite fa-cies metamorphism in the Langshan area, which may be in response to the collision-type orogeny of the North China and Siberian plates in the Late Paleozoic. Acid-intermediate magmatic intrusive activities occurred in the Langshan area, and metamorphic events developed at the same time or at a later stage during the closure of the Paleo-Asian Ocean.
文献关键词：
中图分类号：
作者姓名：
Yan Yan;Runmin Peng;Siyu Chen;Shuangfei Li
作者机构：
School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China;School of Earth and Space Sciences,Peking University,Beijing 100871,China;No.8 Institute of Geology and Mineral Resources of Shandong Province,Rizhao 276826,China
文献出处：
引用格式：
[1]Yan Yan;Runmin Peng;Siyu Chen;Shuangfei Li-.Discovery and Geological Significance of an Indosinian (ca. 244 Ma) Metamorphic Event in the Langshan Area, Western Inner Mongolia, China:New Evidence from Zircon LA-ICP-MS U-Pb Dating)[J].地球科学学刊（英文版）,2022(04):993-1006
A类：
Langshan,schists,BangBang,metamorphosed
B类：
Discovery,Geological,Significance,Indosinian,Ma,Metamorphic,Event,Area,Inner,Mongolia,China,New,Evidence,from,Zircon,LA,ICP,Dating,Group,important,constituent,Precambrian,metamorphic,rocks,area,accurate,determination,its,great,scientific,sig,further,study,geological,evolution,region,Disputes,remain,regarding,metamorphism,deformation,overprinting,This,paper,detailed,comprising,field,investigation,petrological,observations,aging,garnet,bearing,mica,quartz,District,detrital,dating,volcanic,sedimentary,series,suggest,strata,formed,Neoproterozoic,results,cathodoluminescence,CL,image,analysis,zircons,indicate,large,number,exist,overgrowth,rims,two,samples,were,analyzed,by,206Pb,238U,weighted,average,represents,timing,greenschist,amphibolite,fa,cies,which,may,response,collision,type,orogeny,North,Siberian,plates,Late,Paleozoic,Acid,intermediate,magmatic,intrusive,activities,occurred,events,developed,same,later,stage,during,closure,Asian,Ocean
AB值：
0.529473
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
