Zircon isotopic ages from magnetite quartzites of the Jianping metamorphic complex, western Liaoning Province

作     者：A.Krner A.A.Nemchin 

作者机构：Institut für GeowissenschaftenUniversitat Mainz55099 MainzGermanyDepartment of Applied GeologyCurtin University of TechnologyP.O.Box U1987Perth WA6001Australia 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2000年第45卷第6期

页      面：547-551页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：Ministry of Education of the People's Republic of China MOE: 9700151 

主　　题：zircon age magnetite quartzite Jianping metamorphic complex Archaean western Liaoning Province. 

摘      要：Using the zircon Pb evaporation method and high precise ion microprobe analyses, zircon isotopic ages in supracrustal magnetite quartzites from Jianping metamorphic complex have been obtained. The results show that the deposition of the supracrustal rocks occurred around 2 552-2 520 Ma and the peak of granulite facies metamorphism reached at about 2 487 Ma; about (1 806±16) Ma, i.e. Mid-Proterozoic, the other possible metamorphic event with relatively low intensity happened in the study area. it is speculated that a likely tectonic setting where the Jianping metamorphic complex formed is an active Continental margin that is involved in Continental collision and crustal thickening shortly after its formation.