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Zircon U-Pb Age and Geological Significance of the Taizili Granitic Gneiss from Western Liaoning Province

ZHENG Pei-xi1,JIN Wei1,ZHOU Yan2,LI Jian1,ZHENG Chang-qing11.College of Earth Sciences,Jilin University,Changchun 130061,China2.Center of Analysis and Testing,Jilin University,Changchun 130026,China  
A suit of rock association of granitic gneiss and supracrustal xenoliths,described as the Dayingzi Formation,Jianping Group previously,is widely distributed in the Taizili area in western Liaoning Province.During the research of recent year,the Dayingzi Formation,Jianping Group was disintegrated into granitic plutonic gneiss and layered rock series.This granitic gneiss has similar features as those in the Yebaishou and the Caojiashaoguo gneiss in Dayingzi area.The granitic gneiss could represent the important Archean magma event in western Liaoning Province.The LA-ICP-MS dating method of single particle zircon of granitic gneiss suggests its magma emplacement age is about 2 522 Ma,an significance geological event in the western Liaoning Province.This dating also gives some chronological information for the Late Archean continental crust accretion event in the area.
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