%0 Journal Article
%T Electron microprobe monazite Th-Pb dating and its constraints on multi-stage metamorphism of low-pressure pelitic granulite from the Jingshan Group in the Jiaobei terrane
%A Zhou Xiwen
%A Wei Chunjing
%A Geng Yuansheng
%A Zhang Lifei
%A <br>ZHOU Xiwen
%A WEI Chunjing
%A GENG Yuansheng & ZHANG Lifei . Institute of Geology
%A Chinese Academy of Geological Sciences
%A Bei- jing
%A China
%A . The Key Laboratory of Orogenic Belts and Crustal Evolution
%A School of Earth and Space Sciences
%A Peking University
%A Beijing
%A China
%J 科学通报(英文版)
%D 2005
%I 
%X Monazites from low-pressure pelitic granulite of the Jingshan Group in the Jiaobei terrane were dated by the electron microprobe method. Three stages of metamorphic age at 1720±15 Ma, 1687±16 Ma and 1568±15 Ma were yielded by constructing age mapping for zoned monazites and PbO-ThO2* isochron diagram for unzoned monazites, respectively. The first age was interpreted as the age of an early amphibolite-facies metamorphism, the second age as the peak granulite-facies, and the last age as uplifting of the granulite unit. These ages are the first geochronologic data for the low-pressure pelitic granulites in the Jingshan Group, and thus are of important significance when discussing the tectono-metamorphic evolution of the Jiaobei terrane.
%K low pressure
%K pelitic granulite
%K electron microprobe
%K monazite Th-Pb dating
%K multi-stage metamorphism<br>电子微探针
%K 独居石
%K 泥质岩
%K 麻粒岩
%K 变质作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=53CA1D24BACAE0A77F2216F50F15DD22&yid=2DD7160C83D0ACED&vid=771152D1ADC1C0EB&iid=F3090AE9B60B7ED1&sid=9F481C73BF82C48F&eid=C368DFEE1EA2C91D&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=2&reference_num=18