新疆尉犁县风屏北山片麻杂岩地质特征及原岩成因探讨  

Geological features of the northern Fengpingshan gneiss complex and protolith genesis of Weili County,Xinjiang

作　　者：刘延军[1] 时玉芹 王伯勋[1] 郑鹤龄[1] 姚建民[1] 

机构地区：[1]吉林省第三地质调查所,吉林四平136000

出　　处：《吉林地质》2009年第1期18-22,共5页Jilin Geology

摘　　要：对风屏北山片麻杂岩进行了同位素年龄确定,采用SHR IMP放射性同位素测年,确定同位素定年结果为2 484±20 Ma。根据岩石化学、稀土、微量元素等特征,对片麻杂岩进行了分析研究,认为该片麻岩原岩为I型花岗岩,经区域变质作用形成。The isotopic age of the northern Fengpingshan gneiss complex was determined using SHRIMP radioactive isotope dating, the result shows that isotopic age is 2 484±20 Ma. The gneiss complex was analyzed on the basis of the petrochemistry, RE and microelement characteristics. It is considered that gneiss complex belongs toⅠ type granite through the regional metamorphism.

关 键 词：片麻杂岩 原岩恢复 I型花岗岩 原岩成因 

分 类 号：P588.24[天文地球—岩石学]