地质学报（英文版）2004，Vol.78Issue(2)：428-434,7.
40Ar-39Ar Age of K-feldspar from K- feldspar Granite in the Qiaohuote Copper Deposit, Bayanbulak, Xinjiang, and Its Geological Significance
40Ar-39Ar Age of K-feldspar from K- feldspar Granite in the Qiaohuote Copper Deposit, Bayanbulak, Xinjiang, and Its Geological Significance
摘要
Abstract
By using the 40Ar-39Ar chronological method to date K-feldspar from K-feldspar granite in the Qiaohuote copper district, the authors obtained a plateau age of 274.78±0.44 Ma and an isochron age of 272.7±3.0 Ma. Because there is no tectonic deformation overprinted or hydrothermal alteration in the K-feldspar granite intrusion after its emplacement, the 40Ar-39Ar age represents the crystallization age of K-feldspar in K-feldspar granite, i.e. the late crystallization age of the K-feldspar granite intrusion, which indicates that the K-feldspar granite formed in the intraplate extensional stage during the Early Permian. Moreover, based on the spatial relationship between the K-feldspar granite intrusion and copper orebodies, variations of copper ore grade, REE characteristics of K-feldspar granite and copper ores, and H and O isotopic compositions of fluid inclusions in copper ores, the metallogenesis of the Qiaohuote copper deposit is directly related to intrusive activities of the K-feldspar granite, and thus the crystallization age of K-feldspar in the granite approximately approaches the metallogenic epoch of the Qiaohuote copper deposit.关键词
40Ar-39Ar age, K-feldspar granite, Qiaohuote, XinjiangKey words
40Ar-39Ar age, K-feldspar granite, Qiaohuote, Xinjiang分类
天文与地球科学引用本文复制引用
WANG Zhiliang ,MAO Jingwen,YANG Jianmin,CHEN Wen,ZHANG Zuoheng..40Ar-39Ar Age of K-feldspar from K- feldspar Granite in the Qiaohuote Copper Deposit, Bayanbulak, Xinjiang, and Its Geological Significance[J].地质学报（英文版）,2004,78(2):428-434,7.基金项目
This study was supported by the New Round Geological Survey Project (No. 200310200001-3,DKD2001027-2) and the State Key Basic Research Program of the People's Republic of China (No.G1999043216). （No. 200310200001-3,DKD2001027-2）
