摘要
本文通过对内蒙古架子山斑岩型钼(银)矿床7件辉钼矿样品的Re-Os同位素测定与分析,获得了辉钼矿的模式年龄介于143.1±2.1~147.2±2.4 Ma之间,加权平均年龄为145.8±1.4 Ma(MSWD=1.5),对应的等时线年龄为147.4±1.4 Ma (MSWD=1.5),表明架子山钼(银)矿床形成于晚侏罗世,属中国东部燕山期大规模钼成矿期成矿。架子山钼(银)矿床Re含量在37.62×10^(-6)~401.34×10^(-6)之间,平均值为121.28×10^(-6),表明架子山钼(银)矿床的成矿物质具有壳幔混源特征。
In this paper, the Re-Os isotopic dating of seven molybdenite samples from the Jiazishan Mo(Ag) deposit, Inner Mongolia shows model ages from 143.1±2.1 Ma to 147.2±2.4 Ma, averaging 145.8±1.4 Ma(MSWD=1.5), and a good isochronic age of 147.4±1.4 Ma(MSWD=1.5). It indicates that the Jiazishan Mo(Ag) deposit was formed in the late Jurassic which belongs to the large-scale Mo mineralization of the Yanshan period in eastern China. The Re content of the Jiazishan Mo(Ag) deposit is between 37.62×10^(-6)and 401.34×10^(-6), averaging 121.28×10^(-6). As Re content in molybdenite can be used as an important indicator on source of ore-forming material, it is likely that the ore-forming material in the Jiazishan Mo(Ag) deposit was derived from the crust-mantle mixed source.
作者
王振亮
赵克强
杨剑洲
付燕刚
席明杰
李超
邓友茂
陆桂福
WANG Zhenliang;ZHAO Keqiang;YANG Jianzhou;FU Yangang;XI Mingjie;LI Chao;DENG Youmao;LU Guifu(National Center for Geological Exploration Technology,Langfang,Hebei 065000,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang,Hebei 065000,China;National Research Center for Geoanalysis,Beijing100037,China)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2021年第12期3768-3777,共10页
Acta Geologica Sinica
基金
国家重点研发计划项目(编号2018YFE0208300)
中国地质科学院基本科研业务费项目(编号AS2017J04)联合资助的成果。
