The Metallogenic Age of Changshanhao Gold Deposit in Inner Mongolia
The Changshanhao gold deposit is a super large gold deposit found in the Bayan Obo belt in recent years, and one of the largest gold mine in China.This paper is focused on the relationship of the magmatic activity and mineralization in the Changshanhao gold deposit.The 40Ar/39Ar isotopic dating of biotite and muscovite from the auriferous quartz veins in the Changshanhao gold deposit indicated that the formation age of biotite was 256.3±1.8Ma and the formation age of muscovite was from 250.9±1.5 Ma to 246.0 ±1.6 Ma.Combined with the dating results of the region rock of predecessors, it is inferred that large-scale magmatic activity is not only the important heat source for the mineralization,but also the main material source for the mineralization.The hydrothermal precipitation of ore-forming materials from the hydrothermal system is the main ore-forming process in the late Magmatic evolution, with the temperature and the pressure decreasing, biotite and muscovite in the ore-beating hydrothermal successively crystallized,and at the same time, gold and other ore-forming elements in the ore-bearing hydrothermal precipitated and gathered.
The Changshanhao gold deposit Ar-Ar dating magmatic activity mineralization Inner Mongolia
CAO Yi NIE Fengjun XIAO Wei
Institute of Mineral Resources,CAGS,Beijing 100037,China Institute of Mineral Resources,CAGS,Beijing 100037,China;Beijing Municipal Commission of Commerce In
国际会议
第十八届凯洛林国际地质学术研讨会(The 18th Kerulien International Conference on Geological)
石家庄
英文
288-291
2013-09-20（万方平台首次上网日期，不代表论文的发表时间）