摘要
垅西金矿是东天山地区较为典型的石英脉型金矿床 ,文章对该矿床进行了流体包裹体的温度测定、气液相成分分析、稀土元素分析和氢氧同位素分析。研究结果表明 ,垅西金矿的成矿温度为 2 2 2～ 313℃ ,成矿深度为 2～ 3.2km ,属中成中温热液矿床 ;流体包裹体中H2 O和CO2 为主要气相成分 ,Na+ 、K+ 和Cl-为主要液相成分 ;成矿流体主要来自岩浆水 ,晚期混入少量大气降水 ;
The Longxi gold deposit, located in the Dananhu_Tousuquan Island Arc Belt north of Kanggur ductile shear zone, is a typical quartz vein gold deposit. It is hosted in the Hercynian plagiogranite porphyry which intruded into basalt and andesite of the Lower Carboniferous Qi'eshan Group. Its orebodies are completely controlled by approximately EW_trending ductile_brittle or brittle fractures. In this paper, temperatures, components, rare earth elements and H_O isotopes of fluid inclusions from the Longxi gold deposit were determined. According to the temperature and gas_liquid component data of fluid inclusions, the ore_forming temperatures range from 222℃ to 313℃, the ore_forming depths vary from 3.2 km to 2 km, the gas components of fluid inclusions are mainly H 2O and CO 2, and the liquid components of fluid inclusions are mainly Na +, K +and Cl -. The H_O isotopic data and REE composition of fluid inclusions indicate that the ore_forming fluids were mainly magmatic water mixed at the late ore_forming stage with small amounts of meteoric water, and the ore_forming metallic materials were derived from basalt and andesite of the Lower Carboniferous Qi'eshan Group.
出处
《矿床地质》
CAS
CSCD
北大核心
2003年第2期208-216,共9页
Mineral Deposits
基金
国土资源大调查项目 ( 2 0 0 3 10 2 0 0 0 0 1_3 )
国家重点基础研究项目 ( 2 0 0 1CB40 980 7和G19990 43 2 16)资助
