恒山鹿沟金矿形成的物理化学条件及同位素地球化学

Physical-Chemical Conditions of Lugou Gold Deposit and Their Isotope Geochemistry in Hengshan Mountains of Shanxi

本文对恒山东段鹿沟金矿形成的温度，压力，ｆＣＯ＿２，ｆＯ＿２，成矿溶液的成分，盐度，ｐＨ值，Ｅｈ值进行了系统的论述。同时利用硫、铅、氧、氢、锡同位素资料，对成矿时代、物质来源进行了论证，得出成矿物质主要来自围岩，成矿溶液以变质水为主的结论。溶液性质属Ｎａ￣＋－Ｃａ￣２＋－Ｃｌ￣－－ＳＯ＿４￣２－型，富ＣＯ＿２，高盐度，偏酸性。成矿时代与区域变质年龄一致，为２２１４．５６４．１Ｍａ。燕山期岩浆活动对其有改造作用。

In this paper the author has systematically discussed the temperature,the pressure,thefugacities of oxygen and CO_2 and the composition,salinity,pH value and Eh value of miner-alizing solution of Lugou gold deposit in the east of the Hengshan mountains. In the mean-time, the author also discussed the metallogenetic epoch and source material in the light ofisotope data of S,Pb,O_2,H_2, Sr. The results show that the metallogenic materials werefrom the country rock,and the mineralizing solution were mainly the metamorphic water, Thetype of the solution belongs to Na￣+-Ca￣2+-Cl￣-S_4￣2-, with rich CO2, high salinity and moreacidity.The metallogenetic epoch and regional metamorphism are concordant,with an age of2214.5+64.1 Ma,and transformed by magmatic activity of Yanshan period。