摘要
以铜陵胡村矽卡岩型铜矿为研究对象,选择与成矿关系密切的花岗闪长岩,在22MPa恒压、不间断流动条件下,与纯水在叠层反应器中进行水-岩反应动力学实验研究。结果表明,水-岩反应速率与流体流速成反相关,与流体在体系内的停顿时间成正相关。铜陵地区Cu,Mo等金属矿化普遍分布于岩体附近可能与此有关。成矿流体中的Cu可能主要是在超临界态流体中迁移,在低于临界态条件下从流体中析出;而在体系温度较低时,主要成矿元素Cu难以从岩石中溶出。在相同温度条件下,Cu,Zn等成矿元素的溶解速率存在较大的差异,可能是导致这些成矿元素在空间上出现分带的原因之一。
An experiment of water-rock interaction in the packed bed reactor between granodiorite and pure water under the condition of stable pressure of 22 MPa and continuous current has been performed to study the formation process of the Hucun skarn copper deposit in Tongling, Anhui. The experimental results show that the rates of water-rock interaction are inversely correlated to the velocity of water flow and positively correlatied to the residence time of the water in the system. These results may explain distribution of the copper, molybdenum etc. mineralizations around the pluton. It is inferred that the copper in the ore-forming fluid might be transferred in a supercritical state and be separated out under the critical state. The leaching of copper from the rock is difficult at low temperatures. The experiment indicats that the dissolution rates of copper, zinc and other ore-forming elements are different under the same temperatures, which might be one of reasons for zoning of the ore-forming elements.
出处
《高校地质学报》
CAS
CSCD
北大核心
2007年第2期261-271,共11页
Geological Journal of China Universities
基金
国土资源部专项研究计划(20010103)
中国地质科学院矿产资源研究所地球化学动力学开放实验室资助
关键词
水-岩反应实验
化学动力学
矽卡岩型铜矿
胡村
安徽
experiment
water-rock interaction
chemical kinetics
skarn copper deposit
Hucun
Anhui Province
