云南镇沅金矿煌斑岩矿化过程中元素活动规律  

THE LAW OF ELEMENT ACTIVITIES IN THE PROCESSES OF MINERALIZATION FOR LAMPROPHYRES IN ZHENYUAN GOLD OREFIELD, YUNNAN PROVINCE

作　　者：黄智龙[1] 肖化云[1] 朱丹[1] 王联魁[2] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放室,贵阳550002 [2]中国科学院广州地球化学研究所,广州510640

出　　处：《矿物学报》1998年第3期337-343,共7页Acta Mineralogica Sinica

基　　金：中国科学院"西部之光"人才培养计划项目

摘　　要：广泛分布于云南镇流金矿、与金矿化在时间上、空间上密切共生的煌斑岩普遍遭受不同程度的蚀变，部分经历了矿化作用，根据岩石的蚀变相对强弱及是否矿化，本区煌斑岩可分成新鲜（弱蚀变）、蚀变、矿化三种。在用质量平衡方程计算了区内煌斑岩蚀变过程中元素活动规律的基础上，本文采用该方法计算了煌斑岩矿化过程中元素的活动规律。结果表明，引起本区煌斑岩矿化的流体为一种富含K2O、CaO、CO2、F、Cl、S、As、Sb、An、Ag等组分的流体；成矿元素（Au）的来源及稳定同位素显示这种流体具有多源性。Lamprophyres, which are widely spread over the Zhenyuan gold orefield, Yunnan Province, and are temporally and spatially related to gold mineralization, underwent different degrees of alteration and mineralization. According to the degree of alteration, lamprophyres in the orefield may be divided into fresh (weak alteration), altered and mineralized ones. On the basis of the law of element activities in the processes of lamprophyric alteration in the Zhenyuan gold orefield, this paper, using Mass Balance Equation, calculated the law of element activities in the processes of lamprophyric mineralization. The calculated results showed that the fluids responsible for lamprophyric mineralization are enriched in K2O, CaO, CO2, F, Cl, S, As, Sb, Au, and Ag. We considered that those mineralizing fluids are of multi-source.

关 键 词：煌斑岩 矿化过程 元素迁移 金矿床 

分 类 号：P618.510.4[天文地球—矿床学] P588.13[天文地球—地质学]