三道湾子金矿床流体包裹体及稳定同位素地球化学特征  

FLUID INCLUSION AND STABLE ISOTOPE GEOCHEMISTRY OF SANDAOWANZI GOLD DEPOSIT

作　　者：吕军[1,2] 王建民 岳帮江 王洪波 于荣文 赵立国 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室 [2]黑龙江地质调查院齐齐哈尔分院,齐齐哈尔161005 [3]黑龙江地质调查院齐齐哈尔分院

出　　处：《地质与勘探》2005年第3期33-37,共5页Geology and Exploration

基　　金：黑龙江省矿产资源补偿费项目(编号:SD2002-29);中国地质大学地质过程与矿产资源国家重点实验室及中国地质大学岩石圈构造;深部过程及探测技术教育部重点实验室资助。

摘　　要：三道湾子金矿位于大兴安岭燕山期成矿带东南部,为典型的石英脉型金矿。通过对矿床地质特征、成矿期次及硫、氢、氧同位素组成和流体包裹体测温研究,讨论了成矿流体的来源及矿床形成的温度。黄铁矿δ34S值为-1.1‰～1.7‰,显示硫具地幔来源的特点;石英δ18O水值为-15.3‰～-9.9‰,δDV-SMOW值为-110‰～-85‰,说明成矿流体主要为大气降水;流体包裹体均一温度为181～267℃;表明三道湾子金矿为与火山热液有关的中-低温浅成热液矿床。Sandaowanzi gold deposit is located in the southeast of Daxinganling metallogenic belt during Yanshanian epoch. It is a typical quartz vein gold deposit. Geological features, mineralizing periods, fluid inclusions and S, H, O isotope compositions are discussed to identify ore-forming source and temperature. δ^(34)S values of pyrite range from -1.1‰ to 1.7‰, showing mantle-derived sulfur character. δ^(18)O water values of ore-forming fluids responsible for quartz formation are estimated to be -15.3‰ ~ -9.9‰. δD (V-SMOW) values of inclusion fluids in quartz are measured to be -110‰ ~ -85‰. The meteoric water was dominated. Homogenization temperatures are from 181 to 267℃. The Sandaowanzi gold deposit is a mesothermal-epithermal volcanogenic gold deposit.

关 键 词：三道湾子金矿 地质特征 流体包裹体 稳定同位素 

分 类 号：P618.51[天文地球—矿床学]