西秦岭不同矿带金矿床成矿流体及其物质来源探讨  

Discussion on the Ore-forming Fluids and Materials Sources of Gold Deposit in Different Metallogenic Belt of Western Qinling Mountains

作　　者：刘开君[1] 樊小龙[1] 余平辉[1] 曾亮[1] 成志雁[1] 马锦龙[1] 

机构地区：[1]兰州大学地质科学与矿产资源学院甘肃省西部矿产资源重点实验室,甘肃兰州730000

出　　处：《黄金科学技术》2015年第6期37-47,共11页Gold Science and Technology

基　　金：国家自然科学基金项目"甘肃文县阳山金矿中稀有气体同位素及其与流体主要组分的多元综合示踪"(编号:41173014)资助

摘　　要：西秦岭地区金矿资源丰富,找矿潜力巨大。为了探讨不同源区参与成矿的程度,对该区3个成矿亚带19个典型金矿床主成矿期流体包裹体及H、O、C、S稳定同位素特征进行研究,发现西秦岭地区成矿流体为岩浆水、变质水和大气降水混合来源,具有中低压、中低温和低盐度的特征,成矿物质为岩浆和沉积岩中碳酸盐岩的混合来源。西秦岭地区3个成矿亚带整体上具有明显的分带特征,自南向北其矿源具有从以混合来源为主向沉积来源过渡的趋势。Western Qinling Mountains is rich in gold resources, the area has a huge potential for prospecting.In order to investigate the mineralization extent of different ore-forming materilas, we analysis the fluid inclusion and stable isotope characteristics in the main mineralization stage of 19 main gold deposits from three metallogenic belts in Western Qinling Mountains,based on the results of previous studies.It was found that the metallogenic fluid of Western Qinling Mountain is a mixed origin consist by precipitation, metamorphic and magmatic water with characteristics low-pressure, low-temperature and low salinity, the ore-forming material is the mixed origin of magmatic and sedimentary rocks.From south to north,three metallogenic belts of Western Qinling Mountains have an obvious zonation features and it＇ s metallogenic fluid have a trend that shifting from mixed origin to deposit origin.

关 键 词：稳定同位素 流体包裹体 西秦岭金矿 松潘成矿带 南秦岭矿带 

分 类 号：P618.51[天文地球—矿床学]