湖南省沅陵县李家溪金异常地球化学特征及资源远景预测  

The geochemical characteristics of Lijiaxi Au anomaly and resource potential prediction in Yuanling County of Hunan Province

作　　者：陈碧莹 CHEN Biying(The Geological Team No.247 of Hunan Provincial Nonferrous Geological Exploration Bureau,Changsha 410129,Hunan,China)

机构地区：[1]湖南省有色地质勘查局二四七队,湖南长沙410129

出　　处：《矿产与地质》2019年第6期1062-1067,1073,共7页Mineral Resources and Geology

基　　金：中国地质调查局矿产地质调查评价专项(项目编号:12120115028801)资助。

摘　　要：沅陵县李家溪金异常产于山金坳背斜核部马底驿组含金地层,出现元素组合以Au为主,伴生W、Sb、As、Hg、Ag、Mo、Ba等元素。经与沅陵地区产于马底驿组中的金矿对比,李家溪金异常特征与已知金矿类似。从已知金矿来看,异常规模与金矿储量存在一定关系,异常规模越大,金储量越大,李家溪金异常规模较大,意味着其蕴含的金资源量较大。异常区原有一金矿点,但异常规模大于矿化规模,经异常查证,发现大小5条金矿化体,矿化规模与异常规模相当,进一步证实异常由金矿化引起。采用元素丰度模型预测其远景资源量为6.89t,具有一中型金矿规模找矿前景。Lijiaxi gold anomaly is hosted in the gold-bearing strata of Madiyi Formation in the core of Shanjinao anticline.The element assemblage of anomaly is mainly Au,accompanied by W,Sb,As,Hg,Ag,Mo and Ba.Compared with the gold deposits in the strata of Madiyi Formation in Yuanling area,Lijiaxi gold anomaly is similar to those of known gold deposits in this area.In view of the known gold deposits,there is a certain relationship between the anomaly scale and gold reserve.The larger the anomaly scale is,the larger the gold reserve is.For the large scale of Lijiaxi gold anomaly,it means that there is a large amount of gold resources in Lijiaxi.There is an original gold occurrence spot in the anomaly area,but the anomaly scale is larger than the gold mineralization scale.After geological investigation of anomaly,five gold veins are found out.The gold mineralization scale is similar to the anomaly scale.It is further confirmed that gold mineralization is the cause of the gold anomaly.By using element abundance model,its prospective resources are predicted for 6.89 tons of gold.There is a prospecting potential of gold deposit of middle scale in this area.

关 键 词：李家溪金异常 元素丰度模型 资源远景预测 地球化学特征 湖南省 

分 类 号：P632[天文地球—地质矿产勘探] P618.51[天文地球—地质学]