江西九江地区丁家山矿区深部和外围地球化学找矿与成矿预测  

Geochemical exploration and metallogenic prediction in the depth and outskirts of the Dingjiashan ore district,Jiujiang area,Jiangxi Province

作　　者：严如忠 龚敏[1,2] 袁承先 任利民[2] 闭向阳[2] 曾键年[2] 马振东[2] 

机构地区：[1]江西省地矿资源勘查开发中心,江西南昌330030 [2]中国地质大学,湖北武汉430074

出　　处：《地质通报》2011年第8期1312-1320,共9页Geological Bulletin of China

基　　金：中国地质调查局<资源与环境地球化学勘查与评价方法技术研究和推广>子项目(编号:1212010660404)

摘　　要：通过对丁家山矿区外围土壤剖面、土壤汞气和岩石剖面的测量,结合重新编制的丁家山矿区的地质地球化学找矿模型,对丁家山矿区深部和外围进行成矿预测。结果表明,丁家山矿区外围土壤中Hg、Ag、Au等元素异常和土壤壤中汞气、热释汞异常明显。异常与下伏侵入的燕山期岩脉密切相关,花岗闪长斑岩、石英闪长玢岩侵入及其成矿(矿化)作用是元素成晕的主导机制。将丁家山矿区与城门山矿区对比,认为丁家山矿区及其外围具有较好的成矿前景,应注意在丁家山矿区外围志留系砂岩中寻找银金矿化,在其深部(-500～-1000m)寻找以钼(铜)矿化为主的矿体。Through the measurement of soil profile,soil mercury gas and rock profile in the outskirts of the Dingjiashan ore district and the re-establishment of the geological and geochemical exploration model,the authors made the metallogenic prediction in the depth and outskirts of the ore district.The results show that there exist obvious Hg,Ag,Au soil anomalies and soil mercury gas anomalies as well as heat-released mercury anomalies,which are evidently in close relation to the Yanshanian intrusive dykes,intrusions and mineralization of granodiorite porphyry,with quartz diorite porphyry being the dominant mechanism of the anomalies.A comparison with the Chengmenshan ore district shows that there exist good metallogenic prospects in the depth and outskirts of the Dingjiashan ore district.It should be noted that silver-gold mineralization in Silurian sandstone is likely to be found at the periphery of the Dingjiashan ore district whereas molybdenum（copper） mineralization might be found in the depth（-500 to-1000 m）.

关 键 词：江西 丁家山矿区 深部和外围 地球化学找矿 

分 类 号：P618.5[天文地球—矿床学] P618.65[天文地球—地质学]