三山岛金矿床控矿构造特征及下盘找矿实践

三山岛金矿床（原莱州市仓上金矿床）埋藏浅,矿体厚度大,属我国大型露天开采金矿。由于露天开采设计境内的矿石基本回采完毕,面临着资源危机,为延长矿山服务年限,决定对矿床深部及矿体下盘进行成矿规律研究及找矿预测。根据矿床构造控矿特征和露天实际开采揭露地质情况,对主控矿构造蚀变带下盘的3号构造蚀变带进行分析、研究、论证,决定在露天坑下盘先施工探矿钻孔,结果探矿钻孔见到了矿。之后,施工竖井进行坑道探矿,在原矿体下盘探明了具有开采价值的工业矿体,实现了由露天向井下开采的生产转型,延长了矿山服务年限,对类似矿山有一定的借鉴意义。

Characteristics of Ore-controlling Structure of Sanshandao Gold Ore Deposit and Practice of Searching for Gold Ore in Lower Plate

Sanshandao gold deposit(Cangshang gold deposit in Laizhou) buries shallowly and has a big ore-body thickness,so it is one of China's large-scale open-air gold mining.As no ores in the open-air mining field could be exploited basically,the mine was facing a resource crisis.To extend the life of Mine,we decided to study the law of mineralization and prospecting forecast of the deep of the mine and the ore-body footwall.Analyzing,researching the No.3 structural alteration zone in the main and dominative struct...