摘要
呷村式银多金属矿产于义敦岛弧发育晚期环境,在成因上与钙碱性火山岩系的偏酸性流纹质火山岩的海底喷发作用有关。矿带位于流纹质火山岩顶部与上覆结晶灰岩的接触界面附近,由上而下依次分为重晶石—铜铅锌银—铅锌三个矿体带。矿床地质的和地球物理的找矿标志明显。实践证明,以岛弧火山岩为对象,综合运用地质、物探、化探成果,在判定火山杂岩体的矿化地段,进行工程揭露验证是经济有效的找矿模式。
Gacun type argentiferous polymetallic deposits are confined to rhyolitic volcanic rock belonging to
calco - alkaline volcanic suite related to submarine eruption in the late Yidun island arc invironment.
The ore belt occurs in contact between the rhyolitic volcanic rock and overlying crystalline limestone. In ascending order, the ores may be divided into three zones : Pb - Zn ore, Cu - Pb - Zn - Ag ore and barite zones. Geological - geophysical criteria for ore prospecting are clear, prospecting practice indi-cates that on the basis of geological,geochemical and geophysical data,making a prospecting in miner-alized volcanic complex in the island arc environment is an effective and economic prosecting model.
出处
《四川地质学报》
1993年第3期217-222,共6页
Acta Geologica Sichuan
关键词
呷村银多金属矿
流纹质火山岩
岛弧环境
找矿模式
Gacun argentiferous polymetallic deposit,rhyolitic volcanic rock,island arc environ-ment, prosppecting model.
