摘要
矿区地处印度尼西亚爪哇岛中-新生代火山岛弧带西端,属西爪哇近东西向茂物至吉古德渐新世-全新世构造岩浆带。矿体主要赋存于Qvu英安质-流纹质火山岩中断裂带中。Ⅰ号矿体位于矿区中部,矿体呈豆荚状、透镜状,走向总体近南北,倾向东,倾角69～83°。根据地表矿体露头和钻孔见矿情况,推测矿体长大于1000m,矿体沿走向往北、往南均延伸出矿界,地表出露宽4.0～22.50m。成因机制应为:在岛弧环境下大规模火山次火山活动为成矿提供了足够的热量,与大气降水循环形成流体对流系统,萃取成矿物质,含矿热液沿深部断裂向上向北部斜向运移,在近地表开放环境下温度压力降低,金属沉淀沿断裂带充填成矿。
The mining area is located in the western end of the Mesozoic-Cenozoic volcanic island arc belt in Java Island,Indonesia, and belongs to the EW-trending Bogor-Jigoud Oligocene-Holocene tectono-magmatic belt in West Java. The ore bodies are mainly hosted in the Qvu fracture zone of the dacitic rhyolite volcanic rocks. The No. 1 orebody is located in the middle of the mining area. The orebody is pod-shaped and lenticular. It strikes nearly north-south and inclines to the East with an inclination of 69-83 degrees. According to the outcrop of surface orebody and the occurrence of ore in boreholes, it is inferred that the orebody is longer than 1000m, and the orebody extends northward and southward along the strike, and the outcrop width is 4.0-22.50m. The genetic mechanism should be as follows： large-scale volcanic subvolcanic activities in the island arc environment provide enough heat for mineralization, circulate with atmospheric precipitation to form fluid convection system, extract ore-forming materials, ore-bearing hydrothermal fluid migrates obliquely along deep faults to the north, temperature and pressure decrease in the near-surface open environment, and metal precipitation along the fault. Fracture zone filling mineralization.
作者
徐增裕
XU Zeng-yu(China Resources Exploration Limited by Share Ltd.,BeiJing 100089,China)
出处
《世界有色金属》
2018年第16期122-123,125,共3页
World Nonferrous Metals
关键词
吉布吉斯
铅锌矿
矿体特征
矿床成因
Gibb Giese
lead-zinc deposit
ore body characteristics
ore genesis
