普朗斑岩铜矿床外围地质特征与找矿浅析

普朗斑岩型铜矿是特提斯—喜马拉雅成矿域的一个超大型矿床。随着外围找矿工作的开展,矿区外围的地质情况逐渐被揭露。在实地的野外踏勘、详细的岩芯编录及典型剖面的研究基础上,对矿区外围地质特征进行研究,并将其对比首采区,希望对外围的找矿工作起到一定的指导作用。研究结果表明:1)矿区外围东部并非一个独立的成矿系统,应该是和首采区源自同一个成矿系统,底板厚实的角岩证实其深部找矿意义不大;2)矿区北段既有自己的成矿中心,且有一套完整的典型斑岩型铜矿床蚀变分带,故此判定其为一个相对独立的成矿系统,深部具备一定的找矿潜力;3)矿体与蚀变息息相关,矿体通常产在硅化钾化(KSi)带及绢英岩化(SiSe)带中,部分受构造的影响,产在其外。

Geological characteristics and prospecting of the periphery porphyry copper deposits in Pulang area

Pulang porphyry copper deposit is a super large porphyry copper deposit of the Tethys-Himalayas mineralization domain. With the work of peripheral prospecting, the geology of periphery has been exposed, gradually. This paper is combined with the reconnaissance of field, the detailed core document and the study of typical section, on the basis of this, studying peripheral geological characteristics of mining area, and contrasting with the first mining area, hoping that it would guide to the peripheral prospecting works. The results show that: (1) the eastern of the mining area is not an independence mineralization system, it should be derived from the same mineralization system with the first mining area, the thick hornstone in the deep confirmed that its prospecting insignificance;(2) The northern of the mining area has its own mineralization center as well as has a complete set of alteration zoning. This is similar to the typical porphyry copper deposit, so judging it as a independent mineralization system, and has a certain prospecting potential in the deep;(3) the ore bodies is closely related to alteration, the ore bodies always occur in the K-silicate alteration (KSi) belt and phyllic alteration (SiSe) belt, parts are influenced by the structure, occurring in the outer belt.