拉拉铜矿地质特征及找矿标志

Geological Characteristics and Prospecting Criteria of the Lala Copper Deposit

拉拉铜矿位于康滇地轴中段东缘,攀西-东川拗拉槽北部,金沙江褶断带与川滇构造带交接复合部位的河口复式背斜南翼。区域内出露前震旦系(Pt1)、震旦系至志留系、二叠系、三叠系至白垩系、新近系至第四系地层。矿区地质构造复杂,岩浆岩分布广泛。与矿化有关的围岩蚀变广泛分布。矿石矿物以黄铜矿、黄铁矿及磁铁矿为主,次有辉钼矿、斑铜矿等。找矿标志主要为岩石建造,地层,构造,矿物及氧化带,航磁、重力异常,地球化学异常。

The Lala copper deposit is located in the southern limb of the Hekou anticlinorium, joint part between Jinsha River fold-thrust belt and Sichuan Yunnan tectonic belt, north of the Panxi - Dongchuan aulacogen, east edge of the middle section in Xikang Yunnan axis. The strata outcropping in this region include preSinian （Ph）, Sinian to Silurian, Triassic, Permian to Cretaceous, Neogene to Quaternary. Geological structure of the mining area is complex, and magmatie rocks distribute widely. The wall rock alteration associated with mineralization have a wide distribution. Ore minerals are mainly chalcopyrite, pyrite and magnetite, with minor molybdenite, bornite, etc. The main prospecting criteria are rock formations, strata, structure, minerals and oxidation zone, aeromagnetic and gravitational anomaly, geochemical anomaly.