四川木里梭罗沟金矿床地质特征及控矿因素分析

Geological characteristics and ore-controlling factors analysis of Suoluogou Gold Deposit,Muli County,Sichuan Province

梭罗沟金矿床是产于甘孜—理塘成矿带南端晚三叠统海相火山岩建造中的超大型金矿床。通过对矿床地质、围岩蚀变等特征的研究,分析其控矿因素,认为梭罗沟金矿床不完全受地层岩性的制约,成矿作用主要受近EW向构造控制,深部(隐伏)岩浆活动不仅为含矿热液提供了热动力,可能也是主要的成矿流体来源。矿石结构构造、矿物组成及金的赋存状态特征表明,梭罗沟金矿床属中—低温热液充填型矿床。同时指出,近EW向断裂构造是该区重要的找矿标志,Au、As、Sb、W组合异常区是有利的找矿地段。

The super-large Suoluogou Gold Deposit occurs in the marine volcanic rock formations of the late Triassic in southern Ganzi - Litang metallogenic belt. The ore-controlling factors are analyzed by the deposit geology, wall rock alteration and other characteristics. It is considered that Suoluogou Gold Deposit is not fully constrained by the lithology of strata, and the mineralization is mainly controlled by near EW trending structure. The deep magmatic activities not only provided thermal dynamics for the hydrothermal activities, but also might be the major source of ore-forming fluids. The ore texture and structure, mineral composition and occurrence of ore characteristics show that Suoluogou Gold Deposit belongs to the medium - low temperature hydrothermal filling metasomatic deposit. At the same time, the near EW trending fault is an important ore prospecting indicator. The concentrated areas of Au, As, Sb, W anomalies are favorable prospecting areas.