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希布加莫矿区是一个重要的黄金产地。迄今为止,已产黄金1050吨,平均品位为1.85克/吨。人们通常将该矿床划为具不同组分的脉状类型,与此不同,本文将论述该区区域岩浆和构造演化对金成矿作用的重要影响。同火山期的矿化作用包括火山成因的块状及浸染状硫化物矿化作用和其后的浅成低温热液矿化作用;后者还与逐渐形成的火山地貌及同火山的侵入岩体有关。典型的太古代脉金矿床及稍晚的不明成因的Cu-Au矿床的矿化富集都与同形变期(基诺拉期)是一致的。在金矿化阶段,东西延伸的剪切带和北东延伸的断层体系间存在的空间关系表明它们可能是导致扩容作用加剧的一种机理。晚基诺拉期及后基诺拉期的剪切体系控制着层状侵入体中最后阶段的金矿化富集。
The Shibamoga mining area is an important gold producer. So far, 1050 tons of gold have been produced with an average grade of 1.85 g / t. Different from this, the deposit is usually divided into vein types with different compositions. In this paper, we will discuss the important influence of magmatic and tectonic evolution on gold mineralization in this area. The mineralization in the same volcanic period includes massive and disseminated sulfide mineralization of volcanic origin and subsequent epithermal mineralization; the latter is also related to the gradually formed volcanic landforms and volcanic intrusions related. The mineralization of the typical Archean vein gold deposit and later unknown Cu-Au deposit is consistent with the metamorphism (Kenora phase). At the gold mineralization stage, the spatial relationship existing between the east-west shear zone and the northeastern extension of the fault system suggests that they may be a mechanism that leads to an intensification of the expansion. The Late Kenl and Later Kenora stage shear systems control the gold mineralization enrichment of the last stage of stratiform intrusion.