镇安太白庙类卡林型金矿地质特征及成因探讨

Metallogenetic Characteristics and Genesis of Para-Carlin-Type Gold Deposits in Tai Baimiao Region, Zhen’an

太白庙金矿床位于南秦岭印支褶皱带,主要产于上泥盆统星红铺组变泥钙质石英粉砂岩中。受NWW向次级断层带控制,矿体呈脉状、似层状、透镜状。成矿热液沿主断裂运动向次级断裂扩散,形成含金方解石石英脉,控制着矿体的分布,金以浸染状存在于石英脉中。矿化与绢云母化、硅化、黄铁矿化、绿泥石化等有密切关系。太白庙金矿集中体现了经典卡林型金矿床特征,又稍有不同,因此该金矿定名为类卡林型金矿床。

The gold deposit of Tai Baimiao lies on the Indo-China folding zone of the Southern Qinling and has been buried in a metamorphic quartz siltstone bearing mud and calcium at the Hong Xingpu group. The rock-body is a vein, an analogous layer or a lens in shape and has been controlled by secondary faulting zone along the orientation NWW. The mineralization hydrothermal spreads to the secondary break proliferation along the master fracture, forms the golden calcite quartz veins, controls distribution of the ore body, the gold has been buried in the quartz veins in disseminated form. The mineralization is closely related with the pyritization, silicatization, sericitization and chloridization. The Tai Baimiao gold deposits reflect the characteristics of the classical Carlin-type gold deposits, but slightly different, therefore this gold deposits is defined as the Para-Carlin type gold deposit.