湖南境内沿倾向发育较深的脉状矿床的地质特征及规律

湖南省境内有些脉状矿床，沿倾向延伸的长度为水平长度的数倍，而且还有侧伏规律。若脉状矿床发育于缓倾角的断层带上时，矿脉往往受断层上盘板岩、断层带上的泥质的或硅质的断层胶结物所控制，矿脉则发育于其下面；若矿脉发育于高角度的断裂裂隙中时，则矿脉往往是相互平行的多条，且呈雁行排列。这些特点和规律，对地质勘查具有指导意义。

Characteristics of Vein Deposit Occurring Deeply along Dipping Direction in Hunan

Some deposits in Hunan occur along dipping direction and their lengths in this direction are several times larger than those in horizontal direction.These deposits have also a phenomenon of lateral plung-ing. If a vein deposit occurs at a fault belt with gentle dipping angle it trends to be controlled by slate,argila-ceous or siliceous cements at the roof Of the fault. In other words the deposit forms beneath them,If a vein de-posit occurs in the fracture of a fault with steep dipping angle ore bodies usually arrange in parallel and en eche-lon.All these characteristics have the guiding significance for geologic prospecting.