锡矿山锑矿有限应变及其与成矿关系的初步分析

锡矿山锑矿田,从岩石有限应变及矿化特征反映出来的构造阶段性,是完全一致的。矿田构造,主要是简单剪切递进变形的结果,构造变形与成矿作用同步。剪切应力,是成矿的主要动力来源,各剪切变形阶段,均有矿液的迁移、叠加和富集。剪应变强度与成矿呈正相关关系。据此,本文提出了在F_(75)与Fx断裂之间,剪切带南、北两端延伸方向及其深部进一步找矿的建议。

FINITE STRAIN OF XIKUANGSHAN ANTIMONY DEPOSIT AND PRELIMINARY ANALYSIS ON ITS RELATION TO MINERALIZATION

The tectonic phases of XiKuangshan antimony orefield reflected by the finite strain of the rocks show no difference from those represented by the mineralization features. The orefield structure resulted mainly from simple shear progressive deformation, and tectonic deformation was in synchronism with mineraliz- ation. The shear stress is the main power source for mineralization,and activation,overlapping and enrichment of ore-forming fluid occur in each shear deformation phase.The intensity of shear strain shows positive correlation with mineralization.Thereupon,it is suggested to conduct further prospecting in the southward and northward extension of the shear zone and its deeper part between F_(75) and F_x faults.