河南西峡金红石矿床成矿特征

西峡金红石矿床位于秦岭造山带东段南缘，古生代陆缘断陷带内，是一个大型角闪质片岩型金红石矿床．矿体赋存于古生界信阳群龟山组第三段，含矿层为合金红石角闪质片岩与大理岩互层．通过对该矿床的成矿地质条件、成矿母岩特征、钛的分布规律，变质成矿作用及后期热液改造等方面的研究，认为陆缘断陷深海槽及控制其形成的深断裂、富钛基性火山岩、区域变质及热液改造等综合因素叠加部位是寻找该类型金红石矿床的最佳方位。

METALLOGENIC FEATURES OF THE XIXIA RUTILE DEPOSIT,HENAN PROVINCE

AbstractSituated in a Paleozoic marginal fault-bound basin on the southern margin of East Qinling orogenic belt, Xixia rutile deposit represents a large-sized, amphibole schist-type rutile occurrence. The ore bodies usually lie in the third member of the Guishan formation of the paleozoic Xinyang group with the conductive beds composed of rutile-bearing interlayers of amphibole schis with marble. Systematic researches on metullogenic controls, ore- forming source rocks, distributions of titanium, role of metumorphism in mineralization and reworking of posthydrothermal activities show that the most feasible approach for locating Xixiadeposit of its kind should be to determine all the factors including marginal rift trough and the related deep faulting, titanium- rich basic volcanic rocks, regionalmetumorphism and hydrothermal reworking,particularly when they jointly gave play to mineralizaion.