河南省土门萤石矿地质特征及控矿因素

河南省土门萤石矿赋存于上元古界栾川群煤窑沟组地层中,地层岩性、构造及岩浆岩对萤石成矿有较强的控制作用。白云质大理岩因其化学成分富镁钙、缺硅,有利于萤石成矿。叠加发育于岩性接触面之上的断裂构造是成矿的有利条件,既是含矿热液运移的通道,同时为成矿物质富集成矿提供了有利空间。矿区内正长(斑)岩脉可能是成矿母岩。研究认为土门萤石矿床为(低温)热液充填脉状矿床。矿区内存在多次成矿,总体而言,萤石成矿在先,之后又有多次的成矿热液活动叠加,并形成了Mo、Pb、Zn等金属矿化。研究成果可为今后找矿勘查工作提供参考。

Geological characteristics and ore-controlling factors of fluorite deposit in Tumen, Henan Province

Tumen fluorite deposits occur in the Meiyaogou formation of Luanchuan group in the upper Proterozoic. Stratum, structure and magmatic rocks have a strong control effect on fluorite deposits. The chemical composition of dolomitic marble is rich in magnesium and calcium, but lacking in silicon, which is conducive to fluorite mineralization. The fault structure superimposed on the contact zone of different lithology is a favorable condition for mineralization. It is not only a channel for the migration of mining hydrothermal fluid, but also provides a favorable space for ore-forming. The syenite (porphyry) veins in the mining area may be the ore-forming parent rock.The study believes that the fluorite deposit is a (low temperature) hydrothermal filling vein deposit.There are multi-stage mineralizations in the mining area. In general, fluorite mineralization occurs first, and then there are multiple metallogenic hydrothermal activities superimposed, and the formation of Mo, Pb, Zn mineralization.