大阜山金红石矿床含矿岩体的形成变化及其与成矿的关系

通过对含矿岩体结构、产状、岩石类型、化学成分、微观特征,矿体产状、矿体与各类岩石的空间关系,矿石岩性观察研究,认为含矿岩体空间形态为向北东倾的椭圆柱形,原岩为辉长岩、成岩过程中物质成分发生了充分的分异富集,分异作用主要是重力分异、次为结晶分异;成岩后又经历了“角闪岩相→榴闪岩相→绿片岩相”的变质过程,三次变质作用均有金红石形成、第二次是主要成矿作用。分异作用奠定了成矿的物质基础、是矿体产状和矿石岩性的主因,变质作用使高钛岩石变为矿体。深部有一定找矿前景。

FORMING AND CHANGES OF THE ORE ROCK IN RUTILE MINERAL AND THE RELATION TO THE MINERALIZATION, DAFUSHAN

According to the rock body structure, attitude, rock type, chemical component, micro characteristic, and the ore body attitude, the spatial relationship of the ore body and all kinds of rocks, lithology, etc, it can be concluded that ore body is oval column lean to east-north, and the original rock is the gabbro. Differentiation and enrichment occurred in diagenetic course, including the main gravity differentiation and the secondary crystallization differentiation. Metamorphic course--“amphibolitic facies-eclogite facies-greenschist facies” took place after the diagenetic course. Rutile comes into being in every metamorphic course and the main mineralization is the second one. Differentiation function is the material base for mineralization, which is the main reason for the forming of the ore body attitude and the rock lithology. Metamorphism makes the rock with high titanium turn into the ore. There is certain perspective for prospecting in the deep.