内蒙古地区锑矿床特征及成矿规律

通过对内蒙古地区锑矿床地质特征的总结及典型锑矿床地质特征的详细研究，对比中国典型锑矿床控矿因素，从成矿大地构造背景、含矿岩系、控矿构造等方面对该地区锑矿的成矿规律进行初步探讨，认为内蒙古地区锑矿的成因类型可以划分为碎屑岩地层中热液型、火山热液型两种类型；各矿床中含矿岩系多为晚古生代泥盆系至二叠系之间，具有近东西向线性分布的特征；矿（化）体主要受控于近东西向断裂构造带，成矿作用可能与板块碰撞过程中的俯冲增生造山作用有关；滨海相、浅海相、半深海相或海陆交互相沉积环境下的还原条件中形成的暗色细碎屑岩系是赋矿的有利层位；锑矿热液的形成可能与深部偏幔源-幔源的构造岩浆活动有关.

CHARACTERISTICS AND METALLOGENIC REGULARITY OF ANTIMONY DEPOSITS IN INNER MONGOLIA

Based on the study of geological characteristics of antimony deposits in Inner Mongolia and typical antimony deposits, with comparison of the ore-controlling factors between typical antimony deposits in China, the paper discusses the metallogenic regularity of antimony deposits in Inner Mongolia from the aspects of metallogenic tectonic background, ore-bearing rock series and ore-controlling structure. It is considered that the antimony deposits in Inner Mongolia can be classified into hydrothermal type in clastic strata and volcanic hydrothermal type. The ore-bearing rock series in these deposits were mostly formed in Late Paleozoic Devonian-Permian, with the characteristics of nearly E-W linear distribution. The ore/mineralized bodies are mainly controlled by the nearly E-W-trending fault belt, and the mineralization may be related to the subduction-accretion orogeny during plate collision. The dark fine clastic rock series formed in the reduction conditions of littoral facies, neritic facies, bathyal facies or interactive marine-terrestrial sedimentary environment are the favorable horizon for ore-hosting rocks. The formation of antimony hydrothermal solution may be related to the deep mantle-mantle source tectonic magmatic activity.