内蒙额尔古纳成矿带中生代火山岩浆活动与金属成矿的关系

Relationship between Mesozoic Volcano-magmatic Activity and Metallization in the Erguna Metallogenic Belt, Inner Mongolia

在岩石学和微量元素地球化学研究的基础上，通过对不同类型矿床的成矿岩体及围岩条件的分析，探讨了中生代火山岩浆活动与金属成矿的关系。认为晚侏罗世火山岩浆活动为成矿提供了有利的围岩和构造空间；早白垩世岩浆活动提供了成矿岩体及热力学条件，该期次火山岩浆的侵入并作用于不同的围岩，形成了由斑岩型Ｃｕ、Ｍｏ矿，浅成热液型Ａｇ、Ｐｂ、Ｚｎ矿等组成的一系列矿床组合。

Based on petrological and trace element geochemical studies as well as an analysis of ore-forming rock bodies and wall rocks for different types of ore deposits, the present paper has probed into the relationship between Mesozoic volcano-magmatic activity and metallization. It is held that Late Jurassic volcano-magmatic activity provided favorable wall rock and structural space for the ore-forming process, and that Early Cretaceous magmatic activity supplied ore-forming rock bodies as well as thermodynamic conditions. The subvolcano-magmatic intrusion of the latter period played the major role and reacted with different wall rocks, forming a series of ore deposit associations composed of porphyry copper and molybdenum deposits and epithermal silver, lead and zinc deposits.