长江中下游九瑞地区构造演化及控岩控矿特征

九瑞地区在构造演化及成矿物质来源方面具有良好的地质条件。文章从构造演化、与成矿关系密切的岩浆侵入事件以及岩浆侵位机制等角度,对九瑞地区控矿要素及成矿规律进行了论述和分析。九瑞地区构造演化可分为3个大的阶段,与成矿关系最为密切的岩浆活动为燕山期岩浆侵入,并以早期第三阶段最发育,该阶段又细分为两个侵入期次;在不同构造位置存在两种岩体侵位机制,不同侵位机制形成不同矿床类型。文中探讨了成矿条件及控矿要素对成矿作用的制约,期望为九瑞地区开展进一步找矿勘查工作提供参考。

Tectonic evolution of Jiujiang-Ruichang region and its ore - controlling and rock-controlling charateristics in the middle and lower Yangtze river

There is favorable metallogenic geological conditions in terms of tectonic evolution and metallogenic material sources in the Jiujiang-Ruichang region. The paper discussed and analyzed ore-controlling factors and metallogenic regularities in fields of tectonic evolution, magmatic intrusive anctivities related to mineralization and magmatic emplacement mechanism. Based on integrated analysis, the tectonic evolution of Jiujiang-Ruichang area can be divided into three major stages:Magmatic activity closely related to mineralization was formed in Yanshan period, and the dominant magmatic intrusive was formed in the third stage of Early Yanshan period which is further divided into two intrusive periods. There are two types of granite emplacement mechanism in different tectonic positions, different emplacement mechanisms control the different types of ore deposits. The paper discusses the restriction of metallogenic conditions and ore-controlling factors, the study results will help the further mineral exploration in the Jiujiang-Ruichang area.