山东栖霞吕家金矿地质特征及矿床成因分析

Geological Characteristics and Origin Analysis of Lvjia Gold Deposit in Qixia in Shandong Province

摘要:

吕家金矿位于蓬（莱）栖（霞）金成矿带中段，矿体受NNE向断裂控制，呈脉状、透镜状，矿石为黄铁矿石英脉及黄铁绢英岩。该矿床的形成主要受前寒武纪变质基底岩系、中生代岩浆岩以及复杂的构造体系等多种成矿因素叠加控制。寒武纪变质基底岩系、中生代岩浆岩在成矿作用过程中作为初始矿源层，为矿床成矿提供部分成矿物质来源，断裂构造则为含矿热液的迁移和富集沉淀提供良好通道和赋矿空间，岩浆活动是矿质运移的主要动力来源。通过对该矿床地质特征及矿床成因的总结研究，认为该矿床属岩浆中低温热液充填交代蚀变岩型金矿床。

Abstract:

Lvjia gold deposit is located in the middle part of PenglaiQixia gold metallogenic belt. The ore body is controlled by faults with the trend of NNE, and occur as vein and lenticular type. The ore is pyrite quartz vein and ferrosilicite. The formation of the deposit is mainly controlled by the superposition of Precambrian metamorphic basement rock series, Mesozoic magmatic rocks and complex structural system. The Cambrian metamorphic basement rock series and Mesozoic magmatic rocks act as the initial source bed in the process of mineralization, which provides some oreforming material sources for the mineralization of the deposit. The fault structure provides a good channel and orebearing space for the migration and enrichment of orebearing hydrothermal fluids. Magmatic activity is the main source of mineral migration. Based on the summary and study of geological characteristics and the origin of the deposit, it is considered that the deposit is a magmatic lowmedium temperature hydrothermal filling metasomatic altered rock type gold deposit.