海南省陵水县岭门钼矿地质特征及成因分析

Geological characteristics and genetic analysis of the Lingmen molybdenum deposit in Lingshui county,Hainan province

海南省陵水县岭门钼矿是近年来新发现的一处矿点,位于九所-陵水断裂带东侧,成矿地质条件优越。本文结合区内地质找矿工作成果,在系统分析区域成矿地质背景、矿区地质特征、矿床地质特征的基础上,对矿床成因、找矿前景进行了研究。研究表明:岭门钼矿成矿作用与早三叠世中粗粒角闪黑云正长花岗岩关系密切。早三叠世岩浆活动为矿床的形成提供了成矿元素活化、迁移和富集的热源条件和驱动力;断裂构造及其次级裂隙系统控制了矿体的产状、形态和矿化强度,提供了成矿流体的聚集空间和沉淀场所,矿点具有高温热液脉型钼矿的成矿特征。

The Lingmen molybdenum deposit is a newly discovered ore spot in the Lingshui county,Hainan province,which is located in the east section of the Jiusuo-Lingshui fault zone,and characterized by superior metallogenic condition.Based on the related geological working results of the mining area,the regional metallogenic geological background,geological characteristics of mining area and deposit are discussed,besides that,the causes of ore deposit formation and the grade of prospecting potenial are analyzed.The study results show that:the mineralization of the Lingmen molybdenum deposit is closely related to the early triassic medium-coarse-grained hornblende biotite syenite granite.The early triassic magmatism provides the heat source conditions and driving forces for the activation,migration and enrichment of ore-formong elements;the fault structure and its secondary fracture system control the occurrence,shape and mineralization intensity of the ore body,and provides the accumulation space and sedimentation site of the ore-forming fluid,which is consistent with the metallogenic characteristics of the high temperature hydrothermal vein type molybdenum ore.