粤东鸿沟山金矿区地质特征、矿床成因及电气石对金富集成矿的贡献  

Geological characteristics and deposit genesis of Honggoushan gold orefield and mineralization significance of tourmaline to gold enrichment,eastern Guangdong

作　　者：高凤颖 GAO Fengying(The Second Geological Brigade of Guangdong Provincial Geological Bureau,Shantou 515021,Guangdong,China)

机构地区：[1]广东省地质局第二地质大队,广东汕头515021

出　　处：《矿产与地质》2018年第2期257-262,共6页Mineral Resources and Geology

基　　金：广东省地质勘查基金项目(编号:[2015]02;[2016]01;[2017]06)资助

摘　　要：鸿沟山金矿位于NE向汕头—惠来深断裂带与NW向饶平—大埔大断裂交汇部位,晚侏罗世大北山火山盆地南缘。赋矿地层为头木冲组和银瓶山组碎屑岩,主要受NW向断裂带、破碎带控制,矿体成群分布,呈脉状、似脉状产出。通过对该金矿区地质特征、围岩蚀变、矿体特征、矿床成因等综合研究,初步认为鸿沟山金矿床属热液充填交代为主的脉状矿床。同时对区内金矿富集的地球化学机理进行了推导,探讨了电气石在金富集成矿过程中的贡献。提出了在化探Au异常和电气石化蚀变晕重叠地段找矿的新思路。Honggoushan gold deposit is located at the intersection of Shantou-Huilai deep fault zone in NE and Raoping-Dapu fault in NW on the southern edge of the late Jurassic Dabeishan volcanic basin.The orebodies occur in the clastic rocks of Toumuchong Formation and Yinpingshan Formation,are mainly controlled by the NW fault zone and fracture zone,and distributed as clusters in vein and semi-vein.Based on the comprehensive study of the geological features of gold deposit,the surrounding rock alteration,orebody characteristics and deposit genesis,it is preliminarily believed that Honggoushan gold deposit is belonged to the vein-type deposit which is dominated by hydrothermal filling and metasomatism.Then,it is also inferred for the geochemical mechanism of gold enrichment in the area,and the contribution of tourmaline in the process of gold enrichment and mineralization is also discussed as well.A new idea for prospecting in the overlap areas of geochemical Au anomaly and the alteration zone of tourmaline was proposed.

关 键 词：鸿沟山金矿 地质特征 矿床成因 电气石 富集成矿 粤东 

分 类 号：P618.51[天文地球—矿床学] P578.953[天文地球—地质学]