摘要
五凤—五星山金矿床属中生代陆相火山岩低流型浅成热液型金矿床。侏罗系上统金沟岭组火山岩为其主要矿源层，矿体受火山机构的断裂、裂隙和次火山岩脉内外接触带控制。碱长花岗岩侵入金沟岭组底部，为金矿形成提供了热源。成矿作用主要在低压、中性介质和弱氧化、超浅成条件下进行。金矿一般富集于矿体上部；矿体转弯、膨大处及分支复合处；强冰长石绢云母硅化蚀变岩中；含细粒黄铁矿的方解石石英脉；辉银矿集中地段。
Wufeng-Wuxingshan gold deposit, which occurred in Mesozoic continental volcanicrock, is regarded as an epi-hydrothermal deposit. The main source bed is derived from thevo1canic rock of Jingouling formation of upper Jurassic. Ore bodies are controlled by thering and radial fissures of the volcanic mechanism, the inner and outer contact zones ofsubvolcanic veins' Alkali-feldspar granite which intruded into the basal position of Jin-gouling formation provided the main thermal source for gold deposit' Metallogenesis main-ly occurs under low pressure-temperature, neutral medium, weak oxidation and u1tra-s u-pergenesis conditions' Gold and silver are relatively enriched in the fo1lowing parts: @theupper part of the body; ②the turning corner l expanding part and the intersection ofbranches in the ore veins; ③strongly sericitized and adularized altered rock; ④calcitequartz veins containing fine grain; ⑤the concentric part of argentite.
出处
《火山地质与矿产》
1998年第2期113-118,共6页
Volcanology & Mineral Resources
关键词
低硫型
浅成热液型
金矿床
地质特征
成矿条件
gold deposit subvolcanics volcanic structure Wufeng-Wuxingshan Jilin province
