大瑶山加里东造山带中部与斑岩相关金矿床的特殊性及构造环境对其制约作用-以大王顶金矿床为例  

Specific Features of the Porphyry-related Gold Deposits in the Middle of the Dayaoshan Caledonian Orogenic Belt and Constraints of Tectonic Setting:An Example from the Dawangding Gold Deposit

作　　者：许智迅 刘亮明[2] 孙涛[2] 

机构地区：[1]中国冶金地质勘查总局中南局,湖北武汉430081 [2]中南大学计算地球科学研究中心,湖南长沙410083

出　　处：《地质与勘探》2012年第2期305-312,共8页Geology and Exploration

基　　金：国家自然科学基金项目(编号:40772195)资助

摘　　要：广西大瑶山加里东造山带发育的金矿床既具有造山带型矿床的特征,同时又与花岗斑岩密切相关。位于大瑶山金矿带中部的湾岛矿田的大王顶金矿就是这类金矿床的典型代表之一。本文通过调查大王顶金矿床的特征以及成矿花岗斑岩体中金的富集分布规律,剖析了加里东褶皱造山变形以及花岗斑岩对金成矿的控制作用。由于大瑶山加里东造山带所处的特殊的构造环境,造山晚期所形成的I型花岗斑岩体在金的成矿中起着重要的作用,但金矿脉的容矿空间的形成却主要还是构造作用的结果。The gold deposits discovered in the Dayaoshan Caledinian orogenic belt in Guangxi Province share the characteristics of orogenic gold de- posits and were intimately associated with granitic porphyries. And the Dawangding gold deposit in the Wangdao orefield in middle of the Dayaoshan gold mineralization belt is a typical one of such deposits. In this work, we investigated the characteristics of ore-bearing fractures and enrichment and distribu- tion of Au in the granite porphyry in the Dawangding deposit to illuminate the tectonic controls of the Caledinian orogenic deformation and the granite par- phyry on the gold mineralization. The result shows that the granite porphyry is critical for gold mineralization, while the ore-bearing spaces are mainly caused by structural fracturing. It can be ascribed to the special tectonic setting of the Dayaoshan Caledinian orogenic belt.

关 键 词：金矿床 含矿构造 造山带斑岩 大瑶山 广西 

分 类 号：P618[天文地球—矿床学]