摘要
龟山岩组是老湾金矿床原始矿源层 ,其形成过程中成矿元素已得到初步富集。燕山期花岗岩提供了部分热源、水源及成矿物质。成矿流体具低盐度、弱碱性及较高矿化度的混合水特点。Au主要是以金硫、金硅络合物形式迁移 ,其次是被硅胶吸附呈胶体状态迁移。在迁移过程中由于天水的加入 ,改变了介质的物理化学条件 ,因而导致Au在有利的空间聚积成矿。
The Guishan Formation (Pt 2-3 gs) is the primary source bed of Laowan gold deposit. The ore-forming elements is initially concentrated in the process of formation of Pt 2-3 gs. The Yanshanian granite provides partial thermal source, water and ore-forming materials.The ore-forming flow is the mixed water with lower salinity, lower alkalinity and higher mineralization. The gold is transferred mainly in the form of gold-sulfer and gold-silicon complexes, minorly in the form of collioid adsorbed by silicon collioids. It is because of atmospheric water during transportation that results in alteration of geochemistry conditions of medium and accumulation of gold in favorable space.
出处
《湖北地矿》
2004年第2期23-29,共7页
Hubei Geology & Mineral Resources
基金
国家重点黄金地质科技攻关项目 ( 90 0 5 1-0 9-17)
