摘要
对金矿床地质地球化学和成矿流体及构造动力学研究认为，石英脉型金矿广泛发育围岩交代作用，在时间上遵循碱金属交代→Ｃａ、Ｆｅ、Ｍｇ中性交代→酸性交代的总体演化序列。与围岩的交代作用，沸腾作用引起的相分离和大气降水的加入所产生的混合稀释是成矿流体体系演化的主要途径，容矿断裂构造活动可划分为脆性破裂和韧脆性扩张两种动力学状态。成矿物质在非平衡和近平衡两种状态交替中分异结晶。流体演化与成矿动力耦合是形成金矿的主要机制。
Based on the research of geochemistry, ore forming fluid and tectonic dynamics of gold deposits, it is known that wall rock metasomatism is widely developed in quartz vein type gold mineralization, and the general evolution sequence was alkali metasomatism Ca, Fe, Mg neutral ones-acidic ones temporally. Wall rock metasomatism, boilings and separation of fluid facies, as well as mixture with meteoric water were the main evolution processes in a fluid system. The activities of ore bearing fractures can be divided into two states: brittle and brittle ductile ones. Ore forming materials were deposited under these two conditions of nonequilibrium and near equilibrium. The coupling of fluid evolution and tectonic dynamics is a main mechanism of quartz vein type gold deposits.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1999年第2期130-136,共7页
Geotectonica et Metallogenia
基金
中国科学院矿床地球化学开放研究实验室资助课题
关键词
石英脉型
金矿床
流体成矿体系
成矿构造
动力学
Quartz vein type gold deposit, fluid metallogenic system, ore forming tectonodynamics, Mouping Rushan, Shandong, China
