摘要
大青山地区金矿床主要类型为绿岩型热液金矿床,乌拉山群为重要的矿源层。固阳—武川断裂控制了金矿田的总体分布。构造岩发育、热液蚀变强烈的地段是有利的成矿地段。成矿流体具低盐度、CO2/H2O较高的特点。氢、氧、碳同位素组成特征表明,成矿热液与区域性成矿期岩浆活动有关,并受大气降水影响,矿石硫具幔源和下地壳源性质。梁前经后石花至松树背一线的山后断裂附近。
Gold depositis in Daqinshan area are mainly greenstone-belt type. Wulashan group is the most important ore source stratum. The Guyang-Wuchuan fault has controlled the distribution of gold field. The places where tectonic rocks and hydrothermal alteration have been developed are significant for ore-formation, re-forming fluids were low in salt and rich in CO 2 . The temperatures of ore-forming fluids were mid-high, and pressures of that of gold deposits in dutile shear zones were high. H, O, C isotope compositions show that fluids ware related to magma during ore-formtion and affected by meteoric water. Ore sulfur was mantle and lower crust sources. The prospecting district is near the fault area from Liangqian to Songshubei.
出处
《地质与勘探》
CAS
CSCD
北大核心
1998年第6期14-20,共7页
Geology and Exploration
基金
中国有色金属总公司地质勘查总局和冶金工业部人教司资助