前寒武纪绿岩地体中金丰度与金成矿的关系  

RELATIONSHIP BETWEEN THE ABUNDANCE AND METALLOGENESIS OF GOLD IN PRECAMBRIAN TERRAINS

作　　者：王晓勇[1] 

机构地区：[1]武警黄金第六支队,黑龙江哈尔滨150049

出　　处：《地质与资源》2001年第4期244-247,共4页Geology and Resources

摘　　要：许多研究者认为 ,金丰度高的花岗岩和地层就是金矿床的矿源岩和矿源层 .随着中子活化法和化学 -光谱法的广泛应用 ,分析精度有了大幅度提高 (可达 0 0 1× 10 -9) .大量的国内外资料表明 :绿岩地体中变质岩的金丰度较低 ,平均为 0 71× 10 -9～ 2 40× 10 -9,与金矿有关的花岗岩金丰度更低 ,平均只有 0 6 2× 10 -9～ 1 2 0× 10 -9.因此 ,矿源岩和矿源层并不是人们所想像的那些特定的岩石或地层 .所有岩石都可能成为矿源岩或矿源层 .花岗岩和地层中金的丰度与金矿床之间不存在必然的联系 ,金成矿与使金活化。The granite and strata with high Au abundance have been considered to the source of gold by many geologists.With broad application of the method of neutron activation and chemical-spectral analysis,the accuracy of analysis has greatly improved(up to 0.01×10 -9).A wealth of data shows that the Au abundance of metamorphic rocks in greenstone terrains is rather low(0.17×10 -9 to 2.40×10 -9 in average),and in the relevant granites is only 0.62×10 -9 to 1.20×10 -9 averagely.This concludes that the concept of source rocks or source beds is ambiguous and non-specific.All rocks are possible to perform as source rocks/beds.The mineralization of gold is not related to the Au abundance in granite and strata,but to the metallogenetic mechanism involving gold activation,migration and enrichment.

关 键 词：绿岩地体 金丰度 矿源层 成矿机理 前寒武纪 

分 类 号：P595[天文地球—地球化学] P618.51[天文地球—地质学]