摘要
论述了金矿化过程中的两个地球化学问题，即沉积喷流作用与金矿化的关系、金与铅锌矿化的关系．海底沉积喷流作用不仅能形成重要的贱金属硫化物矿床，而且也导致金的明显富集；大量的地球化学研究工作已识别出一些沉积喷流型金矿床，揭示出部分太古宙绿岩带中的脉状金矿床与沉积喷流作用密切的时空关系．在块状硫化物矿床和现代洋底硫化物堆积物中金和贱金属的富集程度是相同的，而在脉状金矿床中富集了大约１０３～１０４倍金的同时，仅轻度富集或实际上贫化了贱金属．在特定的地质构造背景中，金和铅锌相伴产出，两类矿床可以互为找矿标志；
Two geochemical problems in the process of gold mineralization are presented in this paper: the relation of the sedimentary_exhalation to the gold mineralization, and the separation of gold from lead_zinc mineralization. The submarine sedimentary_exhalation aids not only the accumulation of important base metal sulfide deposits, but also the distinctive concentration of gold. A great number of geochemical researches have been completed for the identification of some sedimentary_exhalation gold deposits. These researches have concluded that a close temporal and spatial relation occurs between the lode gold deposits in parts of Archaean greenstone belt and the corresponding sedimentary_exhalation. The concentration of gold and base metals in the massive sulfide deposit is the same as that in the modern oceanic_floor sulfide accumulation. The Au, As, Sb, B, W, Se, Te and Bi in the range of about 10 3-10 4 are concentrated in the lode gold deposit, but the base metals are slightly concentrated or actually diluted. In the specific geological and structural environment, the gold and lead_zinc are associated with each other. This paragenic relation can serve as the prospecting criteria. The difference between the chemical composition and the circulation way of the metallogenic fluid is a major reason for the lead_zinc paragenesis and separation.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1999年第3期292-297,共6页
Earth Science-Journal of China University of Geosciences
基金
国家科技攻关项目
有色人才基金
关键词
金矿床
铅锌矿床
沉积喷流
矿化过程
地球化学
gold deposit, lead_zinc deposit, sedimentary_exhalation, mineralization process.
