湖南包金山金矿围岩蚀变特征及其与金矿化的关系

The Relationship between Gold Mineralization and Alteration Characteristics of Country Rock in Bao Jinshan Gold Deposit,Hunan Province

包金山金矿为一中低温热液充填交代型金矿床,热液金矿床总是伴随着围岩蚀变,研究围岩蚀变对该区金矿床勘查具有重要意义,文章总结了该区热液活动前、中、晚各个时期所形成的围岩蚀变组合及分带性,并探讨了其与金矿化的关系,认为热液活动前中期内中带形成的硅化、绢云母化、碳酸盐化、黄铁矿化蚀变组合与金矿化关系最为密切,且这几种蚀变叠加并强烈时,往往形成较富的金矿体.

Bao Jinshan Gold Mine is a low-medium hydrothermal filling-metasomatic deposit. The hydrothermal deposit is always associated with the alteration of country rocks, so that the researching on the alteration of host rocks is crucial to the exploration of local gold deposits. This dissertation has summarized country rock alteration complexes and bands division during the early, medium and late period of local hydrothermal activities, as well as the relationship between such these complexes and gold mineralization. It has concluded that the medium-early altered complexes of silicon, sericite, carbonate and pyrite is highly associated with gold mineralization; if these complexes are strongly superimposed, concentrated gold deposits would always be produced.