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石咀铜矿床是开采多年的老矿山,以往被看作是矽卡岩型铜矿床。1981年有人提出与石英斑岩,正长斑岩有关的次火山热液矿床的成因观点。但是这种观点尚不能解释某些地质特征。本文以层控观点,并着重野外地质观察资料为基础,探讨矿床成因。经研究认为该矿床是与一定层位的岩性密切相关,并受后期含矿热液迭加的多源二次复合矿床。一、层控的主要地质依据区内矿化与一定的层位有关。矿体赋存在石炭系上统石咀组中部,由薄层大理岩、千枚状板岩、云母板岩、绢云片岩组成的互层带中,并严格受这一岩性控制。 (一)地层、岩相特征
The Shizui copper deposit is an old mine that has been mined for many years and was previously considered as a skarn type copper deposit. In 1981, it was suggested that the origin of the volcanic hydrothermal deposits related to quartz porphyry and orthoclase porphyry. However, this view still can not explain some of the geological features. Based on the viewpoint of layer control and focusing on field geological observation data, this paper discusses the genesis of the deposit. The study shows that the deposit is closely related to the lithology of a certain horizon and is subject to the multi-source secondary complex deposit superimposed by later ore-bearing hydrothermal fluids. First, the main geological control layer According to the district mineralization and a certain horizon. Ore bodies occur in the central part of the Upper Carboniferous Shizu Formation, which is controlled by this lithology. It is comprised of thin layers of marble, phyllite, mica slate and sericite schist. (A) strata, lithofacies characteristics