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我们详细地研究了南京栖霞山铅锌硫矿床。特别有意义的是在结核状、层纹状矿石内发现了各种各样的草莓状黄铁矿。经研究藻类的专家鉴定,其中有些具藻类化石的细胞组织,有些具管孔藻类化石的细胞组织。它们主要是由黄铁矿和胶黄铁矿组成。其细胞的间隙常为有机质所充填。但其内部结构特征是:(1)由粒径约20μ的细胞排列成管状放射体;(2)主要由粒径自40—60μ的细胞有序地排列。其生成可能是当生物原生质腐烂时,遂发生硫还原细菌产生HS~-。这种HS`-与Fe~(2+)相结合生成草莓状黄铁矿。因此,它们是生物化学作用的产物,是同生沉积——早期成岩阶段的结果。与之伴生的还有变胶状构造。这类矿石将成为本区主要的工业矿体。其生成时代属早——中石炭世。矿体呈层状、似层状是或大透镜体。其产状与围岩基本上是一致的,但局部有斜交(热液迭加的结果)。但本区也有明显属后生的脉状、网脉状、浸染状及晶簇状矿石。它们往往具有显著的充填交代特征。此中普遍地表现为闪锌矿交代黄铁矿,方铅矿交代闪锌矿。其产出常与断裂构造及硅化、重晶石化具有密切的关系。显然,这是多期多阶段热液迭加的成矿现象。本区的铅锌矿,主要与这种成矿作用有关。因此,本区的矿石是由同生沉积——热液迭加形成的。
We have studied in detail the Qixiashan lead-zinc-sulfur deposit in Nanjing. Of particular interest is the discovery of a wide range of strawberry-like pyrite in nodular, layered ores. After the study of algae experts identified, some of which have algae fossil cell tissue, and some of the tube pore algae fossil cell tissue. They are mainly composed of pyrite and pyrite. The cell gap often filled with organic matter. However, its internal structure is characterized by: (1) arranging cells with a size of about 20μ into tubular radiators; and (2) arranging cells mainly in the order of 40-60μ in particle size. Its generation may be when the biological protoplasm decay, then the sulfur-reducing bacteria produce HS ~ -. This HS `- and Fe ~ (2+) combined to produce strawberry-like pyrite. Therefore, they are the product of biochemistry and are the result of syngenetic sedimentation-early diagenesis. Associated with the gelatinous structure. Such ore will become the main industrial orebody in this area. The generation era is early - Carboniferous. Ore body is layered, like layered or large lens body. Its production and rock are basically the same, but there is a bias (hydrothermal superposition of the results). However, there are obvious veins, veins, disseminated and crystal-like ores in this area. They tend to have significant filling proverbial features. This is generally manifested as sphalerite pyrite interchange, galena for sphalerite. Its output often with the fault structure and silicification, barite is closely related. Obviously, this is a multi-stage multi-stage hydrothermal superposition of metallogenic phenomenon. Lead-zinc deposits in this area are mainly related to this mineralization. Therefore, the ore in the area is formed by the syngenetic deposition-hydrothermal superposition.