华南层控金矿床形成的地质背景及矿石建造特征

作者根据对华南地区近千个层控金矿床(点)的分析和研究,把层控金矿分为五大类,即产于碎屑岩系、碳酸盐岩系、板岩和千枚岩系、片岩和片麻岩系以及火山岩系中的五类金矿床。华南层控金矿床的矿石建造复杂多样,计有:1.金-砷-石英;2.金-铅-锌-石英;3.金-锑-(钨)-石英;4.金-针-石英;5.金-镍-石英,6.金-蔷薇辉石;7.金-氟镁石,8.金-方解石;9.金-重晶石;10.金-菱铁矿等十类建造。根据矿床分布、控矿地层、岩性和构造,把华南地区层控金矿划分出八个成矿区(成金区)。

GEOLOGICAL BACKGROUND AND ORE FORMATION OF THE STRATABOUND GOLD DEPOSITS IN SOUTH CHINA

Stratabound gold deposits in South China are closely related to stratigraphic sequences of high goldabundance. Gold-bearing strata are classified into five types: (1) carbonate sequences, (2) clastic sequences.(3) slate and phyllite strata, (4) schist strata, (5) gneiss strata. According to the distribution of the South China stratabound gold deposits, ore--controlling stratigra-phy and structure system, 8 metallogenic belts have been recognized: (1) Qinling-Daba belt. (2) SouthYangtze belt. (3) East China belt, (4) Nanling belt, (5) Youjiang belt, (6) Sichuan-Yunnan belt, (7) the"Three river" belt, (8) Taiwan belt. Among the ore-formation types of the South China stratabound gold deposits the following are listed:(1) gold-arseni?-quartz formation, (2) gold-lead-zinc-quartz formation, (3) gold-antimony-(wolfram)-quartzformation, (4) gold-copper-quartz-(calcite) formation, (5) gold-nickel-quartz formation. (6) gold-quartz-rhodonite formation, (7) gold-sellaite formation, (8) gold-calcite formation. (9) gold-barite fration. (10)gold-siderite formation. It has been proved that gold content and its constituent feature in sedimentary strata are essential tothe formation of stratabound gold deposits. Their ore-controlling factors exhibit not only in time of met-allogeny, but also in material component of the ore formation.