PRELIMINARY STUDY ON THE GEOLOGY AND METALLOGENESIS OF THE TONGXIN ANTIMONY DEPOSIT IN HUNAN PROVINCE
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摘要: 同心锑矿床产于新元古界板溪群五强溪组，变质砂岩和板岩为矿体赋存的直接围岩.五强溪组地层中锑丰度高，比克拉克值高出90~500倍，比区域背景值高出3~25倍，为矿源层.由主干断裂派生而成的次级构造——断裂、裂隙、层间破碎带和层间剥离，都是矿体赋存的场所，通过华夏系断裂构造改造、迁移而富集成矿.矿床受一定的地层控制，改造富集作用明显，成矿物质来自地壳上部矿源层.初步认为同心锑矿为沉积-改造层控型矿床.Abstract: The Tongxin antimony deposit in Anhua County, Hunan Province occurs in the metamorphic sandstone and slate of Wuqiangxi Formation of Neoproterozoic Banxi Group. The Wuqiangxi Formation serves as the source bed, with high Sb abundance, which is 90 to 500 times more than the Clarke value and 3 to 25 times more than the regional background. The secondary structures of the major fault are the hosts of orebodies. The ore is controlled by strata, and reformed by the Cathaysian structural system, then formed with migration and concentration. The ore-forming material is derived from upper crust. The deposit belongs genetically to sedimentary reconstructed stratabound types.
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