广西罗城县记洞湾锡多金属矿床地质-地球物理空间模型及成矿规律

Geological-geophysical spatial model and metallogenic regularity of Jidongwan tin-polymetallic deposit in Luocheng County of Guangxi

依托广西大规模找矿突破项目,在区域成岩成矿理论的指导下,在罗城县记洞湾矿区展开了专项地质调查、高精度磁法和大地电磁法等物探工作,经槽探和钻探工程验证,发现数个具有工业价值的锡、铅和铜矿体,并成功钻探揭露锡矿体深部隐伏花岗岩。通过对记洞湾矿区找矿工作成果的总结与对比,初步建立了矿区地质-地球物理空间模型,认为该区锡多金属矿床的成矿规律与区域典型矿床具有相似性,成矿作用与四堡期逆冲推覆构造和雪峰期伸展构造体系存在相关性。

Relying on the large-scale ore prospecting breakthrough project in Guangxi,under the guidance of regional diagenesis and mineralization theory,this paper has carried out the special geological survey,geophysical survey of high-precision magnetic method and magnetotelluric method in Jidongwan mining area of Luocheng County.For the drilling verification,several tin,lead and copper orebodies of industrial value are discovered,and the granite rock mass relative to the tin orebodies is successfully revealed in the deep part by the drilling project.By summary and comparison of the result of this exploration work,a geological-geophysical spatial model of the Jidongwan deposit is initially established.There is a correlation between the mineralization and Sibao period thrust nappe structure and Xuefeng period extensional tectonic system.