冕宁太洋沟铅锌矿床地质特征及成因研究

Geological Features and Brief Analysis on Genesis of Taiyanggou Pb-Zn Deposit in Mianning

四川冕宁太洋沟铅锌矿床位于康滇地轴北段之西缘,西侧为松潘-甘孜地槽褶皱系中的锦屏山造山带,东侧为安宁河断裂带。矿区构造以断裂为主,太洋沟铅锌矿床产出于断裂的破碎带中。笔者在矿区采集了典型的矿石样品,并从矿石组构、矿物共生组合、围岩蚀变、矿石地球化学特征等方面对矿石进行了综合研究,为太洋沟铅锌矿床的成矿原因提供了一定的理论依据。研究结果显示太洋沟铅锌矿床为中低温热液矿床,系铅锌含矿热液充填于断裂破碎带中而成。

Taiyanggou Pb-Zn deposit in Mianning, Sichuan lies in the western margin of the Northern part of the Kang-dian Axis. And the western side of Taiyanggou Pb-Zn deposit is Jinpingshan orogen in Songpan Garze fold system, while its eastern side is the Anninghe fault zone. The author collected the typical ore specimens in the mining area and synthetically research its characteristics from the ore fabric, paragenetic association of minerals, alteration, ore geochemical characteristics, which provides some theoretical basis for the genesis of Taiyanggou Pb-Zn deposit. The research results reveal the genesis of Taiyanggou Pb-Zn deposit is a mesothermal-low temperature deposit resulting from the of the fault. filling of the Pb-Zn ore-bearing hydorthermal solution in the fracture zone