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大椅子山铅锌多金属矿体主要赋存于矽卡岩中及华力西期黑云母花岗岩构造裂隙中,矿床成因类型分别为接触交代型、中低温热液型。接触交代型矿体以1矿体为主,长200米,平均厚度3.70米,产状30°∠55°,平均品位为Zn 3.23×10-2、Pb0.55×10-2,矿石为粒状变晶结构,蜂窝状、浸染状、细脉状构造。热液型矿体以3矿体为主,呈细脉状产出,长约240米,平均厚度0.45米,产状225°∠60°,平均品位为Pb 1.21×10-2、Zn 1.69×10-2,矿石为半自形粒状结构,细脉状、网脉状构造。
The Pb-Zn polymetallic ore bodies in the Chaoziyishan occur mainly in the skarn and the structural fractures of the bioclastic granites in the western part of the Haryclinal. The genetic types of the deposits are contact metasomatism type and intermediate-low temperature hydrothermal type respectively. The contact metasomatism is dominated by ore body 1, with a length of 200 meters and an average thickness of 3.70 meters, with a shape of 30 ° ∠55 °. The average grade is Zn 3.23 × 10-2 and Pb0.55 × 10-2. The ore is granular Crystal structure, honeycomb, disseminated, fine vein structure. The hydrothermal orebody is dominated by 3 orebodies and produced in the form of fine veins with a length of about 240 meters and an average thickness of 0.45 meters with a shape of 225 ° ∠60 ° with an average grade of Pb 1.21 × 10-2 and Zn 1.69 × 10-2, the ore is semi-self-shaped granular structure, veins, reticulate structure.