关键词: 铅锌矿, 构造叠加晕, 构造热液蚀变型矿床, 成矿规律, 找矿靶区, 深部找矿

Abstract: Dashuijing Pb-Zn Deposit in Huize County of Yunnan Province is located at the Pb-Zn polymetallic metallogenic belt of the passive continental margin of Eastern Yunnan Province of the upper Yangtze continental block of Yangtze massif，the orebodies occur in Baizuo Formation (C1b) of Lower Carboniferous.Previous prospecting studies are limited to the south extension of the 10# orebody of Huize County，88#~138# geological exploration line and the elevation of 1 261~1 031 m.There are few study results on the other areas of Dashuijing area，and no clear prospecting directions have been proposed.Through the analysis and study of regional metallogenic geological background，geological characteristics of the mining area，orebody characteristics，ore characteristics，surrounding rock alteration and metallogenic regularity，combined with the the tectonic superimposed halo by early prediction，new prospecting target areas are delineated and some related validation work is done.The study results show that:①the orebodies are stratified in coarse-crystalline dolomite，the lengths of them are larger than 395 m，vertical height of them is 258 m，average thickness of them is 4 m，occurrence information of them is 132°∠56°；②the ore minerals are mainly for sphalerite，calamine，heteropolar，galena，cerusite and pyrite，the gangue minerals are mainly for coarse crystal dolomite and calcite，the ore structures are mainly for grain structure，semidiomorphic crystalline structure，metasomatism structure，common edge structure，net vein structure and emulsion structure，the ore structures are mainly for blocky structure，banding structure，layer-like structure，veined structure，etc.；③the surrounding rock alterations are mainly for dolomization，pyritization，calcilization，fading effect，etc.；④Dashuijing Pb-Zn Deposit are controlled by strata，lithology and structure，strata is the basic condition for prospecting work，lithology and hydrothermal alteration are the important prospecting indicators，ore-controlling structures are the key areas for prospecting work，the deposit genesis belongs to tectonic hydrothermal alteration Pb-Zn deposit；⑤according to the geological characteristics and ore-controlling factors of the exposed orebodies in Dashuijing mining area，three prospecting target areas (named 1#，2# and 3#) are delineated.Through the validation work of the local area of 1# prospecting target area，following results are obtained，the amount of Pb-Zn ore of 1# orebody is 1.159×106 t，Pb metal amount is 54 133 t，Zn metal amount is 175 238 t，symbiotic sulfur amount is 223 182 t，the associated components are 31 785 kg (Ag)，44 615 kg (Ge) and 393 155 kg (Cd).Generally，the prospecting potential in 1# target area is huge，prospecting potential of 2# target is large，but the prospecting potential of 3# target area is inferior to the other two areas.

Key words: Pb-Zn deposit, Tectonic superimposed halo, Tectonic hydrothermal alteration deposit, Metallogenic regularity, Prospecting target area, Deep prospecting