辽宁葫芦岛赵家屯夕卡岩型锌铜银多金属矿找矿标志研究

    Prospecting indicators for Zhaojiatun skarn-type zinc-copper-silver polymetallic deposit in Huludao, Liaoning Province

    • 摘要: 辽宁葫芦岛赵家屯锌铜银多金属矿位于杨家杖子-八家子钼多金属成矿带,杨家杖子钼矿的西南部. 矿床主要赋存于灰岩与夕卡岩接触带和夕卡岩带中,矿石主要金属矿物为闪锌矿、黄铜矿,矿石结构为不规则粒状、他形粒状结构,矿石构造以条带状、浸染状为主. Ⅰ号矿体Zn品位平均为4.27%, Ag品位平均为3.01×10-6; Ⅱ号矿体Zn品位为6.60%, Ag品位为8.50×10-6; Ⅲ号矿体Cu品位为0.74%, Ag品位为25.90×10-6. 通过矿床地质特征分析,初步推断赵家屯锌铜银多金属矿为接触交代热液成因的夕卡岩型矿床. 区内夕卡岩、矿化蚀变及物化探异常带为主要的找矿标志. 圈定了1号成矿远景区和2号成矿远景区,可为该区下一步勘查找矿工作提供参考.

       

      Abstract: The Zhaojiatun zinc-copper-silver polymetallic deposit in Huludao of Liaoning Province is located on the southwest of Yangjiazhangzi molybdenum deposit within the Yangjiazhangzi-Bajiazi molybdenum polymetallic metallogenic belt. The ore bodies are primarily hosted in the limestone-skarn contact zone and skarn layers, with sphalerite and chalcopyrite as the dominant metallic minerals. The ores exhibit irregular granular, xenomorphic granular textures and banded or disseminated structures. The average grades are 4.27% of Zn and 3.01×10-6 of Ag for Ore Body Ⅰ, 6.60% Zn and 8.50×10-6 Ag for Ore Body Ⅱ, and 0.74% Cu and 25.90×10-6 Ag for Ore Body Ⅲ. Based on the analysis of geological characteristics, it is preliminarily inferred that the Zhaojiatun Zn-Cu-Ag polymetallic deposit is of skarn-type formed by contact metasomatism hydrothermal processes. The skarn zones, mineralized alterations, and geophysical-geochemical anomalies serve as key prospecting indicators in the area. Two prospective metallogenic target areas (No. 1 and No. 2) have been delineated, providing references for further exploration and prospecting efforts in the region.

       

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