兴海县什多龙铅锌矿地质特征及成矿规律分析

Analysis of geological characteristics and metallogenic regularity of duolong lead-zinc in Xinghai County

青海省什多龙铅锌矿是鄂拉山成矿带一个铅锌为中型规模,银为小型规模的综合性矿床。矿床成因类型属接触交代矽卡岩型铅锌矿床。矿体赋存于花岗斑岩或花岗闪长岩与碳酸盐岩接触带及其附近,成矿母岩岩性、产状对矿化有较大影响,铅锌矿化标高不同而异。地表矽卡岩母岩、各种石英蚀变岩,特别是透辉矽卡岩是明显的热液蚀变迭加的广义矽卡岩,对寻找铅锌矿有利。中酸性—酸性侵入岩与碳酸盐岩接触带及其附近,是寻找接触交代矽卡岩矿床的有利地段。目前提交的资源量,什多龙铅锌矿已达中型矿床规模。但是,仍有扩大矿床规模的可能。

Qinghai Shiduolong Pb Zn ore Elashan metallogenic belt is a medium-sized scale lead-zinc silver deposit, comprehensive small scale. The genesis of the deposit belongs to the metasomant skarn type lead-zinc deposit. Ore bodies occur in the contact zone of granite porphyry or granodiorite and carbonate rocks and their vicinity. The lithology and occurrence of ore forming parent rocks have great influence on mineralization. The lead and zinc mineralization elevation is different. The surface skarn parent rocks and quartz altered rocks, especially the diabase skarn, are obvious generalized skarn superimposed by hydrothermal alteration, which is favorable for finding lead-zinc deposits. The contact zone between acid - acid - acid intrusive rocks and carbonate rocks and their vicinity is a favorable area for finding contact metasomatic skarn deposits. The amount of resources currently submitted, Shiduolong Pb Zn ore deposit is a middle scale. However, there is still a possibility of enlarging the scale of the deposit.