摘要
贵州都匀牛角塘锌矿床是黔东铅锌矿带南端一个中偏大型矿床,产于下寒武统清虚洞组一套厚层藻鲕白云岩中,矿体呈似层状、透镜状产出,组分简单,矿石矿物为闪锌矿、黄铁矿及少量方铅矿,脉石矿物为白云石。伴生有益组分是Cd,呈类质同象赋存于闪锌矿中,具综合利用价值。矿床经历了两个成矿阶段,早期成矿作用阶段,有用组分初步富集形成顺层稀疏浸染状细粒浅色闪锌矿化,或形成低品位矿体;后期热液改造作用阶段,褶曲和断裂作用,热液活动,改造早期矿化或矿体,实现矿床再次富集,形成富矿体,并伴生较多黄铁矿。矿床属强烈改造型层控锌矿床。
The zinc deposit in Niujiaotan of Duyun, Guizhou, is a middle-large-sized one at the southern end of a zinc ore-belt in Eastern Guizhou, which occurred in a set of deep layer of gonidial dolomite in the Qingxudon Formation of Lower Cambian. Ore bodies take the shapes of layer and lens and their compositions are simple, ore minerals are sphalerite, pyrite and a little galena, and vein minerals are dolomite associated with a useful composition Cd, which exists in sphalerite in isomorphism and has comprehensive utilization value. The ore deposit experienced two minerogenetic periods. In the early minerogenetic period, useful compositions were preliminarily enriched to form bedding sparse dissemination fine-grained hypsochromic sphalerite or to form lower tenor ore-bodies. In the latter hydrothermal transformation period, fold and fault processes and hydrothermal activities transformed early mineralization or ore-bodies, causing the deposit to be enriched again, forming rich ore-bodies and associated with more pyrite. The deposit belongs to an intensely transformed stratabound zinc one.
出处
《贵州地质》
1992年第3期203-212,共10页
Guizhou Geology
