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甘肃岷县耳阳沟铅锌矿处于西成矿田西延地段,茶埠—沟脑里帚状构造撒开部位,铅锌矿体主要分布在耳阳沟背斜北东翼的中泥盆统榆树坪组地层中,主要岩性为硅化灰岩、板岩、钙质粉砂岩,矿体的顶底板围岩均为泥灰岩,矿体与围岩界限比较明显。矿床平均品位Pb+Zn为5.13%;伴生组分Ag、Cd等。文章通过探讨该矿床地质特征,从地质、化探等方面分析成矿条件,认为泥盆系是本区的矿源层;矿体赋存于NW向断裂蚀变带中,断裂为导矿、容矿构造,区内化探异常均与已知矿体相对应,是地质找矿的重要标志。区内围岩蚀变发育,也是重要的找矿标志。
The Ear Yanggou lead-zinc mine in Minxian County, Gansu Province is located in the west extension of Xicheng ore field and the broom-shaped tectonic spreading site of the Chabu-Gully brain. Lead-zinc orebodies are mainly distributed in the Middle Devonian Yushuping In the group strata, the main lithology is silicified limestone, slate and calcareous siltstone. The top and bottom wall rocks of the ore body are all marl, and the boundary between ore body and surrounding rock is obvious. The average ore grade Pb + Zn is 5.13%; associated components Ag, Cd and so on. By discussing the geologic characteristics of the deposit and analyzing the metallogenic conditions from the aspects of geology and geochemical exploration, the article considers that the Devonian is the source layer in this area. The ore body is in the NW-trending fault zone, and the fault is the guide ore. The tectono-tectonics and geochemical anomalies in the area correspond to the known orebodies and are an important indicator of geological prospecting. Area wall rock alteration development, is also an important indicator of prospecting.