岷县三角地金矿成矿地质条件及成因分析

Metallogenic geological conditions and genesis analysis of the Sanjiaodi gold deposit in Minxian County

岷县三角地金矿主要矿体产出于二叠系崖下组地层石英脉中,矿体受北西西向断裂构造控制,矿石类型属含黄铁矿化石英脉型,围岩多为深灰色泥质粉砂岩。通过地质勘查结合以往地质资料对其成因分析,岷县三角地金矿矿床成因类型为中低温热液型矿床,认为该区域找矿地质条件优越,具较好找矿前景。

The main ore bodies of the Triangle Gold Mine in Minxian County are located in the quartz veins of the Permian Yaxia Formation.The ore bodies are controlled by northwest trending fault structures,and the ore type belongs to the pyrite mineralization quartz vein type.The surrounding rocks are mostly dark gray argillaceous siltstone.Through geological exploration combined with previous geological data,the genetic type of the Minxian Triangle Gold Mine deposit is classified as a medium to low temperature hydrothermal type deposit.It is believed that the geological conditions for ore exploration in this area are superior and have good prospecting prospects.