甘肃大店沟金矿控矿地质因素及成矿潜力

Ore-controlling Geological Factors and MetallogenicPotential of the DadiangouGold Deposit,Gansu Province

甘肃大店沟金矿是近年来西秦岭成矿带新发现的中型金矿,矿化类型为石英脉型和蚀变岩型。文章对控矿地质因素进行综合分析,认为矿床受地层—构造—岩浆岩联合控制形成,丹凤群地层因特殊物理化学性质提供了成矿物质和空间,北东向脆韧性剪切带为最主要控矿因素,提供了成矿热液运移、沉淀通道,印支期岩浆活动提供了热量、物质和动力。提出了主脆韧性剪切带深部和走向延伸方向、次级平行矿化带、岩浆热液多金属矿等找矿方向,并进行了成矿潜力分析。

Located in the Western QinlingMetallogenic belt,the Dadiangou gold deposit is a newly discovered mediumsized gold deposit,which mineralization types are quartz vein type and altered rock type.Based on the comprehensive analysis of ore-controlling geological factors,it is considered that the deposit is formed under the joint control of stratum,structure and magmatic rock.The strata of Danfeng Group provides ore-forming materials and space due to special physical and chemical properties,As the main ore controlling factor,the NE trending brittle-ductile shear zone provides a channel for ore-forming hydrothermal migration and precipitation.magmatism in Indosinian period provides heat,material and power.In summary the deep and strike extension direction of the main brittle-ductile shear zone,the secondary parallel ore belt and magmatic hydrothermal polymetallic ore are put forward,and the metallogenic potential is analyzed.