甘肃西秦岭地区金矿控矿因素及找矿方向

The Ore Control Factors of Gold Deposits and Prospecting Direction in West Qinling of Gansu Province

秦岭造山带地质构造复杂,各类金属矿产丰富,分布广泛,特别是甘肃西秦岭地区是我国重要的金矿成矿区(带),也是甘肃最主要的金矿勘查开发基地。近年来,西秦岭地区金矿找矿取得重大突破,先后发现和评价了大水、早子沟、大桥、李坝、拉尔玛、阳山、寨上、竹园北、加甘滩等超大型、大型金矿床。笔者从西秦岭地质构造背景、成矿区带划分入手,分析金矿成矿类型和金矿成矿的控制因素,探讨金矿成矿地球化学特征,提出西秦岭地区金矿找矿方向,对该区勘查工作部署具有参考意义。

The geological structures are complicated in Qinling Orogenic Belt with the abundance of many metallic mineral resources. The west Qinling region of Gansu Province is the most important gold prospecting and mining areas, meanwhile it is a famous gold metallogenic zone in China. Recently, there are some breakthrough of gold exploration, among which some superlarge and large gold deposits , such as Dashui, Zaozigou, Daqiao, Liba, Laerma, Yangshan, Zaishang, Zhuyuanbei, Jiagantan etc. in this region are discovered and evaluated. By studying geology, geological structure and gold metallogenesis of west Qinling. The paper summarizes features of metallogenic zones and sub-zones, discusses geochemical characteristics of gold deposits, and provides the scheme of prediction for gold prospecting targets. This paper has reference value for investigation work deployment in the study area.