新疆巴里坤县老爷庙金矿地质特征及找矿方向探讨

Characters of Geology and Prospecting Directions of Laoyemiao Gold Deposit,Balikun County,Xinjiang

新疆巴里坤县老爷庙金矿产于准噶尔—东天山褶皱系北部塔尔巴哈-荒草坡亚带额任山复背斜西南翼近核部。矿区主要地层为下石炭统黑山头组和第四系沉积物。矿体产于黑山头组第二亚组安山质晶屑凝灰岩的石英脉中,属于内生热液蚀变形成的石英脉型矿床。在区域造山运动作用下,形成了该矿区特有的构造格架和岩浆侵位。经过多期次热液活动叠加,以及岩浆热液与围岩的活化萃取作用,进而在有利部位富集成矿,形成了老爷庙金矿。在分析区域地质背景基础上,对矿区地层单元、构造格架、岩浆热液活动及围岩蚀变等特征进行了分析研究,并将其与邻近矿区的地质特征和成矿模式类比,总结出该矿的矿床成因,并得出其控矿因素和找矿标志。最后结合该矿现有情况,提出今后找矿方向建议。

The Laoyemiao gold deposit is produced in the southwest wing and near the core of the E＇ renshan anticlinorium of the Ta＇erbaha-Huangchaopo subzone of the north of the Junggar-Eastern Tianshan fold system. It＇ s main stratum are Heishantou group of the Lower Carboniferous Series and the Quaternary sediments. It＇ s ore bodies originate in quartz veins that distribute in the andesitic crystal tuff of the second subgroup of Heishantou Group. It＇ s quartz vein type deposit that is formed by the endogenetic hydrothermal alteration. On account of the action of the regional orogeny, the tectonic framework and the magmatie emplacement of the deposit are informed. Through the superposition of many times hydrothermal activities, the activation and extraction effect happen between magmatic hydrothermal and surrounding rock. Laoyemiao gold deposit is informed in the favorable position. On the basis of studing the regional geological background, some of the features are analyzed, including the strata unit of the mining area, tectonic framework, magmatic thermal fluid wall rock alteration and so on. At the same time, geological characteristics and metallogenic model are compared with adjacent mining areas. Through the above, it＇ s genesis of mineral deposit, orecontrolling factors and prospecting marks are sumed up. According to the existing situation of this mine, the future prospecting direction suggestion is provided.