新疆阿希勒金矿地质特征及成矿远景分析

Geological Characteristics and Ore Prospecting of the Axile Gold Deposit in Habahe County,Xinjiang Province

阿希勒勘查区位于额尔齐斯金矿成矿带上,邻近有赛都金矿、多拉纳萨依金矿等大-中型矿床及一些小矿点。矿区断裂构造以北西向为主,有北东向构造次级构造均对成矿有利。与阿希勒金矿成矿有关的哈巴河岩体金-铜异常显著,在异常的中部已经发现矿体露头。含金矿脉两侧有一定规律的蚀变分带。成矿作用可以分成三个阶段,其中第二、三阶段矿脉的含量较高。矿体的赋存表现为雁行排列或出现在主构造带的弧形断裂内侧或与次级构造的交汇处,矿体有尖灭再现的规律。本文建立的勘查模型,有利于类似矿点的找矿勘探工作。

The Axile exploration area lies in the Erqis gold-copper metallogenic zone. There are several medium-and-large scale gold deposits near the Axile, such as Duolanasayi and Saidu. Northwestem regional faults are developed, while gold-bearing veins are controlled by some northeast seconda- ry faults. The Habahe plagioclase-granite intrusion shows higher copper-gold background value which makes the spots a favorable point for exploration and the gold veins are just at the abnormal site. Wallroek alteration zonings can be distinguished from gold-bearing veins to adjacent wallrocks. There are three mineralization stages, and the third stage has high gold grade. The regulations of the veins can be described by an echelon arrangement or by thin out intensively which mainly exist at the inner-arc fault. An exploration model is presented in the paper so as to benefit further prospecting.