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阿尔金山东段处于青藏高原北缘,NEE走向阿尔金构造带的东段,为祁连山成矿带被新生代阿尔金断裂左旋走滑截切的西延部分,具有良好的成矿地质条件。该文在总结阿尔金山东段成矿规律和矿床特征的基础上,采集测试了地表黄钾铁矾和褐铁矿化蚀变岩光谱曲线,在ETM+影像上提取了相关蚀变信息,并结合分析地质、地球化学信息,根据预测矿种的差异性,运用证据权法在GIS平台上建立了不同矿种的找矿模型。依据多元信息找矿模型,共圈定和评价了金矿远景区4个,铁矿远景区2个,铅锌(铜)多金属矿远景区7个。对不同矿种部分远景区进行野外验证表明,预测区岩石多发育韧脆性变形和不同类型矿化,指示较好的找矿潜力,此次研究对阿尔金山东段地区的找矿工作具有指导意义。
The eastern part of the Altun Mountains is located in the northern margin of the Qinghai-Tibet Plateau. The NEE extends to the eastern segment of the Altyn Tagh structural belt. It is a western extension of the Qilian Mountain metallogenic belt controlled by the left-lateral strike-slip of the Cenozoic Altyn Tagh fault and has good geological conditions for ore-forming. Based on the summary of the metallogenic regularity and deposit characteristics of the eastern part of the Altun Mountains, this paper collected and tested the spectral curves of alteration rocks of the jarosite and limonite on the surface, extracted the relevant alteration information on the ETM + images and combined them Based on the analysis of geological and geochemical information, based on the prediction of the difference of mineral species, the paper establishes the prospecting model of different minerals on the GIS platform by the method of the right of evidence. Based on the multi-information prospecting model, a total of 4 gold prospecting areas, 2 gold prospect areas and 7 lead-zinc (copper) polymetallic ore prospecting areas were delineated and evaluated. The field verification of some mineral prospecting areas shows that the ductile brittle deformation and different types of mineralization in the multi-development of the rocks in the prediction area indicate a good potential for prospecting. This study is instructive for the prospecting work in the eastern part of the Altun Mountains .