新疆哈密市沙尔萨依地区钼钨矿地质特征及找矿标志

沙尔萨依钨钼矿位于哈尔里克火山岛弧中段,该岛弧与其南侧康古尔塔格碰撞带前身洋盆向北的俯冲有密切关系,矿体主要产于石炭纪花岗斑岩体的石英网脉中,其含钨钼石英网脉带长400 m,宽20～45 m,带内圈定钼矿体1个,钨矿体2个;含钼角岩带长1.2 km,宽8～50 m,围绕岩体呈半环状产出,该带圈定1个钼矿体,成矿潜力较大。结合区域地质背景及钨钼矿成矿特征,初步认为本区与钨钼等有关的矿化属岩浆热液充填(交代)及后期中-高温热液叠加成矿的脉状钨钼矿床。找矿标志为石炭纪花岗斑岩接触带、物探激电中阻-高极化异常位置、化探原生晕W-Mo异常直接指示钨钼矿体赋存部位、岩石蚀变(褐铁矿化、硅化、碳酸盐化等)和石英细网脉发育地段。对该地区钨钼矿矿床成因和找矿标志的研究有利于拓展阿尔格兰提地区钨钼矿产的找矿思路,也可为此类矿产的找矿方向提供借鉴。

Metallogenic geological characteristics and prospecting criteria of molybdenum-tungsten deposits in Shaersayi area, Hami, Xinjiang

The work area is located in the middle part of the hailrick volcanic island arc, which is closely related to the northward subduction of the ocean basin, the predecessor of the kanggurtag collision zone in the south. The ore body is mainly produced in the quartz network vein of the Carboniferous granitic porphyry. The tungsten molybdenum quartz network vein belt is 400 m long and 20-45 m wide, with one molybdenum ore body and two tungsten ore bodies delineated in the belt. The molybdenum hornstone belt is 1.2 km long and 8-50 m wide. The surrounding rock body is semi-circular, and a molybdenum ore body is delineated in this belt, which has great metallogenic potential. Combined with the regional geological background and the metallogenic characteristics of tungsten and molybdenum deposits, it is preliminarily considered that the mineralization related to tungsten and molybdenum in this area belongs to the vein type tungsten and molybdenum deposits formed by magmatic hydrothermal filling (metasomatism) and later middle high temperature hydrothermal superimposition. The prospecting indicators are Carboniferous granite porphyry contact zone, resistance high polarization anomaly location in geophysical IP, W-Mo anomaly of primary GEOCHEMICAL HALO, which directly indicate the occurrence location of tungsten molybdenum ore body, rock alteration (Ferritization, silicification, carbonation, etc.) and quartz fine vein development section. The study on the genesis and prospecting criteria of tungsten and molybdenum deposits in this area is conducive to expanding the prospecting ideas of tungsten and molybdenum deposits in algranti area, and also can provide reference for the prospecting direction of such minerals.