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中国的钨矿资源丰富,矿床集中出现在南方,主要是依靠露头观察直接发现的。如何在覆盖区寻找钨矿?目前仍主要依靠化探异常线索,施工槽探或钻探揭露矿体。大量的找矿实践证明,这种方法在覆盖区发现钨矿床的成功概率很低。本文提出“地物化三场异常耦合”的找矿预测基本思路,通过3个找矿实例予以阐释。1.成矿条件分析:钨是典型的壳源元素,成矿作用主要发生在显生宙花岗岩浆演化晚期的高温热液阶段。主要的钨矿成矿类型有:石英脉(带)型、矽卡岩型、云英岩型、斑岩型及岩体型等,可形成延深千米的垂直分带规律。
China is rich in tungsten ore resources. The deposits are concentrated in the south mainly through direct observation through outcrop observation. How to look for tungsten ore in the coverage area? At present, we still depend mainly on anomalous clues to geochemical exploration to expose the ore body by slotting or drilling. A large number of prospecting practices have proved that this method has a very low probability of success in discovering tungsten deposits in the coverage area. This paper presents the basic idea of ore prospecting prediction of “three geochemical anomalies coupled with geophysics”, which is illustrated by three prospecting examples. 1. Analysis of metallogenic conditions: Tungsten is a typical crustal source element, and the metallogenesis mainly occurred in the late stage of hydrothermal hydrothermal phase in the Phanerozoic granite magma. The main types of tungsten ore mineralization are: quartz vein (belt) type, skarn type, cloud rock type, porphyry type and rock type, can form the vertical zoning depth of 1000 meters.