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当評价所发現的許多金屬矿化现象时,往往难于固定矿体,尤其是用肉眼察觉不到的或是在难以识别的矿化作用中。如在矽嘎岩中微細分散的白鎢矿浸染;在高嶺土化作用和輕微铁化带內的次生鉛鋅矿物;在石灰岩中微細分散的方鉛矿浸染;在网狀脈体中微晶鍚石以及在細脈浸染类型矿床中貧銅矿矿染等。为了对这些矿化現象进行評价,最常用的是刻槽取样。这种方法需要消耗大批的人力和物力,因此在坑道众多的地段里,特别是在探槽的地段里,并不經常使用刻槽取样。因为主要是在有明显的矿染标誌的地段才运用它。许多研究者(如波查里斯基、M.H.阿尔波
When evaluating many of the metallogenic phenomena that are found, it is often difficult to fix the ore body, especially invisible to the naked eye or in unidentifiable mineralization. Such as scheelite disseminated finely in scheelite; secondary lead-zinc minerals in the kaolinization and slight iron-banding; disseminated finely dispersed galena in the limestone; fine crystallites in the reticular veins Limestone, and the lean copper mine deposits in the vein types of disseminated veins. In order to evaluate these mineralization, the most commonly used groove sampling. This method requires a large amount of manpower and material resources. Therefore, groove sampling is not often used in lots of tunnels, especially in the trenches. Because it is mainly used in lots with marked markings of mineral deposits. Many researchers (such as 波查里斯基, M.H. Arpo