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次生石英岩化生成的蚀变矿物种类较多,粘土矿物占较大比例。它们颗粒细小,往往呈鳞片状集合体共生在一起,镜下也较难区分,物相测试一般也只能确定蚀变矿物种类,较难确定矿物含量。为此,笔者在矿区工作时,针对在找矿实践中遇到的蚀变带划分问题,参考了有关资料试用矿物分子式中氧化物理论含量的百分比,对化学分析中氧化物组份进行矿物含量计算,以此对矿区蚀变带作了划分。本文就计算方法及其实际意义作一介绍,能在寻找同类矿床中确定主要蚀变矿物种类有所帮助。
There are many alteration minerals generated by secondary quartzization, and clay minerals account for a large proportion. They are small particles, often scaly aggregates symbiotic together, the microscope is more difficult to distinguish, the phase test generally only determine the type of alteration minerals, more difficult to determine the mineral content. Therefore, when working in the mining area, in the light of the problem of dividing the alteration zones encountered in ore prospecting practice, the reference is made to the percentage of theoretical oxide content in the experimental mineral formula, and the content of the oxide in the chemical analysis Calculated, as a result of the alteration zone mining area has been divided. This paper presents an introduction to the calculation method and its practical significance, which can help identify the major altered mineral species in the search for similar deposits.