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在前人丰富的资料基础上,我们近年来做了些研究,认为表生改造对该矿床形成有重要作用。一、基本地质特征 1.矿区处在华北地台与秦岭地槽毗邻区——北秦岭加里东褶皱带边缘,是燕山早期γ_5~(2—1)、γ_5~(2—2)的叠加区,铀丰度较高(>4.6ppm);又是不同项、不同级别三组(F_A,F_(b、c),F_D)断裂发育区,岩石遭受不同程度的碎裂,利于风化作用和铀的活化与淋蚀;又是花岗岩岩体内隆起的相对凹陷区,利于汇水,也利于铀的聚集和保存。这些是矿区定位的主要因素(图1)。
Based on the rich information of our predecessors, we have done some research in recent years and believe that the superficial transformation has an important role in the formation of this deposit. I. Basic Geological Characteristics 1. The mining area is located in the adjacent area of North China platform and Qinling terrane - the margin of Caledonian fold belt in North Qinling Mountains, which is the superposition area of γ_5 ~ (2-1) and γ_5 ~ (2-2) , Higher uranium abundance (> 4.6ppm), and also different fractures in different grades and three groups (F_A, F_ (b, c) and F_D). The rocks suffer different degrees of fragmentation and are conducive to weathering and uranium Of the activation and erosion; the granite is the body of the uplift of the relative depression area conducive to catchment, but also conducive to the accumulation and preservation of uranium. These are the main factors for the location of mines (Figure 1).