ZG岩体中北段断裂构造频率特征及其与铀成矿的关系

本文从断裂构造频率方面对ZG岩体中北段铀矿床矿点的赋存部位进行了统计分析,得出铀矿床矿点产出在断裂构造高频等值线星团上,特别是产在几组展布方向星团的交汇星团上。且有从高频星团内向外,铀成矿年龄由老变新的特征。断裂构造高频等值线星团是构造活动最强烈的地区,是成矿溶液活动的场所,地球化学梯度(pH,Eh)变化大,有利于铀成矿。下洞子、秀才洞、热洞、乌泥洞、庙田坝等星团区,是铀矿赋存的有利区,值得今后工作注意。

CHARACTERISTICS OF FRACTURE STRUCTURE FREQUENCY AND ITS RELATIONSHIP WITH URANIUM METALLIZATION IN THE MIDDLE-NORTHERN PART OF ZG GRANITE MASSIF

In this paper, by statistically analyzing positions of uranium deposits and mineral occurrences on the diagrams of fracture structure frequeny in the middle-northen part of ZG granite massif, the author draws the conclusion that uranium deposits and mineral occurrences are distributed in high-frequency isopleth clusters of fracture structure,especialy, in these clusters which are in the intersection positions of several distribution direction groups of clusters, and that uranium metallogenic ages are getting younger and younger from the center to thd edge of cluster. Those areas covered by fracture structure frequency isopleth clusters represent the intense tectonic active areas and the ore-forming solution active places, where geochemical gradiants (pH, Eh)change in a wide range that is favourable for uranium metallization. The areas covered by Xiadongzi, Xiucaidong, Redong, Wunidong, Miaotianba clusters, etc. are the promising areas where uranium deposits may exist and worth being paid much attontion in geological work from now on.