摘要
3105地区中、上泥盆统中产有多个碳酸盐岩型铀矿床。作者在前人工作[1,2]的基础上,通过卫片解译,铀-铅同位素体系研究,氧碳同位素和诱发裂变径迹等研究,对该区的控矿构造、铀源、成矿溶液来源和成矿作用作了进一步探讨。研究结果表明:矿床的空间定位受晚古生代向斜盆地及其中的层间断裂带(F_1F_3)与北东向、东西向断裂交切复合部位及燕山期岩浆活动中心引起的环形构造联合控制;该区西部的燕山期花岗岩是成矿最重要的铀源岩;成矿溶液乃岩浆水与大气降水混合成因;铀矿床是经燕山期和喜山期多次累聚成矿作用而形成的。
Several carbonate-type uranium deposits occur in Middle-Upper Devonian series in area No.3105. Based on some previous work and by means of satellite image interpretation, studies of uranium—lead isotopic system,oxygen and carbon isotopes as well as induced fission track method, the ore-control structures, uranium sources, source of the oreforming solutions and metallization of uranium are further discussed. The results of studies suggest the location of uranium deposits is jointly controlled by Late Palaeozoic synclinal basin, the intersection parts of interformational faults (F1, F3) in the basin with NE and EW trending faults and circular structures caused by Yanshanian magmatic activity centers. Yanshanian granite in the western part of the study area is the most important source rock for uranium metallogenesis. Ore-stage solution is of a mixed origin of magmatic water and meteoric water. Uranium deposits were formed by repeatedly accumulative metallization in Yanshanian-Himalayan periods.
出处
《铀矿地质》
CSCD
北大核心
1989年第5期277-285,共9页
Uranium Geology
关键词
铀矿
泥盆纪
成矿作用
碳酸盐岩型
Devonian system, Carbonate-type uranium deposit, Accumulative metallization
