中国云南个旧地区深部可能产出隐伏铀矿床的地质背景

Geological setting of concealed uranium deposits' occurrence possibility in the deep Gejiu region, Yunnan Province, China

云南个旧地区处于华南后加里东准地槽、扬子地台、滇西地槽哀牢山褶皱带3条区域性构造及深大断裂汇接部位,历经华力西-印支期、燕山期、喜马拉雅晚期等多旋回地质构造运动和大面积岩浆作用,构成有利的成矿地球化学背景;中新生代以来,地壳活化作用的产物、地壳结构上叠活化层则构成多金属元素运移、成矿的有利场所。从个旧地区有利的地质背景,探讨该区深部赋存隐伏铀矿的可能性。

Gejiu region is located in the convergence part of three regional structures and three deep-seated faults (South China post-Caledonian parageosyncline, Yangzi Platform, Ailaoshan foldbelt in western Yunnan geosyncline), and experienced multicycle geological structural movement (Variscan-Indosinian, Yanshanian and Late Himalayan) and large-area magmatic process, these construct favorable geochemical setting for uranium deposit. The products of the crust activation since Meso-Cenozoic, the superimposed activated layer in the crust are the favorable location for the migration and ore-formation of polymetal elements.