摘要
碳硅泥岩型铀矿为沉积内生型,具有明显的层控特征,沉积相与铀矿化关系往往是碳硅泥岩型铀矿床的研究重点。南秦岭西亚带碳硅泥岩型铀矿床的成因类型主要为沉积-热液叠加改造型,赋矿层位仅局限于中、下志留统炭硅质、泥质的富铀地层中。通过对研究区区域地质背景,沉积环境以及有利沉积相对铀成矿的控制作用研究,指出碳酸岩台地中发育的水下坳陷相整体控制着铀矿化的分布,而坳陷相中发育的硅灰岩透镜体是铀矿化定位的前提。
The carbonaceous-siliceous-pelitic rock type uranium deposits are evidently controlled by strata. Rela- tionship between Sedimentary phases and uranium mineralization is the key point of research on this type. The main genesis of such deposits in western subzone of South Qinling is hydrothermal alteration superimposed on sedi- mentation. The ore-hosting beds are only constrained in uranium-rich constructions in Middle-Lower Silurian. In- tegrated analysis of regional geological setting, sedimentary environment and uranium-controlling of favorable sedi- mentary phases in this paper proposes that the distribution of uranium mineralization was controlled by the whole underwater depression phase in carbonatite platform, and that the uranium location is premised by siliceous-lime- stone lenses developed in the depression phase.
出处
《东华理工大学学报（自然科学版）》
CAS
2012年第2期149-154,共6页
Journal of East China University of Technology(Natural Science)
基金
全国铀矿资源潜力评价--碳硅泥岩组分课题(地D0608-3)
关键词
南秦岭西亚带
碳硅泥岩型铀矿床
沉积相
western subzone of South Qinling
carbonaceous-siliceous-pelitic rock type uranium deposits
sedimentary phases
