中国碳硅泥岩型铀矿床时空演化规律

中国海相碳硅泥岩建造空间分布上受控于陆缘裂谷体系、陆缘裂陷体系、陆缘盆地体系及陆缘活动带断陷台沟体系，而大规模铀成矿作用与陆缘裂谷、陆缘裂陷环境下由海底喷流作用和海底火山喷发而沉积形成的热水沉积硅质岩、硅质磷块岩和碳硅质泥岩组成的含铀海相碳硅泥岩建造密切相关。铀矿床的空间分布受热液叠加改造驱动力条件制约，受红盆边缘断裂沟通效应影响。铀矿体的空间定位受切穿碳硅泥岩含铀建造的深大断裂及其派生的次级断裂、层间破碎带和联合断裂型复合带的控制。铀成矿时代则与形成热液叠加改造驱动力源的构造岩浆活化期相一致。

Temporal and Spatial Evolution Pattern of Carbonaceous-Siliceous- Argillaceous Rock Type Uranium Deposits in China

Abstract： Carbonaceous-siliceos-argillaceos uranium deposits in China are controlled spatially by the con- tinental margin rift valley systems, borderland basin systems and epicontinental active downfaulted aula- cogen systems. And large-scale uranium mineralization is controlled by uraniferous marine carbonaceous- siliceous-argillaceous rock, which was settled down with submarine backwash and submarine volcanic e ruption in margin rift valley and continental margin rifting mineralizing environment. Its positional distri- bution is restricted by the driving force of hydrothermal fluid superposition and transformation and is af- fected by the fault in the boundary of red basin related to uranium deposit. The spatial location of urani- um ore body is controlled by subsidiary fracture, interstratal fracture zone and combined fault belt, which are derived by discordogenic fault linked to uraniferous construction of marine carbonaceous-sili- ceous-argillaceous rock. The age of uranium mineralization is accordant with tectonic-magmatic action which drove the hydrothermal fluid to superpose and transform the urnaniferous formation.