全国碳硅泥岩型铀矿资源潜力评价

基于对海相碳硅泥岩含铀建造形成构造环境、成矿规律的系统研究,笔者提出中国碳硅泥岩型铀矿床形成的4种成矿体系类型：陆缘裂谷成矿体系、陆缘裂陷深断裂带成矿体系、陆块边缘陆缘盆地体系及陆缘活动带断陷台沟成矿体系;指出中国碳硅泥岩型铀矿的大规模成矿作用受控于陆缘裂谷和陆缘裂陷成矿环境下形成、伴随海底喷流作用和海底火山喷发而沉积的海相碳硅泥岩富铀建造。依据大型矿集区铀资源评价预测特征参数群,文章通过建立重点矿集区碳硅泥岩型铀矿资源矿集带预测评价判据和成矿预测体系,对中国碳硅泥岩型铀矿资源潜力进行总体评价。

The Potantial Evaluation of Carbonaceous-Siliceous-Argillaceous Rock Type Uranium Resources in China

Based on systematic study on structural environment and metallogenic pattern of uraniferous formation of marine carbonaceous-siliceous-argillaceous rocks in China,four types of mineralization systems was proposed,which include margin rift valley system,epicontinental rift-deep fracture zone system,borderland basin system and epicontinental active downfaulted aulacogen system.Large-scale uranium mineralization of carbonaceous-siliceous-argillaceous rock is believed to be controlled by uraniferous marine carbonaceous-siliceous-argillaceous rocks which were settled down with submarine backwash and submarine volcanic-eruption in margin rift valley and continental margin rifting environment.Characteristic parameter group of large-size mineralization cluster was applied to establish the evaluation and prediction system for typical carbonaceous-siliceous-argillaceous rock type mineralization area so as to generally evaluate the uranium resource of this type in China.