湘西北黑色岩系非常规铀资源成矿地质特征及成矿时代  

Geological Features and Metallogenic Age of Unconventional Uranium Resources of Black-rock Series in Northwestern Hunan

作　　者：王健[1] 漆富成[1] 李治兴[1] 王文全[1] 张文东 王振云[1] WANG Jian;QI Fucheng;LI Zhixing;WANG Wenquan;ZHANG Wendong;WANG Zhenyun(Beijing Research Institute of Uranium Geology,CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,中核集团铀资源勘查与评价技术重点实验室,北京100029

出　　处：《铀矿地质》2020年第1期28-33,共6页Uranium Geology

基　　金：中国核工业地质局铀矿地质科研项目“湘中地区黑色岩系非常规铀资源调查及预测评价”(编号:地D1703)资助。

摘　　要：湘西北黑色岩系非常规铀资源主要包括:铀多金属磷块岩型、含铀磷块岩型、含铀黑色岩层型,其中铀多金属磷块岩型叠加含铀黑色岩层型的矿化组合,主要发育在扬子陆块东南缘的慈利断陷盆地中;3种类型共同叠加的矿化组合,主要发育在扬子陆块东南缘的晓平坳陷中。通过对湘西北地区黑色岩系非常规铀资源成矿时代的研究,获得两组成矿年龄分别为(718±87)Ma和(503±29)Ma,结合矿化地层发育特征,认为两组年龄中形成较早的含铀磷块岩型非常规铀资源是晚期铀多金属磷块岩型的成矿预富集阶段。Unconventional uranium resources of black-rock series in Northwestern Hunan mainly include,uranium-polymetallic phosphorite, uranium-bearing phosphorite and uranium-bearing black-rock series.The mineralization combination of uranium-polymetallic phosphorite and uranium-bearing black-rock series mainly distribute in Cili graben basin which is in the southeastern margin of the Yangtze block. The three types superposed mineralization mainly distributes in Xiaoping graben basin in the southeastern margin of the Yangtze block. Based on the analyses of metallogenic age of uranium-bearing black-rock series in Northwestern Hunan, two metallogenic age was identified;(718±87)Ma and(503±29)Ma. By analyzing the characteristics of mineralized strata, the earlier forming age of uranium-bearing phosphorite was believed to be the pre-concentration stage of the late mineralization of uranium-polymetallic phosphorite.

关 键 词：非常规铀资源 湘西北 黑色岩系 成矿时代 

分 类 号：P619.14[天文地球—矿床学]