湘西北含铀多金属黑色岩系矿化元素组合划分及矿物赋存特征  

Association Type of Mineralization Elements and Mineral Occurrence of Uranium Polymetallic-bearing Black-rock Series in Northwestern Hunan

作　　者：王健[1] 漆富成[1] 王文全[1] 王振云[1] 张文东 WANG Jian;QI Fucheng;WANG Wenquan;WANG Zhenyun;ZHANG Wendong(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,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》2021年第6期1049-1056,共8页Uranium Geology

基　　金：中国核工业地质局地勘费项目“湘桂黔黑色岩系铀多金属成矿条件与成矿远景预测研究”(编号:地D2104)和“浅表开放体系铀成矿作用模拟实验研究”(编号:地D2001)联合资助。

摘　　要：文章将湘西北地区的含铀多金属黑色岩系划分为3种类型的矿化元素组合,分别为:U-V-Ni-Mo型、U-V-Cu型和U-V型。相比上地壳,U-V-Ni-Mo型矿化中Mo的浓集系数达到了1539.74,U为40.54;U-V-Cu型矿化中,Mo的浓集系数降低为204.02,U含量变化不明显,为34.22;U-V型矿化中Ni、Mo含量进一步降低,而U含量增高为上地壳的111.26倍。U-V-Ni-Mo型矿化中发现的铀矿物以晶质铀矿和沥青铀矿为主,Mo主要以胶硫钼矿的形式存在,Ni主要以含镍黄铁矿、辉砷镍矿等独立的矿物形式存在;U-V-Cu型矿化中铀矿物以钛铀矿和晶质铀矿为主,多金属矿物有闪锌矿、金红石、砷黝铜矿等;U-V型矿化中铀矿物以沥青铀矿为主,多金属矿物种类较少。整个湘西北地区V均主要以黏土吸附和类质同象形式存在,没有发现钒的独立矿物。Element association of uranium polymetallic-mineralization in black-rock series in northwestern Hunan was divided into 3 types:U-V-Ni-Mo type,U-V-Cu type,U-V type.Compared to the content of upper crust,Mo was enriched by 1539.74 times,U was enriched by 40.54 times in U-V-Ni-Mo type mineralization,but in U V-Cu type mineralization,the concentration coefficient of Mo reduced to 204.02 while U changed little;in U-V type mineralization,Ni and Mo decreased further and the U increased to 111.26 times.In U-V-Ni-Mo type mineralization,the uranium mineral were mainly uraninite and pitchblende and Mo mostly in the form of jordisite,Ni mostly in the form of pentlandite and gersdorffite.In U-V-Cu type mineralization,the uranium mineral were mainly brannerite and uraninite,the polymetallic mineral are mainly blende,rutile,tennatite.In U-V type mineralization,the uranium mineral was mostly in the form of pitchblende and less sort of polymetallic mineral,the primary existence form of V were clay adsorption and isomorphism.

关 键 词：铀多金属 黑色岩系 元素组合 矿物赋存 湘西北 

分 类 号：P619.14[天文地球—矿床学]