湖南产铀花岗岩体的某些特征
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摘要
湖南产铀花岗岩体主要分布在湘南和湘东南地区,属扬子板块南缘至华夏板块湘东南加里东褶皱区,主要有诸广山、九嶷山、苗儿山等产铀岩体,岩体是由志留、三叠纪、侏罗―白垩纪岩浆侵入体构成的大型复式花岗岩体,花岗岩具有富碱、富钾和铁镁成分较高的特征,原始铀含量高,铀钍分异明显,铀趋向侏罗纪补体富集,在较晚期次侵入体的内外接触带是铀成矿有利空间。
Uranium-bearing granite bodies of Hunan are mainly distributed in the south and southeast area of Hunan Province,which is part of Caledonian fold zone in southeastern Hunan and at the southern margin of the Yangtze plate and Cathaysian plate.This area contains uranium-bearing rock mass such as Zhuguangshan,Jiuyishan and Miao'ershan.The rock mass basically consists of large-sized complex granite bodies which are composed of Silurian,Triassic,and Jurassic-Cretaceous intrusive bodies.The granite is characterized by rich alkali and potassium and high Mg and Fe content,and it has high initial uranium content with obvious differentiation between uranium and thorium.Uranium tends to be enriched towards Jurassic complement.The favorable space for uranium mineralization is the internal or external contact zone of intrusive bodies at later stage.
Uranium-bearing granite bodies of Hunan are mainly distributed in the south and southeast area of Hunan Province,which is part of Caledonian fold zone in southeastern Hunan and at the southern margin of the Yangtze plate and Cathaysian plate.This area contains uranium-bearing rock mass such as Zhuguangshan,Jiuyishan and Miao'ershan.The rock mass basically consists of large-sized complex granite bodies which are composed of Silurian,Triassic,and Jurassic-Cretaceous intrusive bodies.The granite is characterized by rich alkali and potassium and high Mg and Fe content,and it has high initial uranium content with obvious differentiation between uranium and thorium.Uranium tends to be enriched towards Jurassic complement.The favorable space for uranium mineralization is the internal or external contact zone of intrusive bodies at later stage.
引文
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[3]谢湘雄,吉纪尼.湖南省区域重磁成果研究报告[R].湖南省地质学校,1989.
[4]舒孝敬.湘南地区航空伽玛能谱和重力场、磁场特征及其与铀成矿的关系[R].核工业二三〇研究所,1993.
[5]张祖还,章邦桐.华南产铀花岗岩及有关铀矿床研究[M].北京:原子能出版社,1991.
[6]崔振生.地面γ能谱资料研究中若干问题的探讨[J].铀矿地质,1989(3):172.
[7]杜乐天,王文广,刘正文.中国铀矿床研究评价:第1卷花岗岩型铀矿床(下册)[M].北京:中国核工业地质局,2010:974-975.
[8]覃金宁,夏泽群,肖京湘,等.湘东明月峰地区铀矿化富集规律及成矿机理探讨[M]//湖南地学新进展.长沙:湖南地图出版社,2006,11(5):113.
[9]章邦桐,张祖还.华南东部陆壳演化与铀成矿作用[M].北京:原子能出版社,1993.