| 华南内生铀矿石结构的新认识及其成因意义 |
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| 引用本文： | 章邦桐,胡凯.华南内生铀矿石结构的新认识及其成因意义[J].地质论评,1993,39(1):31-35. |
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| 作者姓名： | 章邦桐 胡凯 |
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| 作者单位： | 南京大学地球科学系，南京大学地球科学系 |
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| 摘 要： | 在华南374和331花岗岩型铀矿床矿石内及人工合成沥青铀矿的模拟实验中均发现有针状沥青铀矿与沥青铀矿球粒紧密共生的现象。结合对沥青铀矿球粒的形态、结构、粒度及共生矿物等特征的研究,作者确认沥青铀矿球粒是球状结晶的表现,而针状及长柱状沥青铀矿则是铀氧化物相变中间产物(α-U_2O_8或β-U_3O_8)的假象。沥青铀矿的高温高压人工模拟实验表明,一些沥青铀矿在快速结晶生长过程中,由于结晶生长的限制而具有非生物成因的显微草莓状和花瓣状结构特征。
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| 关 键 词： | 铀矿床 矿石 结构 成因 |
NEW ROCOGNITION ON THE TEXTURE OF ENDOGENETC URANIUM ORE IN SOUTH CHINA AND ITS GENETIC SIGNIFICANCE |
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| Zhang Bangtong,Hu Kai.NEW ROCOGNITION ON THE TEXTURE OF ENDOGENETC URANIUM ORE IN SOUTH CHINA AND ITS GENETIC SIGNIFICANCE[J].Geological Review,1993,39(1):31-35. |
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| Authors: | Zhang Bangtong Hu Kai |
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| Institution: | Zhang Bangtong,Hu Kai Department of Earth Sciences,Nanjing University,Nanjing |
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| Abstract: | Endogenetic uranium ore possesses some different textures from common metal-lic ore. The fact that acicular and prismatic native and synthetic pitchbleude isassociated with spherical pitchblende ih granite type uranium deposits in SouthChina has demonstrated that pitchblende spherules crystallize directly from orefluids. The research on the characteristics of pitchblende spherules indicate thatthe pitchblende sphe?ules are the manifestation of spheroidal crystallization ratherthai the colloid texture as advocated by the traditional view. The micrograinedand micro-dispersed textures are the most common texture for endogenetic uraniumore. The framboidal and petatoid aggregate of synthetic pitchblende indicates theexistence of nonbiogenetic framboidal texture in metallic ore. |
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| Keywords: | acicular pitchblende pitchblende spherocrystal micrograined texture framboidal texture |
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