摘要
本文在国内首次采用透射电子显微镜研究铀矿床中的含轴红色微晶石英，查明其中不可见铀主要是超显微状沥青铀矿和钻石形式存在，从而改变了过去普遍认为该矿物集合体中的不可见分散铀是呈吸附状态存在的认识。
Ultramicro-pitchblende and ultramicro-coffinite were firstly found in China in the aggregatesof uranium-bearing reddish microcrystalline quartz from the granite-type U-deposits in southernChina by means of transmission electron microscope (TEM). The ultramicro-pitchblende grainscommonly range from 0. 1 to 1μm in size. EDS spectra and wavelength-dispersive (WD) electronmicroprobe analyses indicate the dominance of U3O8 (81. 32～85. 17wt % ) with minor Al, Si, Feand K. Ultramicro-coffinite grains vary from 0. 2 to 0. 5μm in size and contain U2O8 (60. 86～69. 43wt % ), SiO2 (25. 72～29. 41wt % ) and trace amounts of Al, K, Fe and S. These uranium min-erals occur as inclusions in quartz or are interstitial to quartz. The pitchblende offten contains clayminerals. Pitchblendes is usually associated with coffinite because they have similar forming physi-co-chemical conditions in hydrothermal U-deposits.
出处
《矿物学报》
CAS
CSCD
北大核心
1995年第4期383-386,共4页
Acta Mineralogica Sinica
基金
国家自然科学基金!49473200
国家教委博士点科研基金
关键词
红色微晶石英
铀矿床
透射电镜
reddish microcrystalline quartz
uranium deposit
transmission electron micro-scope (TEM )
ultramicro-uranium mineral
