摘要
前寒武纪铀矿床形成年代老,经历了多期变质作用,在铀矿物学上具有不同的特征。本文以几个有代表意义的铀矿床为研究对象,从铀矿物物理性质、光学性质、化学组分、晶体结构及热力学等几方面来阐明不同类型的铀矿物特点,从而为解决矿床成因问题提供依据。
Three economic uranium mineral species, uraninite. metapetchblende and petchblende. have been recognized in the precambrian uranium deposit in Liaoning Prevince. Their crystal form, and physical and chemical properties are different. The crystals of the uraninite are cubical, their cellparameter is 5. 4406 A-5. 4513A, with an ideal chemical formula. 9U02 2U03 2pb0 and an isotopic dating about 2100m. y. The petchblende is characterized by oolitic and reniform colloid with cells of 5.3976 A-5. 420A, and an ideal chemical formula 12UO2. 15UO3.pbo. Their isotopic dating is about9 1800m. y. The physical and chemical properties of the meta-petchblende are varying beween the uraninite and the petchlende. This uranium mineral species is characterized by reniform and oolitic aggregatesof grain crystals,with cells of 5.4422A-5. 455A, and an ideal chemical formula 5UO2. UO2. Pbo. Their isotopic dating is about 1900m. y.The three economic uranium minerals are closely related in their genesis. The uraninite occurs in the metamorphic rocks as uranium source. The meta-petchblende ocurrs in the lowest part and is closely near the source bed, and the petchblende is far away from the souice bed and just forms veins.
出处
《吉林大学学报（地球科学版）》
EI
CAS
1982年第S1期155-164,172,共11页
Journal of Jilin University：Earth Science Edition
