有机地球化学在重建砂岩型铀矿形成物理化学环境方面的应用前景

从铀的活化、迁移、沉淀、成矿以及保存等几方面综述了有利于砂岩型铀形成的物理化学环境。有机质在铀矿富集成矿的各个阶段起着重要的作用,各种有机地球化学方法已被用于揭示铀矿中有机质的特征,如元素分析、Rock-Eval热解、气相色谱和红外光谱分析、色谱-质谱分析、裂解色谱-质谱及显微光谱技术、紫外荧光光谱分析1、3C核磁共振、碳/氢同位素分析等;同时结合鄂尔多斯盆地铀矿富集的有利地质条件阐述了有机地球化学在重建砂岩型铀矿形成条件中的应用前景。

Perspective of Organic Geochemistry Applied on Reconstructing Physico-Chemical Environment of the Formation of the Sandstone-Type Uranium Deposit

A comprehensive review on the favorable physico-chemical environment,including uranium mobilization,activation,transportation,precipitation,mineralization and conservation,for forming sandstone-type uranium deposits has been given in this paper.The organic matters played an important role in the above phases for the uranium enrichment and mineralization.Various organic geochemical methods are used to reveal the characteristics of organic matters in uranium deposits.They include elemental analysis,Rock-eval,gas chromatography,infrared spectroscopy,gas chromatography-mass spectrometry,pyrolysis gas chromatography-mass spectrometry,and microspectroscopic technique,UV Fluorescence spectroscopy,~(13)C NMR,carbon/hydrogen isotopic analysis etc.In addition,the application perspective of organic geochemistry on the reconstruction the metllogenic environment of the sandstone-type uranium deposits has been elucidated in combination with the favorable geological conditions for the uranium enrichment in the Ordos basin.