Arid
DOI10.1016/j.jseaes.2009.05.007
Genesis of kasolite associated with aplite-pegmatite at Jabal Sayid, Hijaz region, Kingdom of Saudi Arabia
Dawood, Yehia H.1,2; Harbi, Hesham M.1; El-Naby, Hamdy H. Abd1,3
通讯作者Dawood, Yehia H.
来源期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
EISSN1878-5786
出版年2010
卷号37期号:1页码:1-9
英文摘要

In this study, we report kasolite Pb(UO2)SiO4 center dot(H2O) for the first time as a main uranyl mineral in the mineralized aplite-pegmatite of Jabal Sayid, Hijaz region. It commonly forms clusters of yellow acicular crystals in the voids and fractures. The mineral chemistry and mineralogical characteristics of kasolite were investigated using different techniques. Calcium, iron and phosphorus are detected in kasolite in addition to its major constituents; uranium, lead and silicon. Lead does not exist as a radiogenic product and not even as a substitute for uranium in the mineral structure. Alternatively, galena mineralization could be considered as a source for lead. The fluoride and carbonate complexes played a significant role in the formation of kasolite. High temperature hydrothermal solutions reacted with pre-existing uranium-bearing metamictized accessory minerals such as pyrochlore, U-rich thorite and zircon to form uranous fluoride complexes. These complexes are predominant in reducing environment and at pH 4. When the fluids approached the surface passing through fracture system, the oxygen fugacity (fO(2)) and the pH increased because of the loss of volatile components. At these conditions, uranous fluorides would convert to uranyl fluoride complexes UO2F3-. Further decrease in temperature was associated with the decay of the activity of fluorine ion by the dilution of hydrothermal solutions and precipitation of fluorite. At this condition, uranyl-carbonate complexes are favoured. These complexes were combined later with silica and lead to form kasolite. (C) 2009 Elsevier Ltd. All rights reserved.


英文关键词Kingdom of Saudi Arabia Jabal Sayid Kasolite Uranyl complexes Pegmatite
类型Article
语种英语
国家Saudi Arabia ; Egypt
收录类别SCI-E
WOS记录号WOS:000272015900001
WOS关键词CENTRAL EASTERN DESERT ; RARE-EARTH-ELEMENTS ; SPENT NUCLEAR-FUEL ; SURFACE COMPLEXATION ; OXYHYDROXIDE PHASES ; URANIUM ; URANINITE ; MINERALS ; SORPTION ; GRANITE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165013
作者单位1.King Abdulaziz Univ, Fac Earth Sci, Jeddah 21589, Saudi Arabia;
2.Ain Shams Univ, Fac Sci, Dept Geol, Cairo, Egypt;
3.Nucl Mat Author, Cairo, Egypt
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Dawood, Yehia H.,Harbi, Hesham M.,El-Naby, Hamdy H. Abd. Genesis of kasolite associated with aplite-pegmatite at Jabal Sayid, Hijaz region, Kingdom of Saudi Arabia[J],2010,37(1):1-9.
APA Dawood, Yehia H.,Harbi, Hesham M.,&El-Naby, Hamdy H. Abd.(2010).Genesis of kasolite associated with aplite-pegmatite at Jabal Sayid, Hijaz region, Kingdom of Saudi Arabia.JOURNAL OF ASIAN EARTH SCIENCES,37(1),1-9.
MLA Dawood, Yehia H.,et al."Genesis of kasolite associated with aplite-pegmatite at Jabal Sayid, Hijaz region, Kingdom of Saudi Arabia".JOURNAL OF ASIAN EARTH SCIENCES 37.1(2010):1-9.
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