Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 1367-9120 |
EISSN | 1878-5786 |
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 |
推荐引用方式 GB/T 7714 | 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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