Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S1002-0721(09)60136-8 |
Laterites-bearing REEs, Wadi Natash, Southeastern Desert, Egypt | |
Ibrahim, Mohamed El-Ahmady | |
通讯作者 | Ibrahim, Mohamed El-Ahmady |
来源期刊 | JOURNAL OF RARE EARTHS
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ISSN | 1002-0721 |
出版年 | 2010 |
卷号 | 28期号:3页码:471-476 |
英文摘要 | The present paper recorded the occurrence of laterites-bearing REEs in Natash area. Natash laterite deposits occur as horizons (5-15 m in thickness) at the boundary between the Cretaceous sandstones, and Natash flows. Laterite was recorded in more than twenty six occurrence distributed over an area of about 500 km(2) along and around Wadi Natash. It ranges in color from light-grey, dark-grey to reddish-brown. The distribution of laterite deposits is structural controlled. Mineralogical results of laterites proved the presence of both kaolinite and montmorillonite as clay minerals. The presence of hyperthene, diopside and tremolite indicated that their main source was basic Natash flows. The presence of gypsum, hematite, goethite, calcite and kaolinite indicated that, the Natash laterites were related to tropical weathering. conditions. The presence of ilmenorutile and rutile in the laterites declared the reducing and low pH. All the Natash laterite samples were characterized by very highly irregular REE pattern with HREE enrichment. Generally, the Sigma REEs+Y, ranged from 0.36%-0.71% with an average of about 0.59%. The LREE was less concentrated than the HREE by a factor of 0.57.Sigma(LREE/HREE=0.57) which suggested that, the HREE contents in laterites were derived from the basic and intermediate flows rather than from acidic lavas flows. |
英文关键词 | Natash flows laterites clay minerals REEs |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000279401000032 |
WOS关键词 | BAUXITE DEPOSITS |
WOS类目 | Chemistry, Applied |
WOS研究方向 | Chemistry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/165438 |
作者单位 | (1)Nucl Mat Author, Cairo, Egypt |
推荐引用方式 GB/T 7714 | Ibrahim, Mohamed El-Ahmady. Laterites-bearing REEs, Wadi Natash, Southeastern Desert, Egypt[J],2010,28(3):471-476. |
APA | Ibrahim, Mohamed El-Ahmady.(2010).Laterites-bearing REEs, Wadi Natash, Southeastern Desert, Egypt.JOURNAL OF RARE EARTHS,28(3),471-476. |
MLA | Ibrahim, Mohamed El-Ahmady."Laterites-bearing REEs, Wadi Natash, Southeastern Desert, Egypt".JOURNAL OF RARE EARTHS 28.3(2010):471-476. |
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