干旱区生态环境知识资源中心(Arid): Radiometric and mineralogical dataset of microgranite dykes and stream sediments of Ras Abda area, north Eastern Desert, Egypt

Arid

DOI	10.1016/j.dib.2019.104711
	Radiometric and mineralogical dataset of microgranite dykes and stream sediments of Ras Abda area, north Eastern Desert, Egypt
	Hassan, Mohamed; Ramadan, Fatma S.; Omran, Ali A.; El-Nahas, Hesham A.; Abu Zeid, Ehab K.
通讯作者	Hassan, M
来源期刊	DATA IN BRIEF
ISSN	2352-3409
出版年	2019
卷号	27
英文摘要	Ras Abda Area is located in the north part of the Eastern desert, and is characterized by a rugged topography and high relief. The main exposed rock units in the area comprise older granites, younger gabbros and granites as well as several types of post granite dykes (rhyolite, basic and microgranite dykes). Radiometric measurements indicated that the microgranite samples are characterized by anomalous concentrations of the radioelements which mean that the rocks originated from radioelements-bearing magma and may be subjected to epigenetic processes of leachability and migration of uranium. The stream sediments samples show low levels of radioactivity where eU ranges from 4.0 to 7.0 ppm with an average of 5.3 ppm, and eTh ranges from 6.0 to 18.0 ppm with an average of 10.65 ppm. The eTh/eU ratio ranges from 1.2 to 3.6 where the samples distal from the microgranite dykes are characterized by the highest eTh/eU ratio (3.6) while those close to the dykes have the lower eTh/eU ratios. Generally, the average eTh/eU ratio (similar to 2.08) is lower than the world ratio (3.5) implying that uranium probably enriched from an adjacent source may be the microgranite dykes. The calculated factors of equilibrium (P and D) indicated disequilibrium state for both rocks types (microgranite and stream sediments) and referred to incomplete U-decay series. Mineralogical studies revealed that the heavy minerals could be classified into: a) radioactive minerals comprising uranophane, kasolite, sklodowskite, thorite and uranothorite, and b) radioelements-bearing minerals comprising columbite, fergusonite, samarskite, pyrochlore, allanite, monazite, zircon and fluorite. The heavy minerals are mostly concentrated upstream rather than downstream; meandering portions of the stream may act as natural traps for the heavy minerals. (c) 2019 Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
英文关键词	Ras abda North eastern desert Egypt Microgranite dyke Radioactivity Mineralogy
类型	Article ; Data Paper
语种	英语
开放获取类型	DOAJ Gold, Green Published
收录类别	ESCI
WOS记录号	WOS:000501988200168
WOS关键词	ASTER DATA ; CONSTRAINTS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/333974
作者单位	[Hassan, Mohamed; Omran, Ali A.; El-Nahas, Hesham A.; Abu Zeid, Ehab K.] Nucl Mat Author, POB 530 El Maadi, Cairo, Egypt; [Ramadan, Fatma S.] Zagazig Univ, Dept Geol, Fac Sci, Zagazig 44511, Egypt
推荐引用方式 GB/T 7714	Hassan, Mohamed,Ramadan, Fatma S.,Omran, Ali A.,et al. Radiometric and mineralogical dataset of microgranite dykes and stream sediments of Ras Abda area, north Eastern Desert, Egypt[J],2019,27.
APA	Hassan, Mohamed,Ramadan, Fatma S.,Omran, Ali A.,El-Nahas, Hesham A.,&Abu Zeid, Ehab K..(2019).Radiometric and mineralogical dataset of microgranite dykes and stream sediments of Ras Abda area, north Eastern Desert, Egypt.DATA IN BRIEF,27.
MLA	Hassan, Mohamed,et al."Radiometric and mineralogical dataset of microgranite dykes and stream sediments of Ras Abda area, north Eastern Desert, Egypt".DATA IN BRIEF 27(2019).