干旱区生态环境知识资源中心(Arid): Mineralogical and natural radioactivity investigations of Wadi El Reddah stream sediments

Arid

DOI	10.1080/03067319.2020.1796991
	Mineralogical and natural radioactivity investigations of Wadi El Reddah stream sediments
	Mira, Hamed I.; Abed, Neveen S.; Tantawy, Hesham R.; Tawfic, A. F.
通讯作者	Tawfic, AF
来源期刊	INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
ISSN	0306-7319
EISSN	1029-0397
英文摘要	Wadi El Reddah (valley), Central Eastern Desert, Egypt extends in North-South direction, it represents a semi-closed basin with only one outlet in its northern tip. Wadi El Reddah is mainly surrounded by scattered exposures in a sequence of metagabbro-diorite and metavolcanics complex in addition to wide sector of Hammamat sedimentary rocks, monzongranites of Gabal El Reddah, perthitic leucogranites of Gabal Gattar as well as swarms of post-granitic dykes. The studied sediments showed wide variation in their Uranium, Thorium, Radium (eU) and potassium (K%) contents. Uranium ranges from 5 to 51 ppm, with an average of 17.33 ppm, Th contents between 16 and 141 ppm, with 32.47 ppm as an average. Ra (eU) varies between 5 and 26 ppm with an average of 9.56 ppm. While potassium falls between 2.19% and 4.41% with an average of 3.19%. The disequilibrium conditions in the stream sediments under investigation indicated that they are mostly recent which is due to the fact that most of the radiometric measurements are lower than the chemical measurements. eTh/eU ratio values of old uranium deposits in the studied sediments suggested mineralisation in an environment of rapid deposition of rock detritus and poor weathering with the dominance of detrital radioactive minerals like thorite, samarskite, euxenite and xenotime.
英文关键词	Radioactivity wadi El Reddah minerals uranium thorium
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000555254000001
WOS关键词	SOUTHWESTERN SINAI ; ORE ; URANIUM
WOS类目	Chemistry, Analytical ; Environmental Sciences
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328127
作者单位	[Mira, Hamed I.; Abed, Neveen S.] Nucl Mat Author, Cairo, Egypt; [Tantawy, Hesham R.] Mil Tech Coll, Chem Engn Dept, Cairo, Egypt; [Tawfic, A. F.] Mil Tech Coll, Nucl Engn Dept, Cairo, Egypt
推荐引用方式 GB/T 7714	Mira, Hamed I.,Abed, Neveen S.,Tantawy, Hesham R.,et al. Mineralogical and natural radioactivity investigations of Wadi El Reddah stream sediments[J].
APA	Mira, Hamed I.,Abed, Neveen S.,Tantawy, Hesham R.,&Tawfic, A. F..
MLA	Mira, Hamed I.,et al."Mineralogical and natural radioactivity investigations of Wadi El Reddah stream sediments".INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY