干旱区生态环境知识资源中心(Arid): Ra's Abdah of the north Eastern Desert of Egypt: the role of granitic dykes in the formation of radioactive mineralization, evidenced by zircon morphology and chemistry

Arid

DOI	10.1007/s11631-016-0103-9
	Ra's Abdah of the north Eastern Desert of Egypt: the role of granitic dykes in the formation of radioactive mineralization, evidenced by zircon morphology and chemistry
	Omran, Ali A.; Dessouky, Osama K.
通讯作者	Dessouky, OK
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2016
卷号	35 期号:4 页码:368-380
英文摘要	Syenogranitic dykes in the north of Egypt's Eastern Desert are of geological and economic interest because of the presence of magmatic and supergene enrichment of radioactive mineralization. Zircon crystal morphology within the syenogranitic dykes allows precise definition of sub-alkaline series granites and crystallized at mean temperature of about 637 A degrees C. The growth pattern of the zircons suggest magmatic and hydrothermal origins of radioactive mineralization. Hydrothermal processes are responsible for the formation of significant zircon overgrowth; high U-zircon margins might have occurred contemporaneously with the emplacement of syenogranitic dykes which show anomalous uranium (eU) and thorium (eTh) contents of up to 1386 and 7330 ppm, respectively. Zircon chemistry revealed a relative increase of Hf consistent with decreasing Zr content, suggesting the replacement of Zr by Hf during hydrothermal activity. Visible uranium mineralization is present and recognized by the presence of uranophane and autunite.
英文关键词	Syenogranitic dykes Zircon Morphology Typology Uranium Egypt
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000387333800005
WOS关键词	CRUSTAL EVOLUTION ; GEOCHEMISTRY ; INDICATORS ; SYSTEMS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331654
作者单位	[Omran, Ali A.; Dessouky, Osama K.] Nucl Mat Author, POB 530, Cairo, Egypt
推荐引用方式 GB/T 7714	Omran, Ali A.,Dessouky, Osama K.. Ra's Abdah of the north Eastern Desert of Egypt: the role of granitic dykes in the formation of radioactive mineralization, evidenced by zircon morphology and chemistry[J],2016,35(4):368-380.
APA	Omran, Ali A.,&Dessouky, Osama K..(2016).Ra's Abdah of the north Eastern Desert of Egypt: the role of granitic dykes in the formation of radioactive mineralization, evidenced by zircon morphology and chemistry.ACTA GEOCHIMICA,35(4),368-380.
MLA	Omran, Ali A.,et al."Ra's Abdah of the north Eastern Desert of Egypt: the role of granitic dykes in the formation of radioactive mineralization, evidenced by zircon morphology and chemistry".ACTA GEOCHIMICA 35.4(2016):368-380.