干旱区生态环境知识资源中心(Arid): Petrogenesis and tectonic evolution of late Pan-African granitiods in the El Regita area, Central Southern Sinai, Egypt: With a synopsis about Th-U distribution and Cu mineralization

Arid

DOI	10.1016/j.jafrearsci.2021.104391
	Petrogenesis and tectonic evolution of late Pan-African granitiods in the El Regita area, Central Southern Sinai, Egypt: With a synopsis about Th-U distribution and Cu mineralization
	Hassan, Imbarak S.; Dessouky, Osama K.; El Akeed, Ismail A.; Hassan, Mahmoud M.
通讯作者	Dessouky, OK (corresponding author), Nucl Mat Author Egypt, POB 530, Cairo, Egypt.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2022
卷号	185
英文摘要	The Late Precambrian intrusives in the El Regita area, central Southern Sinai at the northernmost ArabianNubian Shield, signify the typical evolutionary Pan-African magmatic stages. Geochemical and mineralogical variation from calc-alkaline (I-type) quartz-monzonite and granodiorite to later mostly A-type monzogranite, syenogranite, and alkali-feldspar granite, indicates high fractionation and extensive magmatic differentiation of the same parent melt, derived from the mantle-crust interaction above the subducted oceanic plate influenced by partial melting processes. The compositional variation is linked to the tectonic evolution from regional compressional deformation to the continental crust's relaxation. The mineralogy of the studied granitoids, which are analogous to similar rocks that crop out in the North-Eastern Desert of Egypt, is consistent with the view that the Sinai region is an eastern extension of the northern Eastern Desert. Results from all geothermometers of the studied granitoids expected decreasing oxygen fugacity in the magma following temperature decrease. Based on the Al-in-hornblende geobarometer, the (I-type) granitoids represents hydrated granites emplaced at lower crustal levels than the monzogranite-syenogranite plutons. The El Regita area is characterized by structurally controlled mesothermal copper mineralization which has epi-genetic origin and is mainly related to the emplacement of granitoids in the late-collisional stage. Abnormal radioactivity levels in the El Regita area are structurally controlled and connected to highly sheared granodiorites. After leaching, uranium was redistributed and finally fixed or adsorbed by Fe-oxyhydroxides to form immobile secondary U-bearing minerals.
英文关键词	Petrogenesis Tectonic setting Mineral chemistry Granites Copper Uranium-thorium El Regita-Sinai-Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000712256900001
WOS关键词	ARABIAN-NUBIAN SHIELD ; SOLAF METAMORPHIC COMPLEX ; CENTRAL EASTERN DESERT ; A-TYPE-GRANITOIDS ; CALC-ALKALINE ; CRUSTAL EVOLUTION ; ORIGIN ; CONSTRAINTS ; CHEMISTRY ; DISCRIMINATION
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/2XILL650/374464
作者单位	[Hassan, Imbarak S.] Publ Author Appl Educ & Training, Sci Dept, Coll Basic Educ, Adailiya 73251, Kuwait; [Hassan, Imbarak S.; Hassan, Mahmoud M.] Suez Canal Univ, Fac Sci, Geol Dept, Ismailia 41522, Egypt; [Dessouky, Osama K.; El Akeed, Ismail A.] Nucl Mat Author Egypt, POB 530, Cairo, Egypt
推荐引用方式 GB/T 7714	Hassan, Imbarak S.,Dessouky, Osama K.,El Akeed, Ismail A.,et al. Petrogenesis and tectonic evolution of late Pan-African granitiods in the El Regita area, Central Southern Sinai, Egypt: With a synopsis about Th-U distribution and Cu mineralization[J],2022,185.
APA	Hassan, Imbarak S.,Dessouky, Osama K.,El Akeed, Ismail A.,&Hassan, Mahmoud M..(2022).Petrogenesis and tectonic evolution of late Pan-African granitiods in the El Regita area, Central Southern Sinai, Egypt: With a synopsis about Th-U distribution and Cu mineralization.JOURNAL OF AFRICAN EARTH SCIENCES,185.
MLA	Hassan, Imbarak S.,et al."Petrogenesis and tectonic evolution of late Pan-African granitiods in the El Regita area, Central Southern Sinai, Egypt: With a synopsis about Th-U distribution and Cu mineralization".JOURNAL OF AFRICAN EARTH SCIENCES 185(2022).