干旱区生态环境知识资源中心(Arid): Pre-Neoproterozoic basement evolution of southwestern Egypt

Arid

DOI	10.1080/00206814.2018.1552842
	Pre-Neoproterozoic basement evolution of southwestern Egypt
	Zhang, Wen 1,2; Pease, Victoria 2; Whitehouse, Martin J.3; El-Sankary, Mohamed M.4; Shalaby, Mahmoud H.4
通讯作者	Zhang, Wen
来源期刊	INTERNATIONAL GEOLOGY REVIEW
ISSN	0020-6814
EISSN	1938-2839
出版年	2019
卷号	61 期号:15 页码:1909-1926
英文摘要	The only surviving Archaean fragment of the Saharan Metacraton is exposed in the Uweinat-Kamil Mountains of Egypt, Libya, and Sudan. To expand our knowledge of this rare Archaean crustal fragment, we investigate protolith ages and the timing of metamorphic events associated with it via U-Pb zircon geochronology and geochemistry of 10 samples from the Egyptian part of the Uweinat-Kamil region. Our work confirms that the orthogneisses represent a tonalite, trondhjemite, granodiorite (TTG) and granite suite of Archaean-early Paleoproterozoic age (3.25-2.49 Ga). Late Paleoproterozoic rocks include 2.15-2.00 Ga paragneiss, 2.00 Ga metagranite and 1.99 Ga trondhjemitic leucosome. Neodymium isotopes from the 3.25 Ga orthogneiss record an entirely juvenile mantle signature, whereas the 2.91 and 2.49 Ga orthogneisses record significant juvenile mantle input, and 2.86-2.68 Ga orthogneisses reflects recycling of older crustal rocks. At c. 2.0 Ga, a magmatic and metamorphic event associated with anatectic partial melting occurred in northern Africa, assimilating both granitic and leucocratic gneiss of the Archaean TTG crust. Detrital input contributing to the paragneiss was mainly from Uweinat-Kamil TTG rocks and sources to the east-southeast. The oldest 3.42 Ga detrital zircon from the paragneiss probably reflects the conjoined Saharan Metacraton-Congo craton.
英文关键词	Archaean Paleoproterozoic zircon geochronology geochemistry Sahara Metacraton
类型	Article
语种	英语
国家	Peoples R China ; Sweden ; Egypt
收录类别	SCI-E
WOS记录号	WOS:000477966500006
WOS关键词	PB ZIRCON GEOCHRONOLOGY ; EAST-AFRICAN OROGEN ; U-PB ; WEST-AFRICA ; PAN-AFRICAN ; ISOTOPIC SYSTEMATICS ; ARABIAN SHIELD ; ND ; GEOCHEMISTRY ; DESERT
WOS类目	Geology
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/2XILL650/216318
作者单位	1.Chinese Acad Geol Sci, Key Lab Deep Earth Dynam, Inst Geol, Minist Nat Resources, Beijing 100037, Peoples R China; 2.Stockholm Univ, Dept Geol Sci, Stockholm, Sweden; 3.Swedish Museum Nat Hist, Dept Geosci, Stockholm, Sweden; 4.Nucl Mat Author, Cairo, Egypt
推荐引用方式 GB/T 7714	Zhang, Wen,Pease, Victoria,Whitehouse, Martin J.,et al. Pre-Neoproterozoic basement evolution of southwestern Egypt[J],2019,61(15):1909-1926.
APA	Zhang, Wen,Pease, Victoria,Whitehouse, Martin J.,El-Sankary, Mohamed M.,&Shalaby, Mahmoud H..(2019).Pre-Neoproterozoic basement evolution of southwestern Egypt.INTERNATIONAL GEOLOGY REVIEW,61(15),1909-1926.
MLA	Zhang, Wen,et al."Pre-Neoproterozoic basement evolution of southwestern Egypt".INTERNATIONAL GEOLOGY REVIEW 61.15(2019):1909-1926.