干旱区生态环境知识资源中心(Arid): The effect of the Najd shear deformation on the Pan-African belt of the central Egyptian Nubian Shield: a synthesis for the post-collision tectonic events

Arid

DOI	10.1016/j.jseaes.2021.105022
	The effect of the Najd shear deformation on the Pan-African belt of the central Egyptian Nubian Shield: a synthesis for the post-collision tectonic events
	Hagag, Wael; Hamimi, Zakaria; Abdelnasser, Amr
通讯作者	Hagag, W (corresponding author), Benha Univ, Fac Sci, Geol Dept, Banha 13518, Egypt.
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2022
卷号	224
英文摘要	This study concerns the structural setting of the central Egyptian-Nubian Shield (El Shalul area) utilizing field-structural, remote sensing, petrological and geochemical data. The exposed basement comprises ophiolitic-melange, arc-related metavolcanics, metasediments, metagabbro-diorites and granitoids. The area experienced two stages of deformation, pre-Najd (similar to 850-630 Ma) and Najd-related (similar to 630-580 Ma). The pre-Najd stage is represented by the assembly of arc-terranes and their N-ward extrusion while the Najd-related stage encompasses three deformation phases. D-1 is post-collision extensional event, depicting lateral spreading of tectonic terranes and NW-ejection of ophiolites. The emplacement of El Shalul granite (similar to 630 Ma) and deposition of molasse sediments in E-W and NW-SE extensional basins (Zeidun and Meesar) are D-1- related. Following extension is a protracted phase of compression, shearing and transpression. It was commenced with NW-SE shortening (D-2) and deformed the extensional basins by folding and thrusting with mild effect on the other basement units. Sinistral shearing (D-3a) and transpression (D-3b) along the NW-trending faults superseded the D-2 compression, while dextral shearing (D-3c) on the ENE-WSW and NE-SW faults overprinted the NW-SE penetrative structures and controlled the emplacement of post-granitic dykes. The significant conclusions of this study include (1) El Shalul granite complex is a large alkaline granitic sheet emplaced during a post-collision extensional regime and suffered the subsequent similar to 630-580 Ma top-to-NW sinistral shearing and SW-directed thrusting (not a gneissic core complex) and (2) The NW-SE and NE-SW structural trends are not conjugated.
英文关键词	El Shalul Shear Zone Post-collision extension Central Eastern Desert Najd Shear Deformation Arabian-Nubian Shield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000729115500001
WOS关键词	CENTRAL EASTERN DESERT ; MAJOR-ELEMENT CHEMISTRY ; A-TYPE GRANITES ; U-PB ; GEOCHEMICAL DISCRIMINATION ; CRUSTAL EVOLUTION ; ARABIAN SHIELD ; CORE COMPLEX ; GNEISS DOME ; HISTORY
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/2XILL650/374507
作者单位	[Hagag, Wael; Hamimi, Zakaria; Abdelnasser, Amr] Benha Univ, Fac Sci, Geol Dept, Banha 13518, Egypt
推荐引用方式 GB/T 7714	Hagag, Wael,Hamimi, Zakaria,Abdelnasser, Amr. The effect of the Najd shear deformation on the Pan-African belt of the central Egyptian Nubian Shield: a synthesis for the post-collision tectonic events[J],2022,224.
APA	Hagag, Wael,Hamimi, Zakaria,&Abdelnasser, Amr.(2022).The effect of the Najd shear deformation on the Pan-African belt of the central Egyptian Nubian Shield: a synthesis for the post-collision tectonic events.JOURNAL OF ASIAN EARTH SCIENCES,224.
MLA	Hagag, Wael,et al."The effect of the Najd shear deformation on the Pan-African belt of the central Egyptian Nubian Shield: a synthesis for the post-collision tectonic events".JOURNAL OF ASIAN EARTH SCIENCES 224(2022).