Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jafrearsci.2014.06.010 |
Oppositely dipping thrusts and transpressional imbricate zone in the Central Eastern Desert of Egypt | |
Abd El-Wahed, Mohamed A. | |
通讯作者 | Abd El-Wahed, Mohamed A. |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
EISSN | 1879-1956 |
出版年 | 2014 |
卷号 | 100页码:42-59 |
英文摘要 | This paper documents the 40-60 km wide ENE-WSW trending Mubarak-Barramiya shear belt (MBSB) in the Central Eastern Desert of Egypt by examining its structural styles, kinematics and geometry. Our study revealed the existence of prevalent dextral and minor sinistral conjugate shear zones. The MBSB is metamorphic belt (greenschist-amphibolite) characterized by at least three post-collisional (740-540 Ma) ductile Neoproterozoic deformation events (D-1, D-2 and D-3) followed by a brittle neotectonic deformation (D-4). DI event produced early top-to-the-northwest thrust displacements due to NW-SE shortening. Dy produced discrete zones of NNW-trending upright folds and culminated in initiation of major NW-trending sinistral shear zones of the Najd Fault System (NFS, at c. 640-540 Ma ago) as well as steeply dipping Sy foliation, and shallowly plunging L-2 lineation. NW-to NNW-trending Fy folds are open to steep and vary in plunge from horizontal to vertical. Dy deformational fabrics are strongly overprinted by D-3 penetrative structures. D-3 is characterized by a penetrative S-3 foliation, steeply SE- to NW-plunging and shallowly NE-plunging stretching lineations (L-3), asymmetric and sheath folds (F-3) consistent with dextral sense of movement exhibited by delta- and sigma-type porphyroclast systems and asymmetric boudinage fabrics. D-2-D-3 represent a non-coaxial progressive event formed in a dextral NE- over NW-sinistral shear zone during a partitioned transpression in response to E-W-directed compression during oblique convergence between East and West Gondwana developed due to closure of the Mozambique Ocean and amalgamation of the Arabian-Nubian Shield in Cryogenian-early Ediacaran time. (C) 2014 Elsevier Ltd. All rights reserved. |
英文关键词 | Mubarak-Barramiya shear belt Central Eastern Desert Oppositely dipping thrusts Dungash Um Khariga Dextral transpression |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000345473200004 |
WOS关键词 | ARABIAN-NUBIAN SHIELD ; NAJD FAULT SYSTEM ; SHEAR ZONE ; AFRICAN OROGEN ; CORE COMPLEX ; GNEISSIC COMPLEX ; BARRAMIYA AREA ; GOLD DEPOSITS ; SAUDI-ARABIA ; EVOLUTION |
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/2XILL650/182886 |
作者单位 | (1)Tanta Univ, Fac Sci, Dept Geol, Tanta 31527, Egypt |
推荐引用方式 GB/T 7714 | Abd El-Wahed, Mohamed A.. Oppositely dipping thrusts and transpressional imbricate zone in the Central Eastern Desert of Egypt[J],2014,100:42-59. |
APA | Abd El-Wahed, Mohamed A..(2014).Oppositely dipping thrusts and transpressional imbricate zone in the Central Eastern Desert of Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,100,42-59. |
MLA | Abd El-Wahed, Mohamed A.."Oppositely dipping thrusts and transpressional imbricate zone in the Central Eastern Desert of Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 100(2014):42-59. |
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