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DOI | 10.1016/j.jafrearsci.2006.04.011 |
The significance of gneissic rocks and synmagmatic extensional ductile shear zones of the Barud area for the tectonics of the North Eastern Desert, Egypt | |
Fowler, Abdel-Rahman; Ali, Khaled G.; Omar, Sayed M.; Eliwa, Hassan A. | |
通讯作者 | Fowler, Abdel-Rahman |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
EISSN | 1879-1956 |
出版年 | 2006 |
卷号 | 46期号:3页码:201-220 |
英文摘要 | The mainly tonalitic gneissic rocks, amphibolites, schists and rarer migmatites of the Barud area, at the southern margin of the Egyptian North Eastern Desert (NED) have previously been viewed as products of ultrametamorphism or granitization of pre-PanAfrican basement. The Qena-Safaga Line of approximately NW-striking steeply dipping faults was also regarded as marking the boundary between these NED rocks and the low grade metavolcanics and ophiolitic melange of the Central Eastern Desert (CED). Detailed investigation of the Barud area indicates that the amphibolites, schists and migmatites formed by shearing and medium grade metamorphism of similar are metavolcanics to those of the CED in normal shear sense extensional ductile shear zones heated by numerous synkinematic dolerite, gabbro, diorite, granodiorite, tonalite and granite dykes. They are thus hot sheared equivalents of the CED metavolcanics and basic arc plutonites, accompanied by sheared mafic and felsic intrusive rocks, and are not deep-seated crystalline basement rocks. The shear zones are interpreted as having formed by arc-rifting, not necessarily reaching the stage of marginal basin formation. Arc-accretion structures and those produced by later orogen squeezing are also described. The somewhat gneissic Barud Tonalitic is found to be entirely magmatic. Following intrusion of the Barud Tonalite, and before or during Hammamat and Dokhan deposition, the NED experienced a rapid uplift relative to the CED (similar to 620-600 Ma) that was not achieved by thrusting along the Qena-Safaga Line. (c) 2006 Elsevier Ltd. All rights reserved. |
英文关键词 | neoproterozoic North Eastern Desert extensional hot ductile shear zones amphibolites arc tectonics Qena-Safaga Line |
类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000241478700004 |
WOS关键词 | ARABIAN-NUBIAN SHIELD ; SOUTHEAST SINAI PENINSULA ; DOKHAN VOLCANIC SUITE ; PAN-AFRICAN TERRAIN ; CRUSTAL EVOLUTION ; ACCRETIONARY TECTONICS ; ISOTOPIC CONSTRAINTS ; NORTHEASTERN DESERT ; CORE COMPLEX ; SAUDI-ARABIA |
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/2XILL650/151818 |
作者单位 | (1)United Arab Emirates Univ, Dept Geol, Fac Sci, Al Ain, Abu Dhabi, U Arab Emirates;(2)Egyptian Nucl Mat Author, Cairo, Egypt;(3)Menoufia Univ, Dept Geol, Fac Sci, Shibin Al Kawm, Egypt |
推荐引用方式 GB/T 7714 | Fowler, Abdel-Rahman,Ali, Khaled G.,Omar, Sayed M.,et al. The significance of gneissic rocks and synmagmatic extensional ductile shear zones of the Barud area for the tectonics of the North Eastern Desert, Egypt[J],2006,46(3):201-220. |
APA | Fowler, Abdel-Rahman,Ali, Khaled G.,Omar, Sayed M.,&Eliwa, Hassan A..(2006).The significance of gneissic rocks and synmagmatic extensional ductile shear zones of the Barud area for the tectonics of the North Eastern Desert, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,46(3),201-220. |
MLA | Fowler, Abdel-Rahman,et al."The significance of gneissic rocks and synmagmatic extensional ductile shear zones of the Barud area for the tectonics of the North Eastern Desert, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 46.3(2006):201-220. |
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