Arid
DOI10.1016/j.jafrearsci.2018.02.014
Integration of remote sensing, geochemical and field data in the Qena-Safaga shear zone: Implications for structural evolution of the Eastern Desert, Egypt
El-Din, Gamal Kamal1; Abdelkareem, Mohamed2,3
通讯作者Abdelkareem, Mohamed
来源期刊JOURNAL OF AFRICAN EARTH SCIENCES
ISSN1464-343X
EISSN1879-1956
出版年2018
卷号141页码:179-193
英文摘要

The Qena-Safaga shear zone (QSSZ) represents a significant structural characteristic in the Eastern Desert of Egypt. Remote Sensing, field and geochemical data were utilized in the present study. The results revealed that the QSSZ dominated by metamorphic complex (MC) that intruded by syn-tectonic granitoids. The low angle thrust fault brings calc-alkaline metavolcanics to overlie MC and its association. Subsequently, the area is dissected by strike-slip faults and the small elongated basins of Hammamat sediments of Precambrian were accumulated. The MC intruded by late-to post-tectonic granites (LPG) and Dokhan Volcanics which comprise felsic varieties forming distinctive columnar joints. Remote sensing analysis and field data revealed that major sub-vertical conspicuous strike-slip faults (SSF) including sinistral NW-SE and dextral ca. E-W shaped the study area. Various shear zones that accompanying the SSF are running NW-SE, NE-SW, E-W, N-S and ENE-WSW. The obtained shear sense presented a multiphase of deformation on each trend. i.e., the predominant NW-SE strike-slip fault trend started with sinistral displacement and is reactivated during later events to be right (dextral) strike slip cutting with dextral displacement the E-W trending faults; while NE-SW movements are cut by both the N-S and NNW- SSE trends. Remote sensing data revealed that the NW-SE direction that dominated the area is associated with hydrothermal alteration processes. This allowed modifying the major and trace elements of the highly deformed rocks that showed depletion in SiO2 and enrichments in Fe2O3, MnO, Al2O3, TiO2, Na2O, K2O, Cu, Zn and Pb contents. The geochemical signatures of major and trace elements revealed two types of granites including I-type calc-alkaline granites (late-to post-tectonic) that formed during an extensional regime. However, syn-tectonic granitoids are related to subduction-related environment. (C) 2018 Published by Elsevier Ltd.


英文关键词Remote sensing Structures Shear zone Qena-safaga Egypt
类型Article
语种英语
国家Saudi Arabia ; Egypt ; USA
收录类别SCI-E
WOS记录号WOS:000429512000015
WOS关键词METAMORPHIC CORE COMPLEX ; THEMATIC MAPPER DATA ; MEATIQ DOME ; GRANITIC-ROCKS ; CLASSIFICATION ; DEFORMATION ; DISCRIMINATION ; MAGMATISM ; MELANGE ; FLOW
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/2XILL650/210382
作者单位1.Prince Sattam Bin Abdulaziz Univ, Al Kharj, Saudi Arabia;
2.South Valley Univ Qena, Fac Sci, Geol Dept, Qena 83523, Egypt;
3.Boston Univ, Ctr Remote Sensing, Boston, MA 02215 USA
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El-Din, Gamal Kamal,Abdelkareem, Mohamed. Integration of remote sensing, geochemical and field data in the Qena-Safaga shear zone: Implications for structural evolution of the Eastern Desert, Egypt[J],2018,141:179-193.
APA El-Din, Gamal Kamal,&Abdelkareem, Mohamed.(2018).Integration of remote sensing, geochemical and field data in the Qena-Safaga shear zone: Implications for structural evolution of the Eastern Desert, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,141,179-193.
MLA El-Din, Gamal Kamal,et al."Integration of remote sensing, geochemical and field data in the Qena-Safaga shear zone: Implications for structural evolution of the Eastern Desert, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 141(2018):179-193.
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