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DOI10.1016/j.epsl.2018.02.014
Cenozoic to Cretaceous paleomagnetic dataset from Egypt: New data, review and global analysis
Perrin, Mireille1; Saleh, Ahmed2
通讯作者Perrin, Mireille
来源期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
EISSN1385-013X
出版年2018
卷号488页码:92-101
英文摘要

Different phases of igneous activity took place in Egypt during the Mesozoic and the Cenozoic and oriented samples were collected from three Cenozoic localities (Baharya oasis in the Western Desert, Abu Had in the Eastern Desert and Quseir along the Red Sea coast), and four Cretaceous localities (Toshki & Abu Simbel south of Aswan, and Shalaten & Abu Shihat along the Red Sea coast). Rock magnetic properties of the samples indicate magnetite and titanomagnetite as the main carrier of the remanent magnetization. Following stepwise demagnetization, characteristic remanent directions were identified only for 62% of the samples, a fairly low rate for that type of samples, and 8 new paleomagnetic poles were calculated. All our Cenozoic poles fall clearly off Master Polar Wander Paths proposed for South Africa. Therefore, all paleomagnetic results, previously published for Egypt, were compiled from Cretaceous to Quaternary. The published poles largely overlap, blurring the Egyptian Apparent Polar Wander Path. A new analysis at the site level was then carried out. Only poles having a kappa larger than 50 were selected, and new pole positions were calculated by area and by epoch, when at least 3 sites were available. Even though the selection drastically reduced the number of considered poles, it allows definition of a reliable Cenozoic apparent polar wander trend for Egypt that differs from the South African Master Polar Wander Path by about 10-15 degrees. If the Cretaceous igneous poles are in good agreement with the rest of the African data, the sedimentary poles plot close to the Cenozoic portion of the South African Master Polar Wander Path, a discrepancy that could be related either to inclination flattening and/or error on age and/or remagnetization in the Cenozoic. (C) 2018 Elsevier B.V. All rights reserved.


英文关键词paleomagnetism Cenozoic Cretaceous Egypt
类型Article
语种英语
国家France ; Egypt
收录类别SCI-E
WOS记录号WOS:000430032900009
WOS关键词WESTERN DESERT ; RED-SEA ; SEDIMENTARY-ROCKS ; POLAR WANDER ; BASALTS ; MA ; DEPRESSION ; MAGMATISM ; SOUTHWEST ; HISTORY
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208600
作者单位1.Aix Marseille Univ, CNRS, IRD, Coll France,CEREGE, Aix En Provence, France;
2.Natl Res Inst Astron & Geophys, Cairo, Egypt
推荐引用方式
GB/T 7714
Perrin, Mireille,Saleh, Ahmed. Cenozoic to Cretaceous paleomagnetic dataset from Egypt: New data, review and global analysis[J]. French National Research Institute for Sustainable Development,2018,488:92-101.
APA Perrin, Mireille,&Saleh, Ahmed.(2018).Cenozoic to Cretaceous paleomagnetic dataset from Egypt: New data, review and global analysis.EARTH AND PLANETARY SCIENCE LETTERS,488,92-101.
MLA Perrin, Mireille,et al."Cenozoic to Cretaceous paleomagnetic dataset from Egypt: New data, review and global analysis".EARTH AND PLANETARY SCIENCE LETTERS 488(2018):92-101.
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