干旱区生态环境知识资源中心(Arid): Bimodal zircon ages from Natash volcanics (southeast Egypt) and the link between eruption mechanisms and Late Cretaceous tectonics

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DOI	10.1007/s12517-019-4457-2
	Bimodal zircon ages from Natash volcanics (southeast Egypt) and the link between eruption mechanisms and Late Cretaceous tectonics
	Abu El-Rus, Mohamed Ali 1; Paquette, Jean-Louis 2; Chazot, Gilles 3; Vannucci, Riccardo 4
通讯作者	Abu El-Rus, Mohamed Ali
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2019
卷号	12 期号:9
英文摘要	Trachyte plugs from the Natash volcanic field have been precisely dated using in situ U-Pb geochronology on zircon grains at similar to 93Ma. Available zircon ages thus suggest that the overall volcanic history at Natash was probably shorter than previously estimated based on Rb-Sr and K-Ar ages, which are more sensitive to element mobility. Basaltic flows and trachyte plugs were produced by a largely synchronous, Upper Cretaceous volcanic activity that occurred in the Natash area at the onset of the extensional fracturing that preceded and accompanied the doming of the Afro-Arabian Shield. Extraction and eruption of volumetrically dominant basalts from deeper lithospheric levels were ruled by major NW-SE strike-slip faults, whereas both major and subordinate fault systems activated by successive tectonic pulses favoured the ascent of more evolved melts (i.e. trachytes and rhyolites) from shallow-level magma chambers. The study revealed also the presence of zircon xenocrysts in some trachyte plugs associated or not to magmatic zircon. These xenocrysts have pre-Cambrian ages (similar to 681Ma) matching those of zircons from basement rocks in the area (similar to 700Ma) and were most probably incorporated during the emplacement of trachyte plugs at shallow depths. The strictly bimodal ages recorded by zircons suggest a very large time gap (>500Ma) between the end of the Pan-African Orogeny and the onset of new tectono-magmatic activity in the Natash area.
英文关键词	Eastern Desert Egypt Cretaceous volcanism Natash volcanics Trachyte plugs U-Pb zircon ages
类型	Article
语种	英语
国家	Egypt ; France ; Italy
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000465549100001
WOS关键词	U-TH-PB ; EASTERN DESERT ; RED-SEA ; EVOLUTION ; RIFT ; MAGMATISM ; ELEMENT ; GEOCHRONOLOGY ; STRATIGRAPHY ; CHEMISTRY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	French National Research Institute for Sustainable Development ; E17
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214323
作者单位	1.Assiut Univ, Dept Geol, Fac Sci, Asyut 71516, Egypt; 2.Univ Clermont Auvergne, Lab Magmas & Volcans, CNRS, IRD,OPGC, F-63000 Clermont Ferrand, France; 3.Univ Brest UBO, IUEM, Geosci Ocean, UMR 6538, Pl Copernic, F-29280 Plouzane, France; 4.Univ Pavia, Dipartimento Sci Terra & Ambiente, Via Ferrata 1, I-27100 Pavia, Italy
推荐引用方式 GB/T 7714	Abu El-Rus, Mohamed Ali,Paquette, Jean-Louis,Chazot, Gilles,et al. Bimodal zircon ages from Natash volcanics (southeast Egypt) and the link between eruption mechanisms and Late Cretaceous tectonics[J]. French National Research Institute for Sustainable Development, E17,2019,12(9).
APA	Abu El-Rus, Mohamed Ali,Paquette, Jean-Louis,Chazot, Gilles,&Vannucci, Riccardo.(2019).Bimodal zircon ages from Natash volcanics (southeast Egypt) and the link between eruption mechanisms and Late Cretaceous tectonics.ARABIAN JOURNAL OF GEOSCIENCES,12(9).
MLA	Abu El-Rus, Mohamed Ali,et al."Bimodal zircon ages from Natash volcanics (southeast Egypt) and the link between eruption mechanisms and Late Cretaceous tectonics".ARABIAN JOURNAL OF GEOSCIENCES 12.9(2019).