干旱区生态环境知识资源中心(Arid): Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity

Arid

DOI	10.1007/s12517-021-07626-x
	Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity
	Saleh, Salah; Moustafa, Adel R.; Pohanka, Vladimir
通讯作者	Saleh, S (corresponding author), NRIAG, Natl Res Inst Astron & Geophys, Helwan 11421, Egypt.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14 期号:13
英文摘要	We use the harmonic gravity inversion to image the crustal structures beneath the northern Red Sea and its onshore area in Egypt (Central Eastern Desert, CED) and to explore the origin of their seismicity. Modeled vertical sections show that the CED has strongly heterogeneous continental crust dominated by NW-SE- to NNW-SSE-oriented density-low anomalies that indicate highly fractured areas of the crust. In contrast, a prominent density-high anomaly is observed at 10-40 km depth along the Red Sea rift, representing shallow hot anomalous upper mantle. A NW-SE-oriented density-high at 25 km depth in the CED west of Safaga represents crustal thinning associated with extension of the African Plate. Density slices at 2-40 km depths show the effect of Precambrian, ENE-oriented structures in the continental crust on the alignment of young volcanoes and magma chambers in the northern Red Sea. These Precambrian structures acted as channels through which magma was intruded and were reactivated in some areas like Abu Dabbab, Marsa Alam, and the Nile Valley forming earthquake belts. Our 3D density model, when combined with updated gravity data and seismic tomography, offers better resolution for deep structures than the previous 2D forward results and serves as a physical property reference to better understand the structure beneath the Red Sea area.
英文关键词	Northern Red Sea Central Eastern Desert of Egypt Inherited pre-rift structures 3D gravity inversion Gravity anomaly Seismicity
类型	Review
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000677560900018
WOS关键词	EASTERN DESERT ; SAUDI-ARABIA ; SHEAR ZONES ; ABU-DABBAB ; RIFT ; GULF ; DEFORMATION ; CONSTRAINTS ; TRANSITION ; 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/2XILL650/362536
作者单位	[Saleh, Salah] NRIAG, Natl Res Inst Astron & Geophys, Helwan 11421, Egypt; [Moustafa, Adel R.] Ain Shams Univ, Dept Geol, Cairo 11566, Egypt; [Pohanka, Vladimir] Slovak Acad Sci, Earth Sci Inst, Geophys Div, Dubravska Cesta 9,POB 106, Bratislava 84005, Slovakia
推荐引用方式 GB/T 7714	Saleh, Salah,Moustafa, Adel R.,Pohanka, Vladimir. Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity[J],2021,14(13).
APA	Saleh, Salah,Moustafa, Adel R.,&Pohanka, Vladimir.(2021).Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity.ARABIAN JOURNAL OF GEOSCIENCES,14(13).
MLA	Saleh, Salah,et al."Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity".ARABIAN JOURNAL OF GEOSCIENCES 14.13(2021).