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The Agadir Slide offshore NW Africa: Morphology, emplacement dynamics, and potential contribution to the Moroccan Turbidite System
Li, Wei1; Krastel, Sebastian1; Alves, Tiago M.; Urlaub, Morelia3; Mehringer, Lisa4,5; Schuerer, Anke4,5; Feldens, Peter6; Cross, Felix1; Stevenson, Christopher J.; Wynn, Russell B.
2018
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume498Pages:436
AbstractA newly identified large-scale submarine landslide on the NW African margin (Agadir Slide) is investigated in terms of its morphology, internal architecture, timing, and emplacement processes using high-resolution multibeam bathymetry data, 2D seismic profiles, and gravity cores. The Agadir Slide is located south of the Agadir Canyon at a water depth ranging from 500 m to 3,500 m, showing an estimated affected area of approximately 5,500 km(2). The analysis of the Agadir Slide's complex morphology reveals the presence of two headwall areas and two slide fairways (the Western and Central slide fairways). Volume calculations indicate that similar to 340 km(3) of sediment were accumulated downslope along the slide fairways (similar to 270 km(3)) and inside the Agadir Canyon (similar to 70 km(3)). Stratigraphic correlations based on five gravity cores indicate an emplacement age of 142 +/- 1 ka for the Agadir Slide. However, its emplacement dynamics suggest that the slide was developed in two distinct, successive stages. The presence of two weak layers (glide planes) is a major preconditioning factor for the occurrence of slope instability in the study area, and local seismicity related to fault activity and halokinesis likely triggered the Agadir Slide. Importantly, the Agadir Slide neither disintegrated into sediment blocks nor was transformed into turbidity currents. The emplacement timing of the Agadir Slide does not correlate with any turbidites cored downslope across the Moroccan Turbidite System. (C) 2018 Elsevier B.V. All rights reserved.
DepartmentMSG
KeywordAgadir submarine slide turbidity current multibeam bathymetry Moroccan Turbidite System Northwest Africa
DOI10.1016/j.epsl.2018.07.005
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17687
Collection中科院边缘海地质重点实验室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Christian Albrechts Univ Kiel, Inst Geosci, Otto Hahn Pl 1, D-24118 Kiel, Germany
3.Alves, Tiago M.] Cardiff Univ, Sch Earth & Ocean Sci, Seism Lab 3D, Main Bldg,Pk Pl, Cardiff CF10 3AT, S Glam, Wales
4.GEOMAR Helmholtz Ctr Ocean Res Kiel, Wischhofstr 1-3, D-24148 Kiel, Germany
5.Univ Bremen, Fac Geosci, Ctr Marine Environm Sci, Klagenfurter Str, D-28359 Bremen, Germany
6.Univ Bremen, MARUM, Ctr Marine Environm Sci, Klagenfurter Str, D-28359 Bremen, Germany
7.Leibniz Inst Balt Sea Res, D-18119 Rostock, Germany
8.Stevenson, Christopher J.] Univ Liverpool, Sch Earth Ocean & Ecol Sci, Liverpool L69 3GP, Merseyside, England
9.Wynn, Russell B.] Natl Oceanog Ctr, European Way, Southampton SO14 32H, Hants, England
Recommended Citation
GB/T 7714
Li, Wei,Krastel, Sebastian,Alves, Tiago M.,et al. The Agadir Slide offshore NW Africa: Morphology, emplacement dynamics, and potential contribution to the Moroccan Turbidite System[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,498:436, 449.
APA Li, Wei.,Krastel, Sebastian.,Alves, Tiago M..,Urlaub, Morelia.,Mehringer, Lisa.,...&Wynn, Russell B..(2018).The Agadir Slide offshore NW Africa: Morphology, emplacement dynamics, and potential contribution to the Moroccan Turbidite System.EARTH AND PLANETARY SCIENCE LETTERS,498,436.
MLA Li, Wei,et al."The Agadir Slide offshore NW Africa: Morphology, emplacement dynamics, and potential contribution to the Moroccan Turbidite System".EARTH AND PLANETARY SCIENCE LETTERS 498(2018):436.
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