DOI: 10.1016/j.epsl.2018.01.030
Scopus记录号: 2-s2.0-85044280451
论文题名: Evidence of hotspot paths below Arabia and the Horn of Africa and consequences on the Red Sea opening
作者: Vicente de Gouveia S. ; Besse J. ; Frizon de Lamotte D. ; Greff-Lefftz M. ; Lescanne M. ; Gueydan F. ; Leparmentier F.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 487 起始页码: 210
结束页码: 220
语种: 英语
英文关键词: heat-flow
; hotspot
; hotspot reference frame
; Red Sea
; rifting
Scopus关键词: Basalt
; Lakes
; Oil wells
; Tectonics
; Cenozoic volcanism
; Geological features
; Hot spot
; Isotopic signatures
; Red sea
; Reference frame
; rifting
; Volcanic activities
; Heat transfer
; Arabian plate
; continental lithosphere
; flood basalt
; heat flow
; hot spot
; rifting
; volcanism
; Afar
; Arabian Peninsula
; East African Lakes
; Horn of Africa
; Indian Ocean
; Lake Victoria
; Red Sea [Indian Ocean]
; Calluna vulgaris
英文摘要: Rifts are often associated with ancient traces of hotspots, which are supposed to participate to the weakening of the lithosphere. We investigated the expected past trajectories followed by three hotspots (Afar, East-Africa and Lake-Victoria) located around the Red Sea. We used a hotspot reference frame to compute their location with respect to time, which is then compared to mantle tomography interpretations and geological features. Their tracks are frequently situated under continental crust, which is known to strongly filter plume activity. We looked for surface markers of their putative ancient existence, such as volcanism typology, doming, and heat-flow data from petroleum wells. Surface activity of the East-Africa hotspot is supported at 110 Ma, 90 Ma and 30 Ma by uplift, volcanic activity and rare gas isotopic signatures, reminiscent of a deep plume origin. The analysis of heat-flow data from petroleum wells under the Arabian plate shows a thermal anomaly that may correspond to the past impact of the Afar hotspot. According to derived hotspot trajectories, the Afar hotspot, situated (at 32 Ma) 1000 km north-east of the Ethiopian–Yemen traps, was probably too far away to be accountable for them. The trigger of the flood basalts would likely be linked to the East-Africa hotspot. The Lake-Victoria hotspot activity appears to have been more recent, attested only by Cenozoic volcanism in an uplifted area. Structural and thermal weakening of the lithosphere may have played a major role in the location of the rift systems. The Gulf of Aden is located on inherited Mesozoic extensional basins between two weak zones, the extremity of the Carlsberg Ridge and the present Afar triangle, previously impacted by the East-Africa hotspot. The Red Sea may have opened in the context of extension linked to Neo-Tethys slab-pull, along the track followed by the East Africa hotspot, suggesting an inherited thermal weakening. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110014
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR, CNRS 7154, 1 rue Jussieu, Paris 05, 75252, France; Département Géosciences et Environnement, Université de Cergy-Pontoise, Cergy-Pontoise, France; Total EP, Pau, France; Géosciences Montpellier, Université de Montpellier, CNRS, UMR 5243, Montpellier, France; Total EP, Paris La Défense, France
Recommended Citation:
Vicente de Gouveia S.,Besse J.,Frizon de Lamotte D.,et al. Evidence of hotspot paths below Arabia and the Horn of Africa and consequences on the Red Sea opening[J]. Earth and Planetary Science Letters,2018-01-01,487