Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography

Félicie Korostelev, Sylvie Leroy, Derek Keir, Abdulhakim Ahmed, Lapo Boschi, Frédérique Rolandone, Graham W. Stuart, Mathias Obrebski, Khaled Khanbari, Issa El-Hussain

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We image the lithospheric and upper asthenospheric structure beneath the central and eastern parts of the northern Gulf of Aden rifted passive continental margin with 59 broadband stations to evaluate the role of transform fault zones on the evolution of magma-poor continental margins. We used teleseismic tomography to compute a relative P wave velocity model in eastern Yemen and southern Oman down to 400 km depth. Our model shows low-velocity anomalies located in the vicinities of five major fracture zones and regions of recent volcanism. These low-velocity anomalies are likely caused by localized asthenospheric upwelling and partial melting, caused by small-scale convection promoted by gradients in the lithosphere-asthenosphere boundary topography near the fracture zones. In addition, low velocities underlie regions of elevated topography between major sedimentary basins. We suggest that locally buoyant mantle creates uplift and dynamic topography on the rift margin that affects the course of seasonal rivers and the sedimentation at the mouth of those rivers. Our new P wave velocity model suggests that the dynamic topography and recent volcanism in the central and eastern Gulf of Aden could be due to small-scale convection at the edge of the Arabian plate and/or in the vicinity of fracture zones.

Original languageEnglish
Pages (from-to)1262-1278
Number of pages17
JournalGeosphere
Volume11
Issue number5
DOIs
Publication statusPublished - 2015

Fingerprint

mantle structure
tomography
upper mantle
fracture zone
topography
P-wave
wave velocity
continental margin
volcanism
convection
anomaly
Arabian plate
transform fault
asthenosphere
river
sedimentary basin
partial melting
fault zone
lithosphere
upwelling

ASJC Scopus subject areas

  • Geology
  • Stratigraphy

Cite this

Korostelev, F., Leroy, S., Keir, D., Ahmed, A., Boschi, L., Rolandone, F., ... El-Hussain, I. (2015). Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography. Geosphere, 11(5), 1262-1278. https://doi.org/10.1130/GES01159.1

Upper mantle structure of the southern Arabian margin : Insights from teleseismic tomography. / Korostelev, Félicie; Leroy, Sylvie; Keir, Derek; Ahmed, Abdulhakim; Boschi, Lapo; Rolandone, Frédérique; Stuart, Graham W.; Obrebski, Mathias; Khanbari, Khaled; El-Hussain, Issa.

In: Geosphere, Vol. 11, No. 5, 2015, p. 1262-1278.

Research output: Contribution to journalArticle

Korostelev, F, Leroy, S, Keir, D, Ahmed, A, Boschi, L, Rolandone, F, Stuart, GW, Obrebski, M, Khanbari, K & El-Hussain, I 2015, 'Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography', Geosphere, vol. 11, no. 5, pp. 1262-1278. https://doi.org/10.1130/GES01159.1
Korostelev F, Leroy S, Keir D, Ahmed A, Boschi L, Rolandone F et al. Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography. Geosphere. 2015;11(5):1262-1278. https://doi.org/10.1130/GES01159.1
Korostelev, Félicie ; Leroy, Sylvie ; Keir, Derek ; Ahmed, Abdulhakim ; Boschi, Lapo ; Rolandone, Frédérique ; Stuart, Graham W. ; Obrebski, Mathias ; Khanbari, Khaled ; El-Hussain, Issa. / Upper mantle structure of the southern Arabian margin : Insights from teleseismic tomography. In: Geosphere. 2015 ; Vol. 11, No. 5. pp. 1262-1278.
@article{ed8ecdbda9134ee7bee1e8953135270f,
title = "Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography",
abstract = "We image the lithospheric and upper asthenospheric structure beneath the central and eastern parts of the northern Gulf of Aden rifted passive continental margin with 59 broadband stations to evaluate the role of transform fault zones on the evolution of magma-poor continental margins. We used teleseismic tomography to compute a relative P wave velocity model in eastern Yemen and southern Oman down to 400 km depth. Our model shows low-velocity anomalies located in the vicinities of five major fracture zones and regions of recent volcanism. These low-velocity anomalies are likely caused by localized asthenospheric upwelling and partial melting, caused by small-scale convection promoted by gradients in the lithosphere-asthenosphere boundary topography near the fracture zones. In addition, low velocities underlie regions of elevated topography between major sedimentary basins. We suggest that locally buoyant mantle creates uplift and dynamic topography on the rift margin that affects the course of seasonal rivers and the sedimentation at the mouth of those rivers. Our new P wave velocity model suggests that the dynamic topography and recent volcanism in the central and eastern Gulf of Aden could be due to small-scale convection at the edge of the Arabian plate and/or in the vicinity of fracture zones.",
author = "F{\'e}licie Korostelev and Sylvie Leroy and Derek Keir and Abdulhakim Ahmed and Lapo Boschi and Fr{\'e}d{\'e}rique Rolandone and Stuart, {Graham W.} and Mathias Obrebski and Khaled Khanbari and Issa El-Hussain",
year = "2015",
doi = "10.1130/GES01159.1",
language = "English",
volume = "11",
pages = "1262--1278",
journal = "Geosphere",
issn = "1553-040X",
publisher = "Geological Society of America",
number = "5",

}

TY - JOUR

T1 - Upper mantle structure of the southern Arabian margin

T2 - Insights from teleseismic tomography

AU - Korostelev, Félicie

AU - Leroy, Sylvie

AU - Keir, Derek

AU - Ahmed, Abdulhakim

AU - Boschi, Lapo

AU - Rolandone, Frédérique

AU - Stuart, Graham W.

AU - Obrebski, Mathias

AU - Khanbari, Khaled

AU - El-Hussain, Issa

PY - 2015

Y1 - 2015

N2 - We image the lithospheric and upper asthenospheric structure beneath the central and eastern parts of the northern Gulf of Aden rifted passive continental margin with 59 broadband stations to evaluate the role of transform fault zones on the evolution of magma-poor continental margins. We used teleseismic tomography to compute a relative P wave velocity model in eastern Yemen and southern Oman down to 400 km depth. Our model shows low-velocity anomalies located in the vicinities of five major fracture zones and regions of recent volcanism. These low-velocity anomalies are likely caused by localized asthenospheric upwelling and partial melting, caused by small-scale convection promoted by gradients in the lithosphere-asthenosphere boundary topography near the fracture zones. In addition, low velocities underlie regions of elevated topography between major sedimentary basins. We suggest that locally buoyant mantle creates uplift and dynamic topography on the rift margin that affects the course of seasonal rivers and the sedimentation at the mouth of those rivers. Our new P wave velocity model suggests that the dynamic topography and recent volcanism in the central and eastern Gulf of Aden could be due to small-scale convection at the edge of the Arabian plate and/or in the vicinity of fracture zones.

AB - We image the lithospheric and upper asthenospheric structure beneath the central and eastern parts of the northern Gulf of Aden rifted passive continental margin with 59 broadband stations to evaluate the role of transform fault zones on the evolution of magma-poor continental margins. We used teleseismic tomography to compute a relative P wave velocity model in eastern Yemen and southern Oman down to 400 km depth. Our model shows low-velocity anomalies located in the vicinities of five major fracture zones and regions of recent volcanism. These low-velocity anomalies are likely caused by localized asthenospheric upwelling and partial melting, caused by small-scale convection promoted by gradients in the lithosphere-asthenosphere boundary topography near the fracture zones. In addition, low velocities underlie regions of elevated topography between major sedimentary basins. We suggest that locally buoyant mantle creates uplift and dynamic topography on the rift margin that affects the course of seasonal rivers and the sedimentation at the mouth of those rivers. Our new P wave velocity model suggests that the dynamic topography and recent volcanism in the central and eastern Gulf of Aden could be due to small-scale convection at the edge of the Arabian plate and/or in the vicinity of fracture zones.

UR - http://www.scopus.com/inward/record.url?scp=84947752570&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84947752570&partnerID=8YFLogxK

U2 - 10.1130/GES01159.1

DO - 10.1130/GES01159.1

M3 - Article

AN - SCOPUS:84947752570

VL - 11

SP - 1262

EP - 1278

JO - Geosphere

JF - Geosphere

SN - 1553-040X

IS - 5

ER -