Anomalies altimetriques de la zone afro-arabe

Translated title of the contribution: Altimetric anomalies in the Afro-Arab zone

Bernard Collet, Hind Taud, Jean François Parrot

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The formation of the Afro-Arabian swell, including the Ethiopian and Yemeni plateau may be linked either to the flexural response due to the Red Sea-Gulf of Aden rifting or to the activity of the Afar plume. A Digital Elevation Model (DEM) of the whole region has been used, in an attempt to determine the role of either alternative. Once the boundaries of the blocks have been defined, the treatment applied to this DEM aims to lower the shoulders of the rifts, considering that they are similar to the co-seismic deformations linked to a normal fault system. Calculated altitudes provided by several topographic cross-sections have been taken into account in their computation. After reassembling of the three blocks, one notices the existence of numerous residual reliefs showing an asymmetrical repartition. The highest elevations are not centred on the triple junction zone, but are located on one hand in an ensemble including the Ethiopian and Yemeni plateau, and on the other hand, farther north on the western border of the Arabian block. According to the hypothesis of a mantellic plume linked to a hotspot, it can be assumed that these elevations correspond to the hotspot track. Using pre-existing data, the first hotspot impingement beneath the Arabian platform, would have occurred during the Cretaceous, and would then be responsible for the emplacement of the powerful paleogene volcanic traps covering onto the Ethiopian plateau. It appears that the whole hotspot track corresponds to the remnant relief.

Original languageGerman
Pages (from-to)275-284
Number of pages10
JournalEclogae Geologicae Helvetiae
Volume92
Issue number3
StatePublished - 1 Dec 1999

Fingerprint

hot spot
anomaly
plateau
digital elevation model
relief
plume
triple junction
swell
Paleogene
normal fault
rifting
emplacement
cross section
Cretaceous

Keywords

  • 3D simulation
  • Afro-Arab swell
  • DEM
  • Ethiopian plateau
  • Mantel plume
  • Rifting
  • Thermal Doming

Cite this

Collet, B., Taud, H., & Parrot, J. F. (1999). Anomalies altimetriques de la zone afro-arabe. Eclogae Geologicae Helvetiae, 92(3), 275-284.
Collet, Bernard ; Taud, Hind ; Parrot, Jean François. / Anomalies altimetriques de la zone afro-arabe. In: Eclogae Geologicae Helvetiae. 1999 ; Vol. 92, No. 3. pp. 275-284.
@article{7cb8c21167be4c9295fab32f05c482b9,
title = "Anomalies altimetriques de la zone afro-arabe",
abstract = "The formation of the Afro-Arabian swell, including the Ethiopian and Yemeni plateau may be linked either to the flexural response due to the Red Sea-Gulf of Aden rifting or to the activity of the Afar plume. A Digital Elevation Model (DEM) of the whole region has been used, in an attempt to determine the role of either alternative. Once the boundaries of the blocks have been defined, the treatment applied to this DEM aims to lower the shoulders of the rifts, considering that they are similar to the co-seismic deformations linked to a normal fault system. Calculated altitudes provided by several topographic cross-sections have been taken into account in their computation. After reassembling of the three blocks, one notices the existence of numerous residual reliefs showing an asymmetrical repartition. The highest elevations are not centred on the triple junction zone, but are located on one hand in an ensemble including the Ethiopian and Yemeni plateau, and on the other hand, farther north on the western border of the Arabian block. According to the hypothesis of a mantellic plume linked to a hotspot, it can be assumed that these elevations correspond to the hotspot track. Using pre-existing data, the first hotspot impingement beneath the Arabian platform, would have occurred during the Cretaceous, and would then be responsible for the emplacement of the powerful paleogene volcanic traps covering onto the Ethiopian plateau. It appears that the whole hotspot track corresponds to the remnant relief.",
keywords = "3D simulation, Afro-Arab swell, DEM, Ethiopian plateau, Mantel plume, Rifting, Thermal Doming",
author = "Bernard Collet and Hind Taud and Parrot, {Jean Fran{\cc}ois}",
year = "1999",
month = "12",
day = "1",
language = "Alem{\'a}n",
volume = "92",
pages = "275--284",
journal = "Eclogae Geologicae Helvetiae",
issn = "0012-9402",
publisher = "Geologischen Gesellschaft",
number = "3",

}

Collet, B, Taud, H & Parrot, JF 1999, 'Anomalies altimetriques de la zone afro-arabe', Eclogae Geologicae Helvetiae, vol. 92, no. 3, pp. 275-284.

Anomalies altimetriques de la zone afro-arabe. / Collet, Bernard; Taud, Hind; Parrot, Jean François.

In: Eclogae Geologicae Helvetiae, Vol. 92, No. 3, 01.12.1999, p. 275-284.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Anomalies altimetriques de la zone afro-arabe

AU - Collet, Bernard

AU - Taud, Hind

AU - Parrot, Jean François

PY - 1999/12/1

Y1 - 1999/12/1

N2 - The formation of the Afro-Arabian swell, including the Ethiopian and Yemeni plateau may be linked either to the flexural response due to the Red Sea-Gulf of Aden rifting or to the activity of the Afar plume. A Digital Elevation Model (DEM) of the whole region has been used, in an attempt to determine the role of either alternative. Once the boundaries of the blocks have been defined, the treatment applied to this DEM aims to lower the shoulders of the rifts, considering that they are similar to the co-seismic deformations linked to a normal fault system. Calculated altitudes provided by several topographic cross-sections have been taken into account in their computation. After reassembling of the three blocks, one notices the existence of numerous residual reliefs showing an asymmetrical repartition. The highest elevations are not centred on the triple junction zone, but are located on one hand in an ensemble including the Ethiopian and Yemeni plateau, and on the other hand, farther north on the western border of the Arabian block. According to the hypothesis of a mantellic plume linked to a hotspot, it can be assumed that these elevations correspond to the hotspot track. Using pre-existing data, the first hotspot impingement beneath the Arabian platform, would have occurred during the Cretaceous, and would then be responsible for the emplacement of the powerful paleogene volcanic traps covering onto the Ethiopian plateau. It appears that the whole hotspot track corresponds to the remnant relief.

AB - The formation of the Afro-Arabian swell, including the Ethiopian and Yemeni plateau may be linked either to the flexural response due to the Red Sea-Gulf of Aden rifting or to the activity of the Afar plume. A Digital Elevation Model (DEM) of the whole region has been used, in an attempt to determine the role of either alternative. Once the boundaries of the blocks have been defined, the treatment applied to this DEM aims to lower the shoulders of the rifts, considering that they are similar to the co-seismic deformations linked to a normal fault system. Calculated altitudes provided by several topographic cross-sections have been taken into account in their computation. After reassembling of the three blocks, one notices the existence of numerous residual reliefs showing an asymmetrical repartition. The highest elevations are not centred on the triple junction zone, but are located on one hand in an ensemble including the Ethiopian and Yemeni plateau, and on the other hand, farther north on the western border of the Arabian block. According to the hypothesis of a mantellic plume linked to a hotspot, it can be assumed that these elevations correspond to the hotspot track. Using pre-existing data, the first hotspot impingement beneath the Arabian platform, would have occurred during the Cretaceous, and would then be responsible for the emplacement of the powerful paleogene volcanic traps covering onto the Ethiopian plateau. It appears that the whole hotspot track corresponds to the remnant relief.

KW - 3D simulation

KW - Afro-Arab swell

KW - DEM

KW - Ethiopian plateau

KW - Mantel plume

KW - Rifting

KW - Thermal Doming

UR - http://www.scopus.com/inward/record.url?scp=0033491151&partnerID=8YFLogxK

M3 - Artículo

AN - SCOPUS:0033491151

VL - 92

SP - 275

EP - 284

JO - Eclogae Geologicae Helvetiae

JF - Eclogae Geologicae Helvetiae

SN - 0012-9402

IS - 3

ER -