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Structure et volcanisme d'un rift sous-marin: Le fossé des Kérimbas (marge nord - Mozambique)
Mougenot, D.; Hernandez, J.; Virlogeux, P. (1989). Structure et volcanisme d'un rift sous-marin: Le fossé des Kérimbas (marge nord - Mozambique). Bull. Soc. Géol. Fr. 5(2): 401-410
In: Bulletin de la Société Géologique de France. Société Géologique de France: Paris. ISSN 0037-9409, more
Peer reviewed article  

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Keywords
    Continental margins; Rift zones; Seismic reflection; Volcanism; ISW, Mozambique [Marine Regions]; Marine

Authors  Top 
  • Mougenot, D.
  • Hernandez, J.
  • Virlogeux, P.

Abstract
    On the continental margin of the northern Mozambique, a flat-bottomed trough, the north-south trending Kerimbas deep graben, disrupts the continental slope alongside an alignment of seamounts forming the Davie Ridge. Water-gun seismic reflection lines, implemented throughout the region during MD40/MACAMO cruise, show that the graben, cut into Tertiary sediments, corresponds : eastward, to a former discontinuity several times reactivated and located above an abrupt uplift of the Moho; westward, to a Miocene tilting or a recent normal fault. On both sides and at its southern end, the graben supports alkaline basalts intrusive into Neogene sediments. The Kerimbas graben, seaward extension of the East African Rift, is currently propagating at both ends of the trough, as indicated by recent faults and rather intense seismicity.

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