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Geology of the Red Sea transitional region (22 degree N-25 degree N)
Bonatti, E.; Colantoni, P.; Della Vedova, B.; Taviani, M. (1984). Geology of the Red Sea transitional region (22 degree N-25 degree N). Oceanol. Acta 7(4): 385-398
In: Oceanologica Acta. Elsevier/Gauthier-Villars: Montreuil. ISSN 0399-1784, more
Peer reviewed article  

Available in Authors 

Keywords
    Basalts; Bottom topography; Fracture zones; Geology; Heat flow; Hydrothermal activity; Measurement; Oceanic crust; Rift zones; Seafloor spreading; Seismic reflection profiles; Tectonics; ISW, Red Sea [Marine Regions]; Marine

Authors  Top 
  • Bonatti, E.
  • Colantoni, P.
  • Della Vedova, B.
  • Taviani, M.

Abstract
    The Red Sea between 22 degree N and 25 degree N is transitional between the southern Red Sea, where an axial rift valley with strong magnetic signature is almost continuous, and the Northern Red Sea where the axial valley and associated magnetic anomalies are absent. The Nereus trough has an axial rift valley morphology and is carpeted by basalts, indicating emplacement of oceanic type crust; magnetic anomalies suggest sea floor spreading initiated about 2-3 m.y.b.p. at the Nereus segment. Heat flow within the Nereus trough ranges from very high to very low, indicating sub-sea floor hydrothermal convective circulation, confirmed by the presence of brine pools and of metalliferous deposits. A basaltic seamount protruding through the sediments at the axis of the Bannock Deep, a subdued axial graben to the north of Nereus, may indicate punctiform initiation of another oceanic segment. The orientation of the Red Sea axis changes by about 50 degree at the Transitional Region, which is crossed by a fracture zone (Zabargad Fracture Zone) parallel to the Dead Sea fault and probably inherited from a pre-Red Sea lineament.

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