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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of the crustal structure of the transform continental margin off Ghana, northern Gulf of Guinea (1997)
    Springer
    Geo-marine letters 17 (1997), S. 12-20 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Results of a detailed geophysical transect across the transform continental margin off Ghana, at the eastern end of the Romanche Fracture Zone in the Equatorial Atlantic, are presented. Seismic refraction, single-channel seismic reflection, gravity, and magnetic data were collected, and seismic, gravity, and magnetic models along the transect are shown. The 6- to 11-km-wide ocean–continent transition (OCT) is characterized by a high-velocity, high-density, high-magnetization crustal zone. The models show no evidence for any underplating of the continental crust adjacent to the margin but minor melting and intrusion of the continental crust may have occurred in the vicinity of the OCT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00007202
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    Paper (German National Licenses)
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  • 2
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    Dalrymple Trough: an active oblique-slip ocean-continent boundary in the northwest Indian Ocean (2008)
    Elsevier
    In:  Earth and Planetary Science Letters, 272 . pp. 437-445.
    Details
    Publication Date: 2019-09-23
    Description: The Dalrymple Trough marks part of the transform plate boundary between India and Arabia in the northern Arabian Sea. Oblique extension is presently active across this portion of the boundary at a rate of a few millimetres per year, and seismic reflection profiles across the trough confirm that it is an extensional structure. We present new swath bathymetric and wide-angle seismic data from the trough. The bathymetric data show that the trough is bounded by a single, steep, 3-km-high scarp to the southeast and a series of smaller, en-echelon scarps to the northwest. Wide-angle seismic data show that a typical oceanic crustal velocity structure is present to the northwest, with a crustal thickness of ~ 6 km. There is an abrupt change in crustal thickness and velocity structure at the northwestern edge of the trough, and the trough itself is underlain by 12-km-thick crust interpreted as thinned continental crust. Therefore we infer that Dalrymple Trough is an unusual obliquely extending plate boundary at which continental crust and oceanic crust are juxtaposed. The extensional deformation is focused on a single major fault in the continental lithosphere, but distributed over a region ~ 60 km wide in the oceanic lithosphere
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.epsl.2008.05.007
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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