Geophysical Journal | 2008 volume 30 2

Methods of density modeling of tectonosphere of transition zones ocean-continent of the displacement type by the example of the Guinean marginal plateau

© M.V. Kozlenko, Yu.V. Kozlenko

Results of interpretation of anomalies of gravity force field of the Guinean marginal plateau along the meridian 160 w. l. based on the proposed method of tectonosphere modeling of transitional zones ocean - continent of displacement type. It has been proved that in case of gravity modeling of continental margins of such a type both oceanic and continental cores can be used as reference cores of reduction with compensation at the depth of 180 km, i. e. at the surface of asthenosphere in mature oceanic depression. Selected density model revealed: highly disjoint character of the surface of crystalline basement under the southern flanc of the plateau, the presence of transcrustal faults, which form blocky structure within oceanic part of the plateau, showed considerable density differentiation within the upper mantle.

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