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RMZ – MATERIALI IN GEOOKOLJE

RMZ – MATERIALI IN GEOOKOLJE

RMZ – MATERIALI IN GEOOKOLJE

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416 Adewale, A., Olawale, O. O., Martins, O. M.Figure 1. Location map of the study area showing sampling and VES points.The basin is bounded in the west by theGhana Ridge which is presumably anoffset extension of the Romanche FractureZone while the Benin hinge line, abasement escarpment which separatesthe Okitipupa Structure from the NigerDelta basin and a continental extensionof the Chain Fracture, bounds it in theeast (Figure 2). The onshore part of thebasin covers a broad arc-shaped profileof about 600 km 2 in extent and attainsa maximum width, along its N-S axis,some 130 km around the Nigerian –Republic of Benin border. The basinnarrows to about 50 km on the easternside where the basement assumes aconvex upwards outline with concomitantthinning of sediments. Along thenortheastern fringe of the basin whereit rims the Okitipupa high is a band oftar (oil) sands and bitumen seepages(Nwachukwu & Ekweozor, 1989).<strong>RMZ</strong>-M&G 2012, 59

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