LITHO-STRUCTURAL AND PALEOGEOGRAPHIC ANALYZES OF THE SEDIMENTARY FORMATIONS OF THE SAKOA SERIES OF THE KARROO SYSTEM IN THE MORONDAVA BASIN

sedimentary geology

Various geological, geophysical studies and investigatings and as well as drilling in the Karroo sedimentary bed, particulary in the Sakoa series have been carried out for a century in the pits in the southern part of the Morondava basin.By geological analogy, the Mozambican sedimentary coast is formed with the same tectono-paleogeographic conditions and lithologic composition of the Malagasy sedimentary deposits.To this end, our study based on the analyzes of the formations, linked with different tectono-stratigraphic and structural or tectonic diformations, while taking into account of their lithologic compositions and their stratigraphies and especially their paléogéographic conditions during the accumulation of the deposits, the dating of formations, the presence of the organic, microbiological and biochemical substances and the possibility of the petroleum systems, can batter justify better and support the distribution of the structural areas and formations susceptile to oil and gas deposits or traps. The method known as" litho-structural and paléogéographic analyzesof the formations" is used above all during regional investigations; they make it possible to better to orient the detailed exploration work and to identify horizontally and in vertically all the formations or sub-formations in the tectono-stratigraphic and structural or in well defined structural zones.

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