LITHO-STRUCTURAL AND PALEOGEOGRAPHIC ANALYSIS OF THE SEDIMENTARY FORMATIONS THE SAKAMENA SERIES OF THE KARROO SYSTEM IN MORONDAVA AND MAJUNGA-DIEGO BASINS

sedimentary geology

The Sakamena series is composed of conglomerates, of deltaic continental sandstone of dating, Upper Permian and continental sandstones and marine marls of Lower Triassic dating. Apparently; it represents good prospects in petroleum systems, especially in the deep marine sedimentary part, onshore or offshore. To this end, our reseach based on the analyzes of the formations (lithological sequence, facies), linked with different structures or tectonic deformations, while taking into account their lithological compositions and their stratigraphies and especially of their paléogéographic conditions during accumulation of the deposits, the dating of formations, of the presence of the organic, microbiological and biochemical substances and the possibility of petroleum systems, can better justify and support the distribution of the structural areas and formations susceptible to deposits or oil traps and some gas. The method known as" litho-structural and paléogéographic analyzes of formations" is a recent method, developed in the field of oil and gas prospecting, particularly in Russia. It is used above all during regional investigations and allows better orientation of the detailed work, it consists of clearing horizontally and vertically all formations or sub-formations accumulated in the structural geological elements or well defined structural.

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