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  • GEOCHEMICAL STUDY OF BEMOLANGA TAR SAND AND TSIMIRORO HEAVY OIL DEPOSIT IN THE WEST SEDIMENTARY BASIN OF MADAGASCAR.
    Madamines, volume 3, juillet 2016, ISSN 2220-0681

    Auteurs : Simon Rakotoarison, Roger Randrianja, Eddy H. Rasolomanana

    Keywords : heavy oil, oil generation, geochemical, hydrocarbons, tar sands, migration, sedimentary basins, Karroo, geochemical.

    BEMOLANGA (BML) tar sand and TSIMIRORO (TSM) heavy oil have been subjected to various geochemical studies during the past years. These geochemical data have largely contributed to deeper knowledge of the oil generation in Madagascar sedimentary basins. In fact, oil prone source rocks have been identified along with their maturity level of lower Cretaceous, middle Jurassic and Triassic age. Madagascar tar sands and heavy oil are biodegraded and oil was generated by source rocks of probably terrestrial derived organic matter (type III). Moreover, recorded geochemical data are of great importance for the better understanding of oil generation, differential migration as well as hydrocarbons characteristics which are necessary for the future exploration research works within the Madagascar sedimentary basins. Nevertheless geochemical studies on the tar sands and heavy oil have to be performed in detail for better optimization and rationalization of further exploration works to be carried out in the overall sedimentary basin in general and in the Karroo (Permo Triassic) formation in particular.

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