Analyse quantitative des faciès carbonatés et cycles T–R de haute fréquence dans le Barrémien du Prébalkan central (Bulgarie) |
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Authors: | Viara Minkovska Bernard Peybernès Pierre Cugny Todor Nikolov |
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Affiliation: | 1. UMR–CNRS 5573, Stramipal, université Paul-Sabatier, 39, allées Jules-Guesde, 31062 Toulouse cedex 04, France;2. Géologie et Écologie quantitatives, université Paul-Sabatier, 118, route de Narbonne, 31062 Toulouse cedex 04, France;3. Institut géologique, Académie bulgare des sciences, 24, rue Acad. G.-Bonchev, 1113 Sofia, Bulgarie |
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Abstract: | Within the Emerici zone–Barremense zone biostratigraphic interval, the Barremian deposits of Central Fore-Balkan (Lovech–Veliko Tarnovo shelf) consist of a succession of several formations where alternate terrigenous argillaceous/sandy-dominated facies (Kormjansko Fm., Balgarene Fm.) and carbonate-dominated (‘Urgonian’) facies (Krushevo Fm., Emen Fm.). The qualitative and, particularly, quantitative facies analysis of the carbonate successions observed along 13 detailed cross-sections and in one drill hole show the stacking of about 40 fifth-order T–R cycles induced by numerous eustatic jerks contributing to the progressive settlement of this shelf. These high-frequency cycles of about 100 000 years must be regarded as valuable correlation tools for the subsurface hydrocarbon research. To cite this article: V. Minkovska et al., C. R. Geoscience 336 (2004). |
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Keywords: | analyse qualitative et quantitative des faciès Barrémien Prébalkan Bulgarie qualitative and quantitative facies analysis 5th-order cycles Barremian Fore-Balkan Bulgaria |
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