Facies architecture of the late Early-Middle Aptian carbonate platform in the wester Maestrad basin Eastern Iberian Chain)

• Autores: T. Bover Arnal, Josep Anton Moreno Bedmar, Ramón Salas Roig, K. Bitzer
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 10, 2008 (Ejemplar dedicado a: VII Congreso Geológico de España), págs. 115-118
• Idioma: español
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• Resumen

  • A detailed study of the late Early-Middle Aptian carbonate platforms in the western Galve subbasin (Maestrat basin, E Iberian Chain; E Spain) was made to identify the basic accretional unit. This basic building block corresponds to a high-order depositional sequence bounded by maximum regressive surfaces, and develops at three different sea-level stages: early transgressive, late transgressive and regressive. During these sea-level eustatic fluctuations, deposition of six different lithofacies assemblages occurs along four specific sedimentary environments: platform, platform margin, slope and basin. The early transgressive pulse is represented by an orbitoline-rich level linked to the seawater eutrophication. The late transgressive pulse is characterized by a building-up episode dominated by rudists, corals, orbitolines and ammonites. The increase in hydrodynamic energy-conditions, associated with the subsequent regression, resulted in debris flow deposition. The carbonate platform studied is interpreted as a flat topped non rimmed shelf.