Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/108997
Title: Sedimentary evolution of an Aptian syn-rift carbonate system (Maestrat Basin, E Spain): effects of accommodation and environmental change
Author: Bover-Arnal, Telm
Moreno-Bedmar, Josep Anton
Salas, Ramon (Salas Roig)
Skelton, P.W.
Bitzer, Klaus
Gili, E.
Keywords: Estratigrafia seqüencial
Aptià
Serralada Ibèrica
Sequence stratigraphy
Aptian
Iberian Mountains
Issue Date: 2010
Publisher: (UB). (ICTJA). (IDEA). (UAB). (CSIC)
Abstract: We report an integrated study of an expanded and relatively complete syn-rift continental to epeiric marine succession of Aptian age, cropping out in the western Maestrat Basin (eastern Iberian Chain). Four transgressiveregressive sequences are recognized throughout this mixed carbonate-siliciclastic succession, with excellent age control provided by ammonite biostratigraphic data. The transgressive systems tracts consist mainly of alternations of marls and limestones rich in orbitolinids. The regressive systems tracts are essentially characterized by wave- and tidally influenced siliciclastic and carbonate deposits, and by the development of carbonate platforms with rudists, corals, orbitolinids and green algae. Carbon and oxygen isotope curves were established in order to identify the global d13C perturbations related to the Early Aptian Oceanic Anoxic Event (OAE1a). These perturbations commence with a horizon of coral rubble encrusted by Lithocodium aggregatum and Bacinella irregularis with widespread large-sized discoidal Palorbitolina lenticularis. Associated d18O values indicate high-frequency cooling-warming climatic cycles. The fault-controlled rapid syn-rift subsidence recorded during this stage was the most important factor in producing accommodation. However, the major transgressions, sea level falls and biotic changes recorded in the eastern Iberian Chain are in agreement with those registered in other contemporaneous basins of the Tethys. Thus, the resulting sedimentary succession faithfully reflects the major oceanographic and climatically-driven global changes that characterized this stage albeit within a context established by regional tectonics. Hence, this well-documented record of the evolution of an Aptian epicontinental sea provides a useful comparative case study for the analysis of other Aptian epeiric sedimentary successions.
Note: Reproducció del document publicat a: https://doi.org/10.1344/105.000001533
It is part of: Geologica Acta, 2010, vol. 8, num. 3, p. 249-280
Related resource: https://doi.org/10.1344/105.000001533
URI: http://hdl.handle.net/2445/108997
ISSN: 1695-6133
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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