This work illustrates the evolution the Lower Jurassic shallow-water carbonates known as the Calcare Massiccio Formation in the Central Apennines (Italy). The Calcare Massiccio is characterized by lateral and vertical variability in the facies associations, related to an articulated physiography of the Triassic to Lower Jurassic carbonate platform and to its tectonic evolution. This work documents the depositional environment changes during the platform evolution. Quantitative analysis on samples collected from three stratigraphic sections were performed through the Calcare Massiccio succession allowed up to the overlying Pliensbachian pelagites. Two type of carbonate sedimentation have been recognized: in the peritidal and shallow subtidal environments (Calcare Massiccio A) the carbonate production is dominated by microbial activity, while the carbonate sedimentation in a deeper environment of middle to outer ramp (Calcare Massiccio B), is dominated by a bioclastic sedimentation. The evolution from the Calcare Massiccio A to the B can be interpreted as the product of increase of accommodation that in turn produced a backstepping of carbonate facies belt, the photic microbial dominated peritidal facies developed on the persistent Latium-Abruzzi Platform while the bioclastic carbonate production factory settled on the structural highs resulting from the dismembering of the platform by syn-sedimentary tectonic. The bioclastic carbonate factory was not efficient in filling the available accommodation space produced by Sinemurian extensional tectonic. This inefficiency was amplified by the restricted area available for this factory in the small structural highs. These conditions were sufficient to predispose the platform to the drowning without invoke change in the trophic resource or change in the palaeoceanography.

Frequency analysis across the drowning of a Lower Jurassic carbonate platform. The Calcare Massiccio Formation (Apennines, Italy) / Corda, Laura; Tomassetti, Laura; Tagliavento, Mattia; Brandano, Marco. - In: MARINE AND PETROLEUM GEOLOGY. - ISSN 0264-8172. - ELETTRONICO. - 78:(2016), pp. 606-620. [10.1016/j.marpetgeo.2016.09.013]

Frequency analysis across the drowning of a Lower Jurassic carbonate platform. The Calcare Massiccio Formation (Apennines, Italy)

CORDA, Laura;TOMASSETTI, LAURA;TAGLIAVENTO, MATTIA;BRANDANO, Marco
2016

Abstract

This work illustrates the evolution the Lower Jurassic shallow-water carbonates known as the Calcare Massiccio Formation in the Central Apennines (Italy). The Calcare Massiccio is characterized by lateral and vertical variability in the facies associations, related to an articulated physiography of the Triassic to Lower Jurassic carbonate platform and to its tectonic evolution. This work documents the depositional environment changes during the platform evolution. Quantitative analysis on samples collected from three stratigraphic sections were performed through the Calcare Massiccio succession allowed up to the overlying Pliensbachian pelagites. Two type of carbonate sedimentation have been recognized: in the peritidal and shallow subtidal environments (Calcare Massiccio A) the carbonate production is dominated by microbial activity, while the carbonate sedimentation in a deeper environment of middle to outer ramp (Calcare Massiccio B), is dominated by a bioclastic sedimentation. The evolution from the Calcare Massiccio A to the B can be interpreted as the product of increase of accommodation that in turn produced a backstepping of carbonate facies belt, the photic microbial dominated peritidal facies developed on the persistent Latium-Abruzzi Platform while the bioclastic carbonate production factory settled on the structural highs resulting from the dismembering of the platform by syn-sedimentary tectonic. The bioclastic carbonate factory was not efficient in filling the available accommodation space produced by Sinemurian extensional tectonic. This inefficiency was amplified by the restricted area available for this factory in the small structural highs. These conditions were sufficient to predispose the platform to the drowning without invoke change in the trophic resource or change in the palaeoceanography.
2016
carbonate factory; Central Apennines; drowning platform; Lower Jurassic; quantitative analysis; oceanography; geophysics; geology; economic geology; stratigraphy
01 Pubblicazione su rivista::01a Articolo in rivista
Frequency analysis across the drowning of a Lower Jurassic carbonate platform. The Calcare Massiccio Formation (Apennines, Italy) / Corda, Laura; Tomassetti, Laura; Tagliavento, Mattia; Brandano, Marco. - In: MARINE AND PETROLEUM GEOLOGY. - ISSN 0264-8172. - ELETTRONICO. - 78:(2016), pp. 606-620. [10.1016/j.marpetgeo.2016.09.013]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/926178
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