Our research is aimed at estimating the vertical deformation affecting late Quaternary units accumulated into the foreland basin of the Northern Apennines chain. Beneath the study alluvial plain, compressive fault-fold structures are seismically active. We reconstructed the stratigraphic architecture and the depositional evolution of the alluvial deposits, which accumulated in the first 40 m of subsurface, through the last 45,000 years, from before the Last Glacial Maximum to the present. A 58 km-long stratigraphic profile was correlated from the foothill belt near Bologna to the vicinity of the Po River. The analysis of the profile documents subsidence movements through the last 12,000 years, exceeding − 18 m in syncline areas, with subsidence rates of at least 1.5 m/ka. Anticlines areas experienced a much lower subsidence than the syncline ones.
Il lavoro indaga l’evoluzione deposizionale degli ultimi 45.000 anni, registrata dai sedimenti di pianura alluvionale sepolti nei primi 40 m di sottosuolo, fra Bologna e Ferrara. La stratigrafia di questi sedimenti è stata indagata attraverso la ricostruzione di un profilo continuo lungo 58 km, dal piede dell’Appennino all’area urbana di Ferrara. Negli ultimi 18.000 anni le zone di sinclinale sono state interessate da una subsidenza dell’ordine dei due metri per millennio, mentre le aree di sinclinale hanno registrato una subsidenza molto minore.
Regional deformation of late Quaternary fluvial sediments in the Apennines foreland basin (Emilia, Italy)
Stefani, Marco
Primo
Supervision
;
2018
Abstract
Our research is aimed at estimating the vertical deformation affecting late Quaternary units accumulated into the foreland basin of the Northern Apennines chain. Beneath the study alluvial plain, compressive fault-fold structures are seismically active. We reconstructed the stratigraphic architecture and the depositional evolution of the alluvial deposits, which accumulated in the first 40 m of subsurface, through the last 45,000 years, from before the Last Glacial Maximum to the present. A 58 km-long stratigraphic profile was correlated from the foothill belt near Bologna to the vicinity of the Po River. The analysis of the profile documents subsidence movements through the last 12,000 years, exceeding − 18 m in syncline areas, with subsidence rates of at least 1.5 m/ka. Anticlines areas experienced a much lower subsidence than the syncline ones.File | Dimensione | Formato | |
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Stefani et al 2018_IntJournEarthSc_Emilia-deformations.pdf
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