Numerical modelling of Plio-Quaternary slope evolution based on geological constraints: a case study from the Caramanico Valley (Central Apennines, Italy)
| Autor: | Carlo Esposito, E. Di Luzio, Salvatore Martino, G. Bianchi Fasani, Gabriele Scarascia-Mugnozza |
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| Rok vydání: | 2011 |
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| Zdroj: | Geological Society, London, special publications (Online) Special Publications 351, ISBN: 978-1-86239-324-0. (2011): 201–214. doi:10.1144/SP351.11 info:cnr-pdr/source/autori:Bianchi Fasani G.*, Di Luzio E.**, Esposito C*, Martino S.*, Scarascia-Mugnozza G*./titolo:Numerical modelling of Plio-Quaternary slope evolution based on geological constraints: a case study from the Caramanico Valley (Central Apennines, Italy)./doi:10.1144%2FSP351.11/rivista:Geological Society, London, special publications (Online)/anno:2011/pagina_da:201/pagina_a:214/intervallo_pagine:201–214/volume:Special Publications 351, ISBN: 978-1-86239-324-0. |
| ISSN: | 2041-4927 0305-8719 |
| DOI: | 10.1144/sp351.11 |
| Popis: | Evidence of deep-seated gravitational slope deformations (DSGSD) and of large prehistoric landslides is fairly widespread within the Central Apennines (Italy). These gravity- induced processes accompanied the intense Plio-Quaternary uplift phases that affected the mountain chain. In this study a multidisciplinary approach has been adopted in order to better constrain the relationship between the tectonic evolution and the gravitational morphogenesis of a typical Apennine morphostructure, such as the Caramanico Valley. For this purpose a conceptual model of the morphostructural evolution of the area has been reconstructed, on the basis of geo- logical constraints derived by the integration of detailed geological- structural and geomorpholo- gical surveys with available literature data. Based on this evolutionary model, a multistage numerical modelling using the finite difference method code FLAC 6.0 has been performed in order to: (i) evaluate the effect of the uplift-related morphological changes of the valley-slope system; and (ii) assess the role of the horizontal/vertical stress ratio variations due to geodynamic regime shifts. The results of the numerical model show a good fit with the actual geomorphical evidence and also confirm the presence during some evolutionary stages of stress -strain conditions compatible with those necessary to produce the massive rock slope failures testified by the presence of large palaeo-landslide deposits. |
| Databáze: | OpenAIRE |
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