Forebulge migration in the foreland basin system of the central‐southern Apennine fold‐thrust belt (Italy): New high‐resolution Sr‐isotope dating constraints
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| Titel: | Forebulge migration in the foreland basin system of the central‐southern Apennine fold‐thrust belt (Italy): New high‐resolution Sr‐isotope dating constraints |
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| Autoren: | Lorenzo Consorti, Amerigo Corradetti, Stefano Vitale, Stefano Tavani, Kei Ogata, Anna Cipriani, Monia Sabbatino, Mariano Parente, Ilenia Arienzo |
| Weitere Verfasser: | Sabbatino, M., Tavani, S., Vitale, S., Ogata, K., Corradetti, A., Consorti, L., Arienzo, I., Cipriani, A., Parente, M. |
| Quelle: | Basin Research. 33:2817-2836 |
| Verlagsinformationen: | Wiley, 2021. |
| Publikationsjahr: | 2021 |
| Schlagwörter: | central-southern Apennines (Italy), fold-thrust belt, forebulge, foredeep, foreland basin system, strontium isotope stratigraphy, 01 natural sciences, 0105 earth and related environmental sciences |
| Beschreibung: | The Apennines are a retreating collisional belt where the foreland basin system, across large domains, is floored by a subaerial forebulge unconformity developed due to forebulge uplift and erosion. This unconformity is overlain by a diachronous sequence of three lithostratigraphic units made of (a) shallow‐water carbonates, (b) hemipelagic marls and shales and (c) siliciclastic turbidites. Typically, the latter two have been interpreted regionally as the onset of syn‐orogenic deposition in the foredeep depozone, whereas little attention has been given to the underlying unit. Accordingly, the rate of migration of the central‐southern Apennine fold‐thrust belt‐foreland basin system has been constrained, so far, exclusively considering the age of the hemipelagites and turbidites, which largely post‐date the onset of foredeep depozone. In this work, we provide new high‐resolution ages obtained by strontium isotope stratigraphy applied to calcitic bivalve shells sampled at the base of the first syn‐orogenic deposits overlying the Eocene‐Cretaceous pre‐orogenic substratum. Integration of our results with published data indicates progressive rejuvenation of the strata sealing the forebulge unconformity towards the outer portions of the fold‐thrust belt. In particular, the age of the forebulge unconformity linearly scales with the pre‐orogenic position of the analysed sites, pointing to an overall constant migration velocity of the forebulge wave in the last 25 Myr. |
| Publikationsart: | Article |
| Dateibeschreibung: | STAMPA; application/pdf |
| Sprache: | English |
| ISSN: | 1365-2117 0950-091X |
| DOI: | 10.1111/bre.12587 |
| Zugangs-URL: | https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/bre.12587 http://hdl.handle.net/11588/856736 https://www.sciencedirect.com/science/article/pii/S0031018220305538?via=ihub http://hdl.handle.net/11368/3010279 https://onlinelibrary.wiley.com/doi/10.1111/bre.12587 https://ui.adsabs.harvard.edu/abs/2021BasR...33.2817S/abstract https://www.iris.unina.it/handle/11588/856736 https://onlinelibrary.wiley.com/doi/10.1111/bre.12587 https://hdl.handle.net/20.500.14243/519363 https://doi.org/10.1111/bre.12587 https://onlinelibrary.wiley.com/doi/10.1111/bre.12587 https://hdl.handle.net/11368/3010279 https://doi.org/10.1111/bre.12587 https://hdl.handle.net/11380/1268807 https://doi.org/10.1111/bre.12587 https://hdl.handle.net/11567/1216795 https://doi.org/10.1111/bre.12587 https://www.sciencedirect.com/science/article/pii/S0031018220305538?via=ihub https://doi.org/10.1111/bre.12587 https://hdl.handle.net/11588/856736 |
| Rights: | CC BY CC BY NC ND |
| Dokumentencode: | edsair.doi.dedup.....633b49207b06ec96fdfcb8b00ba13e13 |
| Datenbank: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | The Apennines are a retreating collisional belt where the foreland basin system, across large domains, is floored by a subaerial forebulge unconformity developed due to forebulge uplift and erosion. This unconformity is overlain by a diachronous sequence of three lithostratigraphic units made of (a) shallow‐water carbonates, (b) hemipelagic marls and shales and (c) siliciclastic turbidites. Typically, the latter two have been interpreted regionally as the onset of syn‐orogenic deposition in the foredeep depozone, whereas little attention has been given to the underlying unit. Accordingly, the rate of migration of the central‐southern Apennine fold‐thrust belt‐foreland basin system has been constrained, so far, exclusively considering the age of the hemipelagites and turbidites, which largely post‐date the onset of foredeep depozone. In this work, we provide new high‐resolution ages obtained by strontium isotope stratigraphy applied to calcitic bivalve shells sampled at the base of the first syn‐orogenic deposits overlying the Eocene‐Cretaceous pre‐orogenic substratum. Integration of our results with published data indicates progressive rejuvenation of the strata sealing the forebulge unconformity towards the outer portions of the fold‐thrust belt. In particular, the age of the forebulge unconformity linearly scales with the pre‐orogenic position of the analysed sites, pointing to an overall constant migration velocity of the forebulge wave in the last 25 Myr. |
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| ISSN: | 13652117 0950091X |
| DOI: | 10.1111/bre.12587 |