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Roncioni, Adriano
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- PublicationOpen AccessNew Chronological Constraints from Hypogean Deposits for Late Pliocene to Recent Morphotectonic History of the Alpi Apuane (NW Tuscany, Italy)(2021)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Abstract: A sedimentary sequence of fluvial deposits preserved in the Corchia Cave (Alpi Apuane) provides new chronological constraints for the evolution of the cave system and the timing and rate of uplift of this sector of the Alpi Apuane since the late Pliocene. Supported by magnetostratigraphic analysis performed on fine-grained fluvial deposits, and by radiometric dating of speleothems, we suggest that the deposition of fluvial sediments occurred between ~1.6–1.2 Ma. This implies that the host volume of rock was already located close to the local base level, adding key information about the recent tectonic evolution of the Alpi Apuane. A few before ~1 Ma, an erosive phase occurred due to the base-level lowering, followed by continuous speleothem deposition since at least 0.97 Ma. From that time, Monte Corchia uplifted at a maximum rate of ~0.5 mm/year, which is consistent with isostatic uplift mainly driven by erosional unloading. The petrographical study of the fluvial deposits highlights the presence of material derived from the erosion of rocks that today are absent in the cave’s catchment area, suggesting a different surface morphology during the Early Pleistocene. This study highlights the potential of cave sediments as archives for reconstructing the uplift history of mountain ranges.221 27 - PublicationRestrictedThe environmental features of the Monte Corchia cave system (Apuan Alps, Central Italy)(2008-10)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Piccini, L.; Dipartimento di Scienze della Terra, University of Firenze, Firenze, Italy ;Zanchetta, G.; Dipartimento di Scienze della Terra, University of Pisa, Pisa, Italy; Istituto di Geoscienze e Georisorse, Area della Ricerca CNR di Pisa, Pisa, Italy ;Drysdale, R. N.; School of Environmental and Life Sciences, University of Newcastle, Callaghan, Australia ;Hellstrom, J.; School of Earth Sciences, University of Melbourne, Parkville, Australia ;Isola, I.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Fallick, A. E.; Scottish Universities Environmental Research Centre, East Kilbride, Scotland ;Leone, G.; Dipartimento dell’Uomo e dell’Ambiente, University of Pisa, Pisa, Italy ;Doveri, M.; Istituto di Geoscienze e Georisorse, Area della Ricerca CNR di Pisa, Pisa, Italy ;Mussi, M.; Istituto di Geoscienze e Georisorse, Area della Ricerca CNR di Pisa, Pisa, Italy ;Mantelli, F.; Agenzia Regionale per la protezione Ambientale della Toscana (ARPAT) – Dipartimento Provinciale di Firenze ;Molli, G.; Dipartimento di Scienze della Terra, University of Pisa, Pisa, Italy ;Lotti, L.; Agenzia Regionale per la protezione Ambientale della Toscana (ARPAT) – Dipartimento Provinciale di Massa ;Roncioni, A.; Gruppo Speleologico Lucchese, Lucca Italy ;Regattieri, E.; Gruppo Speleologico Lucchese, Lucca Italy ;Meccheri, M.; Dipartimento di Scienze della Terra, University of Siena, Siena, Italy ;Vaselli, L.; Istituto di Geoscienze e Georisorse, UO Pisa, Pisa, Italy; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The Monte Corchia cave system, one of the most famous and popular caves in Italy, has in recent times been the subject of investigation on its speleothems as paleoclimate archives. This paper describes the geology, geomorphology and water chemistry of the cave system with the aim to elucidate the processes that have generated these speleothems and the properties they contain that are so useful for paleoclimatology. Some general conclusions can be drawn: i) the Corchia system is a cave developed over different altitudes during progressive uplift of the mountain chain in which it is located, probably under drainage conditions very different to those of the present. This has allowed the development of a large (ca. 60 km) and deep (-1187 m) karst system; ii) the dewatering phases have left the deepest chambers far away from clastic input and with long drip pathways; iii) the peculiar geological context has permitted the water to intercept and dissolve a significant source of U (still unknown) that facilitates radiometric dating; iv) in the last 1 Ma at least, no significant changes have occurred in the relief and in the epikarst, in the sense that speleothems have grown under very similar conditions. In addition the extremely low Ca concentration of drip waters have permitted low speleothem growth rates and, at least for the “Galleria delle Stalattiti”, the zone under paleoclimate studies, a stable plumbing system (i.e. chemistry and stable isotopes of drip waters) has produced calcite close to isotopic equilibrium.219 28 - PublicationRestrictedA continuous stable isotope record from the penultimate glacial maximum to the Last Interglacial (159–121 ka) from Tana Che Urla Cave (Apuan Alps, central Italy)(2014)
; ; ; ; ; ; ;Regattieri, E.; DST Università di Pisa ;Zanchetta, G.; DST Università di Pisa ;Drysdale, R. N.; Department of Resource Management and Geography, University of Melbourne, Victoria 3010, Australia ;Isola, I.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Hellstrom, J. C.; School of Earth Sciences, University of Melbourne, Victoria 3010 Australia ;Roncioni, A.; Gruppo Speleologico Lucchese; ; ; ; ; Relatively few radiometrically dated records are available for the central Mediterranean spanning the marine oxygen isotope stage 6–5 (MIS 6–5) transition and the first part of the Last Interglacial. Two flowstone cores from Tana che Urla Cave (TCU, central Italy), constrained by 19 U/Th ages, preserve an interval of continuous speleothem deposition between ca. 159 and 121 ka. A multiproxy record (δ18O, δ13C, growth rate and petrographic changes) obtained fromthis flowstone preserves significant regional-scale hydrological changes through the glacial/interglacial transition and multi-centennial variability (interpreted as alternations between wetter and drier periods) within both glacial and interglacial stages. The glacial stage shows a wetter period between ca. 154 and 152 ka, while the early to middle Last Interglacial period shows several drying events at ca. 129, 126 and 122 ka, which can be placed in the wider context of climatic instability emerging from North Atlantic marine andNWEuropean terrestrial records. The TCU record also provides important insights into the evolution of local environmental conditions (i.e. soil development) in response to regional and global-scale climate events.164 17