https://scholars.lib.ntu.edu.tw/handle/123456789/571623
標題: | Lifecycle of an intermontane plio-pleistocene fluvial valley of the northern apennines: From marine-driven incision to tectonic segmentation and infill | 作者: | Ghinassi M Aldinucci M Bianchi V Brogi A Capezzuoli E Yu T.-L CHUAN-CHOU SHEN |
關鍵字: | Fluvial sedimentology; Incised valley; Palaeodrainage; Southern Tuscany | 公開日期: | 2021 | 卷: | 11 | 期: | 3 | 來源出版物: | Geosciences (Switzerland) | 摘要: | Downcutting and infill of incised valley systems is mostly controlled by relative sea-level changes, and studies on valley-fill successions accumulated independently from relative sea-level or lake-level oscillations are limited. This study focuses on the Plio-Pleistocene evolution of a fluvial drainage system developed in Southern Tuscany (Italy) following a regional marine forced regression at the end of Piacentian. Subsequent in-valley aggradation was not influenced by any relative sea-level rise, and valley morphological and depositional history mainly resulted from interaction between sediment supply and tectonic activity, which caused segmentation of the major valley trunk into localized subsiding depocenters separated by upwarping blocks. Fluvial sedimentation occurred until late Calabrian time, when the major river abandoned that valley, where minor fluvio-lacustrine depocenters allowed accumulation of siliciclastic and carbonate deposits. The present study demonstrates that the infill of the valley was not controlled by the forcing that caused its incision. Accumulation of the fluvial succession is discussed here in relation with localized, tectonic-controlled base levels, which commonly prevent from establishing of a clear downdip stratigraphic correlations. Chronological reconstruction of the study depositional dynamics provides solid constrains to frame them in the tectono-sedimentary evolution of the Northern Apennines. ? 2021 by the authors. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103538130&doi=10.3390%2fgeosciences11030141&partnerID=40&md5=52e14923b4f52a5215cab9b9358bdbbf https://scholars.lib.ntu.edu.tw/handle/123456789/571623 |
ISSN: | 20763263 | DOI: | 10.3390/geosciences11030141 |
顯示於: | 地質科學系 |
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