GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 Tectonic and climatic control on Holocene sedimentation in minor mountain lacustrine basins: the Lake Moo case study (Northern Apennines, Italy) S. Segadelli 1 , K. Ogata 2 , M. Cocuccioni 3 , S. Gambini 4 , L. Martelli 1 , L.F. Morandi 5 , G. Oppo 6 1 Geological, Soil and Seismic Area, Emilia-Romagna Region, Viale della Fiera 8, 40127 Bologna, Italy 2 Department of Earth Sciences, Environment and Resources, University of Naples Federico II, 80126 Naples, Italy 3 Freelance Researcher, Via dell’Ongaro 8, 21010 Cardano al Campo, Italy 4 Geologist Freelance, Cascina Tirogno 4/F, 27012 Certosa di Pavia, Italy 5 Competence Center Archaeometry-Baden-Württemberg, Eberhard-Karls-Universität Tübingen, Wilhelm Str. 14 56, 72074 Tübingen, Germany 6 Geologist Freelance, Vicolo San Clemente 1, 43043 Borgo Val di Taro, Italy Abstract The broad understanding of short- to long-term geological hazards is fundamental for safe and sustainable land management, especially in tectonically active zones. However, in many geological contexts, the clues preserved in the recent geological record are not always evident, and their origin is often controversial. In this framework, the small-scale (<1 km 2 ) lacustrine systems developed in relatively young and tectonically active mountain belts can record important information on a multitude of geological processes. The multidisciplinary contextualisation of such dynamic basins indeed provides the unique opportunity to reconstruct the complex interplay between sedimentary and tectonic processes with extremely high detail on the small spatial-temporal scale (Segadelli et al. 2022). This is exemplified in the case of the Northern Apennines, where allochthonous units made up by lithoid blocks comprising obducted ophiolites of various dimensions occur within easily erodible argillaceous mélange-type units and flysches, being highly tectonized due to orogenic processes ( Fig. 1A ). Here, several mountain lakes associated with small-scale catchment areas developed atop such km-scale ophiolite bodies, with a clear structural control due to tectonic and gravitational faulting (Segadelli et al. 2022).