Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms
Triggering mechanisms and causative processes of Deep Seated Gravitational Slope Deformations (DSGSD) in alpine areas can trigger by several processes such as post-glacial debuttressing, earthquake-induced ground shaking or co-seismic surface faulting. Distinguishing between climatic and tectonicall...
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ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/1949320 2024-01-28T10:06:26+01:00 Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms LIVIO, FRANZ CASTELLETTI, LANFREDO A. Zerboni M. Tremari D. Mazzola R. Amit Livio, Franz A., Zerboni Castelletti, Lanfredo M., Tremari D., Mazzola R., Amit 2014 ELETTRONICO http://hdl.handle.net/11383/1949320 eng eng 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia volume:31 issue:suppl. 1 firstpage:528 lastpage:528 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11383/1949320 info:eu-repo/semantics/article 2014 ftuninsubriairis 2024-01-03T17:49:22Z Triggering mechanisms and causative processes of Deep Seated Gravitational Slope Deformations (DSGSD) in alpine areas can trigger by several processes such as post-glacial debuttressing, earthquake-induced ground shaking or co-seismic surface faulting. Distinguishing between climatic and tectonically-driven factors for such slope deformations is challenging, since faults and fracture systems can play both an active and/or passive role in the initiation of slope processes. Nevertheless this issue has major implications both in the reconstruction of the recent evolution of the landscape and in paleoseismological studies. Here we present a study on a Deep Seated Gravitational Slope Deformation (DSGSD) located in the Cavargna Valley, N Italy. The deformed slope presents a moderate relief with an elevation drop of ca. 650 meters (from 1750 to 1100 m a.s.l.), is characterized by a typical concave-convex profile and shows morpho-features commonly caused by deep-seated slope movements (e.g., Agliardi et al. 2001; Gutierrez-Santolalla et al. 2005). The DSGSD area and its surrounding was not under extensive glaciations conditions. In fact: (i) The main ice cap which covered the alpine valley during Pleistocene reached an elevation of ca. 950 m during Latl Glacial Maximum, (ii) glacial and periglacial erosional features suggest that only small cirque glaciers locally occupied higher elevations, above 1700 m a.s.l. (e.g., Bini et al. 2009). The study area experienced a considerable regional deformation due to post glacial rebound: an uplift of ca. 90 m, reached mainly between 21 kyr and 13 kyr BP (e.g., Norton & Hampel 2010). The rate of the uplift due to post-glacial isostasy decreases with time and can be considered negligible. The integrated approach of this study, including morpho-structural analysis, geologic field survey, ERT geophysical survey, a paleoseismological approach applied to the deformed slope, 14C dating and a detailed pedosedimentary analysis on trench infilling enable us to date the onset of the ... Article in Journal/Newspaper Ice cap IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
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IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
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ftuninsubriairis |
language |
English |
description |
Triggering mechanisms and causative processes of Deep Seated Gravitational Slope Deformations (DSGSD) in alpine areas can trigger by several processes such as post-glacial debuttressing, earthquake-induced ground shaking or co-seismic surface faulting. Distinguishing between climatic and tectonically-driven factors for such slope deformations is challenging, since faults and fracture systems can play both an active and/or passive role in the initiation of slope processes. Nevertheless this issue has major implications both in the reconstruction of the recent evolution of the landscape and in paleoseismological studies. Here we present a study on a Deep Seated Gravitational Slope Deformation (DSGSD) located in the Cavargna Valley, N Italy. The deformed slope presents a moderate relief with an elevation drop of ca. 650 meters (from 1750 to 1100 m a.s.l.), is characterized by a typical concave-convex profile and shows morpho-features commonly caused by deep-seated slope movements (e.g., Agliardi et al. 2001; Gutierrez-Santolalla et al. 2005). The DSGSD area and its surrounding was not under extensive glaciations conditions. In fact: (i) The main ice cap which covered the alpine valley during Pleistocene reached an elevation of ca. 950 m during Latl Glacial Maximum, (ii) glacial and periglacial erosional features suggest that only small cirque glaciers locally occupied higher elevations, above 1700 m a.s.l. (e.g., Bini et al. 2009). The study area experienced a considerable regional deformation due to post glacial rebound: an uplift of ca. 90 m, reached mainly between 21 kyr and 13 kyr BP (e.g., Norton & Hampel 2010). The rate of the uplift due to post-glacial isostasy decreases with time and can be considered negligible. The integrated approach of this study, including morpho-structural analysis, geologic field survey, ERT geophysical survey, a paleoseismological approach applied to the deformed slope, 14C dating and a detailed pedosedimentary analysis on trench infilling enable us to date the onset of the ... |
author2 |
Livio, Franz A., Zerboni Castelletti, Lanfredo M., Tremari D., Mazzola R., Amit |
format |
Article in Journal/Newspaper |
author |
LIVIO, FRANZ CASTELLETTI, LANFREDO A. Zerboni M. Tremari D. Mazzola R. Amit |
spellingShingle |
LIVIO, FRANZ CASTELLETTI, LANFREDO A. Zerboni M. Tremari D. Mazzola R. Amit Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
author_facet |
LIVIO, FRANZ CASTELLETTI, LANFREDO A. Zerboni M. Tremari D. Mazzola R. Amit |
author_sort |
LIVIO, FRANZ |
title |
Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
title_short |
Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
title_full |
Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
title_fullStr |
Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
title_full_unstemmed |
Why did the slope at Cavargna Valley Sackung (N Italy) start moving? Preliminary results on causative/triggering mechanisms |
title_sort |
why did the slope at cavargna valley sackung (n italy) start moving? preliminary results on causative/triggering mechanisms |
publishDate |
2014 |
url |
http://hdl.handle.net/11383/1949320 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_relation |
87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia volume:31 issue:suppl. 1 firstpage:528 lastpage:528 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11383/1949320 |
_version_ |
1789333303766024192 |