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| Titel |
Constructing a time series for large landslides in Trentino (Italy) with 36Cl exposure dating |
| VerfasserIn |
S. Ivy-Ochs, S. Martin, P. Campedel, V. Alfimov, E. Andreotti, A. Viganò, G. Carugati, C. Vockenhuber, S. Cocco |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069983
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| Zusammenfassung |
| The Trentino province of NE Italy is characterized by numerous large landslides and rock
avalanche deposits, notably in valleys that are rather densely inhabited. One may gain
fundamental information for calculation of return times of slope collapses by surface
exposure dating of boulders and scarp area bedrock. First investigations focus on the
following landslides: Lavini di Marco (covering an area of 15.7 km2), Marocche di Dro (8.1
km2), Molveno (5.0 km2); Palone (2.5 km2), Castelpietra (0.4 km2), Marzola (12.5
km2). Field surveys that indicate multi-phase activity serve as a basis for sampling.
Cosmogenic 36Cl was used due to the predominance of limestone and dolomite. In
this presentation, interpretation of (in some cases scattered) age distributions at
individual sites will be discussed, especially the frequency of pre-exposure. The
distribution in time of the Trentino, mass movement events will be considered in light
of what is known about paleoseismicity in the region, the timing of other large
landslides in the Alps, and the sequence of climate variations during the Holocene. |
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