Lavini di Marco (Trentino, Italy): 36Cl exposure dating of a polyphase rock avalanche

Martin, Silvana; Campedel, Paolo; Ivy‐Ochs, Susan; Viganò, Alfio; Alfimov, Vasily; Vockenhuber, Christof; Andreotti, E.; Carugati, Gabriele; Pasqual, Daria; Rigo, Manuel

doi:10.1016/j.quageo.2013.08.003

Cited by 37 publications

(18 citation statements)

References 37 publications

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“…As the exposure time of historical events is both short and generally affected by inheritance (e.g. Merchel et al ., ; Martin et al ., ; this study), we suggest avoiding production calibration from the deposits of historical events. Nevertheless, rock avalanche deposits with independently determined age in the Mont Blanc Massif remain to be explored for cosmogenic nuclide production rate calibration.…”

Section: Discussionmentioning

confidence: 99%

Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

et al. 2014

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To calibrate the in situ 10Be production rate, we collected surface samples from nine large granitic boulders within the deposits of a rock avalanche that occurred in AD 1717 in the upper Ferret Valley, Mont Blanc Massif, Italy. The 10Be concentrations were extremely low and successfully measured within 10% analytical uncertainty or less. The concentrations vary from 4829 ± 448 to 5917 ± 476 at g−1. Using the historical age exposure time, we calculated the local and sea level‐high latitude (i.e. ≥60°) cosmogenic 10Be spallogenic production rates. Depending on the scaling schemes, these vary between 4.60 ± 0.38 and 5.26 ± 0.43 at g−1 a−1. Although they correlate well with global values, our production rates are clearly higher than those from more recent calibration sites. We conclude that our 10Be production rate is a mean and an upper bound for production rates in the Massif region over the past 300 years. This rate is probably influenced by inheritance and will yield inaccurate (e.g. too young) exposure ages when applied to surface‐exposure studies in the area. Other independently dated rock‐avalanche deposits in the region that are approximately 103 years old could be considered as possible calibration sites.

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Section: Discussionmentioning

confidence: 99%

Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

et al. 2014

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“…In addition, several spatial concentrations of slope failures have been observed in the Alps. Well-known spatial clusters occur, for example, around Flims / Chur in Switzerland (Abele, 1974;Ivy-Ochs et al, 2009a), the Fernpass region of Tyrol in Austria (Prager et al, 2008), and the Trentino Province in Italy (Abele, 1974;Soldati et al, 2004;Martin et al, 2014). In our study area in the Bernese Alps, Switzerland, between the Kander valley and Gemmi Pass, deposits of several large landslides are known, including the Kander valley rock avalanche , the nearby Oeschinensee rock avalanche (Abele, 1974), as well as the Klein Rinderhorn and the Daubensee rock avalanches studied in detail here.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Two early Holocene rock avalanches in the Bernese Alps (Rinderhorn, Switzerland)

et al. 2016

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“…Subaerial mass movements, like rockfalls, may reach the lake basin and are often detected but rarely analyzed in terms of depositional characteristics (Hermanns et al, ; Schnellmann et al, ). While short‐term (months‐years) frequency and magnitude information has boosted due to LiDAR monitoring and other methods (Krautblatter et al, ; Perret et al, ; Ravanel et al, ; Sass et al, ; Stoffel, ), long‐term information on rock‐slope failure recurrence rates is still only available for single well‐dated sites (e.g., Martin et al, ). Here analyzing the depositional characteristics of rockfall in a lake basin may allow for a more complete understanding of rock‐slope failures and their mobility processes (Bussmann & Anselmetti, ).…”

Section: Introductionmentioning

confidence: 99%

Multistage Rock‐Slope Failures Revealed in Lake Sediments in a Seismically Active Alpine Region (Lake Oeschinen, Switzerland)

et al. 2018

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Late Glacial and Holocene rock‐slope failures occur often as multistage failures where paraglacial adjustment and stress adaptation are hypothesized to control phases of detachment. However, only limited data sets are available to decipher large multistage rock‐slope failures in detail. Here we apply sedimentology, radiocarbon dating, and geophysics to reconstruct multistage rock‐slope failure recorded in lake sediments. We present a unique inventory from Lake Oeschinen (Bernese Alps, Switzerland) covering ~2.5 kyr of rock‐slope failure history. The lake sediments have been investigated using sediment‐core analysis, radiocarbon dating, and seismic‐to‐core and core‐to‐core correlations, which were linked to (pre‐) historic and meteorological records. The results imply that the lake in its present extent is significantly younger than the ~9.5‐kyr‐old Kandersteg rock avalanche in the close vicinity. Up to eleven rock‐slope failure events could be identified and related to specific detachment scarps, which provided information for energy considerations. Four events likely coincided with (pre‐) historic earthquakes. At least six events detached from the same area, potentially initiated by prehistoric seismicity and later from stress‐relaxation processes. The data imply unexpected high recurrence rates (~1/300 years) and also help to understand the generation of a historical lake‐outburst flood. Here we show how polymethodical analysis of lake sediments can help to decipher massive multistage rock‐slope failures, which are often camouflaged in subaerial settings.

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Lavini di Marco (Trentino, Italy): 36Cl exposure dating of a polyphase rock avalanche

Cited by 37 publications

References 37 publications

Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

Two early Holocene rock avalanches in the Bernese Alps (Rinderhorn, Switzerland)

Multistage Rock‐Slope Failures Revealed in Lake Sediments in a Seismically Active Alpine Region (Lake Oeschinen, Switzerland)

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Lavini di Marco (Trentino, Italy): 36Cl exposure dating of a polyphase rock avalanche

Cited by 37 publications

References 37 publications

Minor inheritance inhibits the calibration of the10Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

Minor inheritance inhibits the calibration of the10Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

Two early Holocene rock avalanches in the Bernese Alps (Rinderhorn, Switzerland)

Multistage Rock‐Slope Failures Revealed in Lake Sediments in a Seismically Active Alpine Region (Lake Oeschinen, Switzerland)

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Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

Minor inheritance inhibits the calibration of the¹⁰Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps