Volcanic Debris Avalanches: Introduction and Book Structure

Roverato, Matteo; Dufresne, Anja

doi:10.1007/978-3-030-57411-6_1

Cited by 4 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Volcanic debris avalanches (VDAs) are large landslide events generated by volcanic edifice flank collapses (Ui, 1983;Siebert, 1984;Roverato and Dufresne, 2021) and are a common occurrence in the history of most volcanoes (Siebert and Roverato, 2021). They mobilise volumes up to tens of km 3 , and less often up to hundreds of km 3 , with runout distances up to 100 km (Dufresne et al, 2010b).…”

Section: Introductionmentioning

confidence: 99%

Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

et al. 2023

View full text Add to dashboard Cite

Introduction: Volcanic debris avalanches mobilise large volumes and achieve long runouts with high destructive potential. However, the propagation processes that generate them are not currently explained by theoretical or numerical models, which are unable to represent deposit observations. Evaluation of the dynamics represented in deposits is therefore vital for constraining su ch models. The Abona volcanic debris avalanche deposit is located on the southern flank of the island of Tenerife, Spain. The deposit exhibits universal microfracturing and cataclasis. Fluidal features such as fluidal mixing of lithological units and diffuse boundaries, and mixed matrix are observed throughout the deposit.Methods: Field description including sedimentology and facies identification and the evaluation of their distribution have allowed the generation of a new conceptual model for the propagation dynamics of this volcanic debris avalanche, and potentially others with similar properties. The deposit is indurated making the detailed study of its sedimentology difficult, especially clast-size analysis. A novel method utilising structure from motion photogrammetry and photographic sampling was employed.Results: The universal cataclasis of the material and fluidal features suggest that the lack of a major competent material component allowed the mass to fragment and enabled fluidised granular flow behaviour. It is proposed that shear was periodically distributed throughout the body of the avalanche in chaotic temporary shear networks rearranging according to the instantaneous distribution of the mass. Stress and agitation were not temporally or spatially homogenous during propagation. This is also reflected in the unsystematic erosion of the substrate according to the variable basal shear accommodation.Discussion: It is proposed that lithological properties are potentially a determining factor for the propagation mechanisms, stress distribution, and consequently the evolution of a volcanic debris avalanche from the initial collapse to its emplacement. This study highlights the importance of dedicated field examinations of sedimentological, morphological, and structural features for providing constraints for models of volcanic debris avalanche dynamics and the factors dictating them. The novel methodology proposed has the potential of broadening the number of events that can be studied and enhancing the understanding of these complex and hazardous phenomena.

show abstract

Section: Introductionmentioning

confidence: 99%

Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

et al. 2023

View full text Add to dashboard Cite

show abstract

“…A volcanic debris avalanche (VDA) is known as the process formed due to the disaggregation of a landslide, or landslide from a volcanic building [11] [12].…”

Section: Introductionmentioning

confidence: 99%

Volcaniclastic Deposit Analysis Using Grain Size, Digital and Stereological Techniques

Rangel-Durán,

Espejel-García,

Villalobos-Aragón

et al. 2023

OJCE

View full text Add to dashboard Cite

This study undertook a comprehensive sedimentological and grain-size analysis of two previously uncharacterized volcanoclastic deposits exposed in the northwestern sector of Chihuahua City, Mexico. The primary objective was to propose a systematic genetic classification for these deposits, employing traditional sedimentological techniques and an advanced computerized granulometric analysis technique based on orthogonal images to discern their grain size distribution. Through these studies, evidence was sought to classify them genetically, presenting arguments to define them either as a lahar or a volcanic debris avalanche. Results were critically compared against existing literature data pertaining to lahars and debris avalanches, yielding moderate success. The analysis identified one of the deposits as a non-eruptive or posteruptive lahar. This identification was substantiated by the delineation of distinct overbank and transition facies within the deposit, providing compelling evidence for its genetic classification.

show abstract

Mountain Landslides: An Overview of Common Types and Future Impacts

Geertsema

Alcántara-Ayala²

2022

Montology

View full text Add to dashboard Cite

Volcanic Debris Avalanches: Introduction and Book Structure

Cited by 4 publications

References 54 publications

Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

Volcaniclastic Deposit Analysis Using Grain Size, Digital and Stereological Techniques

Mountain Landslides: An Overview of Common Types and Future Impacts

Contact Info

Product

Resources

About