Textural analyses of PDC deposits from the 2006 eruption of Tungurahua volcano, Ecuador: insights on syn-emplacement erosion processes

Abstract:

Pyroclastic density currents (PDC) are one of the most destructive phenomena occurring on volcanoes and threaten many people worldwide. The hazardous nature of PDC and the presence of co-PDC ash clouds make any direct observation of their emplacement difficult. Studying PDC deposits is thus a valuable approach to better understand internal mechanisms of these phenomena. Previous works on PDC deposits strongly suggest that erosion processes occur during PDC emplacement. Our study aims at quantifying the importance of erosion by estimating the volume and the mass of juvenile and non-juvenile materials in the deposits through detailed componentry analysis of natural deposits. Our goal is to identify the origin of the incorporated material, and then to evaluate the impact of syn-erosive processes on PDC emplacement and mobility. In this work we develop a new method to determine both the …

Año de publicación:

2013

Keywords:

Fuente:

google