Eruption mechanisms of the Puy de Lemptegy (Auvergnes, France) deduced from its volcano stratigraphy

Abstract

The goal of this paper was to document the stratigraphy of the Lemptegy II deposits and to interpret its eruption dynamics. THe main methods used were: fieldwork, density analysis, ICP-OES analyses, grainsize distribution and thin sections. During the fieldwork the main focus was to set up the lithologs and indicating the different stratigraphic contacts between different deposits. The pyroclasts were observed in detail focussing on: maximum grainsize, shape, vesicularity, grading and specific features belonging to typical pyroclasts. Besides the description of the pyroclasts, also magmatic and tectonic related structures were observed and integrated in the eruption dynamics of Lemptegy II.

Date of Award	29 Jun 2011
Original language	English
Supervisor	Matthieu Kervyn De Meerendre (Co-promotor) & Patric Jacobs (Promotor)