NDLI: The recent Plinian explosive activity of Mt. Pelée volcano (Lesser Antilles): The P1 AD 1300 eruption

Content Provider	Springer Nature Link
Author	Carazzo, Guillaume Tait, Steve Kaminski, Edouard Gardner, James E.
Copyright Year	2012
Abstract	Plinian explosive eruptions represent a major volcanic hazard in the Lesser Antilles Arc that must be carefully assessed based on reconstructions of past activity. The present study focusses on a detailed time evolution of the P1 eruption (AD 1300) at Mt Pelée volcano (Martinique). After an initial dome-forming stage, a Plinian phase commenced. The P1 Plinian-style sequence is mostly a pumice fall deposit with an inversely graded base, interbedded with a surge deposit, and overlain by final flow/surge deposit. Field data on deposit dispersal, thickness, and grain-size distribution are used together with physical models to reconstruct the dynamical evolution of this eruption. We find that the mass eruption rate increased from 2×107 to 9×107 kg s − 1, producing a 19–22-km-high Plinian plume, initially stable but which ultimately collapsed to form a ~1.3-km-high fountain. Empirical models of deposit thinning suggest that the minimum volume of pyroclastic deposits is 0.15 km3, about 25 % that previously estimated. Published data on magmatic water contents in glass inclusions are used together with mass discharge rates to elucidate the mechanisms leading to column collapse. Conditions at the base of the column were close to the plume/fountain transition soon after the Pelean/Plinian-style transition due to the competing effects of increase in both gas content and mass discharge rate. After a short stage of partial collapse, the column underwent a total collapse due to an increasing discharge rate.
Starting Page	2187
Ending Page	2203
Page Count	17
File Format	PDF
ISSN	02588900
Journal	Bulletin of Volcanology
Volume Number	74
Issue Number	9
e-ISSN	14320819
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-09-27
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mt Pelée volcano Plinian eruption Tephra dispersal Column collapse Eruptive dynamics Sedimentology Mineralogy Geophysics/Geodesy Geology
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

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