Melt stripping and agglutination of pyroclasts during the explosive eruption of low viscosity magmas.

ABSTRACT: Volcanism on Earth and on other planets and satellites is dominated by the eruption of low viscosity magmas. During explosive eruption, high melt temperatures and the inherent low viscosity of the fluidal pyroclasts allow for substantial post-fragmentation modification during transport obscuring the record of primary, magmatic fragmentation processes. Here, we show these syn-eruption modifications, in the form of melt stripping and agglutination, to be advantageous for providing fundamental insights into lava fountain and jet dynamics, including eruption velocities, grain size distributions and melt physical properties. We show how enigmatic, complex pyroclasts termed pelletal lapilli form by a two-stage process operating above the magmatic fragmentation surface. Melt stripping from pyrocl

SUBMITTER: Jones TJ 

PROVIDER: S-EPMC8863896 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature