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Research and Development of High-performance Explosives

Research and Development of High-performance Explosives

Published on: February 20, 2016

Controls on explosive-effusive volcanic eruption styles.

Mike Cassidy¹, Michael Manga², Kathy Cashman³

¹Department of Earth Sciences, University of Oxford, Oxford, South Parks Road, OX1 3AN, UK. michael.cassidy@earth.ox.ac.uk.

Nature Communications

|July 21, 2018

Summary

This summary is machine-generated.

Understanding volcanic eruptions requires knowing why eruptive styles change. This review explores how magma viscosity, gas loss, and conduit geometry influence whether silicic magma eruptions are explosive or effusive.

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Area of Science:

Volcanology
Geophysics
Earth Sciences

Background:

Volcanic hazard assessment faces challenges in predicting eruptive style changes.
Understanding the transition between explosive and effusive eruptions is crucial.

Purpose of the Study:

To review the competing processes governing explosive versus effusive eruptions of silicic magmas.
To identify key magmatic properties and external factors influencing eruptive style.

Main Methods:

Literature review of feedback mechanisms in magmatic systems.
Analysis of interrelated magmatic properties and processes.

Main Results:

Eruptive style is controlled by feedbacks between magma viscosity, gas loss, and conduit geometry.
These factors dictate magma ascent speed, decompression, and outgassing rates.

Conclusions:

Magma ascent dynamics and outgassing behavior are primary determinants of volcanic eruptive style.
Predicting eruptive style evolution requires understanding these complex interactions.