B
Bettina Scheu
Researcher at Ludwig Maximilian University of Munich
Publications - 94
Citations - 3096
Bettina Scheu is an academic researcher from Ludwig Maximilian University of Munich. The author has contributed to research in topics: Volcano & Pyroclastic rock. The author has an hindex of 29, co-authored 82 publications receiving 2463 citations. Previous affiliations of Bettina Scheu include University of Tokyo.
Papers
More filters
Journal ArticleDOI
The fragmentation threshold of pyroclastic rocks
TL;DR: In this article, the authors defined the fragmentation threshold as the minimum pressure differential that leads to complete fragmentation of the pressurized porous rock sample, which is defined as a critical pressure difference between the bubbles and the surrounding magma.
Journal ArticleDOI
Permeability and degassing of dome lavas undergoing rapid decompression: An experimental determination
TL;DR: In this article, the authors used a modified shock-tube-based fragmentation bomb to measure the gas permeability of volcanic rocks and found that at low porosity, gas escape occurs predominantly through microcracks or elongated micropores.
Journal ArticleDOI
Permeability control on magma fragmentation
TL;DR: In this article, a comprehensive database of combined gas permeability and fragmentation experiments was used to deduce a fragmentation criterion that incorporates gas permeabilities as well as porosity and internal overpressure, which implies that the energy required for fragmentation is less dependent on the actual pore geometry than on the way the void space is interconnected and thus on the contribution of permeable gas flow to decompression.
Journal ArticleDOI
Fragmentation efficiency of explosive volcanic eruptions : A study of experimentally generated pyroclasts
TL;DR: In this article, a series of rapid decompression experiments on three sets of natural samples from Unzen volcano, Japan were performed by dry sieving for particles larger than 250 μm and wet laser refraction for smaller particles.
Journal ArticleDOI
A multidisciplinary approach to quantify the permeability of the Whakaari/White Island volcanic hydrothermal system (Taupo Volcanic Zone, New Zealand)
Michael J. Heap,Ben Kennedy,Jamie Farquharson,James Ashworth,Klaus F. X. Mayer,Mark Letham-Brake,Thierry Reuschlé,H. Albert Gilg,Bettina Scheu,Yan Lavallée,P.A. Siratovich,Jim Cole,Arthur D. Jolly,Patrick Baud,Donald B. Dingwell +14 more
TL;DR: In this article, a multidisciplinary study aims to better understand the porosity of active volcanic hydrothermal systems, a vital prerequisite for modelling and understanding their behaviour and evolution.