F
Fred Witham
Researcher at University of Bristol
Publications - 8
Citations - 608
Fred Witham is an academic researcher from University of Bristol. The author has contributed to research in topics: Magma & Melt inclusions. The author has an hindex of 7, co-authored 8 publications receiving 526 citations.
Papers
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Journal ArticleDOI
A case for CO2-rich arc magmas
TL;DR: This article used ion-microprobe data on H2O, CO2, Be, B, Li and Sc in melt inclusions from the 1980-1986 eruptions of Mount St. Helens.
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Experimental Simulation of Closed-System Degassing in the System Basalt–H2O–CO2–S–Cl
TL;DR: In this article, an alternative experimental approach aimed at directly simulating decompression-driven, closed-system degassing of basaltic magma in equilibrium with an H^C^O^S^Cl fluid under oxidized conditions (fO2 of 1·0^2· 4l og units above the Ni^NiO buffer).
Journal ArticleDOI
SolEx: A model for mixed COHSCl-volatile solubilities and exsolved gas compositions in basalt
Fred Witham,Jonathan D. Blundy,Simon C. Kohn,Priscille Lesne,Jacqueline Eaby Dixon,Sergey V. Churakov,Roman E. Botcharnikov +6 more
TL;DR: A software application, SolEx, to calculate basaltic melt and coexisting vapour compositions in the system C-O-H-S-Cl, satisfactorily reproduces independent literature data on S and Cl behaviour in basalt.
Journal ArticleDOI
Stability of lava lakes
Fred Witham,Edward W. Llewellin +1 more
TL;DR: In this paper, a physical model of a generic lava lake system is developed and a graphical method, based on the system's pressure-depth profile, is developed to predict the subsequent behaviour of the system.
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Conduit convection driving persistent degassing at basaltic volcanoes
F.M. Beckett,Mike Burton,Heidy M Mader,Jeremy C. Phillips,Margherita Polacci,Alison C Rust,Fred Witham +6 more
TL;DR: In this paper, the authors constrain the physical and chemical processes driving an exchange flow of magma in the conduit, in which gas-rich magma ascends, degasses and crystallises and then sinks back down the conduit.