Jamie Farquharson
CURRENT RESEARCH
I am currently a post-doctoral research associate at the University of Miami. My primary area of research is the influence of external forces, such as extreme precipitation, on the frequency and magnitude of volcanic activity.
VOLCANOLOGIST
/'fɑː(r)kəsən/
An advancing lava flowfront during the 2011 Puyehue-Cordón Caulle eruption. The first observed emplacement of rhyolitic lava!
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EXPERIENCE & EDUCATION
B.Sc. (Hons) Environmental Geography
University of Stirling, UK 2007-2011
Research assistant
Centro de Intercambio e Investigación en Vulcanología, Mexico 2011-2012
This position focussed on the ongoing monitoring and analysis of Volcán de Colima. This included collection and analysis of volcanic thermal data, digitisation of seismic events, and taking field measurements of soil, water and fumarolic gases. Whilst at CIIV I was involved in the deployment and field testing of infrasound arrays, as well as testing a range of geochemical, geothermal and geodesic equipment. Part of the CIIV volunteer program.
M.Sc. Volcanology & Geological Hazards
Lancaster University, UK 2012-2013
My M.Sc. project, "Examining rhyolite lava flow dynamics through multi-dimensional image analysis of the 2011 eruption of Puyehue Cordón-Caulle, Chile", involved studying active rhyolitic lava flows using novel imaging techniques, and won the Lancaster Environment Centre dissertation prize.
Ph.D. Experimental Volcanology
Université de Strasbourg, France 2013-2016
My thesis, titled "Permeability evolution in volcanic systems", was supervised by Prof. Patrick Baud and Dr. Mike Heap. The research involved suites of deformation experiments on volcanic rocks (primarily samples from Volcán de Colima), in order to assess how the physical properties of edifice rocks can impact the dynamics of a volcanic eruption. These experiments were complemented by field data and numerical modelling. The research was funded through the Initiative d'excellence [IDEX] framework.
Postdoctoral research assistant
Université de Strasbourg, France 2016-present
Experimental stimulation of geothermal reservoir rocks, under the DESTRESS Horizon-2020 framework. The project investigates the evolution of the strength and fluid-flow properties of reservoir material during acid stimulation. Working in the Laboratiore de Déformation des Roches at EOST.
Farquharson, J. I., B. Wild, A. R. L. Kushnir, M. J. Heap, P. Baud, and B. Kennedy. Acid-induced dissolution of andesite: evolution of permeability and strength. JGR: Solid Earth. 124 (2019), 257-273. doi: 10.1029/2018JB016130
Heap, M. J., M. C. Villeneuve, A. R. L. Kushnir, J. I. Farquharson, P. Baud, and T. Reuschlé. Rock mass strength and elastic modulus of the Buntsandstein: An important lithostratigraphic unit for geothermal exploitation in the Upper Rhine Graben. Geothermics. 77 (2019), 236-256. doi: 10.1016/j.geothermics.2018.10.003
Mordensky, S. P., M. C. Villeneuve, J. I. Farquharson, B. M. Kennedy, M. J. Heap, and D. M. Gravely. Rock mass properties and edifice strength data from Pinnacle Ridge, Mt. Ruapehu, New Zealand. Journal of Volcanology and Geothermal Research. 367 (2018), 46-62. doi: 10.1016/j.jvolgeores.2018.09.012
Farquharson, J. I., and F.B. Wadsworth. Upscaling permeability in anisotropic volcanic systems. Journal of Volcanology and Geothermal Research. 364 (2018), 35-47. doi: 10.1016/j.jvolgeores.2018.09.002.
Farquharson, J. I., and F.B. Wadsworth. Introducing Volcanica: The first diamond open-access journal for volcanology. Volcanica. 1 (1), i-ix. doi: 10.30909/vol.01.01.i-ix.
Heap, M. J., J. I. Farquharson, A. R. L. Kushnir, Y. Lavallée, P. Baud, H. A. Gilg, and T. Reuschlé. The influence of water on the strength of Neapolitan Yellow Tuff, the most widely used building stone in Naples (Italy). Bulletin of Volcanology. 80(6), 81-97.
Mordensky, S. P., M.C.Villeneuve, B. M. Kennedy, M. J. Heap, D. M. Gravley, J. I. Farquharson, and T. Reuschlé. Physical and mechanical property relationships of a shallow intrusion and volcanic host rock, Pinnacle Ridge, Mt. Ruapehu, New Zealand. Journal of Volcanology and Geothermal Research. 339, 81-97.
Farquharson, J. I., F.B. Wadsworth, M. J. Heap, and P. Baud. Time-dependent permeability evolution in compacting volcanic fracture systems and implications for gas overpressure. Journal of Volcanology and Geothermal Research. 339, 81-97.
Farquharson, J. I., P. Baud, and M. J. Heap. Inelastic compaction and permeability evolution in volcanic rock. Solid Earth, 8, 561-581, doi:10.5194/se-8-561-2017
Heap, M.J., B.M. Kennedy, J. I. Farquharson, J. Ashworth, K. Mayer, M. Letham-Brake, T. Reuschlé, H.A. Gilg, B. Scheu, Y. Lavallée, P. Siratovich, J. Cole, A.D. Jolly, P. Baud, and D.B. Dingwell. A multidisciplinary approach to quantify the permeability of the Whakaari/White Island volcanic hydrothermal system (Taupo Volcanic Zone, New Zealand). Journal of Volcanology and Geothermal Research, DOI: 10.1016/j.jvolgeores.2016.12.004.
Farquharson, J. I., M. J. Heap, and P. Baud. Strain-induced permeability increase in volcanic rock. Geophysical Research Letters, doi: 10.1002/2016GL071540.
Farquharson, J. I., M. J. Heap, Y. Lavallée, N. R. Varley, P. Baud. Evidence for the development of permeability anisotropy in lava domes and volcanic conduits. Journal of Volcanology and Geothermal Research, 323, pp.163-185.
Farquharson, J. I., M. J. Heap, P. Baud, T. Reuschlé, N. R. Varley. Pore pressure embrittlement in a volcanic edifice. Bulletin of Volcanology, 78(6).
Farquharson, J. I., M. James, H. Tuffen, 2015. Examining rhyolite lava flow dynamics through photo-based 3D reconstructions of the 2011-2012 lava flowfield at Cordón-Caulle, Chile. Journal of Volcanology and Geothermal Research. 304, 336–348.
Heap, M. J., J. I. Farquharson, F. B. Wadsworth, S. Kolzenburg, and J. K. Russell, 2015. Timescales for permeability reduction and strength recovery in densifying magma. Earth and Planetary Science Letters, DOI: 10.1016/j.epsl.2015.07.053.
Heap, M. J., J. I. Farquharson, P. Baud, Y. Lavallée, and T. Reuschlé, 2015. Fracture and compaction of andesite in a volcanic edifice. Bulletin of Volcanology. 77: 55. DOI: 10.1007/s00445-015-0938-7.
Farquharson, J. I., M. J. Heap, N. Varley, P. Baud, and T. Reuschlé, 2015. Permeability and porosity relationships of edifice-forming andesites: A combined field and laboratory study. Journal of Volcanology and Geothermal Research. 297, 52-68.
Heap, M. J., B. Kennedy, N. Perrin, L. Jacquemard, P. Baud, J. I. Farquharson, B. Scheu, Y. Lavallée, H. A. Gilg, M. Letham-Brake, K. Mayer, A. D. Jolly, T. Reuschlé, and D. B. Dingwell, 2015. Mechanical behaviour and failure modes in the Whakaari (White Island volcano) hydrothermal system, New Zealand. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2015.02.012.
Heap, M. J., S. Kolzenburg, J. K. Russell, M. E. Campbell, J. Welles, J. I. Farquharson, A. Ryan, 2014. Conditions and timescales for welding block-and-ash flow deposits. Journal of Volcanology and Geothermal Research. 289, 202-209.
PUBLICATIONS
The island of Whakaari hosts a complex hydrothermal system.
Our ongoing work investigates the physical and mechanical properties of this "natural laboratory".
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PERMEABILITY EVOLUTION IN FRACTURES
Part of my PhD research involved developing a model to track permeability evolution in sintering volcanic fracture systems, along with Fabian Wadsworth, Mike Heap, and Patrick Baud.
Follow the link (left) to access and download the MATLAB code.
The script is described in full in Time-dependent permeability evolution in compacting volcanic fracture systems and implications for gas overpressure, published in JVGR.
An example of the model output, for a fracture system at Mt Unzen, Japan. Model parameters (such as fracture geometry and abundance, magma temperature, crystal content &c.) have been derived from literature. Full details are provided in the paper. In this case, the healing of fractures in the systems proceeds at a rate slow enough to allow the interstitial gas fraction to outgas from the system. In turn, this means that pressure in the fractures will not increase to the point of explosive failure.
TECHNICAL PROFICIENCIES
Vector graphics software
Excel, Word, Powerpoint
QUICK ID
Website
Address
james.farquharson@rsmas.miami.edu
https://heap08.wixsite.com/jamie
Department of Marine Geology and Geophysics
Rosenstiel School of Marine and Atmospheric Sciences
University of Miami
4600 Rickenbacker Causeway
Miami, Florida 33149-1031
USA