Mike Heap

Personal information

Nationality: English

Languages: English, French (basic), and German (basic)

Email: heap "at" unistra.fr

Position: maître de conférences classe normale (5 ème échelon)

Office: D 105 (5, rue René Descartes)

Skype ID: michaeljheap

Employment and Education

2010-onwards Maître de conférence at EOST, Université de Strasbourg, France

2009-2010 Post-doc (funded by BV MatWerk and the DFG, [DFG GZ: PO 405/13-1]) at Ludwig Maximilians Universität München, Germany. Project: "Modelling of temporal and thermal weakening of volcanic material involved in the construction of historical buildings"

2005-2009 Ph.D (defended April 2009) at University College London, UK. Principal supervisor: Philip Meredith. Co-supervisors: Patrick Baud and Sergio Vinciguerra. Examiners: Ernie Rutter and Teng-fong Wong. Title: Creep: time-dependent brittle deformation in rocks [link to UCL news item] [link to UCL electronic resources]

2001–2005 First class (hons) MESci in geology at University of Liverpool, UK. Supervisor for Masters project: Dan Faulkner

Research Interests

The mechanical behaviour of rocks


Time-dependent deformation


Geothermal energy

Click [here] to access the LDR page

Teaching and Responsibilities


Click [here] to go to Mike Heap's teaching page

Strasbourg: TD physique des roches 2A (rock physics); TD mécanique des fluide et écoulements 1A (mechanics of fluid and flow); TP mesures géophysiques en laboratoire 1A and 2A (geophysical laboratory classes); stage de terrain 3A (mesures géophysiques sur la terrain); lectures in M1 and M2 (pétrophysique, microstructurale cassant, physique des roches appliquée aux réservoirs et aux risques).

Taught summer school in Northeastern University (Shenyang, China) in 2016 "Rock physics and natural hazards"

Won Erskine Fellowship to teach at University of Canterbury (New Zealand) between May and August 2017



  • Ph.D students supervised:

[4] Amy Ryan (2017-) (based at UBC, Vancouver, Canada): "Permeability evolution in lava domes: a trigger for explosive activity" (co-supervised with Kelly Russell)

[3] Chong-feng Chen (2015-) (based at Northeastern University, Shenyang, spent one year at Strasbourg): "Creep and fatigue in sandstone' (co-supervised with Tao Xu)

[2] Luke Griffiths (2015-, IPG Strasbourg, Ecole Doctorale/LABEX): "Thermal microcracking in rocks" (co-supervised with Patrick Baud)

[1] Jamie Farquharson (2013-2016), IPG Strasbourg, Initiative d’Excellence: Contrats Doctoraux): “Permeability evolution through the brittle-ductile transition in volcanic rocks” (co-supervised with Patrick Baud)

  • Masters students supervised:

[7] Fei Wang (2015, IPG Strasbourg) "Permeability anisotropy of the Triassic sediments at Soultz/Rittershoffen: A combined field and laboratory study"

[6] Lilliane Corvasce (2013-14, IPG Strasbourg)

[5] Luke Griffiths (2013-14, IPG Strasbourg) “Thermal shock cooling in rocks: Application to geothermal energy”

[4] Mark Letham-Brake (University of Canterbury, New Zealand) “Crater permeability of Whakaari (White Island), New Zealand”

[3] Gilles Lacroix (2012-13, IPG Strasbourg) “Etude des caractéristiques pétrophysiques de serpentinites et de calcaires de la marge Ibérique”

[2] Linda Petrakova (LMU, Munich): "Testing the stability of volcanic edifices"

[1] Marco Perrotti (Università degli Studi G. d'Annunzio Chieti, Italy): "Variations of mechanical, physical and chemical properties of Etnean rocks induced by temperature: geophysical and volcanological implications"

  • I have supervised many diplômes ingénieurs (3ème année) and projets recherches (2A) at EOST, Université de Strasbourg
  • I have been a topical editor for open-access journal Solid Earth since 2012
  • I have reviewed manuscripts for a variety of international journals (Science, Geology, Earth and Planetary Science Letters, Geophysical Research Letters, Journal of Geophysical Research, Pure and Applied Geophysics, Mechanics of Materials, Engineering Geology, Geophysical Journal International, Tectonophyics, Physics and Chemistry of the Earth, International Journal of Rock Mechanics and Mining Sciences, Fire and Materials, Journal of Archaeological Science, International Journal of Geomechanics, Materials and Structures, International Journal of Solids and Structures, Contributions to Mineralogy and Petrology, Computers and Geotechnics, special book volumes of the Geological Society, International Journal of Greenhouse Gas Control)
  • I have reviewed large grants
  • I have been an invited speaker at both AGU and EGU
  • I have organised sessions at EGU (2010, 2012, 2015, and 2017)


IDEX Prix scientifiques 2017: "Les espoirs de l'Université de Strasbourg" ("the hope of the University of Strasbourg") 10000 Euro research prize.

Elsevier "Outstanding Reveiwer" award for International Journal of Rock Mechanics and Mining Sciences (awarded October 2014) [certificate]

Awarded the "prime d'excellence scientifique (PES)" at the Université de Strasbourg (2012)

Awarded £600 Graduate School Travel Grant (UCL) to attend the American Geophysical Union (AGU) annual general meeting 2008 in San Francisco, USA

Awarded "Young Researcher" financial support to attend the annual general meeting of the European Geophysical Union (EGU) 2008 in Vienna, Austria

Paper "Quantifying the evolution of static elastic properties in variably fractured crystalline rock" (Heap and Faulkner, 2008) nominated for the TSG Ramsay Medal (best publication to appear within two years of a doctoral award)

Awarded "Young Researcher" financial support to attend Euro-Conference of "Rock Physics and Geomechanics" on Natural hazards: thermo-hydro-mechanical processes in rocks in Erice, Sicily 2007

Awarded £75 for 2nd prize in departmental (UCL) poster competition

Runner-up to best poster at Geological Society of London Tectonics Studies Group (TSG), Manchester 2006

Awarded £200 Geological Society of London Tectonics Study Group (TSG) travel grant to attend Gordon Rock Deformation conference, Big Sky, Montana

Awarded £602 Graduate School Travel Grant (UCL) to attend Gordon Rock Deformation conference, Big Sky, Montana

Hunter Prize (UoL) for "excellence in geology" 2005

Dave Johnston Mapping Prize nominee 2005 (for the best mapping project in the UK and Ireland)

Runner-up to best poster at Geological Society of London Tectonics Studies Group (TSG) annual general meeting, Plymouth 2005

Newell Prize (UoL) for "excellence in geology" 2004

UK Mineralogical Society Student of the Year 2003

Proposals funded (PI only)

[12] Hubert Curien Partnership (PHC) GALILEE 2017

  • 4250 Euros for 2017
  • PIs: M. J. Heap (Strasbourg) and S. Martino (La Sapienza - Università di Roma)
  • Project: Landslide-triggered tsunami hazard in the mediterranean: improving risk mitigation strategies by understanding natural processes 

[11] Hubert Curien Partnership (PHC) CAI YUANPEI 2016-2018

  • 7750 Euros for 2016
  • PIs: M. J. Heap (Strasbourg) and T. Xu (Northeastern University)
  • Project: Time-dependent deformation in andesitic stratovolcanoes: Experiments and numerical modelling

[10] Royal Society International Exchanges (U.K. - France) 2016-2018

  • 11990 GBP
  • PIs: H. Tuffen (Lancaster) and M. J. Heap (Strasbourg)
  • Project: Volcanic valves: The permeability of tuffisites

[9] CNRS INSU projet: Terre Solide (ALEAS) 2016

  • 5000 Euros
  • PI: M. J. Heap (Strasbourg)
  • Project: Permeability reduction timescales in densifying magma

[8] Hubert Curien Partnership (PHC) France-Germany PROCOPE award [link] 2015-2016

  • 3928 Euros in 2015
  • PI's: M. J. Heap (Strasbourg) and B. Scheu (LMU, Munich)
  • Project: Hot hydrothermal volcanic systems: The impact of high temperatures on the physical and mechanical properties of hydrothermally-altered volcanic rocks

[7] Hubert Curien Partnership (PHC) XU GUANGQI 2014 [linkaward 

  • 3500 Euros
  • PI's: M. J. Heap (Strasbourg) and T. Xu (Northeastern University, China)
  • Project: The influence of vesicle/bubble size on the brittle strength of volcanic rocks and magmas
  • News article for visit to Northeastern University, Shenyang [click here]
  • News article for visit to Liaoning University of Science and Technology, Anshan City [click here]

[6] Hubert Curien Partnership (PHC) France-New Zealand DUMONT D'URVILLE award [link] 2013-2014

  • 10480 Euros (5240 Euros in both 2014 and 2015)
  • PI's: M. J. Heap (Strasbourg) and B. Kennedy (Canterbury)
  • Project: Permeability stimulation in geothermal reservoirs: A laboratory study

[5] CNRS INSU projet: Terre Solide (ALEAS) 2013

  • 5000 Euros
  • PI: M. J. Heap (Strasbourg)
  • Project: Étude de la stabilité les édifices volcaniques

[4] LABoratoires d’EXcellence (LABEX) G-Eau-Thermie Profonde funding [link] 2013

  • 100 000 Euros
  • PI: M. J. Heap (Strasbourg)
  • Project: Long-term stability of a geothermal reservoir: an experimental approach

[3] Initiative D’EXcellence (IDEX) "actractivité" [link] 2012

  • 200 000 Euros
  • PI: M. J. Heap (Strasbourg)
  • Project: VOLPERM: Deformation and permeability of volcanic rocks at high temperature: implications for volcanic hazard assessment

[2] Hubert Curien Partnership (PHC) France-Germany PROCOPE award [link] 2012-2013

  • 6600 Euros (3800 Euros in 2012 and 2800 Euros in 2013)
  • PI's: M. J. Heap (Strasbourg) and D. B. Dingwell (LMU, Munich)
  • Project: The Stability of the volcanic edifice at Volcán de Colima, Mexico

[1] Nuffield Foundation Research Bursary [link] 2004

  • 1358 GBP
  • PI's: D. R. Faulkner and M. J. Heap (both UoL)
  • Project: Quantifying the static elastic evolution of crystalline rock approaching failure


H-index = 22 (SCOPUS) Total citations = 1387 (SCOPUS) Co-authors = 113 (SCOPUS)

Google Scholar Citations


[77] Marmoni, G., Martino, S., Heap, M.J., Reuschlé, T. (2017) Gravitational slope-deformation of a resurgent caldera: new insights from the mechanical behaviour of Mt. Nuovo tuffs (Ischia Island, Italy), Journal of Volcanology and Geothermal Research, accepted. [pdf link]

[76] Violay, M., Heap, M.J., Acosta, M.A., and Madonna, C., 2017. Porosity evolution at the brittle-ductile transition in the continental crust: Implications for deep hydro-geothermal circulation. Nature Scientific Reports, accepted. [OPEN ACCESS]

[75] Vasseur, J., Wadsworth, F.B., Heap, M.J., Main, I.G., Lavallée, Y., and Dingwell, D.B., 2017. Does an inter-flaw length control the accuracy of rupture forecasting in geological materials? Earth and Planetary Science Letters, accepted. [pdf link]

[74] Tang, S.B., Huang, R.Q., Tang, C.A., Liang, Z.Z., and Heap, M.J., 2017. The failure processes analysis of rock slope using numerical modelling techniques, Engineering Failure Analysis, 79, 999-1016. DOI: doi.org/10.1016/j.engfailanal.2017.06.029. [pdf link]

[73] Marmoni, G., Martino, S., Heap, M.J., and Reuschlé, T., 2017. Multiphysics Laboratory Tests for Modelling Gravity-Driven Instabilities at Slope Scale, Procedia Engineering, 191, 142-149. DOI: 10.1016/j.proeng.2017.05.165. [pdf link]

[72] Mikhail, S. and Heap, M.J., 2017. Hot climate inhibits volcanism on Venus: Constraints from rock deformation experiments and argon isotope geochemistry, Physics of the Earth and Planetary Interiors, 268, 18-34. DOI: doi.org/10.1016/j.pepi.2017.05.007. [pdf link]

[71] Farquharson, J.I., Wadsworth, F.B., Heap, M.J., and P. Baud, 2017. Time-dependent permeability evolution in compacting volcanic fracture systems and implications for gas overpressure, Journal of Volcanology and Geothermal Research, 339, 81-97. DOI: doi.org/10.1016/j.jvolgeores.2017.04.025. [pdf link]

[70] Xu, T., G.L. Zhou, M.J. Heap, W.C. Zhu, C.F. Chen, and P. Baud, 2017. The influence of temperature on time-dependent deformation and failure in granite: A mesoscale modeling approach, Rock Mechanics and Rock Engineering, 10.1007/s00603-017-1228-9. [pdf link]

[69] Farquharson, J. I., P. Baud, and M. J. Heap (2017), Inelastic compaction and permeability evolution in volcanic rock, Solid Earth, 8, 561–581. [OPEN ACCESS]

[68] Griffiths, L., Heap, M.J., Xu, T., Chen, C.-f., Baud, P., 2017. The influence of pore geometry and orientation on the strength and stiffness of porous rock, Journal of Structural Geology, 96, 149-160. DOI: 10.1016/j.jsg.2017.02.006. [pdf link]

[67] Heap, M.J., Violay, M., Wadsworth, F.B., and Vasseur, J., 2017. From rock to magma and back again: The evolution of temperature and deformation mechanism in conduit margin zones, Earth and Planetary Science Letters, 463, 92-100. DOI: 10.1016/j.epsl.2017.01.021. [pdf link]

[66] Wadsworth, F.B., Heap, M.J., Damby, D.E., Hess, K.-U., Najorka, J., Vasseur, J., Fahrner, D., and Dingwell, D.B., 2017. Local geology controlled the feasibility of vitrifying Iron Age buildings, Nature Scientific Reports, 7, Article number: 40028, DOI: 10.1038/srep40028. [OPEN ACCESS]

[65] Farquharson, J. I., P. Baud, and M. J. Heap (2016), Inelastic compaction and permeability evolution in volcanic rock, Solid Earth Discussions, DOI: 10.5194/se-2016-166 [pdf link]

[64] Heap, M. J., P. Byrne, and S. Mikhail (2017), Low surface gravitational acceleration of Mars results in a thick and weak lithosphere: Implications for topography, volcanism, and hydrology, Icarus, 281, 103-114, DOI: 10.1016/j.icarus.2016.09.003. [pdf link]

[63] 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, D.B. Dingwell, (2017), 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, 332, 88-108. DOI: 10.1016/j.jvolgeores.2016.12.004. [pdf link]

[62] Dondin, F., Heap, M.J., Robertson, R.E.A., Dorville, J.-F., and Carey, S. (2016), Flank Instability Assessment at Kick-'em-Jenny Submarine Volcano (Grenada, Lesser Antilles): A Multidisciplinary Approach Using Experiments and Modeling, Bulletin of Volcanology, 79:5. [OPEN ACCESS]

[61] Farquharson, J. I., M. J. Heap, and P. Baud (2016), Strain-induced permeability increase in volcanic rock, Geophysical Research Letters, 43, DOI:10.1002/2016GL071540. [pdf link]

[60] Heap, M.J., J.K Russell, and L.A. Kennedy (2016), Mechanical behaviour of dacite from Mount St. Helens (USA): A link between porosity and lava dome extrusion mechanism (dome or spine)?, Journal of Volcanology and Geothermal Research, 328, 159-177, DOI: 10.1016/j.jvolgeores.2016.10.015. [pdf link]

[59] Griffiths, L., M.J. Heap, F. Wang, D. Daval, H.A. Gilg, P. Baud, J. Schmittbuhl, and A. Genter (2016). Geothermal implications for fracture-filling hydrothermal precipitation. Geothermics, 64, 235-245, DOI: 10.1016/j.geothermics.2016.06.006. [pdf link]

[58] Siratovich, P.A., M.J. Heap, M.C. Villeneuve, J. Cole, B.M. Kennedy, J. Davidson, T. Reuschlé (2016). Mechanical behaviour of the Rotokawa Andesites (New Zealand): Insight into permeability evolution and stress-induced behaviour in an actively utilised geothermal. Geothermics, 64, 163-179. DOI: 10.1016/j.geothermics.2016.05.005. [pdf link]

[57] Farquharson, J. I., M. J. Heap, Y. Lavallée, N. Varley, and P. Baud, 2016. Evidence for the development of permeability anisotropy in lava domes and volcanic conduits. Journal of Volcanology and Geothermal Research, 323, 163–185. [pdf link]

[56] Heap, M. J., and Kennedy B. M. (2016). Exploring the scale-dependent permeability of fractured andesite. Earth and Planetary Science Letters, 447, 139-150. DOI: 10.1016/j.epsl.2016.05.004. [pdf link]

[55] Baud, P., Rolland, A., Heap, M.J., Xu, T., Nicolé, M., Ferrand, T., Reuschlé, T., Toussaint, R., and Conil, N. (2016). Impact of stylolites of the mechanical strength of limestone. Tectonophysics, 690, Part A, 4-20. [pdf link]

[54] Heap, M. J., Wadsworth, F. B., Xu, T., Chen, C.-f., and Tang, C.-a. 2016. The strength of heterogeneous volcanic rocks: A 2D approximation. Journal of Volcanology and Geothermal Research, 319, 1-11. [pdf link]

[53] Heap, M. J., and Wadsworth, F. B., 2016. Closing an open system: Pore pressure changes in permeable edifice rock at high strain rates. Journal of Volcanology and Geothermal Research, 315, 40-50, DOI: 10.1016/j.jvolgeores.2016.02.011. [pdf link]

[52] Kushnir, A. R. L., Martel, C., Bourdier, J.-L., Heap, M. J., Reuschlé, T., Erdmann, S., Komorowski, J.-C., Cholik, N., 2016. Probing permeability and microstructure: Unravelling the role of a low-permeability dome on the explosivity of Merapi (Indonesia). Journal of Volcanology and Geothermal Research, 316, 56-71, DOI: 10.1016/j.jvolgeores.2016.02.012. [pdf link]

[51] Wadsworth, F. B., M. J. Heap, and D. B. Dingwell, 2016. Friendly fire: Engineering a fort wall in the Iron Age. Journal of Archaeological Science, 67, 7-13, DOI: 10.1016/j.jas.2016.01.011. [OPEN ACCESS]

[50] Farquharson, J. I., M. J. Heap, P. Baud, T. Reuschlé, and N. Varley, 2016. Pore pressure embrittlement in a volcanic edifice. Bulletin of Volcanology. 78(6) [pdf link] [Figure 5, high-resolution]

[49] 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, 429, 223-233. [pdf link]

[48] Mayer, K., Scheu, B., H. A. Gilg, M. J. Heap, B. M. Kennedy, Y. Lavallée, M. Letham-Brake, and D. B. Dingwell, 2015. Experimental constraints on phreatic eruption processes at Whakaari (White Island volcano). Journal of Volcanology and Geothermal Research, 302, 150-162. [OPEN ACCESS]

[47] Wiesmaier, S., Heap, M. J., Branca, S., Gilg, H. A., Kueppers, U., Hess, K.-U., Lavallée, Y., and Dingwell, D. B., 2015. Variability in composition and physical properties of the sedimentary basement of Mt Etna, Italy. Journal of Volcanology and Geothermal Research, 302, 102-116. [pdf link]

[46] Heap M. J., Brantut, N., Baud, P., and Meredith P. G., 2015. Time-dependent compaction band formation in sandstone. Journal of Geophysical Research. DOI: 10.1002/2015JB012022. [OPEN ACCESS]

[45] Heap, M. J., T. Xu, A. R. L. Kushnir, B. Kennedy, and C.-f. Chen, 2015. Fracture of magma containing overpressurised pores. Journal of Volcanology and Geothermal Research, 301, 180-190. [pdf link]

[44] 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. [OPEN ACCESS]

[43] 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. [pdf link]

[42] 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. [OPEN ACCESS]

[41] 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. [pdf link]

[40] Heap, M. J., T. Xu, and C.-f. Chen, 2014. The influence of porosity and vesicle size on the brittle strength of volcanic rocks and magmas. Bulletin of Volcanology. 76:856, doi; 10.1007/s00445-014-0856-0. [pdf link]

[39] Brantut, N., M. J. Heap, P. Baud, and P. G. Meredith, 2014. Mechanisms of time-dependent deformation in porous limestone. Journal of Geophysical Research, DOI: 10.1002/2014JB011186. [OPEN ACCESS]

[38] Siratovich, P., Heap, M. J., Villenueve, M. C., Cole, J. W., and Reuschlé, T., 2014. Physical property relationships of the Rotokawa Andesite, a significant geothermal reservoir rock in the Taupo Volcanic Zone, New Zealand. Geothermal Energy, 2:10. [OPEN ACCESS]

[37] Heap, M. J., Lavallée, Y., Petrakova, L., Baud, P., Reuschlé, T., Varley, N., and Dingwell, D. B., 2014. Microstructural controls on the physical and mechanical properties of edifice-forming andesites at Volcán de Colima, Mexico. Journal of Geophysical Research, DOI: 10.1002/2013JB010521. [OPEN ACCESS]

[36] Brantut, N., M. J. Heap, P. Baud, and P. G. Meredith, 2014. Rate and strain-dependent brittle deformation of rocks. Journal of Geophysical Research, 117 (B8), DOI: 10.1002/2013JB010448. [OPEN ACCESS]

[35] Heap, M. J., Baud, P., Meredith, P. G., Vinciguerra, S., Reuschlé, T., 2014. The permeability and elastic moduli of tuff from Campi Flegrei, Italy: Implications for ground deformation modelling. Solid Earth, 5, 25-44. [OPEN ACCESS]

[34] Heap, M. J., Baud, P., Reuschlé, T., and Meredith, P. G., 2014. Stylolites in limestones: Barriers to fluid flow? Geology, 42, 51-54doi:10.1130/G34900.1. [OPEN ACCESS]

[33] Brantut, N., Baud, P., Heap, M. J., and Meredith, P. G., 2013. Mechanics of time-dependent deformation in crustal rocks. Poromechanics V - Proceedings of the 5th Biot Conference on Poromechanics, 407-414. [pdf link]

[32] Heap, M. J., Baud, P., Meredith, P. G., Vinciguerra, S., Reuschlé, T., 2013. The permeability and elastic moduli of tuff from Campi Flegrei, Italy: Implications for ground deformation modelling. Solid Earth Discussions, 5, 1-43. [OPEN ACCESS]

[31] Mollo, S., Heap, M. J., Dingwell, D. B., Hess, K.-U., Iezzi, G., Masotta, M., Scarlato, P., Vinciguerra, S., 2013. Decarbonation and thermal microcracking under magmatic P-T-fCO2 conditions: the role of skarn substrata in promoting volcanic instability. Geophysical Journal International. DOI: 10.1093/gji/ggt265. [pdf link]

[30] Kendrick, J. E., Lavallée, Y., Hess, K.-U., Heap, M. J., Gaunt, H. E., Meredith, P. G., Dingwell, D. B., 2013. Tracking the permeable porous network during strain-dependent magmatic flow. Journal of Volcanology and Geothermal Research, 260, 117-126. [OPEN ACCESS]

[29] Brantut, N., M. J. Heap, P. G. Meredith, and P. Baud, 2013. Time-dependent cracking and brittle creep in crustal rocks: A review. Journal of Structural Geology, 52, 17-43. [pdf link]

[28] Heap, M. J., Lavallée, Y., Laumann, A., Hess, K.-U., Meredith, P. G., Dingwell, D. B., Huismann, S., Weise, F., 2013. The influence of thermal-stressing (up to 1000 °C) on the physical, mechanical, and chemical properties of siliceous-aggregate, high-strength concrete. Construction and Building Materials, 42, 248-265. doi: 10.1016/j.conbuildmat.2013.01.020. [pdf link]

[27] Lavallée, Y., Benson, P. M., Heap, M. J., Hess, K.-U., Flaws, A., Schillinger, B., Meredith, P. G., Dingwell, D. B., 2013. Reconstructing magma failure and the degassing network of dome-building eruptions. Geology, doi:10.1130/G33948.1 [pdf link]

[26] Heap, M. J., S. Mollo, S. Vinciguerra, Y. Lavallée, K.-U. Hess, D. B. Dingwell, P. Baud, G. Iezzi, 2013. Thermal weakening of the carbonate basement under Mt. Etna volcano (Italy): implications for volcano instability. J. Vol. Geo. Res. 250, 42-60. [pdf link]

[25] Kolzenburg, S., M.J. Heap, Y. Lavallée, J.K. Russell, P.G. Meredith, and D.B. Dingwell, 2012. Strength and permeability recovery of tuffisite-bearing andesite. Solid Earth, 3, 191–198. [OPEN ACCESS]

[24] Benson, P. M., Heap, M. J., Lavallée, Y., Flaws, A., Hess, K.-U., Selvadurai, A. P. S., Dingwell, D. B., 2012. Laboratory simulations of tensile fracture development in a volcanic conduit via cyclic magma pressurisation. Earth Plant. Sci. Lett., 349, 231-239. [pdf link]

[23] Brantut, N., P. Baud, M.J. Heap, and P.G. Meredith, 2012. Micromechanics of Brittle Creep in Rocks. J. Geophys. Res - Solid Earth, 117 (8), art. no. B08412, doi:10.1029/2012JB009299. [pdf link]

[22] Mollo, S., Heap, M. J., Iezzi, G., Hess, K.-U., Scarlato, P., Dingwell, D. B., 2012. Volcanic edifice weakening via decarbonation: a self-limiting process? Geophys. Res. Lett. 39 (15), art. no. L15307, doi: 10.1029/2012GL052613. [pdf link]

[21] Hot tuff not so tough. Nature, 484, 144, doi:10.1038/484144a [pdf link]

[20] Xu, T., C.-a. Tang, J. Zhao, L. Li, and M. J. Heap, 2012. Modelling the time-dependent rheological behaviour of heterogeneous brittle rocks, Geophysical Journal International, 198, 1781-1796, doi: 10.1111/j.1365-246X.2012.05460. [pdf link]

[19] Kolzenburg, S., M.J. Heap, Y. Lavallée, J.K. Russell, P.G. Meredith, and D.B. Dingwell, 2012. The strength and permeability of tuffisite-bearing andesite in volcanic conduits. Solid Earth Discuss., 4, 459-473, doi:10.5194/sed-4-459-2012. [OPEN ACCESS]

[18] Kushnir, A., G. Andrews, J. K. Russell, R. J. Enkin, L. A. Kennedy, M. J. Heap, and S. Quane, 2012. Rock Physical-Property Measurements for the Nechako Basin Oil and Gas Region, Central British Columbia (Parts of NTS 093B, C, E, F, G, K, L), Geoscience BC, Report 2012-1, 125-150. [pdf link]

[17] Lavallée, Y., T. M. Mitchell, M. J. Heap, J. Vasseur, K-U. Hess, T. Hirose, and D. B. Dingwell, 2012. Experimental generation of volcanic pseudotachylites: constraining rheology. Journal of Structural Geology, 38, 222-233. [pdf link]

[16] Heap, M. J., Lavallée, Y., Laumann, A., Hess, K-U., Meredith, P. G., and Dingwell, D. B., 2012. How tough is tuff in the event of fire? Geology, doi: 10.1130/G32940.1. [pdf link] [toll-free link] [GSA Data Repository]

Press releases: [Université de Strasbourg, communiqués de presse]; [CNRShebdo]; [Nature Research Highlight]; [L'Actu Journal électronique interne de Université de Strasbourg]; [Science Codex]; [EOST website]; [Lettre de l'EOST]

[Nature Podcast]: Fast-forward to 12:26 to hear about tuff!

[15] Andrews, G., Quane, S., Enkin, R.J., Russell, K., Kushnir, A., Kennedy, L., Hayward, N. and Heap, M. J (2011): Rock physical property measurements to aid geophysical surveys in the Nechako Basin oil and gas region, central British Columbia; Geoscience BC, Report 2011-10, 40 p. [pdf link]

[14] Lavallée, Y., P. M. Benson, M. J. Heap, A. Flaws, K.-U. Hess, D. B. Dingwell, 2011. Volcanic conduit failure as a trigger to magma fragmentation. Bulletin of Volcanology, doi: 10.1007/s00445-011-0544-2. [pdf link]

[13] Mollo, S., Vinciguerra, S., Iezzi, G., Iarocci, A., Scarlato, P., Heap, M. J., Dingwell, D. B., 2011. Volcanic edifice weakening via devolatilization reactions, Geophysical Journal International, doi: 10.1111/j.1365-246X.2011.05097. [pdf link]

[12] Bell, A. F., Naylor, M., Heap, M. J., Main, I. G., 2011. Forecasting volcanic eruptions and other material failure phenomena: an evaluation of the failure forecast method. Geophysical Research Letters, doi:10.1029/2011GL048155. [pdf link]

[11] Mollo, S., Tuccimei, P., Heap, M.J., Vinciguerra, S., Soligo, M., Castelluccio, M., Scarlato, P., Dingwell, D. B., 2011. Increase in radon emission due to rock failure: an experimental study. Geophysical Research Letters, 48, L14304, doi:10.1029/2011GL047962. [pdf link]

[10] Heap, M. J., Baud, P., Meredith, P. G., Vinciguerra, S., Bell, A. F. and Main, I. G., 2011. Brittle creep in basalt: implications for time-dependent volcano deformation. Earth and Planetary Science Letters, 307, 71-82. [pdf link]

[9] Bell, A. F., Greenough, J., Heap, M. J. and Main, I. G., 2011. Challenges for forecasting based on accelerating rates of earthquakes at volcanoes and laboratory analogues. Geophysical Journal International, 185, 718-723. [pdf link]

[8] Heap, M. J., D. R. Faulkner, P. G. Meredith and S. Vinciguerra, 2010. Elastic moduli evolution and accompanying stress changes with increasing crack damage: implications for stress changes around fault zones and volcanoes during deformation. Geophysical Journal International, 183, 225-236. [pdf link]

[7] Grindrod, P. M., Heap, M. J., Meredith, P. G., Tripetta, F., Sammonds, P. M., Wood, I. G. and Fortes, D., 2010. Experimental Investigation of the Mechanical Properties of Magnesium Sulfate Hydrates under Martian Conditions. J. Geophys. Res., doi:10.1029/2009JE003552. [pdf link]

[6] Heap, M. J., Baud, P., Meredith, P. G., 2009. The influence of temperature on brittle creep in sandstones. Geophys. Res. Lett., doi:10.1029/2009GL039373. [pdf link]

[5] Ventura, G., Vinciguerra, S., Moretti, S., Meredith, P. G., Heap, M. J., Baud, P., Shapiro, S. A., Dinske, C. and Kummerow, J., 2009. Understanding slow deformation before dynamic failure. T. Beer (ed.), Geophysical Hazards, International Year of Planet Earth, doi: 10.1007/978-90-481-3236-2_14, C Springer Science+Business Media B.V. [pdf link]

[4] Heap, M. J., Baud, P., Meredith, P. G., Bell, A. F. and Main, I. G., 2009. Time-dependent brittle deformation in Darley Dale sandstone. J. Geophys. Res, 114, B07203, doi: 10.1029/2008JB006212. [pdf link]

[3] Heap, M. J., S. Vinciguerra, P. G. Meredith, 2009. The evolution of elastic moduli with increasing damage during cyclic stressing of a basalt from Mt. Etna volcano. Tectonophysics, 471, 153-160. [pdf link]

[2] Heap, M. J. and D. R. Faulkner, 2008. Quantifying the static elastic evolution of crystalline rock approaching failure. International Journal of Rock Mechanics and Mining Sciences, 45/4, 564-573. [pdf link]

[1] Faulkner, D. R., Mitchell, T. M., Healy, D. and Heap, M. J., 2006. Slip on 'weak' faults by the rotation of regional stress in the fracture damage zone. Nature, 444, 922-925. [pdf link]

Press releases: [Rock and Rotation]; [ScienceDaily]