​​​​​​​Dr Matthew Jason Mayne​MattNASA-3.jpg


 

Lecturer, Department of Earth Sciences, Stellenbosch University

Email:   mmayne@sun.ac.za

              mjmayne@outlook.com​​

 

Phone: +27 21 808 3128

              +27 72 900 5487

 

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​Research:

Phase equilibrium modelling allows us to predict the stable phase assemblage of a rock at equilibrium, in other words the composition and proportion of the rock forming minerals. We can do this if we know the pressure, temperature and bulk composition of the rock. However, many processes that effect the evolution of a crustal rock change its effective bulk composition. Therefore, in order to effectively model crustal processes and differentiation of the continental crust I created a new thermodynamic modelling software tool called Rcrust. I wrote the program and created a graphical user i​nterface to allow user friendly access to its calculations. I have published it is as open source software on both of my institutions' respective websites (https://www.sun.ac.za/english/faculty/science/earthsciences/rcrust); have created a user manual for its teaching and have begun presenting it at seminars at a number of universities. In this way I aim to continue to grow and expand the software's user base while simultaneously growing its functionalities.

Concurrent to this methodology research, I am using this software to perform process oriented investigations involving mass transfer. This work focuses on 3 key areas

1)     Anatexis of the continental crust

2)     Economic deposits produced by high temperature metamorphism (focus on critical metals such as Lithium in pegmatites)

3)     The habitability of planets and moons​ 

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Academic qualifications:

PhD (Earth Sciences) co-tutelle (joint degree) between Université Jean Monnet, France and Stellenbosch University

Thesis title: Development of new software tools for phase equilibrium modelling in open systems

Summary: Developed a new software tool for phase equilibrium modelling that allows path dependent bulk compositional change and thereby investigations of earth processes that involve mass transfer. The applications of this novel technique span the fields of igneous and metamorphic petrology

 

Publications:

  • Otto, T., Stevens, G., Moyen, J.F., Mayne, M.J. and Clemens, J.D., (2024). Peritectic orthopyroxene entrainment during partial melting of garnet peridotite produced the Bushveld Complex chromite deposits. Mineralium Deposita, pp.1-13, doi.org/10.1007/s00126-024-01277-0.  [IF=5.21, Q1 Economic Geology] 
  • Wang, Y., Gao, P., Sun, G.C., Mayne, M.J., Zhang, J., Yin, C. and Qian, J. (2024). Zircon Hf isotope behavior during the magmatic-hydrothermal processes: A case study from the Yashan pluton, South China. Lithos, 470, p.107519, doi.org/10.1016/j.lithos.2024.107519 [IF=3.913, Q1 Geology] 
  • Hoffman, S., Mayne, M.J., Stevens, G. and Moyen, J.F. (2023). Applying phase equilibria modelling to igneous systems by coupling trace element partitioning and accessory phase saturation to compositionally variable thermodynamic modelling in Rcrust. Lithos 458, 107335, doi.org/10.1016/j.lithos.2023.107335 [IF=3.913, Q1 Geology] 
  • Gao, P., Wang, Y., Sun, G.C., Mayne, M.J., Zhang, J., Yin, C. and Qian, J. (2023). The contributions of (meta-)sedimentary or granitic orthogneissic sources to the Cenozoic Himalayan granites, Contributions to Mineralogy and Petrology 178 (7), 46, doi.org/10.1007/s00410-023-02027-7. [IF=3.23, Q1 Geochemistry and Petrology]
  • Otto, T., Stevens, G., Mayne, M.J. and Moyen, J.F. (2023). Phase equilibrium modelling of partial melting in the upper mantle: A comparison between different modelling methodologies and experimental results. Lithos, 444, p.107111, doi:10.1016/j.lithos.2023.107111. [IF=4.02, Q1 Geology]
  • Babedi, L., von der Heyden, B.P., Tadie, M. and Mayne, M.J. (2023). Trace elements in pyrite from five different gold ore deposit classes: A review and meta-analysis. Geological Society, London, Special Publications, 516, doi:10.1144/SP516-2021-41. [IF=2.683, Q1 Geology]
  • Von der Heyden, B.P., Todd, C., Mayne, M.J. and Doggart, S. (2023). Zipf rank analysis highlights the exploration potential for Lithium-Caesium-Tantalum-type pegmatites in the Northern Cape, South Africa. Journal of African Earth Sciences, p.104769, doi:10.1016/j.jafrearsci.2022.104769. [IF=2.468, Q2 Geology] 
  • Clemens, J.D., Bryan, S.E., Mayne, M.J., Stevens, G. and Petford, N. (2022a). How are silicic volcanic and plutonic systems related? Part 1: A review of geological and geophysical observations, and insights from igneous rock chemistry. Earth-Science Reviews, p.104249, doi:10.1016/j.earscirev.2022.104249. [IF=12.41, Q1 Earth and Planetary Sciences]
  • Clemens, J.D., Bryan, S.E., Stevens, G., Mayne, M.J. and Petford, N. (2022b). How are silicic volcanic and plutonic systems related? Part 2: Insights from phase-equilibria, thermodynamic modelling and textural evidence. Earth-Science Reviews, p.104250, doi:10.1016/j.earscirev.2022.104250. [IF=12.41, Q1 Earth and Planetary Sciences]
  • García-Arias, M., Pineda-Rodríguez, N.A., Blanco-Quintero, I.F. and Mayne, M.J. (2022). Generation of magmatism under active continental margins: A thermodynamic study of subduction and translithospheric diapirs. Lithos, p.106881, doi:10.1016/j.lithos.2022.106881. [IF=3.913, Q1 Geology] 
  • Magnani, L., Farina, F., Pezzotta, F., Dini, A., Mayne, M.J. and Bartoli, O. (2022). Role of aqueous fluids during low pressure partial melting of pelites in the Adamello pluton contact aureole (Italy). Lithos, 430, p.106853, doi:10.1016/j.lithos.2022.106853. [IF=3.913, Q1 Geology] 
  • Mukherjee, S., Dey, A., Choudhury, S.R. and Mayne, M.J. (2022). Effect of source heterogeneity, melt extraction and crystal separation on the composition of a suite of ferroan (A-type) granites from parts of the Chotanagpur Granite Gneissic complex (CGGC), India. Lithos, p.106875, doi:10.1016/j.lithos.2022.106875. [IF=3.913, Q1 Geology] 
  • Melwani Daswani, M., Vance, S.D., Mayne, M.J. and Glein, C.R. (2021). A metamorphic origin for Europa's ocean. Geophysical Research Letters, 48(18), doi:10.1029/2021GL094143. [IF=4.72, Q1 Earth and Planetary Sciences]
  • Clemens, J. D., Stevens, G. and Mayne, M. J. (2021). Do arc silicic magmas form by fluid-fluxed melting of older arc crust or fractionation of basaltic magmas? Contributions to Mineralogy and Petrology, 176(6), doi:10.1007/s00410-021-01800-w. [IF=3.23, Q1 Geochemistry and Petrology]
  • Gao, P., Zheng, Y.-F., Mayne, M. J. and Zhao, Z.-F. (2021). Miocene high-temperature leucogranite magmatism in the Himalayan orogen. GSA Bulletin, 133 (3-4), 679-690, doi:10.1130/b35691.1. [IF=4.212, Q1 Geology]
  • Mayne, M. J., Stevens, G., Moyen, J. F. and Johnson, T. (2020a). Performing process-oriented investigations involving mass transfer using rcrust: A new phase equilibrium modelling tool. Geological Society, London, Special Publications, 491(1), 209–221, doi:10.1144/SP491-2018-85. [IF=4.418, Q2 Geology]
  • Mayne, M.J., Stevens, G. and Moyen, J. F. (2020b). A phase equilibrium investigation of selected source controls on the composition of melt batches generated by sequential melting of an average metapelite. Geological Society, London, Special Publications, 491(1), 223–241, doi:10.1144/SP491-2018-121. [IF=2.683, Q2 Geology]
  • Farina, F., Mayne, M. J., Stevens, G., Soorajlal, R., Frei, D. and Gerdes, A. (2020). Phase equilibria constraints on fractional crystallization: insights into the petrogenesis of the normally zoned Buddusò Pluton in north-central Sardinia. Geological Society, London, Special Publications, 491(1), 243–265, doi:10.1144/SP491-2019-37. [IF=2.683, Q2 Geology]
  • Nicoli, G., Stevens, G., Moyen, J.F., Vezinet, A. and Mayne, M.J. (2017). Insights into the complexity of crustal differentiation: K2O‐poor leucosomes within metasedimentary migmatites from the Southern Marginal Zone of the Limpopo Belt, South Africa. Journal of Metamorphic Geology, 35, 999–1022, doi: 10.1111/jmg.12265. [IF=4.418, Q1 Geology]
  • ​Mayne, M.J., Moyen, J.F., Stevens, G. and Kaislaniemi, L. (2016). Rcrust: a tool for calculating path-dependent open system processes and application to melt loss. Journal of Metamorphic Geology, 34, 663–682, doi: 10.1111/jmg.12199. [IF=4.418, Q1 Geology]​


​Software Tools:

Rcrust: A thermodynamic software tool designed to perform phase stability calculations with path dependence. GNU General Public License © M.Mayne 2014 available at https://www.sun.ac.za/english/faculty/science/earthsciences/rcrust​

 

Conference outputs:​

  • Otto, T.*, Stevens, G., Moyen, J-F, Mayne, M.J. and Clemens, J.D. (2024). Source peritectic crystal entrainment to mantle magmas produced Earth’s largest chromite deposit. European Geosciences Union General Assembly (EGU), Vienna, Austria. [oral presentation]
  • Coetzer, L*., Stevens, G. and Mayne, M.J. (2024). Conditions in the crust overlying the source of the Darling Batholith within the southernmost Pan-African Saldania Belt. Igneous and Metamorphic Studies Group (IMSG) conference, Lake Eland Game Reserve, KwaZulu-Natal, South Africa  [oral presentation].
  • Pretorious, J.* and Mayne, M.J. (2024). Integrating rotational data to image analysis of petrographic thin sections. Igneous and Metamorphic Studies Group (IMSG) conference, Lake Eland Game Reserve, KwaZulu-Natal, South Africa  [oral presentation].
  • Mayne, M.J.* and Stevens, G. (2024). The trajectory of the P–T path controls the onset of melting in metasedimentary rocks.  Igneous and Metamorphic Studies Group (IMSG) conference, Lake Eland Game Reserve, KwaZulu-Natal, South Africa  [oral presentation].
  • Otto, T.*, Stevens, G., Moyen, J-F, Mayne, M.J. and Clemens, J.D. (2024).The Formation of Layered Mafic Intrusions and Chromitite Seams: Peritectic Crystal Entrainment during Partial Melting in the Mantle. Igneous and Metamorphic Studies Group (IMSG) conference, Lake Eland Game Reserve, KwaZulu-Natal, South Africa  [poster presentation].
  • Mayne, M.J. * (2023). Teaching scientific principles through hypothesis lead experimentation: intuition before formulation, Scholarship of Teaching and Learning (SOTL) conferece, Stellenbosch University [poster presentation].
  • García-Arias, M.*, Pineda-Rodríguez, N., Blanco Quintero, I. and Mayne, M.J., (2023). Compositional variability of Andean-type magmatism: a model involving subducted mélange and restite entrainment. The Hutton Symposium, Baveno, Italy [oral presentation].
  • Magnani, L.*, Mayne, M.J. and Farina, F., (2023). Origin of Li-enriched pegmatites from fluid-present crustal anatexis. The Hutton Symposium, Baveno, Italy [oral presentation].
  • Magnani, L.*, Farina, F., Pezzotta, F., Dini, A. and Mayne, M.J. (2023). The origin of Anatectic Lithium-Cesium-Tantalum pegmatites. Goldschmidt 2023 Conference, Lyon, France [oral presentation]
  • Otto, T.*, Stevens, G., Moyen, J.F., Mayne, M.J. and Clemens, J.D., (2023). Peritectic crystal entrainment during partial melting in the mantle: Importance for the formation of layered ultramafic complexes & chromitite seams. In Goldschmidt 2023 Conference, Lyon, France 10.7185/gold2023.14145. [poster presentation] 
  • Otto, T.*, Stevens, G., Moyen, J.F., Mayne, M.J. and Clemens, J.D., (2023). The importance of peritectic crystal entrainment for the formation of layered mafic intrusions and chromitite seams. International Platinum Symposium, Cardiff, Wales. [oral presentation] 
  • Otto, T.*, Stevens, G., Mayne, M.J. and Moyen, J-F. (2023). Partial melting in the mantle: The importance of peritectic crystal entrainment for the formation of layered mafic intrusions & chromite seams. Geocongress, Stellenbosch, South Africa. [oral presentation]
  • Mayne, M.J.* (2023). Applying phase equilibria modelling to modern petrological problems: assumptions, pitfalls and what we can do about them. Geocongress, Stellenbosch, South Africa. [poster presentation]
  • Magnani, L., Farina, F., Pezzotta, F., Dini, A., Mayne, M.J. and Bartoli, O. (2022). Anatectic Lithium-Cesium-Tantalum pegmatites formation during low pressure metamorphism of metapelites.  In 2022 Goldschmidt Conference, Honolulu, United States of America. [oral presentation]
  • Mayne, M.J.*, Stevens, G. and Hoffman, S. (2022). Accessory phase saturation and trace element partitioning in combination with compositionally flexible phase equilibrium modelling in Rcrust: A new tool for igneous petrology. In 2022 Goldschmidt Conference, Honolulu, United States of America. [oral presentation]
  • Otto, T.*, Stevens, G., Moyen, J.-F. and Mayne, M.J. (2022). Peritectic crystal entrainment: Importance for layered mafic intrusions & chromite seams, IMA2022: 23rd International Mineralogical Association General Meeting, Lyon, France. [online oral presentation]
  • Otto, T.*, Stevens, G., Mayne, M.J. and Moyen, J-F. (2021). Incongruent melting of the mantle: Peritectic mineral entrainment produces silicate layering and chromite seams in magma chambers, 3rd European Mineralogical Conference EMC2020, Cracouw, Poland. [online oral presentation]
  • Magnani, L.*, Farina, F., Pezzotta, F., Dini, A., Mayne, M. and Bartoli, O. (2021). Low P partial melting of metapelites during contact metamorphism in the Forcel Rosso-Mount Ignaga zone of the Adamello Massif (Northern Italy), 3rd European Mineralogical Conference EMC2020, Cracouw, Poland. [oral presentation]
  • Mayne, M.J.* (2021). Adapting phase equilibria modelling to crustal and planetary scale problems (No. EGU21-8190). Copernicus Meetings, Vienna, Austria. [online poster presentation]
  • Hoffman, S.*, Mayne, M. and Stevens, G. (2021). A new methodology for considering minor elements of geologic importance in phase equilibria modelling (No. EGU21-10651). Copernicus Meetings, Vienna, Austria. [online poster presentation]
  • Mayne, M.J.* (2021). Adapting phase equilibria modelling to crustal and planetary scale problems. Metamorphic Studies Group Research in Progress Meeting, Oxford, England [online poster presentation]
  • Farina, F.*, Mayne, M.J., Stevens, G., Soorajlal, R., Frei, D. and Gerdes, A. (2019). Phase equilibria constraints on crystallization differentiation: insights into the petrogenesis of the normally zoned Budduso Pluton (Sardinia, Italy). The 9th Hutton symposium on the origin of granites and related rocks, Nanjing, China. [poster presentation]
  • Mayne, M.J.*, Moyen, J.-F., Janousek, V. and Stevens, G. (2019). Thermodynamically constrained modelling of trace-element behavior in granitic magmas. The 9th Hutton symposium on the origin of granites and related rocks, Nanjing, China. [poster presentation]
  • Mayne, M.J.*, Moyen, J.-F. and Stevens, G. (2019). Adding trace elements to phase equilibria modelling. A method in Rcrust utilising partition coefficients and accessory phase saturation. Petrochro-2019: Melting, modelling, dating the crust, Potsdam, Germany [poster presentation]
  • Mayne, M.J.*, Stevens, G. and Moyen, J.-F. (2019). A phase equilibrium investigation of selected source controls on the composition of melt batches generated by sequential melting of an average metapelite, Igneous and Metamorphic Studies Group (IMSG) meeting, Parys, South Africa [oral presentation]
  • Mayne, M.J.*, Stevens, G., Moyen, J.-F. and Johnson, T.E. (2018). Phase equilibria modelling to understand systems that involve mass transfer, Petrochro Summer School, Sete, France. [poster presentation]
  • Mayne, M.J.*, Stevens, G., Moyen, J.-F. and Johnson, T.E. (2018). Performing process-oriented investigations involving mass transfer using Rcrust: a new phase equilibrium modelling tool, Granulites & granulites 2018, Ullapool, Scotland. [oral presentation]
  • Mayne, M.J.*, Stevens, G., Moyen, J.-F. and Johnson, T.E. (2018). The trajectory of the P–T path controls the onset of melting in metasedimentary rocks, Geophysical Research Abstracts, Vol. 20, European Geosciences Union General Assembly, Vienna, Austria. [oral presentation]
  • Mayne, M.J., Stevens, G., Moyen, J.-F. & Johnson, T.E., The shape of the P-T path controls the solidus: An investigation of fully-hydrated, fluid-absent anatexis of an average metapelite, Goldschmidt Abstracts, 2017 2643, Paris, France. [oral presentation]
  • Stevens, G., Clemens J & Mayne, M.J., The origins of geochemical trends in felsic igneous rocks: Insight into processes in the source, Goldschmidt Abstracts, 2017 3776, Paris, France. [co-author presentation]
  • Mayne, M.J., Stevens, G., Johnson, T.E. & Moyen, J.-F., The inevitability of anataxis during prograde metamorphism under upper-amphibolite facies conditions, Igneous and Metamorphic Studies Group (IMSG) meeting, Johannesburg, South Africa. [oral presentation]
  • Mayne, M.J., Moyen, J.-F., Stevens, G. & Kaislaniemi, L., Rcrust: a new P-T-X modelling tool and application to melt loss, International Geological Congress, American Geosciences Institute, 1026, Cape Town, South Africa. [oral presentation]
  • Mayne, M.J., Moyen, J.-F., Stevens, G. & Kaislaniemi, L., Rcrust: a tool for calculating path-dependent open system processes, Workshop on the Origin and Evolution of Plate Tectonics, Monte Verità, Switzerland. [poster presentation]
  • Mayne, M.J., Moyen, J.-F., Stevens, G. & Kaislaniemi, L., Melt loss inhibits melt productivity. An investigation with Rcrust: a new P-T-X modelling tool, Igneous and Metamorphic Studies Group (IMSG) meeting, Cape Town, South Africa. [oral presentation]
  • ​Mayne, M.J., Moyen, J.-F. & Stevens, G., A new methodology to investigate partial melting of crustal rocks: a new generation of phase diagrams with pressure, temperature and bulk composition as simultaneous variables, Granulites and granulites 2015, Windhoek, Namibia. [oral presentation]

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