Dr Gemma Mitjanas Colls

Research Fellow

BRC

g.mitjanascolls@uq.edu.au

Dr Gemma Mitjanas' research has a strong focus on geophysical exploration and modeling and 3D geological modeling.

Gemma's research has focused on the acquisition and modeling of different geophysical methods, being the key point the integration between different physical-based techniques and their geological interpretation. On the other hand, the study of the structural geology at different scales has been another research focus, integreting microscopical fracture analysis, photogrammetry, outcrop studies, and regional lineaments analysis. During her PhD, all these methodologies have been mainly applied in geothermal exploration.

Gemma earned her Geology degree at the Universitat de Barcelona, which included the final degree thesis (with honors) focused on the restoration of a lagoon system, part of a LIFE EU program project. She then undertook a master's degree in Reservoir geology and geophysics (Universitat de Barcelona & Universitat Autonoma de Barcelona), where she was awarded by the company REPSOL EXPLORACION S.A. for a Master's thesis focused on the exploration of geothermal systems. This work was extended to a PhD entitled "Geophysical and geological characterisation of fault-controlled geothermal systems". The PhD was part of two international projects, GEO-URBAN (ERA-NET) and PIXIL (Interreg V-A POCTEFA program) and Gemma was also granted a Catalan Government scholarship (APIF19). During her PhD studies, Gemma presented her work in several congresses and seminars, and was awarded the 'Best presentation award' of the Geothermal Winter School (2021).

Publications

Journal Articles (5)

Conference Papers (18)

Research Reports (2)

Journal Articles

Martí, A., Queralt, P., Marcuello, A., Ledo, J., Mitjanas, G., Piña-Varas, P., Freixes, A., Solà, J., Pons, P. and López, J. (2024). Imaging leachate runoff from a landfill using magnetotellurics: The Garraf karst case. Science of The Total Environment, 920 170827, 1-13. doi: 10.1016/j.scitotenv.2024.170827

Mitjanas, G., Walsh, J.J., Roca, E., Alías, G., Queralt, P., Ledo, J. and Piña-Varas, P. (2024). The importance of structural complexity in the localization of geothermal systems: A case study along the Vallès-Penedès Fault in the Catalan Coastal Ranges (NE Spain). Geothermics, 116 102855, 102855. doi: 10.1016/j.geothermics.2023.102855

Piña-Varas, P., Soto, R., Clariana, P., Ayala, C., Rubio, F., Ledo, J., Rey-Moral, C., Martí, A., Mitjanas, G., Queralt, P., Marcuello, A., Santolaria, P. and Pueyo, E. (2023). High-resolution scan of the Pyrenean crustal structure combining magnetotelluric and gravity data. Tectonophysics, 864 230022, 230022. doi: 10.1016/j.tecto.2023.230022

Piña-Varas, Perla, Ledo, Juanjo, Queralt, Pilar, Marcuello, Alex, Mitjanas, Gemma and Martínez Van Dorth, David (2023). Magnetotelluric applied to deep geothermal exploration: Canary Islands Magnetotelúrica aplicada a la exploración geotérmica profunda: Islas Canarias. Boletin Geologico y Minero, 134 (3), 49-58. doi: 10.21701/bolgeomin/134.3/004

Mitjanas, G., Ledo, J., Macau, A., Alías, G., Queralt, P., Bellmunt, F., Rivero, Ll., Gabàs, A., Marcuello, A., Benjumea, B., Martí, A. and Figueras, S. (2021). Integrated seismic ambient noise, magnetotellurics and gravity data for the 2D interpretation of the Vallès basin structure in the geothermal system of La Garriga-Samalús (NE Spain). Geothermics, 93 102067, 1-14. doi: 10.1016/j.geothermics.2021.102067

Conference Papers

Marcuello, A., Marsal, S., Campanya, J., Queralt, P., Torta, J.M., Estrany, J.M., Pina-Varas, P., Curto, J.J., Marti, A., Mitjanas, G., Hafizi, R. and Ledo, J. (2022). Indirect measurement of Geomagnetically Induced Currents. 10th Spanish-Portuguese Assembly of Geodesy and Geophysics, Toledo, Spain, 28 November - 1 December 2022.

Hafizi, R., Marti, A., Marcuello, A., Pina-Varas, P., Mitjanas, G., Queralt, P., Campanya, J., Ledo, J., Torta, J.M. and Marsali, S. (2022). Modelling induced electric fields in the Iberian Peninsula for different geomagnetic storm scenarios.. 10th Spanish-Portuguese Assembly of Geodesy and Geophysics, Toledo, Spain, 28 November - 1 December 2022.

Marti, A., Queralt, P., Marcuello, A., Ledo, J. and Mitjanas, G. (2022). Magnetotelluric characterization of th Garraf landfill (NE Spain). 10th Spanish-Portuguese Assembly of Geodesy and Geophysics, Toledo, Spain, 28 November - 1 December 2022.

Mitjanas, G., Ledo, J., Queralt, P., Piña-Varas, P. and Martí, A. (2022). Integration of magnetotelluric data with ambient seismic noise and gravity models in order to characterize geothermal fault-controlled systems. The Vallès Basin case of study (NE Spain). EMIW2022 – XXV Electromagnetic Induction Workshop, Çeşme, Turkey, 11-17 September 2022.

Martí, A., Queralt, P., Marcuello, Al., Ledo, J., Mitjanas, G., Piña-Varas, P., Freixes, A., Solà, J. and Pons, P. (2022). Characterization of a landfill using magnetotellurics: the Garraf case. EMIW2022 – XXV Electromagnetic Induction Workshop, Çeşme, Turkey, 11-17 September 2022.

Hafizi, R., Martí, A, Piña-Varas, P., Mitjanas, G., Campanyà, J., Marcuello, A., Ledo, J. and Queralt, P. (2022). Calculating geoelectric fields using a lithospheric resistivity model of the Iberian Peninsula. EMIW2022 – XXV Electromagnetic Induction Workshop, Çeşme, Turkey, 11-17 September 2022.

Mitjanas, G. (2022). The importance of structural complexity in locations of geothermal systems: a case of study in the Catalan Coastal Ranges (NE Spain). WS05 Innovation on exploration and exploitation of geothermal energy (EAGE Annual 2022), Madrid, Spain, 5 June 2022.

Mitjanas, G., Piña-Varas, P., Ledo, J., Queralt, P. and Martí, A. (2022). Geophysical and geological characterization of geothermal fault-controlled systems. The Valles Basin case of study (NE Spain). EAGE ANNUAL – 83rd Conference & Exhibition, Madrid, Spain, 4-10 June, 2022.

Queralt, P., Ledo, J., Marcuello, A., Mitjanas, G., Alias, G., Pina-Varas, P. and Marti, A. (2021). MT, CSEM and Gravity joint interpretation for a geothermal study in the Valles Basin (Catalan Coastal Ranges, NE Spain). World Geothermal Congress 2020+1, Reykjavik, Iceland, 24-27 October 2021.

Ledo, G., Pina-Varas, P., Slezak, K., Garcia-Merino, M., Di Paolo, F., Martinez-Van Dorth, D., Perez, N. M., Queralt, P., Marcuello, A. and Mitjanas, G. (2021). Electrical resistivity time evolution of volcanic islands: Gran Canaria, Tenerife and La Palma islands (Spain). World Geothermal Congress 2020+1, Reykjavik, Iceland, 24-27 October 2021.

Del Val, L., Mitjanas, G., Ledo, J. and Queralt, P. (2021). Interdisciplinary Characterization Of La Garriga‐Samalus (Barcelona, Spain) Fault‐Controlled Geothermal System. 48th IAH Congress, Brussels, Belgium, 6-10 September 2021. IAH.

Mitjanas, G., Alías, G., García-Martínez, D., Queralt, P. and Ledo, J. (2021). Multiscale fracture analysis of the Valles fault zone in La Garriga-Samalus geothermal system. vEGU General Assembly 2021, Vienna, Austria, 26-30 April, 2021. doi: 10.5194/egusphere-egu21-9940

Mitjanas, G. (2021). The Valles Basin Geothermal System in the frame of the GEO-URBAN project. European Geothermal PhD Days 2021, Paris, France, 15-17 February 2021.

Mitjanas, G., Alias, G., Queralt, P., Ledo, J., Del Val, L., Garcia-Martinez, D., Pina-Varas, P. and Marti, A. (2021). The role of crustal faults, relay ramps, and the intersection of fractures in crystalline geothermal reservoirs. Identification and characterization by geophysical prospection and multiscale fracture analysis in the Vallès basin (NE Spain).. Der Geothermie Kongress 2021, Haus der Technik, Essen, 30 November - 2 December 2021.

Castillo-Reyes, O., Queralt, P., Ledo, J., Marcuello, A., Mitjanas, G. and De La Puente, J. (2020). Control Source Electromagnetic test in the Vallès Basin (Spain) for geothermal characterization: experiment setup and numerical simulations. AGU Fall Meeting 2020, Online, 1-17 December 2020.

Mitjanas, G., Ledo, J., Queralt, P., Alías, G., Piña-Varas, P., Marcuello, A. and Martí, A. (2020). Integration of geophysical methods and fractures study for the Vallès geothermal system characterization (NE Spain). EGU General Assembly 2020, Vienna, Austria, 4-8 May 2020. doi: 10.5194/egusphere-egu2020-6769

Ledo, J., Queralt, P., Marcuello, A., Martí, A., Pous, J., Santos, F., Campanyà, J., Piña-Varas, P. and Mitjanas, G. (2019). Electrical lithosphere of the Iberian Peninsula: integrating existing magnetotelluric databases and models.. EGU General Assembly 2019, Vienna, Austria, 7-12 April 2019. Munich, Germany: European Geosciences Union.

Queralt, P., Ledo, J., Marcuello, A. and Mitjanas, G. (2018). CSEM experiment and MT-CSEM 2D joint inversion for a geothermal study in the Vallès Basin (Catalan Coastal Ranges, NE Spain). 24th EM Induction Workshop, Helsingør, Denmark, 13-20 August 2018.

Research Reports

Mitjanas, Gemma and Micklethwaite, Steve (2023). From Fold to Gold: Reinterpretation, 3D Visualization and Mineral Systems Analysis of Pine Creek, Northern Territory. Report 2. Brisbane, QLD Australia: The University of Queensland.

Mitjanas, Gemma and Micklethwaite, Steve (2023). From Fold to Gold: Reinterpretation, 3D Visualisation and Mineral Systems Analysis of Pine Creek, Northern Territory. REPORT 1. Northern Territory Geological Survey: Northern Territory Geological Survey.