Overview
Background
Dr Olivia Mejías González is the group leader of the Mine Waste Transformation through Characterisation (MIWATCH) group at the W. H. Bryan Mining and Geology Research Centre (BRC) within the Sustainable Minerals Institute (SMI), and Research Fellow in the ARC Training Centre for Critical Resources for the Future (CCRF).
Olivia is a geologist/geometallurgist (MSc, PhD) with 14 years of combined industry and research experience, including her PhD research, applying geochemical and mineralogical characterisation throughout the mining value chain, from exploration and production geology to geometallurgy, across both ore and mine waste materials.
Throughout these years, she has gained valuable experience leading, developing, and applying geometallurgical approaches to Cu-Mo porphyry ores; advancing geochemical studies in Co-rich IOCG systems; and understanding the biogeochemical cycling of In in anthropogenic environments and its implications from a resource-recovery and environmental perspective, particularly in mine wastes derived from Cu-Sn granite-related and Cu-Au VMS deposits, and surrounding creek systems.
She has been growing her expertise across a range of analytical techniques, including LIBS, automated mineralogy (QEMSCAN, MLA and MAPS Mineralogy), LA-ICP-MS, synchrotron-based XFM and XAS, atom probe tomography, and geochemical modelling.
Olivia is a dedicated and collaborative researcher who is passionate about characterising mine waste materials, with a focus on identifying potential metals, critical minerals, and other recoverable products to support sustainable mine waste reprocessing, using an industry-driven research approach to make outcomes transferable and applicable. If you are interested in these topics and keen to collaborate or explore research and industry problem-solving opportunities together, please get in touch!
Availability
- Dr Olivia Mejías González is:
- Available for supervision
Qualifications
- Doctor of Philosophy of Geochemistry, The University of Queensland
Works
Search Professor Olivia Mejías González’s works on UQ eSpace
2026
Other Outputs
Resolving indium mobility and transformation in mining-impacted environments through multi-scale characterisation
Mejías, Olivia (2026). Resolving indium mobility and transformation in mining-impacted environments through multi-scale characterisation. PhD Thesis, Sustainable Minerals Institute, The University of Queensland. doi: 10.14264/6b87f4a
2026
Conference Publication
Examining critical metals in Australia’s non-ferrous slag: insights from integrated characterisation techniques
Kng, Lexi, Gomes, Allan S., Jackson, Laura, Nascimento, Sibele, Sharma, Dipanshu, Gan, Princess Rochelle, Mejías, Olivia, Blannin, Rosie and Parbhakar-Fox, Anita (2026). Examining critical metals in Australia’s non-ferrous slag: insights from integrated characterisation techniques. 155th Minerals Metals and Materials Society Meeting-TMS-Annual, San Diego, CA, United States, 15-19 March 2026. Cham, Switzerland: Springer Cham. doi: 10.1007/978-3-032-13596-4_28
2025
Journal Article
Fate, distribution, and transport dynamics of indium in a polymetallic mine waste environment: An integrated mineralogical characterisation and geochemical modelling study
Mejías, Olivia, Poulet, Thomas, Behnoudfar, Pouria, Jackson, Laura, Freeman, Justin, Jones, Thomas Ray, Howard, Daryl L. and Parbhakar-Fox, Anita (2025). Fate, distribution, and transport dynamics of indium in a polymetallic mine waste environment: An integrated mineralogical characterisation and geochemical modelling study. Science of the Total Environment, 998 180268, 1-17. doi: 10.1016/j.scitotenv.2025.180268
2025
Conference Publication
Process Mineralogy of Historical Sn Mine Waste: Recovery of W, In, and Sn from the Herberton Mineral Field, Australia
Chingwaru, Steve Jason, Mejías, Olivia, Parbhakar-Fox, Anita and Blannin, Rosie (2025). Process Mineralogy of Historical Sn Mine Waste: Recovery of W, In, and Sn from the Herberton Mineral Field, Australia. Society of Economic Geology, Brisbane, QLD, Australia, 26-29 September 2025. Brisbane, QLD, Australia:
2025
Conference Publication
Meso-scale imaging and whole-rock quantification of indium in mine waste from a granite-related deposit using laser-induced breakdown spectroscopy (LIBS)
Mejías, Olivia, Fayad, Alejandro, Narbey, Melissa, Valenzuela, Martin and Parbhakar Fox, Anita (2025). Meso-scale imaging and whole-rock quantification of indium in mine waste from a granite-related deposit using laser-induced breakdown spectroscopy (LIBS). Society of Economic Geologists (SEG) Conference 2025, Brisbane, QLD Australia, 26 - 29 September 2025. Littleton, CO United States: Society of Economic Geologists.
2025
Conference Publication
Selective Bioleaching of Critical and Precious Metals from Northern Queensland Mine Waste Using Indigenous Bacteria
Ansah, Eric O., Gunathunga, Samadhi U., Yadollahi, Ali, Curi Rivera, Pamela, Mejías, Olivia, Southam, Gordon and Parbhakar-Fox, Anita (2025). Selective Bioleaching of Critical and Precious Metals from Northern Queensland Mine Waste Using Indigenous Bacteria. SEG 2025, Brisbane, QLD, Australia, 26-29 September 2025.
2024
Other Outputs
Mt Isa Critical Minerals and Rare Earth Elements Research Centre
Forbes, Liza, Evans, Tom, Nell, Kristy, Parbhakar-Fox, Anita, Blannin, Rosie, Arslan, Unzile Yenial, Mejias, Olivia, Anasah, Eric O. and Valenta, Rick (2024). Mt Isa Critical Minerals and Rare Earth Elements Research Centre. Brisbane, QLD Australia: Sustainable Minerals Institute.
2024
Conference Publication
Indium in mine wastes: geochemistry, mineralogy, and microbiology
Mejías, Olivia, Jackson, Laura and Parbhakar-Fox, Anita (2024). Indium in mine wastes: geochemistry, mineralogy, and microbiology. SEG 2024 Conference: Sustainable Mineral Exploration and Development, Windhoek, Namibia, 27-30 September 2024.
2024
Conference Publication
Indium cycling and mobility in mine waste and acid mine drainage environments
Mejías, Olivia, Parbhakar-Fox, Anita and Jackson, Laura (2024). Indium cycling and mobility in mine waste and acid mine drainage environments. Australian Mine Waste Symposium (AMWS), Brisbane, QLD Australia, 6-7 February 2024.
2024
Conference Publication
MapsMin analysis of fine-grained indium-rich minerals in Baal Gammon waste rock
Freeman, Justin and Mejías, Olivia (2024). MapsMin analysis of fine-grained indium-rich minerals in Baal Gammon waste rock. 16th Australian Microbeam Analysis Society Symposium (AMAS), Brisbane, QLD Australia, 5-9 February 2024.
2023
Conference Publication
A review of the mineral chemistry of pyrite and magnetite: a potential source for critical elements by-products in Chile
Mejías, Olivia, Quevedo, Javier and Townley, Brian (2023). A review of the mineral chemistry of pyrite and magnetite: a potential source for critical elements by-products in Chile. XVI Chilean Geological Congress, Santiago, Chile, 26 November-1 December 2023.
2023
Other Outputs
Cobalt and other critical metals in tailings of major mineral deposits in north Queensland: Mt Morgan waste rock study
Mejías, Olivia, Jackson, Laura and Parbhakar-Fox, Anita (2023). Cobalt and other critical metals in tailings of major mineral deposits in north Queensland: Mt Morgan waste rock study. St Lucia, QLD Australia: University of Queensland.
2023
Journal Article
Indium in ore deposits and mine waste environments: Geochemistry, mineralogy, and opportunities for recovery
Mejías, Olivia, Parbhakar-Fox, Anita, Jackson, Laura, Valenta, Rick and Townley, Brian (2023). Indium in ore deposits and mine waste environments: Geochemistry, mineralogy, and opportunities for recovery. Journal of Geochemical Exploration, 255 107312, 1-26. doi: 10.1016/j.gexplo.2023.107312
2023
Conference Publication
Exploration for critical metals in Australia’s mine waste to support the energy transition
Parbhakar-Fox, Anita, Jackson, Laura, Bhowany, Kamini, Guerin, Kristy, Han, Zhengdong, Blannin, Rosie, Moyo, Annah, Nicholls, Loren and Mejias, Olivia (2023). Exploration for critical metals in Australia’s mine waste to support the energy transition. Goldschmidt2023, Lyon, France, 9-14 July 2023. Paris, France: European Association of Geochemistry. doi: 10.7185/gold2023.18999
2023
Conference Publication
Indium in Australia: exploration in NE Queensland’s mine waste
Mejías, Olivia, Parbhakar-Fox, Anita and Jackson, Laura (2023). Indium in Australia: exploration in NE Queensland’s mine waste. 26th World Mining Conference (WMC), Brisbane, QLD Australia, 26-29 June 2023.
2023
Conference Publication
Tracking indium in sulfidic mine waste and acid mine drainage environments
Mejías, Olivia, Jackson, Laura, Parbhakar-Fox, Anita, Salazar, Leonardo and Jaime, Patricio (2023). Tracking indium in sulfidic mine waste and acid mine drainage environments. CRITCON: Discovery, Characterisation and Processing of Critical Minerals, Adelaide, SA Australia, 22-26 May 2023.
2023
Conference Publication
Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of Laser-Induced Breakdown Spectroscopy
Mejías, Olivia, Valenzuela, Martin, Parbhakar-Fox, Anita and Jackson, Laura (2023). Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of Laser-Induced Breakdown Spectroscopy. CRITCON: Discovery, Characterisation and Processing of Critical Minerals, Adelaide, SA Australia, 22-26 May 2023.
2023
Conference Publication
Exploration of indium in sulfidic mine waste and acid mine drainage environments
Mejias, Olivia, Jackson, Laura and Parbhakar-Fox, Anita (2023). Exploration of indium in sulfidic mine waste and acid mine drainage environments. 17th Biennial Meeting of the Society-for-Geology-Applied-to-Mineral Deposits (SGA) on Mineral Resources in a Changing World, Zurich, Switzerland, 28 August - 1 September 2023. Geneva, Switzerland: The Society for Geology Applied to Mineral Deposits (SGA).
2022
Conference Publication
Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of laser induced breakdown spectroscopy
Mejías, Olivia (2022). Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of laser induced breakdown spectroscopy. Digging Deeper Workshop, Brisbane, QLD Australia, 7-8 December 2022.
2022
Conference Publication
Workflows for evaluating critical metals using handheld LIBS
Mejías, Olivia, Valenzuela, Martin, Parbhakar-Fox, Anita, Townley, Brian, Jackson, Laura and Fox, Nathan (2022). Workflows for evaluating critical metals using handheld LIBS. XII World Conference On Laser Induced Breakdown Spectroscopy, Italy, 5-9 September 2022.
Funding
Past funding
Supervision
Availability
- Dr Olivia Mejías González is:
- Available for supervision
Looking for a supervisor? Read our advice on how to choose a supervisor.
Supervision history
Current supervision
-
Doctor Philosophy
Unravelling novel sulphide transformation pathways for critical metal recovery
Associate Advisor
Other advisors: Dr Xiaodong Ma, Honorary Professor Anita Parbhakar-Fox
-
Doctor Philosophy
Building Geospatial Models to Inform Critical Mineral Extraction from Mine Waste: Towards a New Industry Standard
Associate Advisor
Other advisors: Honorary Professor Anita Parbhakar-Fox
Media
Enquiries
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