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Dr Olivia Mejías González
Dr

Olivia Mejías González

Email: 
Phone: 
+61 7 344 35119

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

36 works between 2013 and 2026

1 - 20 of 36 works

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

Resolving indium mobility and transformation in mining-impacted environments through multi-scale characterisation

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

Examining critical metals in Australia’s non-ferrous slag: insights from integrated characterisation techniques

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

Fate, distribution, and transport dynamics of indium in a polymetallic mine waste environment: An integrated mineralogical characterisation and geochemical modelling study

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:

Process Mineralogy of Historical Sn Mine Waste: Recovery of W, In, and Sn from the Herberton Mineral Field, 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.

Meso-scale imaging and whole-rock quantification of indium in mine waste from a granite-related deposit using laser-induced breakdown spectroscopy (LIBS)

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.

Selective Bioleaching of Critical and Precious Metals from Northern Queensland Mine Waste Using Indigenous Bacteria

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.

Mt Isa Critical Minerals and Rare Earth Elements Research Centre

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.

Indium in mine wastes: geochemistry, mineralogy, and microbiology

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.

Indium cycling and mobility in mine waste and acid mine drainage environments

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.

MapsMin analysis of fine-grained indium-rich minerals in Baal Gammon waste rock

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.

A review of the mineral chemistry of pyrite and magnetite: a potential source for critical elements by-products in Chile

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.

Cobalt and other critical metals in tailings of major mineral deposits in north Queensland: Mt Morgan waste rock study

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

Indium in ore deposits and mine waste environments: Geochemistry, mineralogy, and opportunities for recovery

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

Exploration for critical metals in Australia’s mine waste to support the energy transition

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.

Indium in Australia: exploration in NE Queensland’s mine waste

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.

Tracking indium in sulfidic mine waste and acid mine drainage environments

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.

Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of Laser-Induced Breakdown Spectroscopy

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).

Exploration of indium in sulfidic mine waste and acid mine drainage environments

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.

Indium-bearing minerals and textures of drill core samples from Baal Gammon mine: an application of laser induced breakdown spectroscopy

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.

Workflows for evaluating critical metals using handheld LIBS

Funding

Past funding

  • 2026
    Unlocking Critical Metals from Legacy Mine Waste: Bismuth Characterisation and Recovery Pathways Using Synchrotron XFM
    Australian Nuclear Science and Technology Organisation
    Open grant
  • 2026
    Unravelling the mechanisms of critical mineral indium incorporation in chalcopyrite (XAS-Mode X): Implications for mineral processing
    Australian Nuclear Science and Technology Organisation
    Open grant
  • 2025
    Unravelling the mechanisms of critical mineral indium incorporation in chalcopyrite (XAS-Mode Y): Implications for mineral processing
    Australian Nuclear Science and Technology Organisation
    Open grant
  • 2025
    Unlocking indium in complex tin-rich mine wastes: a first step toward designing a remining process
    Australian Nuclear Science and Technology Organisation
    Open grant
  • 2023
    Understanding cycling of indium in mine waste systems: transforming waste into a critical resource
    Australian Nuclear Science and Technology Organisation
    Open grant

Supervision

Availability

Dr Olivia Mejías González is:
Available for supervision

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Supervision history

Current supervision

Media

Enquiries

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