Characterisation of the newly identified porphyry gold mineralisation in Glen Garry area, Scotland
Summary
- Investigate a newly discovered porphyry mineralisation
- Field work in Central Scottish Highlands
- Experience in a multi-method approach to characterise a mineralised system
Background
Fieldwork by Leeds researchers during 2024-2025 revealed a previously-unreported mineralised area in central Scotland. Multiple, sulphide-bearing veins, up to 20 cm thick and associated with intense potassic alteration, have been identified across a geographically extensive area. Samples collected contain major pyrite, minor galena and chalcopyrite, and possibly gold and silver. Sampling of alluvial particles near vein exposures has yielded gold, silver and gold-palladium, and preliminary electron microscope analysis of these with strongly indicates a magmatic-hydrothermal system. Observed features are typical of porphyry-epithermal systems, including potassic alteration, vein mineralogy, and silver and gold-platinum particles (e.g. Sillitoe, 2010). Past research suggests that gold mineralisation in nearby areas has a magmatic-hydrothermal origin (e.g. Chapman et al., 2023; Webb et al., 2025), but a possible northward extension of this system is new. We hypothesise a linkage to the post-Caledonian granitoid magmatism of the Grampian Highlands; specifically, to the Glen Tilt intrusive complex.
Project aims
The project aims at characterising the extent, style and origin of the vein mineralisation and their structural context. In order to achieve this, you will:
- Conduct extensive structural and alteration mapping;
- Perform mineralogical analysis of vein samples, including paragenetic interpretation;
- Characterise any gold present in vein samples (alloy compositions and inclusion suites);
- Conduct microgeochemical analyses of alluvial gold particles and compare the data with those obtained from in-situ gold particles.
Work will utilise a Scanning Electron Microscope, including Back-Scatter Electron, cathodoluminescence, and Electron Back-Scatter Diffraction imaging of textures. Energy Dispersive X-ray Spectrometry will characterise compositions. Electron Probe Micro Analyser work may be possible to further chemically characterise the phases present in the veins. Sulphur isotope analytical work will enable assessment of potential mineralizing fluid sources: bulk sulphur isotope data can be obtained at Leeds and in-situ sulphur isotope data can be accessed via the SUERC isotope laboratory in Glasgow. If samples are suitable, other relevant isotope systems (e.g. lead) or age determination may also assist in the characterisation. You will gain skills in structural analysis of field data and construct geological, structural and alteration maps using your own data.
Training
You will have access to the training within both YES.DTN and other relevant doctoral training networks (e.g. TARGET). The PhD study is equally suited to career pathways in academia or industry. Expected outputs of the project include the first detailed study of a novel mineralised area and, therefore, have potential for high-impact publications. At the same time, exposure to industry-relevant skills in exploration and ore geology provides non-academic vocational experience. You would also be expected to contribute to the activities of the Leeds Chapter of the Society of Economic Geology (SEG), with the associated benefits of networking across industry and academia.
Candidate specification
The successful candidate will have a 2:1 or higher (or overseas equivalent) from a previous degree in Geology, Earth Science or similar programme; an M-level qualification or relevant industry experience is advantageous, as is experience of publication or other relevant extra-curricular research activities. Excellent time management, critical thinking, field work and analytical skills, ability to collate, analyse and interpret multiple different datasets, and the ability to clearly communicate results are essential. Required existing subject-specific and technical skills can vary but you will benefit from being able to demonstrate experience in one or more of the following: base metal sulphide geochemistry; structural analysis; SEM or EPMA analyses; GIS; and/or other techniques directly relevant to the project.
Relevant papers
- Chapman et al., 2023, Minerals 13.
- Sillitoe, 2010, Econ. Geol. 105.
- Webb et al., 2025, Ore Geol. Rev. 181.