Parnell, J., Perez, M., Armstrong, J., Bullock, L., Feldmann, J. and Boyce, A.J. (2017) A black shale protolith for gold-tellurium mineralisation in the Dalradian Supergroup (Neoproterozoic) of Britain and Ireland. Transactions of the Institution of Mining and Metallurgy Section B: Applied Earth Science, 126(4), pp. 161-175. (doi: 10.1080/03717453.2017.1404682)
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Abstract
The Dalradian Supergroup of Britain and Ireland is mineralised by gold-tellurium vein deposits. The host succession includes carbonaceous, pyritic shales (pelites) which were a source of trace elements, including gold and tellurium. LA-ICP-MS mapping of pyrite crystals shows that late stages are enriched in gold, tellurium and lead, representing concentration of these elements during metamorphism and related hydrothermal activity. The sulphur isotope composition of the pyrite varies with stratigraphic position, reflecting an origin for the pyrite in the depositional environment through microbial sulphate reduction. Where pyrite was converted to pyrrhotite, trace element contents are much lower, indicating element liberation during metamorphism. These observations are consistent with a model of black shale protoliths for orogenic gold deposits.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was supported by the NERC under Grant number NE/L001764/1. AJB is funded by NERC support of the Isotope Community Support Facility at SUERC. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Boyce, Professor Adrian |
| Authors: | Parnell, J., Perez, M., Armstrong, J., Bullock, L., Feldmann, J., and Boyce, A.J. |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Transactions of the Institution of Mining and Metallurgy Section B: Applied Earth Science |
| Publisher: | Taylor & Francis |
| ISSN: | 0371-7453 |
| ISSN (Online): | 1743-2758 |
| Published Online: | 30 November 2017 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Transactions of the Institution of Mining and Metallurgy Section B: Applied Earth Science 126(4):161-175 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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