Fluid inclusion and stable isotope study of fault-related mineralization in Tyndrum area, Scotland

Curtis, S., Pattrick, R., Jenkin, G., Fallick, A.E., Boyce, A.J. and Treagus, J.E. (1993) Fluid inclusion and stable isotope study of fault-related mineralization in Tyndrum area, Scotland. Transactions of the Institution of Mining and Metallurgy Section B: Applied Earth Science, 102, B39-B47.

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Abstract

Gold-bearing structures in the Tyndrum area, Scotland, formed from CO2-bearing fluids that contained 6 equiv. wt% NaCl at temperatures in the range 290-350-degrees-C. Loss of CO2 (phase separation) from the fluids was one cause of mineral precipitation. Oxygen and hydrogen isotopic data suggest that the fluids were magmatic in origin but included an additional component-probably Lower Devonian meteoric water. Sulphur isotopic ratios indicate two sources of sulphur, one magmatic in character and the other the country rocks. In contrast, historically exploited base-metal veins in the area formed from highly saline (approximately 15 equiv. wt% NaCl), relatively low-temperature (140-200-degrees-C) fluids, which have a different stable isotopic signature from that of the gold veins. Comparison with information from other mineralization in the region suggests that the genesis of the Tyndrum gold veins is related to Caledonian magmatism; the mineralizing fluids could have evolved from an underlying magma that was either granitic or appinitic.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Boyce, Professor Adrian and Fallick, Professor Anthony
Authors: Curtis, S., Pattrick, R., Jenkin, G., Fallick, A.E., Boyce, A.J., and Treagus, J.E.
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:Maney Publishing
ISSN:0371-7453
ISSN (Online):1743-2758

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