A sulphur isotopic investigation of the potential sulphur sources for lower Palaeozoic-hosted vein mineralization in the English Lake District

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doi: 10.1144/gsjgs.148.6.0993
Authors:Lowry, D.; Boyce, A. J.; Pattrick, R. A. D.; Fallick, A. E.; Stanley, C. J.
Author Affiliations:Primary:
University of St. Andrews, Department of Geography & Geology, Fife, United Kingdom
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.148 (Part 6), p.993-1004. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1991
Note:In English. 56 refs.; illus. incl. 2 tables, geol. sketch maps
Summary:The Ordovician Skiddaw group is a reservoir of isotopically heavy sulphur with a range of delta34S from +11 to +29 per mille ; four analyses of Borrowdale Volcanic group rocks gave values of +1 to +15 per mille . Such positive values are thought to be the result of closed system bacteriogenic reduction of Ordovician sea- water sulphate in the case of the Skiddaw group and mixing of mantle-derived magmatic sulphur with Ordovician sea-water sulphate for the Borrowdale Volcanic rocks. Although the Lake District batholith provided a heat source for the Cu-Fe-As vein mineralization, the granite did not supply any sulphur to those systems. Magmatic sulphur, however, was an important constituent in mineralization associated with the Shap and Skiddaw granites; the delta34S values for baryte mineralization at Force Grag, Greenside, Skiddaw and Shap ranges from +13 to +18 per mille, and Carboniferous sea-water provides the most reasonable source for sulphate. [R.A.H.]
Subjects:Arsenic ores; Barite deposits; Carboniferous; Copper ores; Devonian; Epigene processes; Host rocks; Hydrothermal alteration; Iron ores; Isotope ratios; Isotopes; Lead-zinc deposits; Lower Paleozoic; Metal ores; Metasomatism; Mineral deposits, genesis; Mineralization; Ordovician; Paleozoic; Permian; S-34/S-32; Skiddaw Slates; Stable isotopes; Sulfur; Veins; Cumbria England; England; Europe; Great Britain; Lake District; United Kingdom; Western Europe; Hydrothermal processes
Coordinates:N540500 N551500 W0021000 W0034000
Abstract Numbers:92M/1659
Record ID:1993027669
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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