gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.058.390.04 Mineralogy Bismuth Sulphosalts Within Quartz Veining Hosted by the Loch Shin Monzogranite, Scotland Lowry D. * Stephens W. E. Herd D. A. Department of Geography and Geology, Geology Division, University of St. Andrews, Fife KY16 9ST, UK Stanley C. J. Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK

Present address: Department of Geology, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK

 3 1994 58 390 39 47 20 10 1992 2 6 1993 Copyright © 1994, The Mineralogical Society 1994 Abstract

The Loch Shin monzogranite is host to quartz veins bearing the sulphosalts aikinite, hammarite, lindströmite, krupkaite, gladite and pekoite, which belong to the aikinite-bismuthinite series, and represents the first significant occurrence of this series in the United Kingdom. Inclusions of the sulphotelluride tetradymite occur in krupkaite-gladite. Berryite is present as inclusions in chalcopyrite. Electron microprobe analyses reveal a range of compositions in individual crystal masses from hammarite to krupkaite in one sample, and from krupkaite to gladite in a second. Compositions between friedrichite and hammarite and gladite and pekoite are notably absent.

 Keywords Bismuth sulphosalts aikinite-bismuthinite series Caledonian intrusives Loch Shin Scotland microprobe data X-ray powder diffraction