WULFENITE FROM ROAR HILL, BALLATER, ABERDEENSHIRE: A NEW SCOTTISH LOCALITY

摘要

Recent groundwork at Roar Hill, on the eastern edge of the Cairngorms National Park in Aberdeenshire, has exposed veins containing baryte, cerussite, fluorite, galena, mimetite, pyromorphite and sphalerite. Wulfenite occurs as orange-red crystals ranging from sharply pointed 'spires' and equant bipyramids to rare octagonal tablets. The mineralisation is the product of supergene alteration of sparse base-metal sulphides associated with quartz-fluorite veins in the Ballater Granite.