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Report on geophysical and geological surveys at Blackmount, Argyllshire

By C.G. Smith and G.R. Marsden

Abstract

Blackmount, on the southern fringe of Rannoch Moor is\ud largely drift covered but, where exposed, the underlying\ud Precambrian Moine psammite contains granitic veins\ud which probably stem from the adjacent (Devonian) Moor\ud of Rannoch granite. These veins are generally pyritiferous\ud and, at one locality, carry small amounts of molybdenite.\ud Blackmount is also traversed by the Ericht-Laidon Fault,\ud which, in theory, and by analogy with a similar fault to\ud the south-east (the Tyndrum Fault), could be a site of\ud significant sulphide mineralisation. Magnetic, very low\ud frequency electro-magnetic (VLF EM), slingram EM and\ud induced polarisation measurements carried out in the area\ud of the veins suggest that the mineralisation has little or no\ud lateral or depth continuation. Similar surveys were\ud successful in locating the Ericht-Laidon Fault beneath\ud drift, but suggest no associated mineralisation down to the\ud greatest depth investigated

Publisher: Institute of Geological Sciences
Year: 1977
OAI identifier: oai:nora.nerc.ac.uk:10670

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