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Mineral investigations near Bodmin, Cornwall. Part 4, drilling at Royalton Farm

By K.E. Beer, K. Turton and T.K. Ball


Fourteen inclined percussive drillholes have shown that weak tin\ud mineralisation persists into the hangingwall slates of the Royalton elvan\ud for a distance of at least 50 m. Geochemically anomalous tin values are\ud recorded along the full strike length of the former opencast workings of the\ud Old Castle-an-Dinas Mine, but the richest concentrations are found near the\ud western, circular-shaped pit. Even here, the grades rarely reach\ud economically interesting levels, and then only over intervals of 1.5 m.\ud Immediately east of the openworks there is a marked enrichment in copper and\ud nickel, but at levels well below those of economic significance

Topics: Earth Sciences
Publisher: British Geological Survey
Year: 1986
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