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Metalliferous mineralisation near Lutton, Ivybridge, Devon

By K.E. Beer, M.J. Bennett, T.K. Ball, R.C. Jones and K. Turton


To the north-west of Slade Hall localised uranium\ud and base metal mineralisation has been traced by\ud radiometric and geochemical soil surveys. It is\ud confmed to two narrow structures in a fault zone\ud trending NW-SE and at surface it has a strike\ud length of no more than 200 m. Percussive drilling\ud down to the shallow water table indicated\ud persistence of the secondary metalliferous minerals\ud but narrow diameter cored drilling failed to intersect\ud any recognisable well-mineralised structure at\ud a depth of only 50 m. It remains uncertain whether\ud a small ore shoot exists below the surface\ud anomalies; if so, it must be presumed to pitch\ud south-eastwards.\ud Only oxidised, and possibly enriched, mineralisation\ud has been sampled; this yielded a little\ud cassiterite, sphalerite, pyrite, pyrrhotite and\ud covellite, abundant hydrated iron and manganese\ud oxides with adsorbed uranium, lead, bismuth, zinc,\ud copper and arsenic, and flakes of secondary\ud uranium and silver minerals. Radiometry confirmed\ud gross uranium disequilibrium

Topics: Earth Sciences
Publisher: Institute of Geological Sciences
Year: 1981
OAI identifier:

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