Mineral investigations near Bodmin, Cornwall. Part 3, the Mulberry and Wheal Prosper area

Investigations in the area between the former opencast
tin workings of Mulberry and Wheal Prosper
suggest that the most promising ground for future
mineral exploration lies to the south of the latter
workings. The north-south Mulberry mineralisation
trend, although recognisable south of the calcsilicate
belt, gives rise to only sporadic and lowamplitude
tin anomalies in the soils. Near to the
surface there is no evidence of an analogue of the
Mulberry deposit; its existence or absence at depth
could only be proved by speculative drilling.
Traced westwards, the Prosper mineralisation
becomes more tenuous and, at shallow depth, uneconomic.
Strong geochemical evidence, supported by less
f’lrm geophysical indications, points to the presence
of a previously unrecognised mineralised zone subparallel
to the Prosper vein sheets and some 200 m
south of them. The presence of tin, copper, zinc
and a little tungsten is indicated.