Cornish Metals lifts resource estimates at iconic South Crofty tin mine "This new mineral resource estimate confirms our belief in the resource expansion potential at South Crofty,” said chief executive Richard Williams Cornish Metals Inc. (LON:CUSN, TSX-V:CUSN) announced an increase in resource estimates at the iconic South Crofty tin mine in Cornwall. An updated mineral resource estimate (MRE) showed a 10% increase in indicated resources in both the lower mine and upper mine areas and an almost 130% gain in inferred resources at the lower mine. The JORC-compliant MRE was divided into the...