Area: 1.0 hectares.
In Dartmoor National Park. A new site.
Description and Reasons for Notification:
A large dump in the wood on the south side of the River Tavy marks the site of the shaft of North Mine. The mine was principally a copper producer but the veinstone on the dump contains mainly arsenopyrite and cassiterite. Of far more interest is a smaller dump to the west. Recent digging has here exposed samples of quartz vein with abundant scheelite and native bismuth and crystalline arsenopyrite of excellent quality. The mineralisation is fairly typical of the tin/copper zone boundary except that echeclite develops in calcareous rocks rather than wolframite.