The Adams, Custer and Wonderful prospects are located at the headwaters of the Klehini River. This occurrence is skarn hosted.

Marble underlain and overlain by argillite and quartzite of probable Devonian to Upper Triassic age strikes northeast and dips steeply to the northwest. The sediments are intruded by diorite and quartz feldspar porphyry dykes and sills of Oligocene age. Minerali- zation, which is contemporaneous with the intrusives, occurs in skarn lenses along the carbonate-clastic contacts. Along the south-eastern contact skarn consisting of epidote, quartz, garnet and locally wollastonite, calcite and diopside ranges from 3 to 15 metres wide and can be traced for 230 metres. Sphalerite and galena lenses and bands occur irregularly along this horizon, ranging from 0.15 to 0.9 metres in width. Along the northwestern contact, wollastonite- garnet-epidote-calcite skarn extends for 140 metres and is irregularly mineralized with sulphide bands ranging from 0.15 to 0.45 metres in width. A sample from a 0.9 metre wide sulphide lens from the south- west contact assayed 10.2 per cent lead, 9.1 per cent zinc and 44.6 grams per tonne silver.