It may suggest that, although it may be narrow in places, you only need 1.8m to shaft mine, and it looks as though the A-4 was around that on the 60m level or so. The Dynacor shafts that go into the side of the valley look to only be about that size.

There was one spot, around the A-7 vein, which the vein was barren, by the way, but the diorite there was mineralized to the extent of 2.2 g/t in one place. See below;

The northern part of the A7 swarm is within a zone of propylitic alteration in

brecciated and sheared diorite. Fourty-two trench samples of the altered diorite

with an average sample length of 3.0 meters returned an average grade of 250 ppb

gold within a north-northwesterly trending zone measuring 200 m by 50 m. The

highest-grade sample assayed 2.26 g/t gold across 3.0 m. Another chip sample

assayed 0.94 g/t gold across 7.5 m. This gold-anomalous alteration zone may be

of economic interest at a higher gold price.