| Principal periods worked |
1883-1921, Int. 1922-44, 1952-59. |
| Workings |
3 adits, numerous drifts, stopes, in area 300 by 1,050. |
| Description of muscovite |
Ruby, minor cracking, bending, stain, mineral inclusions. |
| Production |
Large sheet |
| Shape |
Lenses |
| Size |
0.1-6 T, 5-50 L |
| Dip |
Pegmatite zone trends NW and dips NE. |
| Relation to wallrock |
Lenses are concordant |
| Wallrock |
Interlayered mica and hornblende gneiss, kyanite-garnet gneiss |
| Extent of weathering |
Unweathered |
| Remarks |
Q-M walls zone, medium to coarse grained; Pl(An 14)-Q-M core; accessory garnet, apatite, pyrrhotite. Lenses in zone 8 ft thick in gneiss. Zone cut by faults and basalt dike. |
| Source of information |
Olson (1944, p. 65-67), USGS, OF, DMEA. |
