The Mineral Resources of Greenland. 45 
More or less flake graphite occurs in the gneisses for a distance of 830 m 
(2 700 feet) across the strike and the Augpilatuarsuk (15 miles east) 
graphite deposit is probably on an extension of the same belt. 
In the bed of Utokrat stream are two major shear zones in which 
vein-like bodies of amorphous graphite occur, the softness of these 
zones doubtless determining the position of the valley. The gneisses 
dip north 60° to 70° and the graphite vein-like lenses have the same 
dip. The more northerly and larger vein has as a foot-wall pegmatite 
and, as a hanging wall, a thin band of sillimanite-garnet schistose gneiss, 
containing a little pyrite (Fig. 19). The walls are well-defined and 
Fig. 19. Cross section of pit on minor graphite »vein« Utokrat. 
1. Granite gneiss containing a little flake graphite. 2. Barren granite gneiss. 3. Pegmatitic quartz. 4. Iron- 
stained earthy graphite. 5. Granite gneiss with about 50°, graphite flake 1/, inch long. 6. Granite gneiss 
with a few graphite flakes 1/, inch long. 7. Granite gneiss with silimanite on gneissic planes. 8. Siliceous 
graphite slickensided into nodular aggregates of very finely platy graphite. 9. Granite gneiss containing a 
little flake graphite. 10. Pegmatite containing about 10°/, of graphite. 11. Granite gneiss with about 5°/o 
of graphite flakes 1/4 inch long. 12. Pegmatite containing graphite flakes 1/4 inch in diameter. 13. Granite 
gneiss with a few graphite flakes 1/4, inch long. 
comparatively little graphite penetrates them. The open cuts expose 
the tabular graphite body discontinuously for 145 m (475 feet). The 
more easterly 116m (380 feet) graphite thus exposed is from 0.5m 
(1175) to 3.25 m (10 feet) thick; the more westerly workings, on the 
other hand, expose а narrow streak of graphite. The strength of the 
fracture indicates that it will presumably continue to at least fair depth. 
The minor vein is from 8—11 m (25 to 35 feet) north of the major 
vein, and pits upon it for 100 m (325 feet) show from 1 to 4 narrow 
discontinuous veins of graphite, from 0.025 to 0.6 m (1 inch to 2 feet) 
thick. The granite gneiss forming the walls contains a fair amount of 
graphite, approaching in narrow bands 50 percent. The flake graphite 
extends farther into the hanging- than into the foot-wall and, as the 
graphite vein 13 approached, the flakes increase from 0.15 cm to 0.6 cm 
