414 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
The principal ore is calaverite, occurring as usual, coating narrow seams in 
the vein, but also to some extent as replacement. In the lower levels tetrahedrite 
began to appear, especially in the 
“B” or shaft vein, from a point 
850 feet below the collar to the 
bottom. This vein generally as- 
saj^s comparatively high in silver. 
Gold accompanies the tetrahe¬ 
drite, but this particular ore is not 
of high grade. Assays gave, for 
instance, gold, $8; silver, 8.5 oun¬ 
ces; copper, 0.2 per cent. Galena 
occurred in the “C” or Winze 
vein; on level 9 a mass was 
found 1§ feet wide, consisting of 
galena, zinc blende, and pyrites, 
with good values of gold. Simi¬ 
lar ore occurred on the “ D ” vein, 
250 feet south of the shaft. On 
the other hand, the breccia’ close 
to the vein on level 7, at the Vindi¬ 
cator boundary line, contained 
much massive pyrite and zinc 
blende which proved practically 
barren. On' the same level a 
seam with much stibnite oc¬ 
curred. Molybdenite occurs fre¬ 
quently in the ore. Partial oxi¬ 
dation extends at least 850 feet 
below the collar. 
T‘ 
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1 st level 
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ndl level 
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4 th level 
Dike, 
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l 5 th 
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6 th level 
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10 th /eve/ 
ORE SHOOTS. 
The stopes on the “C” vein 
were very large and extended 
from near the surface to level 4, 
and in places somewhat below 
it. Three hundred feet below the 
surface the maximum horizontal 
length of 600 feet was attained, 
and the shoot practically con¬ 
nected with the south body of 
the Findley mine. Smaller stopes 
down to level 10 were opened on 
the Winze vein, which is as¬ 
sumed to be the “C” vein after having crossed over to the west side of the dike. 
On the lower levels the most important ore body occurred on the ‘‘D” vein, lying 
Scale 
0 
i_ 
200 
i 
400 feet 
j 
Fig. 50. —Cross section of Hull City mine, looking northwest (after 
F. G. Willis). 
