254 ECONOMIC GEOLOGY OF SILVERTON QUADRANGLE, [bull. 182. 
upon the edges of the schists. The strike of the vein is N. 6° W., and 
it dips westerly at 78°. It varies in width from 18 inches to 4 feet, 
and is destitute of gouge. The inclosing schists strike N. 85° E., and 
their planes of schistosity stand nearly vertical. The vein thus crosses 
the schistosity nearly at right angles. No offsetting of the schists 
could be detected on opposite sides of the fissure. The King lode is 
faulted by a small vein dipping south about 50°, and the northern por- 
tion of the lode is thrown about 12 feet to the west. 
The ore of the King lode consists of galena, gray copper (probably 
termantite), and chalcopyrite, with some sphalerite and pyrite, in a 
quartz gangue. It carries about 0.1 ounce of gold, 55 ounces of silver, 
and 15 per cent of lead. 
Close to the King lode is a deposit of chalcopyrite, which occurs at 
the contact between the limestone and the underlying quartzite. 
This deposit is apparently directly connected with a fissure of rather 
flat southerly dip, which traverses both quartzite and limestone. 
The Moles mine, now abandoned, is on a nearly vertical fissure 
vein, about 2 feet wide, in limestone, chert, and shales of Devonian 
age. The vein strikes N. 72° W., and occupies a fault fissure. 
MINES OF CEMENT CREEK. 
General. — The ore deposits of Cement Creek occur in lodes, which 
in Ross Basin attain great prominence. The ores are prevailingly 
low grade, carrying silver and lead, or, as in the case of the Gold 
King mine, a large proportion of gold. The occurrence of hiibnerite, 
although it is not at present worked on a commercial scale, lends 
additional interest to the ore deposits of this portion of the quad- 
rangle. A few of the mines within the Cement Creek drainage have 
been described in connection with adjacent portions of the region, 
for, as elsewhere pointed out, the geographical grouping of the ore 
deposits of the quadrangle has no necessary significance beyond con- 
venience of description, and is accordingly not rigidly adhered to 
when other courses seem desirable. 
Gold King mine. — This property, with which are included the 
■Sampson and American mines, now under the same ownership, is by 
far the most important mine of the Cement Creek district. It lies on 
the western slope of Bonita Peak, with the present main adit tunnel 
at about 12,500 feet elevation. Two lodes are worked, termed, 
respectively, the Davis and Gold King. Both have a general north- 
east course, and on the main level are about 70 feet apart. The Gold 
King lode, which is the northwesterly one, dips southeast at about 
75° on the main level. The dip of the Davis is to the northwest, but 
nearty vertical. In the lower level, 107 feet below the adit, these 
lodes are closer together. Both are strong, typical stringer lodes with- 
out any gouge. So little have they been disturbed by post-mineral 
movements that there is practically no water in the mine. The ore 
