184 ECONOMIC GEOLOGY OF SILVERTON QUADRANGLE, [bull. 182. 
under Hurricane Peak, this mine may be conveniently described with 
those of Placer Gulch. It is one of the oldest workings in the 
district, and in 1877 shipped 370 tons of ore to Lake City. This ore 
was carried b} 7 pack animals to Rose's Cabin at $3 per ton, and is 
said to have contained 30 ounces of silver and 64 per cent of lead. 
The mine was most active from 1878 to 1880, and during one of these 
years is reported to have shipped $60,000 worth of ore. It was still 
shipping ore in 1882. It was worked by an open cut and through a 
vertical shaft. There are at least two large lodes, and the shaft is 
sunk at or near their junction. The largest strikes N. 80° E. and 
dips south 75° to 80°. Its croppings are very prominent and in 
places over 200 feet wide. It is quite likely the same lode as that on 
which the Custer claim is located, but is not worked in the Mountain 
Queen. The lode exploited in this mine appears to strike about N. 
42° E. and to dip southeast at nearly 85°. It apparently curves some- 
what and passes through a saddle east of Hurricane Peak, but the 
abundant talus and numerous intersecting veins obscure the course 
of the main fissure. As seen in one of the old levels, 60 feet below 
the surface, the vein is wide and adherent to its walls. The galena 
occurs as rather irregular bunches in the quartz near the footwall. 
At the present time work is carried on by a few leasers in a shallow 
shaft south of the old works. The ore as sorted for shipping is 
nearly solid galena. It is associated in the vein with chalcopyrite, 
pyrite, sphalerite, and sometimes tetrahedrite, in a quartz gangue. 
No rhodonite or rhodochrosite was seen. Fluorite was observed with 
some galena ore in a prospect about 100 feet north of the old work- 
ings, but may possibly not be on the same vein. The country rock 
of the Mountain Queen belongs to the Silverton series. 
Other lodes. — Several other lodes than those mentioned have been 
worked to a small extent in Placer Gulch and on California Mountain. 
The Evening Star, on the west side of Placer Gulch, has shipped some 
ore, consisting of galena and tetrahedrite with pyrite, sphalerite, and 
chalcopyrite, in a quartz gangue. The Custer is a large lode which 
crosses California Mountain just north of the northern peak. Its 
strike is N. 81° E., and it is supposed to dip south. It is possibly the 
same lode as that upon which the Mountain Queen mine is located in 
California Gulch. The ore of this prospect resembles the Ridgway ore, 
save in the presence of rhodonite. It carries chiefly an argentiferous 
lead sulphobismuthite, wrongly called " brittle silver" by the miners, 
and pyrite. The workings are of a most superficial character. The 
Black Diamond prospect is on a strong lode striking N. 56° E. and 
dipping 80° NW., on the eastern slope of California Mountain. It is 
crossed by another lode striking N. 81° E. and dipping 80° NW., 
which passes through the saddle between the two summits of the 
mountain. The ore in this lode is chiefly a gray copper, carrying 
both antimony and arsenic, with lead and a little silver replacing part 
of the copper. 
