bansome.] PLACER GULCH AND TREASURE MOUNTAIN LODES. 179 
half a mile below Lake Emma. Its strike is N". 43° E., and it dips 
northwest from 45° to 00°. This mine caused considerable excite- 
ment in 1883. Two tunnels, 20 and 80 feet in length, had been run 
and some 300 tons of ore averaging $36 per ton had been taken from 
the longer tunnel. An inclined shaft was also sunk for a short dis- 
tance on the lode. The ore consists of sphalerite, galena, chalcopy- 
rite, and pyrite, in a gangue of quartz and rhodonite. Masses of 
richer ore, carrying tetrahedrite and native silver, are said to have 
occurred in caves within the lode. A road was built up Eureka 
Gulch to the mine, but the latter did not fulfill expectations and was 
abandoned. 
PLACER GULCH AND TREASURE MOUNTAIN GROUP OF LODES. 
General. — As may be seen by reference to the map, on which only 
a few of the most prominent viens are shown, the veins of this areal 
group form a complex network in which certain dominant directions 
of Assuring are plainly recognizable. There is a series of strong, con- 
tinuous lodes, represented by the Sunnyside and Scotia veins, having 
a general course of about N. 40° E. The dip of these is southeasterly 
at a high angle. The Scotia lode appears to be a very persistent one. 
There is good reason to suppose it to be continuous with a lode which 
passes up Cinnamon Creek and over Wood Mountain to the Lake 
Pork of the Gunnison. A second system of shorter, less conspicuous 
veins crosses the first series almost at right angles, with a coarse 
approximately N. 55° W. These are nearly vertical, but the majority 
of them dip southwest at high angles. Whether they are older or 
younger than the dominant northeast veins could not be satisfactorily 
determined with the exposures at hand, although some of them appear 
to cut the Scotia lode. A third system of transverse veins, repre- 
sented by the Golden Fleece, has a course about N. 75° E., with 
usually steep southerly dip. Besides 1 he three systems already noted, 
there is a very prominent set exposed at the head of Placer Gulch, 
which have an average trend of about X. 25° E. Their dip is usually 
steep and easterly. They resemble in character the great Sunnyside 
lode, and in most cases are branches of the latter, forming with it a 
fan-like group somewhat similar to that previously described in Silver 
Lake Basin. 
There are several other lodes in this area which do not strictly 
belong with any of the systems noted. Several of them have a nearly 
east-and-west strike and might perhaps be grouped together, or pos- 
sibly included with veins of the Golden Fleece system. 
The country rock of all these lodes is in the main the Silverton 
series, with a few masses of intrusive rhyolite. 
The Sunnyside Extension lode and those just described as its 
branches resemble very closely those in the Sunnyside Basin. They 
are for the most part strong, heavy lodes with bold outcrops, to which 
