138 
SOUTHWESTERN NEVADA AND EASTERN CALIFORNIA. 
TRAPPMANS CAMP. 
Trappmans Camp lies 34 miles south of east of Goldfield. The 
veins were discovered by Hermann Trappman and John Gabbard in 
June, 1^04, and at the time of the writer's visit a year later five men 
were opening up the veins, the chief development being a shaft 50 
feet dec]). 
The prospects are in granite, and three distinct periods of vein 
formation were noted — first, quartz lenses probably of pegmatitic 
origin: second, quartz veins of distinctly later formation, which in 
one place arc said to cut a rhyolite dike; and, third, quartz veins of a 
third generation which cut the second. (See fig. 14.) The latest 
veins are in places well crustified. 
The pegmatitic quartz forms bodies varying from minute stringers 
in the granite to lenses one-fourth mile long and 40 feet wide. The 
quartz is hard and whitish, and in some places it is intensely 
8 feet 
Later quartz veins Iron-stained fractures 
Fig. 14. — Second and third systems of quartz veins in granite at Trappmans Camp, as 
exposed on face of incline. 
brecciated and stained by limonite. It is said to carry silver and gold 
values. 
The quartz veins of the second class have sharp contacts with the 
granite. These veins are exceedingly common in the vicinity of 
Trappmans Camp and vary widely in strike and dip. In limited 
areas they tend to form series of veins along parallel joint planes in 
the granite. In width the veins vary from an inch or less to a foot 
or more, and some of the parallel series are a number of feet thick. 
Locally these veins are faulted, as indicated by the presence of brec- 
cias, while the surrounding granite shows considerable differential 
movement. The quartz is slightly bluish, but is usually heavily 
stained red or brown by hematite and limonite. Vugs elongated 
parallel to the direction of the veins are sometimes seen. On en- 
countering the pegmatitic lenses, in the one instance noted, these 
veins are deflected downward. 
The veins of the third class are of later origin than those of the 
