KAWICH RANGE, ECONOMIC GEOLOGY. 
are situated are rather suggestive of faulting, although the effecl mav 
be due to a chance distribution of several small masses of silic 
porphyry. 
The resemblance between the Kawich and Gold Crater deposits is 
close. It is probable that waters bearing silica lution arose 
along joint and fault planes and that silica more or tr 
replaced the rock contiguous to the fractures. Pyrite was probably 
simultaneously deposited, partly in the country rock and partly in 
open fissures. Since the silicification the veins have been faulted. 
The kaolinization of certain portions of the porphyry was probably 
contemporaneous with the surface alteration of the original sul- 
phides. From the lean character of the pyrite so far encountered it 
is probable that the rich surface gold deposits have been concen- 
trated from the pyrite contained in many feet of porphyry which 
have been removed by erosion, but it is by no means impossible that 
rich pockets of gold may be found from time to time near the sur- 
face. 
Water is obtained at Cliff Spring, 1*2 miles east of the settlement, 
and pinon grows on the Kawich Range 8 miles to the north. Tono- 
pah is 70 miles distant by road. 
SOUTHERN KAWICH. 
In the blue-black Pogonip limestone on the northwest slope of 
Twin Peak-. G miles south of Kawich. prospects are located on a 
quartz vein H feet thick. The quartz is strongly stained by limonite 
and is said to carry free gold. 
AREAS FAVORABLE TO PROSPECTING. 
The areas noted in the progress of work in which occur altered 
rocks of the same character as those which accompany the ore de- 
posits at the camps already described are shown in fig. 4. Other 
areas of similarly altered rock doubtless exist, although it is believed 
that the largest are mapped. Of the rhyolite area- shown those 
near Silverbow and Eden and east of Blakes Camp contain an un- 
usual number of quartz veins. The monzonite porphyry in which 
the ore deposits of Kawich occur is confined to the immediate vicinity 
of the town. The areas of altered monzonite porphyry have already 
been located and the future of this form of ore deposits depends 
n the development of these areas. 
Quartz veins occur in the Paleozoic sedimentary rocks, particu- 
larly in quartzite. So far as seen these veins are narrow and of no 
fereat length, and with the exception of the Southern Kawich veins 
the quartz is apparently barren. Quartz veins, probably barren, on 
the western side of Quartzite Mountain contain tablets of specular 
hematite. 
Bull. 308—07 m 8 
