PAHUTE MESA, ECONOMIC GEOLOGY. 139 
second, which they cut. As a rule they are more narrow and less 
continuous and clip more steeply than the veins of the second class, 
In places they curve sharply. The quartz in them is similar to that 
in the second group. 
In the vicinity of the vein the granite is cut by partings stained by 
limonite and manganese dioxide, which are parallel to or join the 
quartz veins at low angles, and the surrounding kaolinized granite 
is said to carry values. The granite near the veins is in places thickly 
peppered with cubes of pyrite altered to limonite. 
The ore of the two younger sets of veins so far encountered is 
practically all oxidized, although a little original galena remains. The 
predominant original sulphide was pyrite, and limonite cubes after 
pyrite are common in the quartz. Assays show the values to be in 
the proportion of one of gold to four of silver. Some silver chloride 
was noted, while secondary native silver is reporte 1. In one pros- 
pect calcite is associated as a gangue with quartz. 
While the quartz of the first set of veins is of pegmatitic origin, 
its mineralization is probably later and genetically connected with 
the filling of the fissures of the second set, probably in Tertiary time. 
After the veins of the second system were fractured another period 
of mineralization followed, perhaps in late Tertiary time. Later the 
veins were crushed and surface waters have more or less completely 
oxidized the sulphides. 
Wood and water are hauled from Antelope Springs, about 9 miles 
away. Trappmans Camp is 40 miles by road from Goldfield. 
WILSONS CAMP. 
Wilsons Camp is 2 miles north of Trappmans Camp and was dis- 
covered in May, 1904. Five miners were employed in July. 1905, 
and at that time several shallow shafts and short tunnels were open. 
The country rocks, white altered rhyolite and biotite andesite, are 
cut by rather steeply dipping quartz veins, the majority of which 
strike northeast, although some strike east. The quartz veins, many of 
which are crustified, are characterized by quartz-lined vugs. Since 
its formation the quartz has in some instances been crushed. 
Limonite and less commonly malachite stain the quartz. The re- 
ported assay values run from $110 to $180 per ton and average one 
of gold to five or six of silver. These quartz veins are to be cone 
lated with the veins of Silverbow. The economic conditions at 
Wilsons Camp are similar to those at Trappmans. 
GOLD CRATER. 
The mining camp of Gold Crater is situated 10 miles east of the 
summit of Stonewall Mountain. The first locations were made in 
