The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1910-04-18
MINES OF WESTERN
STATES INSPECTED

The Increasing interest in the mineral
products of the western states. especially
broadly tern:od the Rocky mnuptair re-
eion. IS reflected in the largo measure of
attention given To that region by the geo
logical survey. which for several years
his issued under tho tide Contributions
10 Economic Geology" annual volumes
devoted largely 10 the mineral resources
OF that part Of the country.
The latest volume OF this series (Bulle-
tin $500 contains u number Of valuable
papers. discussing gold. islver. cement
and Iron In Colorado gold. silver copper
and asphalute In Nevada; gold and silver
IN Oregon; lead. zinc and Iron in New
Mexico; wolframite uud marble In Arl
zona. and other lesser deposits.
The revival Of interest in Nevada gold
discoveries at Goldhcld has led 10 the
development OF nincr distrir5s. two OF
which are discussed in the bulletin. The
town OF Hornsilver. which lies in Esmer-
aida county, 26 miles southwest OF Gold
ficld is described as u promising camp
though %her II was visited only one mine
had been developed far enough 10 ship
ore. one or 10 ncighhGrIug mines that
were worked forty ycars ago but were
ahd- dOn"1 on tcsouut Cf transportation
difficulties, have now been rcopcned
Round Mountain. another camp described.
lies a. miles north of Tonopah. Only
one mine was examined in detail. and
this was found 10 carry oXldized ore av-
eraging $40 TO SIS to the ton. The dirt
a
Mountain was being washed by hydraulic
power with good results.
large number OF promising copper
mines have been opened at Yer,ngton, In
Lyon county. New Ttey all lie In the
Singatse ridge. close 10 the town. and
are strung out III n chain two miles long.
Most OF them have shipped some oNi-
dlyed copper orc. hut operations are now
corflncd TO 'he suph!do ores Some OF
them are old mines.
The asphal:ite deposits of northeastern
Ne ada arn ESQ deserted The material
closely resembles a deposit in Oklahoma
which has been fully examined. II looks
much like coal. but is much lighter In
weight. These deposits probably cover
explored. Their existence shows that
there was once much petroleum I'm the
region. but this probably escaped long
ago. owing 10 the shattering Of The rocks
by geologic disturbances.
Wolframitc is an ore OF tungsten and Is
valuable in proportion To It's rarity. The
deposits in Arizona are in Cochise county.
Those that have been found have been
ably exist The ores lie in granite near
its contact. with schIst and in quartz
vein that traverses the granite.
Arizona contains valuable marble de-
posts. which are located in Cochisc
county in the Chiricahua mountains. The
marble lies in thick zones In the lime
stone strata and is widely dis; ributcd.
One claim Includes ledge seYenty-f1ye
| feet thick and $50 feet long, containing
marble that is free from defects The
material is well nitcd for Interior deco
! rative work and fpr general architectural
| uses.
| The annual Volume Containing short
papers and preliminary reports on eco
nonia geology. "a be rutlisl.cu during the
| Meanwhile copies az the las: volume
U5ulletir $3.50 may bc obtained: free o.
csarTe ny writing i' tic director. United
states Geological Survey Washington. d.