White Pine news weekly mining review. [volume] (East Ely, Nev.) 1910-1920, 1912-01-07
|ada Did Not Become
ktor in Copper Industry
Until Three Years Ago
IS SIXTH IN PRODUCTION
hISGS OF NEVADA CONSOLI-
|rED TURNED OUT SIX PER
|yT OF BLISTER COPPER IN
|E UNITED STATES.

production of blister copper
rada In 1910 was 64,494,640 /
as compared with 53.S49,-
kounds in 1909. the increase be-
BON the Ely district.
earliest records of the produe-
Id copper In Nevada was for
but 1t did not become an i'm
It factor in the copper industry
I190S. when production from
h. district began.
Ihe close OF 1910 the state has
|ord production of 137.s39,097
Ls. or 0.9 per cent of the output
l. coue;ry t:nce 1S45. tt this
Il probably be added small
Unknown quantity produced as
Zone In the early days of min
L the state and used locally in
Treatment OF gold ores. In
production Nevada ranks
Il and in the output for 1910
among the copper producing
Ely District.
Il Ely district, White Pine coun-
Eas the only important copper
Lelng district in the state in
! Although IL has long been
kn that the district contained
Ier deposits. active development
IN important scale began but a
kekrs ago, and important produc-
| did not begin until 1908. when
Isteptoe Valley smelter and con
tatlng plant was completed.
bring 1910 the district produced
il 6S, 100000 pounds of blister
Yer. and TO the close of 1910 the
|ut has been about f25. 100000
bds. The district has yielded
per cent OF the total amo6nt of
country since 1S45 and 80 OF
production OF 1910. In total
Eaction IL ranks tenth and in the
Euction OF 1910 sixth among the
Der districts of the country.
he district is in the Egan range,
geology of which may be summa-
y as follows: Paleozie lime
|es and shales have been invaded
granite intrusive technically
|En as quartz monzonite porp-
b. Later the area was buried
bath lava flows which have been
|arge part removed by erosion.
he copper ores are of two types,
|aeement deposits in limestone
? the porphyry contact and dis
|lnated deposits in porphyry. The
|osits In limestone thus far deyel-
4 have been principally oxldized
and there has been but small
nnetlon from this type. In the
animated type the original ores
|pyrite and chalcopyrite dissent
I'd through the greatly shattered
highly altered porphyry. The
lmerelal ore has resulted from
secondary enrichment of these
osits by the removal of the copper
p the upper portion and redeposit
rhalcocite on the sulphides lower
N. The con. mereial ore consisting
srains of pyritr and ehaleopyrita
" or entirely replaced by chal-
Ne The teaching capping is oil
'lng thickness. but for a part oil
deposit II Is thin enough to per-
OF Its removal and the mining OF
by steam shovels; for the re-
ned underground methods will be
loyed.
uring the year 2.346.354 tons of
yer ore mined In the district pro-
ed concentrates containing 62,-
41s pounds of copper. The
age recoverey in concentrates
ton OF ore from the district was
YER l.3 per cent. with about Il
In gold and silver per ton OF
Smelling ores amounting to
20 tons contained 2.77 per cent
YER, with 60 cents In gold and
u per ton.
ne Nevada Consolidated Copper
pany and the Giroux Consolidat-
Mines company were the most
'e operators In the district, the
uction being mainly by the for
company.
ne production of the Nevada
''olidated Copper company for
was almost entirely from the
yer Flat pit. though the Liberty
was partly stripped and prepar-
Or production of ore In 1911.
ores were treated at the COM
s concentrating and smelling
at McGil.
ie company reported as develop
,uring the year ending Septem-
90, 1910. a total OF l4,500.565
OF ore averaging 1.2S per cent