White Pine news. [volume] (East Ely, Nev.) 1920-1923, 1923-03-25
R0sTON.ELY PRODUCING
COPPER At A PROFIT
Continued from Page One.)

"a with working conditions held as
.hov are he believes the cost may be
IN, at an average Of $3.50, which
= commensurate with these eondi-
.sone and the tonnage produced.
with a greater tonnage as space is
anlarged and facilities provided this
average cost will recede. In n way
Tho stopes are deceptive, as appar.
ant,v the mining cost should be light
- than II Is, but the ore occurrences
are irregular, making 1t necessary to
n,eak down a great deal of limonite
N follow and mine the Ore
operations were started In various
faces exposed in the limonite zone
oboye the Mitchell tunnel. Removal
~ ore has obliterated many work.
,ngs until Two main slopes remain,
which eventually, through the rela.
,ion of the ore occurrences, will
nroye TO be one and a single stope
ranresenting this growth. Pillars of
waste are left where possible and
every pound of valuable ore removed.
The slopes are kept filed with brok-
On ore and the sides and back of the
stones mined from back OF the pile,
occasionally only by the use OF
stages. Great caverns are left and
II Is not found necessary 10 timber
fhem. Il being thought that the
ground will stand for all time.
These slopes will be filled with waste.
While the dimensions OF this limo
mite body have been determined with
fair accuracy, the ore occurrences
heretofore have exceeded the asti-
mates and It is thought probable that
they will continue to do so.
Development work for the year
has beer confined 10 the Mitchell
tunnel vicinity and the Unexpectedly
good results impel the consulting
engineer TO advise that work be re-
sumed in the limonite zone of the
Florence shaft. 1t is down sixty
feet. A hoist and equipment for thic
ed to further depth. A copper assure
vas explored In No. . shaft, which
appears to promise production at
depth, but this Is regarded IS sec.
ondary importance 10 the develop
ment OF copper ore below the fifty
foot level, which is in progress and
will be prosecuted vigorously. This
will be used TO determine the exist
enoe Of commercial ore on the 100
and prospecting on the 200 may fol
low with greater incentive.
In former reports the engineer has
called attention to the residual char
actor OF the ore there being merely
remnants OF copper left In the in
tense teaching process. his prediction
being that richer ores will be found
with depth. The extensive leaehed
zone OF the limonite indicates that
the area OF enrichment Is far greater
han estimated and he is convinced
that a great deposit of high-grade
sulphide copper ore will be found
below the approximate location OF
the Mitchell workings and that 1t will
be similar to the deposits In the
Ruth mino of the Nevada Consoli-
dated. A diamond drilling campaign
Is under consideration. II this Is
undertaken 1t will be from a drift
10 be run on the 800 level. which Is
slightly above the present water
level.
The zone of secondary enrichment
should be found at the top of the
porphyry sill beneath the bedded
limestones and the depth will de.
pend upon the thickness OF these
beds
Otherwise in a general way the
management purposes To open new
ionnages in places that have barely
been explored but which promise
commercial bodies. The company's
holdings are extensive and the pres
ent center of workings Is but n frae.
lion OF the area OF promise. The
Florence is regarded as sure of be-
ing equally productive and there are
several other parts that have been
SHOWN TO be potentially ore bearing
BY shallow pits.
Ore occurrences are erratic but II
Il predicted that the mine will be