The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1906-12-30

a shaft is being sunk in ore, and
deep working tunnel is now being driv-
en-, through which all of the ore of the
mine will be taken. Electrical power
is now being taken into this property,
and orders for machinery are placed to
handle a tors.Axe commensurate with
the showing of ore.
Organized by a strong company with
a broad plan of development and am
pie money. this company should pro-
duce COPPER IS cheaply AZ any in the
country. The future of r'ie company
cannot DC anything but bright
One OF The most competent engineers
in this part OF the country who recent
w made a study of the Yerington dis
trict for some Salt Lake capitalists who
contemplated investing in the district
made the following report OF the Ne
vada-DouglaS mine:
1.-The ore bodies in the Nevada-Doug-
las occur in the limestone and IRE
doubtless replacement deposits, the
mineral solutions having assembled
through numerous small assures and
impregnated the lines. The groupings
are massive and extend for approx
imateIy 300 feet by 5000 feet, in many
nIaces covered by slide rock so the
average size cannot be determined.
IT is an interesting fact that in many
places the most Inpromisins croppings
on being broken into show excellent
! ore underneath. and this fact makes
even an approximation of the availa-
bic ore on the surface impossible.
Ore 500 Feet Wide.
! ION the Douglas claim the ore has
an approximate width on the surface
Of $50 feet. locally called blowout,
but doubtless having been caused by the
intersection of the east-west and north :
south fissures. Tbia body of ore has
been open Il by = cross-cuc tunnel,
raises and shaft. and the principal
commercial ore 50 FAR developed IS III
this piaca
, The estimate oC 50O9O tons of 6ls
per cent copper ore in the ground eX-
posed = doubtless conservative, ana
only represents d sTrill part of the or .
which viii he fully developed oy sy5-
tcmatic DEVELOPMENT. There is also ap-
rr6ximateiy 5000 tons of ore on the
dumps that will average = per cent.
The tonnage Of tn surface ore as
mentioned above cannn= b. given even
, ~ an 5pnro~ imatic:- hut win without
doubt lnn unit TO ina = liu"sTsh t'ipu-
sand iore.. 81 . -~1Ic tAat Will uiii-
| inateIy make it wOI ka5lc ore.
The nrc- ertv is IA 4 C1iid g: f'r
continued n.iuinG OF Id tons ii ore a
day for hong perSol ard tonnage is
being ad lei every .tay ia numerous
: places on the property"
Near Railroad.
; The. Nevada Douglas property being
, about seven miles from Yerington, and
! being within sixteen or eighteen miles
/ south of Wabuska, can reach the To-
nopah branch of the Southern Pacific
: railroad. The holdings of the company
: embrace twenty-one claims and frac-
ton, all in ore body and comprising
, more than 500 acres.
If is a weli-knovn piece of property
: and of so much Importance that it is
? marked on the map of Nevada as the
douglas mine" Years ago, when cop
per was extremely low in price. for
mer owners of the Douglas marketed
about $4,000 of a grade ore ranging
: from 80 to 40 per cent copper to the ton
While on the dumps and stored i'm
sacks are thousands upon thousands
of tons of ore which will average bet
ter than 10 per cent, the old workings
of the property are showing up immense
r bodies OF the metal which will assay
, | all the way from per cent up into the
1 fancy figures.
p PuzzIing Formation.
: II Is difficult to explain the geology
of the large masses of ore in Doug
, las mountain but it is best described
+ as a deposit of carbonate, sulphide and
! oxide showing no distinct lines of de-
narration Each character of ore
. changes within a few inches. The gen.
! eraI formation is garnetiferous lime
blue lime and massive white lime, the
ore occurrences making in assures cut
IL, ,2ti
: the ore-bearing zone extending, gen.
orally, from one fissure to the other
. interIaciug. The character Of the orc
. annarentIy has not changed from the
, surface to the greatest depth obtained
: $50 feet.
In the stopes can be seen large
masses of what is locally termed spot
: ore. which is dissirnilar to the general
: character of the ore of Douglas noun
> tain. In appearance 1t resembles gran
: tie and is often mistaken for this rock
unless closely observed The gangue
is gray. the mineral being a black OK
r. ide of conner. So far as is known, the
..sDot'' ore exists only in Douglas noun
: tain Tt carries from IS to % per cent
: copper to the ton.
Four Different Outcrops.
There are four different characters OF
outcron on the Nevada-Douglas. First
. a hard and compact rock impregnateo
? with carbonates; second, soft light
coIored limonite with varied-colored
chalcesony scattered over the surface;
. and fourth, a typical gossan outcrop.
There are no obstacles whatever ir
: the metallurgy OF Nevada Douglas ores
: according to the tests which have beer
: recently made. Such ores as carry
| per cent and more of copper also carry
an excess of iron and are self-fuxing
? or almost so.
Tonnage of Mines.
e While the Yerington district con-
2 tains other properties which are sure
I to make important mines, ii is certain
( that none of them will be any bigger
or better than the Nevada~pouglas.
? Mr.. A. L. PeaTse, Well hoWn Lon