The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1909-06-28
WHAT L0W.GRADE
C0PPERS CAN Do
Modern Method of Placing Ore
Tonnages i'm Sight Alters
the Situation.
CAN FIGURE COSTS
AND PROFITS WAY AHEAD
Millions of Tons Brought to
Light Where Hundreds Once
Was the Rule.

There is nothing like an abundance
OF ore reserves to give mining stock
hat sense Of security which is so often
supposed to be lacking in ventures OF
his character. Once the reserves arc
determined. both as to quantity and
quality, it enables stockholders to make
some basis of comparison between the
selling price of the stock aud its mine
valuation, says the New York Mining
N2e.
In this regard the copper porphyries
enjoy tho widest latitude of any mine
venture promoted in recent years
Where the ore in question is known TO
be commercial proposition. 1T is the
easiest thing in, the world to compute
The tonnage and the minimum amount
Of profit that will result from treating
the ore Using the lowest and most
conservative figures possible, a safe av-
erage is readily concluded.
As an illustration: Assume a prop
erty having determined ore body
mea suring 100000 tons of per cent
copper ore. Surround the enterprise
with only such disadvantages as are
normally encountered and figure cut
The tonnage from the reserves. The ore
in sight will give the company 400
100000 pounds of copper. as there is
ordinarily 90 pounds of copper TO each
per cent in every ton OF ore. Allow
ing for 70 per cent saving of the
metal, the balance TO be lost in concen-
tration: gives 2S pounds of copper
saved for every ton of ore treated,
Supposing 1t will cost the company 9
cents pound to produce this product,
the difference between the selling price
bo
the market as low as possible, i. G., l.
cents gives the company net return
of three cents pound. On its total re-
coverable copper of 2S0,000,000 pounds
4 profit of $S,400,000 is assured.
There is very little speculation IN
This proposition. Here for a period of
years ahead you know TO a well pre-
determined degree what your company
an do. provided the operating fca
urcs are left TO men whose knowledge
II the business is safeguard as TO
what they intend doing In fact, the
sntire idea from beginning 10 end is
outlined in one breath. The orc is the
me feature. From the inception TO the
iiquidatiug period of the corporation
al of it's merits arc ascertalnable be-
tore the investors steps into the share
holder ; clothes
In addition where companies own
-ihliiy Of extending the already de.
6ucd limits, II is ore of the peculiar
characteristics Of these low grade cop
per porphyry deposits that they grow
fuster than estimates can be made re-
garding their recovery. Less than a
NcST ago an estimate Of II 900 900 tons
FOR Nevada Consolidated. 50.000.000
tons for Utah Copper and 100000 tons
tor Miami were considered liberal
Today we find 2S 700 900 tons for Nc.
vada Consolidated. II ,000.0 600 tons for
Miami and nobody knows lust how
arsc the Utah Copper company deposit
will eventually be. An expert lust
back from Arizona tells us that the Ray
Consolidated Coppor company is adding
10 iis tonnage at the rate of 1000, ,000
ons per month.
OF course tho modern methods which
invoke tho churn drIll are responsible
for these quick results. Not long ago
It WAS considered good year, work
10 open 100000 tons of ore blocking
out ore in the veins. Now all this is
changed. People want 10 know so much
ahead of time that nothing less than
fbe drill can satisfy their speculative
curiosity.