The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1913-05-25
Mother Lode of Camp.


can all be milled at profit.
Mother Lode Of Camp.
This dixie is from thirty to forty feet
wide in places and is now regarded as
| the mother lode or chief source of en-
richment Of the mountain, known as
Gold Hill on which the mine is stu
ated. The lime schist. which is both
the ore and the country rock, forms
both the foot and hanging walls Of this
quartzite dixie. 1t is a material that
| in itself is practically barren, but the
enrichment occurs in the many and
linfnitesimal fractures In this material.
the gold, in greater or less quantity,
permeating this entire mass and rem
dering it all of sufficient value to put
through the mill.
Both the chist and the quartzite are
exceedingly friabe and are easily
ground In treating the quartzite this
material will be crushed IN the same
manner as the schist and will then be
put over revolving trommel screens, the
fines, carrying the softer matter in the
| fractures, making the pay ore and the
larger particles going off in waste.
Large quantities of the schist that had
been classed as second or low grade ore
can now be treated by the company's
simple milling process with a good re-
this. left in dumps on the surface, is
being economically handled by dump
| ing through old raises to the 100foot
! level and hoisted to the crusher.
Mill Is Too Small.
| 1t is now planned by the company to
at least double and possibly TO quad
ruple the milling capacity during the
present year, the mill now having but
ten stamps and q capacity, under most
favorable conditions Of from l30 to 140
tons daily. The mill is model of sim
plicity, efficiency and economy. From
the collar Of the shaft the ore is
trammed about 100 feet to the crusher
at the top Of the plant, whence it goes
| to the stamp batteries, thence to the
classi6ers and here it is raised q few
feet to the tube mills, passing through
140mesh screen to the anna algamation
plates, of which there are four, each
thirty-six feet long and with a section
recovery has been highly satisfactory,
the gold being all free and the failing
Welding only from 80 to So cents.
Production of late has been cur
tailed as the company is now installing
the new surface hoistiug equipment,
including a l00-horsepower electric
hoisting engine and motor, double-deck
| cages ana the LTOHlJncl screen DldHC re-
ferred to. This equipment will cost in
the neighborhood of $4,000 and is eI-
pected to bring the present mill capac-
ity to 40 tons daily. Your correspond
ent visited and inspected the Big Four
property n few days ago and upon re-
turning to Goldfeld, in company with
President L. K. Kooutz. brought in a
bar of gold valued at $4,000 and repre-
senting less than week s mill opera
ton. The records show that the mine
is producing at the rate Of over $1,000
daily and the mill turning ore about
5000 every twentyfour hours, in spite
of the reduced output while installing
the new hoist. The bullion. as it is re-
torted in the Manhattan mill, is worth
$3.50 per ounce and the Big Four
company is also installing its own re-
torting plant.
Low Milling Costs.
During April the total operating costs
Of the Big Four company, including
mining, milling and administration
were 1898 per ton and the management
lis confident that this will be reduced
to not over 50 per ton with the new
Ihoisting plant in operation. For some
time past it has required the services of
only FIVE men working in ore to supply
the mill, but development is being con.
Quoted at various points in the minG
and with excellent results. New work
4 that has been conducted on the 100foot
lleyel for the purDose of determinjn n o