The Eureka sentinel. [volume] (Eureka, Nev.) 1902-current, 1922-05-27


ment of its mineral products, but op-
pressed with high rates of transpor-
tation and high costs Of reduction at
distant smelters. the Eureka district
Is building hopes OF a return In a
great measure to the active and pros
porous features OF forty years ago.
and not without reason. But in place
of great smelling plants supporting
an army of charcoal burners, furnace
men and teamsters with big "prairie
schooners" hauling in supplies for
the life and industries of the camp,
there will come the less expensive
methods of treatment for reduction
of the ores to bullion In the forms Of
diversified milling by fiotation and
cyanidation. with the result that in
place of $40 to $40 ore, material that
contains as low as $s value per ton
may be handled with profit.
On Ruby Hill
For the last two years the hopes Of
this community have centered on
Ruby Hill. the home of two great
mines that gave to their owners div
idends which amounted in all to over
$10,000,o00 and kept a population OF
5000 busy for fifteen years. All that
is at present known as reason why
the dividends did not hold out for a
new term is the main geological fea-
ture Of Ruby Hill. great fault fis-
sure that divided into two parts an
enormous body OF dolomite (magnes-
ian limestone) which carried depos-
its, In the forms of pipe and rake
veins, chimneys and extensive cham
bers of metalliferous ore. containing
gold, silver and lead In various forms
and propositions. The fault fissure
extends northerly the full length of
Ruby Hill and was probably the re-
suit of a volcanic upheaval. resulting
in the formation of two separate
wedges of limestone, one, on the
southwestern side, with its thinnest
edge downward and its surface from
500 to 1000 feet wide, and about
400 feet in depth. The top of the
lower wedge is intersected three feet
below its apex by a prosecuting drift
on the 1200-foot lead of the three
compartment "Locan" shaft. which
was sunk by the Eureka Consolidated
Mining Company.
The LOGAN Shaft
Disappointment has been expressed
that the LOGAN" shaft has not yet
been sunk to greater depth and into
the lower wedge of limestone. in
which. the general belief is, a repeti-
ton of the ore mined in the upper
wedge will be found. The apex of
the lower wedge is partly composed
of ore that assayed around $40 per
ton. but this ore differs from that
found in the upper wedge, in that the
latter was oxidized and formed into
iron-carbonate. The ore of the low
er wedge, as far as can be seen, is
less altered and indicates that lower
down, where the ore is all below the
water level. II is all In earlier sui
phide condition. With an additional
depth of 500 feet, the LOGAN" shaft
will probably bottom either in the
lower wedge of limestone or the un-
derlying quartzite. cross-cut going
eastward would soon interset the ore
bearing limestone. The Richmond
Eureka Mining Company. the pres
ent owners of all the land formerly
owned separately by the Eureka Con-
solidated and Richmond Companies,
is now applying for twenty-three
United States patents and may. at
any time after the expiration of the
time required for advertising, resume
the sinking of the LOGAN" shaft, and
two months thereafter Eureka dis
trict may reasonably be sure Of a
new lease of active life and a re-
newal of all its industries. included
in which four or fve big milling
plants may be counted on.
Clarence King. one Of the great
American geologists of his day. when
asked for his opinion on the subject.
said: 81 believe that the ore to be
discovered below the actual water
level will be found in the form of ar
senical pyrites, with larger content
of gold than the iron-carbonate that
was 30 extensively mined in the up
per levels of Ruby HILL"
Uncle Sam Consolidated Properties
The consolidation of the Uncle Sam
and Hamburg mines, both of which
are now under the management and
control of the Uncle Sam Consolidat-
ed Mining Company, Is claimed to
have a very bright future. and active
preparation points to the erection OF
the first unit of a joint fiotation and
cyaniding mill by this company dur
ing the coming Summer, for the treat
ment of low grade ore, which in the
early days of the district was con-
signed to the waste dump. The high
grade ore will be shipepd to the Utah
smelters for treatment. The COM
pany expects to uncover $4,000 tons
of cyaniding ore that will yield up to
$40 per ton, and the Uncle Sam
ground is giving like promise. Two
samples of ore from the Uncle Sam
ground a short time ago were as
sayed,, when one of them from across
five-foot face returned liz ounces
gold and ninety-three ounces of silver
to the ton. The other sample. which
was taken from a width of one foot