New-York tribune., 1909-09-25
STORY OF THE GOLD RUN MINES.
Employment of the Cyanide Process Is
a Proven Success.

From Boulder County. Col comes the news
that the 1OO-ton cyanide. roasting and concen-
trating plant was destroyed by fire. along with
other property OF the Tambourine Mine Strange
as II may seem. this ill-wind has blown the
stockholders good. in that the unfortunate Oc-
currence has prompted movement to double
the capacity OF the mill
After thorough examination into the results
OF the 100 ton MIL the directors have decided TO
build In the place the old mill 200 plant,
and TO take every possible precauton against
fire. lr 1t IS found necessary some OF the re-
served treasury stock will be employed in raising
funds for this new equipment
At this time inspection was also made Of
the transportation facilities on the property,
which were found TO be in good condition. along
with the economic supplies or the natural re-
sources such as fuel and water. which were
noted as most favorable Tor pushIng the work to
an early completion.
In this connection II should be recalled that
w Wintcmute was responsible ror the intro
duction ot the cyanide process IN this section.
The Tambourlne Mine clearly demonstrates tho
worth ~ this process in handling the low grade
ores In the enormous dumps this property,
estimated 70 contain from seventy 70 eighty
thousand tons has proven the feasibility OF
doubling The capacity. IL every gold mining dis
trict ot the country millions OF dollars have
been realized IN proAts b. cyanidIns the I'M
meuse piles II ore, which have been dumped
aside valueloss because Of the expense in
vo,vcd IN cxtricating the gold which was there.
Therefore, in many cases attention has been
given 10 high grade ore only. for tho reason that
this could be taken out easily and prodtlbly to
the mines
The Boulder section OF the state abounds in
veins containing not only the highest grade OF
gold bearing ore. but also immense deposits OF
ore which are worth millions now that men
know how TO get out the gold at cost which
leaves big margin OF profit.
There is practically mile OF underground
development work already ccwpleted on the
Tambourine Mine, the expense OF which has
been covered from the shipments OF high grads
ore. for which the mine has production record
of nearly half a million dollars. Aside from hav-
ing paid for the developing expenses OF tho
nine up 10 date, n considerable sum has been
realized in profits. This condition OF the com-
panys affairs assures that under the doubled
capacity now proposed the stockholders may
expect larger dividends and more satisfactory
results in general
In these workings there are vast bodies Of orc
yet 10 be opened up from which the company
win realize handsome proht with the aid Of
the 200 ton cyanide plant and the main vein,
which strikes north about 80 degrees east, with
n downthrow OF 65 degrees toward the west. IS
sharply defined, with highly polished walls and
opening UP into large shoots Of high grade orc at
intervals, sample OF the middle OF one OF these
shoots assaying 7.40 ounces in gold, or s14S per
ton. 1t is now plain and simple manufacturing
proposition of extracting the values from the ora
already in sight
Some idea OF the magnitude OF tho possibilities
Of the Tambourine Mine may be gathered from
the following description: The main vein has
been drifted on for only 1.4OO feet on one level
and has been proven only 20 depth OF 400 feet,
whereas 1t traverses the company's property a
distance of 5000 feet and is believed TO go to
vast depths. Likewise tho Hoosier Dyke. an
immense gold-bearing ore body. seventeen feee
wide and one-half a milo long, is a valuable
property OF the company. This dyke is known to
reach depth OF 500 feet. and at the 400 foot
level produced shipments which averaged better
than 81 per ton. although the assays obtained
have run from So 70 s19 per ton. 1t is believed
the entire dyke will realize the company gross
production OF Sc per ton, 81 net. Figuring
TO depth of 500 feet only and one-half mile in
length It is calculated that there are here avail
able approximately 1.25O.OO0 tons of ore II is
almost certain that this dyke viii go 70 vast
depths. Besides these two great ore bodies, the
Tambourine and the HoOsier Dyke, there arc
many others being developed throughout ths
property. and the company is certainly Justified
in claiming the Gold Run ores TO be practically
inexhaustible.
Regardless of the reports Of the Gold Run
Mining and Tunnel Company Boulder County,
Col. is noted for its extensive low-grade gold
mines and Is unique In the fact that 1t is the
a of Uorufa In fa1