El Paso herald. (El Paso, Tex.) 1901-1931, 1911-12-20
MINING NEWS
BIC Development
IN GLOBE DISTRICT
The Live Oak Operates Two
ChUrn Drills; Miami Out
put 2500 Tons Daily


Globe, Arizq Dec. 2O.-The develop
ment of the Live Oak mine continues
steadily with results reported TO be
satisfactory. The work at No. . shaft
is at present confined to the cutting
Of a station at the so0-foot level which
is near the bottom Of the orebody.
This shaft is near the western end of
the property and encountered ore at
a depth Of 705 feet. The ore continued
to a depth OF 915 feet. where the shaft
entered the zone of primary ssulphides.
The ore consists of chalcocite. the
black sulphide Of copper, in an altered
silicified schist and averegaed > "a
percent. copper for the 21O feet for
which 1t was exposed in the shaft This
is considerably higher than the average
for the entire orebody, which is re-
ported to be 2.11 percent.
After the station on the 900-foot
level has been completed, drifting on
the orebody viii begin, according to the
present intentions of the mana cement.
Drifting is In progress from No. l shaft
at the eastern end OF the STebody and
raises are being driven on the ore.
Two churn drills are in operation
near the western end and a third drill
IS being set up over hole No A. This
a
Of about 1000 feet and had to be dis
continued at that depth on account of
caving, though the bottom of the hole
was still In ore. An attempt will now
be made to deepen this hole with three
inch tools and reach the bottom of the
orebOdy- One of the holes now being
drilled is reported to be in very good
ore.
keystone Operates Churn Drill.
The New keystone Copper company
is operating one churn drill on hole No.
Al few hundred feet northwest of the
shaft Results are not made public.
The keystone property lies between the
Live Oak and the Inspiration Its ore
reserve is officially reported to be
100000 tons averaging 2.25 percent
copper
Inspiration Mil Running.
The experimental mill of the Inspira-
ton Copper company is running stead
lily under the supervision of J. NJ Cal
low, consulting metallurgist to the
company. Tests are being made to de-
termine the best method Of cOncenerat-
ing the Inspiration ore and several diff
ferent makes OF crushing and concen-
IraLng machinery are being tried out
Previous tests have shown that a
recovery Of IS percent. is possible on
ore averaging 1-95 percent copper or
80 pounds of copper to the ton and this
figure may be exceeded.
At the site of the proposed storage
dam and pumping station on Pinal
creek, near Wheatfields, Is miles from
the mine. a IDFCe OF men mas Deen at
work for several weeks digging test
pits to determine the character and
depth below surface of the bedrock. /
preparatory to the construction of the
dam. This work is now completed and
has demonstrated bedrock to lie about
u feet below the surface and to con-
sist of dacite, a vOlvanic formation Of
a character that viii insure a good
foundation of the proposed dam.
The preliminary surveys at this point I
which have been under way for several I
months are now virtually completed
and a telephone line is being huilt
from Wheatfields to the mine.
a new temporary warehouse is be-
ing erected near the portal of the main
tunnel and excavation work is being
done for large steel warehouse near !
The gravel from the gulch near the
portal Of this tunnel is being tested
as to its suitability for the making OF
concrete, to be used in the work of |
construction that has been outlined
The time for beginning this work is /
vet indefinite, as the merger with Live I
Oak. negotiations for which are now !
pending, may cause considerable I
change in the present plans. but it Is I
very probable that construction viii I
begin early in the coming year.
Miami Mines $500 Tons Daily.
The Miami Copper company, with five /
of the six units Of the concentration in /
operation, is mining and concentrating /
200 tons of ore per day.
The fifth unit which was started on 4
December I, is reported TO be giving ex- [
cepuonaly good results. Three six 1
foot Evan Waddel Chilean mills are I
used for the fine grinding in this unit 1
as compared with two six-foot Trent /
Chilean mills in each of the first three 4
units and two eight-foot Hardinge peb- |
bic mills in the fourth unit
machinery and other equipment is |
being installed in the sixth unit and |
1T is expected that this unit viii be /
running early in January.
1t Is reported that a recovery OF Is ]
percent. of the copper content of the I
ore is being made and the production /
Of refined copper is estimated to be at /
a rate of about $500, 900 pounds month |
ly.
The third generator set is being in !