Bisbee daily review., 1908-11-03
HAYDEN TELLS
OF LOW GRADE
COPPER ORES
Well Known Authority Visits
Several Mines to Study Low
Grade Disseminated Ore In
Schists and Porphyries.

BOSTON. Nov. 2.-Charles Hayden
has Just returned from a months trip
in the West In company with d. G.
lacking. A Chester Beatty and other
well known mining men. He says:
The object OF our trip was to study
discoveries and developments of low
grade disseminated copper ores which
occur in porphyries and schists, as
believe that the are to become the
leading factors in the production Of
copper.
The Utah Copper Co. was the pion
Ger in the successful working out OF
the problems of handling these low
grade ores and equaling or lettering
the cost of production heretofore at
tanned by the higher grade vein mines
There is nothing new to report at that
property other than that everything is
working satisfactorily and the capac
ity and output are constantly increas
ing.
Nevada Consolidated, which Hay.
den, Stone & Co. brought out about
four years ago, was the second large
commercial success in the develop
ment and treatment of these por.
phyrieS.
"A very promising properly is now
being vigorously developed at Kelvin,
Arizona, by the Ray Consolidated Cop
per Co., it already having developed
by drill and underground workings
between 100000 and 5000, 600 tons
of ore carrying ~ per cent to 21G
per cent copper. This is opening W
an entirely new district.
The Miami property, near Globe,
located in the Pinal schist, has made
a most brilliant record in the short
time it has been under development
II can be conservatively stated that
developments to date have establish
ed ore reserves of 100000 tons
ranging from 2k percent to per
cent copper, and averaging "a pei
cent. This is unquestionably the mos
important development in the Globe
district since the first demonstration
of the extent of the Old Dominion ore
bodies. It bids fair to increase enor
mously the productive area and out
put of that district
Near Silver Lake, New Mexico, we
visited the properties of the BurTo
Mountain Copper Co. controlled by
the Leopolds of Chicago and Phelps
Dodge & Co., and the Chemung Cop
per Co. controlled by the Cole-Ryan
interests. These porphyTy deposits
average about az per cent in the Bur
TO Mountain and over per cent in
tho CV1S3rs1uru hn fg 3Ir I,
milling ore, though on a small scale
The latter is still developing. These
properties vary from those previously
mentioned in that they more closely
resemble the vein deposits. and there
fore the mining. costs will be some
what higher, which, coupled with high
or iron contents, will offset to a Ger
tain extent the difference in grade.
While at Globe we also inspected
the Old Dominion and United Globe
property and at the west vein the
Old Dominion from the 10th to the
18th levels The increase in tonnage
of sulphide ores is most gratifying
to the management.
we also visited the Arizona Com
-nercial and Superior & Boston, a
Globe, each Of which is opening up tn
Black Hawk vein, which carries
chutes of good grade OF oxide COP
per ores. The Black Hawk vein de
velopments the next few months vii
be watched with considerable inter
est s..
Notwithstanding the stimulus Civ
en- to the search for copper mines b
the high prices of the metal a yea
or more ago, l feel that there hav
been relatively few properties deye
oped to point where large produ'
ton can be counted upon and the no.
NAL increase in the use Of copper an
the diminution of production is tn
older mines will, in my opinion, full
consume this new production and
therefore feel very sure as to the u
innate position of the metal.