The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1908-11-01
CHAS. HAYDEN TALKS
ABOUT P0RPHYRY MINES

Charles HAYDEN has Just returned
from month s trip in the west IN com
pany with D. G. Jackling, A. Chester
Beatty and other wellknown mining
men. He says:
9sThe object OF our trip was TO study
discoveries and developments Of low
grade disseminated copper ores whicn
occur in porphyries and schists, as | be-
lieve that they are TO become the lead
ing factors in the production or copper,
The Utah Copper company was the plo,,
neer in the successful working out OF
the problem Of handling these low
grade ores and equaling or betterlng the
cost of production heretofore attained
by the higher grade vein mines. There
is nothing new TO report at that prop
erty other than that everything is work
ing satisfactorily and the capacity and
output are constantly increasing.
"Nevada Consolidated, which Hay
den, Stone & Co. brought out about four
years ago, was the second large CONNER
cial success in the development and
treatment Of these poyphyries. very
promising property Is now being Tgor.
ously developed at Kelvin, AriZ., by the
Ray Consolidated Copper company. 1T al
ready having developed, by drill and
underground workings, between 4,000.-
600 and 100000 tons OF ore carrying
2h to 2ia per cent copper. This is
opening uD an entirely new district.
1.-The Miami property, near Globe, To-
Gated IN the Pinal schist, has made a
most brilliant record in the short time
IL has been under development. II can
be conservativelY stated that develop
meuts TO date have established ore re-
serves Of 100000 tons ranging from
2la to 3 per cent copper, and averaging
PA per cent. This is unquestionably
the most important development in the
Globe district since the first demonstra-
tion of the extent of the Old Dominion
ore bodies. II bids fair to increase enor-
mously the productive area and output
of that district.
"'Near Silver Lake, \. NJ, we visited
the properties OF the Burro Mountain
Copper company, controlled by the Leo
polds OF Chicago and Phelps, Dodge 6
Co, and the Chemung Copper company,
controlled by the Cole RYAN interests,
These porphyry deposits average about
313 per cent in the Burro Mountain
and over per cent in the Chemunp.
The former is already milling ore,
though on small scale. The latter is
still developing. These properties vary
from those previously mentioned in that
they more closely resemble the vein de.
poslts, and therefore the mining costs
Will be somewhat higher, which. coupled
with higher iron contents, will offset to
a certain extent the difference in grade.
nile dl OlODe we also llSpecte6
the Old Dominion and saw the new ore
bodies, both at the east end running
INTO the United Globe property and al
the west vein the Old Dominion from
the tenth. to the fourteenth level. The
increase IN tonnage of sulphide ores is
most gratifying TO the management We
also visited the Arizona Commercial and
superior d Boston, at Globe. each of
which IS opening up the Black Hawk
VEN, which carries chutes OF good
grade OF oxide copper ores. The Black
haWk VEN Developments the next few
months Will be watched with considers.
BILE interest.
.. Notwithstanding the stimulus given
70 the search for copper mines by the
high prices, Of the metal wear or more ore
ago, L feel that there have been rela.
tlvely Few properties developed 10 ,
point where a large production can he
IN the use OF copper and the diminpt;on
or production IN the older mines viii
IN my opinion, fully. consume this new new
production, and / therefore feel rer,.
sure as to the ultimate position NJ fbs
metal. Boston News Burean,