The copper era. (Clifton, Graham County, Ariz.) 1899-1911, 1908-07-30
Miami EquaIed by Few Copper Mines.

of ore and estimate there are , 2j6.-
600 tons additional near the ends OF
the various drifts and cro>scut>: or a
total of 6. .72O, 900 tons of ore which we
are reasonably assured.
''This ore body has been opened lOjC
feet in length, 700 feet in width and
400 feet vertically
"The Miami Is already one of the
largest copper mines in the world.
and the limits of the ore body have
not been reached, the headings being
still in ORE
/ This is the statement made by j.
/ Parke Charming. consulting engineer
for the Miami Copper company, to d
representative of the Globe Belt.
/ Mr.. Canning has been here for the
past two weeks and in that time he
has made a thorough examination of
the cOmpany's mine. and as be himself
admits, the figures representing the
dimensions of the ore body and pro-
bable tonnage of ore as at present de-
veloped, are very conservative.
III OhIlihS VI d sd llOli al q ON pm
of $40 feet in the shaft has been com
pleted and the work of opening an
other level started. As the s:att
and station are in ore at that depth
it is safe to assume that with the pro-
gress of development on this new level
the tonnage of ore in sight will in
crease steadily.
The copper is found in the form of
A su phide disSe m mated through the
decomposed Pinal schist, and as Mr..
Charming stated in report to the
president of the Miami Copper com
pany, the ore deposit is in nature
similar to those of the Arizona Copper
company, the Nevada Consolidated,
Utah Copper and Boston Consolidated
companies, the ore readily yielding d
high grade concentrate by water
treatment which can easily be smelted
However, the Miami ore carries more
than per cent. copper, while the
ores of the above mentioned cOmpa-
MES do not average much better than
per cent. copper.
As shown by concentrating tests
made some time ago the ore can he
readily concentrated 10 to l and 70
pounds of copper can be recovered by
smelting. However, more recent
tests have given better results. Mr..
Williams has been carrying on tests
for the past three months at the
mine and the results have been very
satisfactory.
MIR. Claiming informs Us that these |
tests Indicate that a saving of at
least so per cent, or IS or 30 pounds |
of copper to the ton of ore can be ef |
fected, and it is estimated that the |
cost of electrolytic copper sold in New |
York will not be more than . cents
per pound.
Mr.. Claiming, in his report dated |
March y, 1lOS, estimated that with |
the first 1000 ton unit of a reduction
works in operation. giving an annual |
production of l4.OOO,0 600 pounds of cop
per, based on $50 days running time.
the profits at 12- cent copper would be
S420,OOO per annum, and at l5-cent
copper SS4O.0O0 per annum. This es-
innate was made when the ore in sight
was 2,OO0.OJO tons. Now that more
than three times that tonnage has
been developed, the company will be
justified in building concentrator of
at least 20OO ton, daily capacity.
which would make possible an annual
production OF 2S.OO0, ,OO1 pounds and
profits on II cent copper market of
81 $3.50, 900.
The management has plans practi
cally completed to- the reduction
works which are to be erected near
the mine. but no part of the construc-
tion work will be commenced until
the Gila Valley, Globe and Northern
railroad is extended from Globe to
the Miami property, distance of
about seven mileS.-Globe Belt.
rNb, -,