The news-herald., 1901-12-28
ARIZONAMINES
Regarded with Favor in
the Far East.
The Boston Journal for investors Speaks
the Truth in a Leading Editorial About
Arizona Mines and the Mining Indus.
try in This Territory.

Inc following lntelllgent edltOr-
ial from the Boston Journal for In
vestors is an illustration of the
more intelligent manner in which
Arizona mining is now discussed
by the financial journals of the
east:
"A striking feature of the general
interest attracted to mining during
the last half dozen years has been
the renaissance of Arizona mines.
A widely extended and profitable
mining industry has been develop
ed from supposedly decadent in
dustry. The criticism of unsuc-
cessful miners who did not dig
down, that Arizona mines had no
depth, has been disproved by the
successful miners why have dug
mines down to great depths. At
the same time Arizona mines have
been found to have great breadth
as well as depth. The mines are
notable for the enormous ore bod
les that extended working has dis
closed.
"The great change in Arizona
mines from what they were a doz-
en- years since to what they are
now can be attributed principally
to the increased value of copper
and to the improvements in mod
ern metallurgical methods. The
increased value of copper made
ores, formerly unavailable, COM
mercially desirable. Improved
metallurgy cheapened the cost of
their treatment and increased the
margin of possible profit.
cold mines-the great silver and
gold producers of twenty and thirty
years ago-have been reopened to
work greater depth, and to secure
the copper bearing ores that were
then left in the mine as too base
or too low to justify mining and
treatment for the gold and silver
they carried. Now these ores are
the basis of a greater mining in
dustry than their appearance was
supposed to have destroyed.
''The physical conditions make
Arizona mineral deposits part of
the system developed even more
extensively in northwestern Mex
leo. Copper is the principal metal.
The original asulphide minerals
have been largely oxidized and
secondary deposition has concen-
trated the values in large, easily
minable deposits. In this develop
ment of the oxide and carbonate
ores, Arizona mines have had a
considerable advantage over most
copper mines in other districts.
Also, as the sulphide ores are reach
ed with depth, they are found to
average high in copper and to carry,
as rule, exceedingly high values
in gold and silver, notably the
| former.
"Much of the mining work going
on in Arizona during the last two
years consists in the opening Of
great metal-bearing deposits and
in their equipment with metallur-
gical plants. In nearly every
county of the territory new mines
have been opened, developed and
equipped without the aggregate OF
this work attracting attention. In
nearly every county in the terri
tory a large proportion of the ole
mines are being reopened. This is
true, not only of the old mines that
were worked as free-milling golo
and silver propositions down to the
zone of copper-bearing sulphides
and then abandoned, but is equally
true of the great silver mines, which
have had the same kind of a record
of free-milling exploitation of upper
levels and abandonment by reason
of the incoming of water with depth
or the exhaustion of the first be-
nanza ore body.
"It used to be said, once silver
mine always silver mine. Now
the experience accumulated in
Arizona and other western mines
which for time was supposed tc
disprove it, has confirmed and
rather improved it. The once sill
yer mines are not only still silver
mines, but they are copper mines
and gold mines as well.
"The new Arizona mining is diff
ferent from the old, which had con
siderable of the effect of Mexican
association in it's methods. The
mines were worked near the sur