The Arizona copper camp., 1916-05-12

work that old Renfro undertook so
not been there the company's plan
Of development would have been diff
ferent; as it is, a month or so may
demonstrate that the ore goes down,
that the Pinal Development company
has one of the big things of the
southwest. The tunnel is now in 1850
feet and is going forward at the rate
of foot a day. Allowing for the
probable dip, the New Year fault,
which it is being driven to intersect,
is between 25 and SO feet ahead.
Though the formation is an extremely
hard diabase, in which ore never
makes" flecks of green stain are fire.
quently encountered in the face of the
tunnel.
Three faults cut across the Pinal
Development company's ground from
east to west. The northernmost fault
is called the New Year; south lie the
Eelen and Uncle Sam faults, several
hundred feet apart. No work has
been done on the Helen or Uncle
Sam.
wash cuts through these faults
north and south, and to the east
rises long high hill. or mountain.
The faults show bold and strong on
the west side of the hill. To the
north of the New Year, and appar-
ently dipping into it, is minor fault.
The formation along the faults is the
same as in the Bisbee and Globe
mines and at the Magma.
The main working. of course, is the
tunnel, started far to the northwest
to cut the New Year fault at 500
feet. Some work has been done on
this fault near the summit of the
mountain. A tunnel was run in $50
feet and a winze sunk fifty feet on
ore. Now another winze has been
started only few feet from the
mouth of the tunnel It is to be
continued indefinitely and eventually
will be connected with the long tun-
mel
All the fault filling carries copper
but it is plain to see that most of
the metal has been leached out. The
signs of copper extend even to the
country rock outside the fault en-
tirely. There is not a doubt that far
back in prehistoric ages a tremendous
amount of copper was washed to
regions below, and when the zone of
secondary enrichment is found old
Bob Renfro's dream will come true.
Some distance to the north of this
working is the Roman Eagle tunnel,
started on the minor fault mentioned
above. This tunnel is now in 100
feet, all through leached ground, and
ore shows ten feet wide in a cross
cut. This ore is oxide and car
Donate. Since the tenth day of last
month 25 tons of it have been ex-
tracted and it now lies on the dump
ready for shipping. 1t averages at
least. twenty per cent copper and
carries important gold values. Su-
perintendent Charles Hollister esti-
mates that its sale would more than
pay the entire cost Of operations at
the Pinal Development since the ex-
traction Of the ore was commenced.
The location of the Renfro group
is most advantageous. Erman siding,
on the Phoenix & Eastern railroad
Is less than six miles away by road
in an air line the siding is only four
miles distant. The construction of
an aerial tram from the mine to
Erman is one of the possibilities.
There are few more attractive
camps than that of the Pinal Devel-
opment company. 1t lies on the north
slope of what is known as the Drip
ping Springs range. and is cool even
on midsummer days. A splendid
spring, which flows a large stream
the year around. is one of its attrac-
tions. The camp has no permanent
buildings but the inhabitants are COM
fortably quartered in ten houses. Su-
perintendent Hollister and several of
the sixteen miners under him have
their families with them.
Troy Arizona
Adjoining the Pinal Development
company's group on the west Is the
old Troy Manhattan mine, which also
has great copper possibilities. The
Troy Manhattan company was re-
Gently reorganized as the Troy-Ari-
zona. New interests are back of the
concern and active development is
being resumed. The Rather shaft, it
is understood, is to be sunk to depth.
Vanadium!
Less than a mile southeast Of Troy
is the biggest known deposit of
vanadium ore in the United States.
Many people in the Ray country know
this but they do not realize the sig
nificance of the fact It's significance
is likely to be brought home to them
soon, for the U. S. Vanadium Devel-
opment company Is to place 100-