Mohave County miner., 1911-10-28
Ray Central Copper Property.


holds 30 acres of ground practically
surrounded by the Ray Consolidated,
balance of the Central holdings being
across the creek. Frank w. Probert
is general manager and consulting en-
gineer; h. II. Mcdonald superintend-
ent and W. G. Finch mine superln-
tendent. This property has been de-
veloped to considerable extent, and
has a very excellent showing within
the worked area. Churn drills have
been operated regularly to good ad-
vantage The ground is very similar
to the Ray Consolidated. The best
showing has been made on the 1O0-foot
and 400-foot levels of the Globe
Isabelle group. On the 1OO-foot level
extension of the ore body in an easter
ly direction than was figured In any
of the earlier estimates; 81 feet of
work has been done on this level, all
in ore of good grade. 1t is believed
that this will be still further increased
as development proceeds to the south
and east. A large and rich extension
of the main ore body has been opened
up on the 400 level, and all under
ground work is now being concentra-
ted here. The work has been of a
very renumerative nature, the ore as
saying better than any place in the
mine. In one of the drifts the last l25
feet averages better than 6. Is per cent
copper, and of this so feet averages
7.56 per cent copper. In another of
the drifts the last 148 feet averages
4.4S per cent copper; and in a third the
last 30 feet averages 7.22 per cent cop
per. The breasts of all workings are
in high grade, and the showing of a
large amount of native copper is sug-
gestive of a greater thickness of the
ore body at this point than has been
supposed. The Importance of the ex-
tensive development of this high
grade ore lies in the fact that such an
enhancement IN grade is of much
large tonnages of lower grade ore.
The two holes put down on the west
end of the Globe-Isabelle group have
proven the contention of Messrs. Weed
and Probert that the diabase, which
it had been assumed limited the ore
body, was underlaid by schist, and
that the diabase itself carries ore of
commercial value. These holes have
TO date proven up 35 feet of ore in the
form of chalcocite, averaging 3.l5 per
cent, and this is a part of the property
not heretofore considered mineralized.
As it is important to prove up the
thickness of the extension of the ore
body now known and in process oil
development Oh the 400 level of the
Globe-Isabelle group, the churn drill
ing on the Calumet group has beer
temporarily abandoned. The drill:
were brought down to the east end o.
the Globe-Isabelle group, and twC
holes are now being sunk, both o
which should be in ore at approx
Imately $50 feet, and will be sunk L
a depth of at least 500 feet. 1t is plan
ned to put down other holes in thi
part of the property, and it is believed
that when this is completed a verl
gratifying revision of the report OIL
tonnages may be made. The result
of the work at the mine have not ONLY
added daily to the ore reserves, bu
have been much better than the en-
gineers had anticipated, and tn
known ore body is of greater exten
and of better values than were pre-
dicted. In my underground explora
tion l took out several samples of ex
tremely high grade ore, and ther
were great quantities of it. At on
point in one of the drifts there were
feet of glance solid. This highgrad
ore is at greater depth than was an
ticipated from observations of or
made in the district, and is thus mos
gratifying. The rich ore seems [
come in about under the creek-be
anu W IIOuO dOIOSS OHS CTeeh anu VI
der the town, though explorations i
the other direction may disclose sin
liar ore. There have been drilled SCI
feet of holes, and the highgrade wa
disclosed by the churns, at about tn
centre of the property. The develoI
ment underground is of the same ger
eral character as in the Ray Con. l
the development of the highgrad