The Calumet news. [volume] (Calumet, Mich.) 1907-1938, 1911-02-22
SOUTH RANGE PROPERTIES.
Mining Expert, Arthur L. carnahan
Gives interesting information.

MINING Expert, Arthur L. carnahar
Gives interesting information.
Arthur l.. Carnahan. mining expert
for Gay 4 Sturgis, i'm an interview
gives some interesting information
Mr.. Carnahan says MANY questions
are asked about the Lake mine and its
future which are unanswerable be-
cause they hinge upon the policy of the
management. For example 'Will its
rock yield as much as % or 80 pounds
of copper per ton? Without question,
i'm a lode running from 40 TO so feet
wide, there will be large tonnages OF
rock containing scant copper values
while il is proven that portions of the
lode will be rich. out OF this character
of ground any desired mixture of rock
can be made, and undoubtedly will be
made, TO suit the conditions OF the
times. In periods Of high-priced metal
1t may be possible TO mine rock as
lean as II or Is pounds per ton, and
when rock of that grade can be worked
at a profit. and is available i'm large
volume, as IL will be in portions OF the
Lake mine. it should be taken out
This policy Of selection and rejection
governs the tonnage of commercial
rock developed by the present openings
in Lake. its "commercibility" depend
ing on the price of copper. Baltic and
champion are classed as 25-pound
propositions but it should be remem-
bered that in getting this grade of rock
almost one-half OF the lode is left be-
hind.
There is no question that the Lake
lode extends into the South Lake prop
erty at depth, but the best posted ge-
ologists of the district are unwilling TO
give an opinion as TO whether the out
crop of the lode traverses the South
Lake. or whether any of the four South
Lake lodes may be identified as the
Lake lode In my judgment, South
Lakes developments are of almost as
much Importance to Lake as to South
Lake itself. because some of the drill
holes i'm which the very rich ground
was discovered in South Lake are with
i'm less than 100 feet of the Lake boun- |
Diary. The deposit occurs in a formation
so we'll known that experience else
where may be safely used in judging /
that such ground as that discovered by /
South Lake must have at least mod /
crate extension, which would carry 1t |
over into Lake territory.
"Indianas discovery of rich copper
deposited I'm felsite is entirely without
precedent i'm the district, and as sub
sequent diamond drilling proves that
exists there entirely differ
ent from the known geology, 1t would
be idle for me to guess what that con-
dition may be. The engineers and
Of the company have de-
veloped several theories which are
tenable, and it is prodtless 20 add 20
these. The facts can be known only
by shaft and drift exploration. and as
the shaft is now under way. new theo-
ries or further guessing will not
change the plans. The proper method
has been adopted TO study the problem.
I must believe that the source from
which came the rich specimens yielded
by No. diamond drill hole is capable
Of yielding profitable copper. Nothing
more reliable than belief or opinion
can be given on the subject however.
Facts cannot be known until the
ground is opened.
Hancock will reach the Quincy
Pewabic lode probably late this year
The shaft is one Of the largest ever
sunk. and is very wet, so that the rate
lf development varies. but it appears
that 10 or Is months should carry it
down 10 the lode The operations on
he adjoining Quincy lode promise
profitable copper ground, but it
Efl not be rich because Quin
~ is not a rich mine The
amous masses which gave quincy
such a high rate Of copper per ton Of
'ock in the earlier days are not found
At depth. and Quincy's present profit
able operations are the result Of large
tonnage and good management. The
percentage Of copper that will be re-
covered from Hancock No. 3 lode will
b. matter Of policy, much as I d-
.cribe I'm regard 90 Lake. The test run
.oon 20 be started viii probably show
wide range OF nuctuation. 20 deter
nine il certain low grade parts Of the
ode can be worked at profit, and II
win finally settle down TO such a
trade as will prove profitable"