Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1906-07-31
WALKER ON
BOSTON CON.
Bingham Mine viii Become Great
er Dividend Payer Than the
Calumet and Hecla.
THE BIG PORPHYRY DEPOSIT.
Figures Given ON Costs OF Mining and
Milllng-What Mine VIII
Produce.

That George L. Walker. the Boston
copper authority. was very fayorabh'
impressed with Boston Consolidated IS
result OF his recent visit to that big
Bingham property Is very forceably told
IN the current issue OF ;he Boston Conc
mercial. lie says there Is no doubt in
his mind that fl viii become a big div
ldend payer and agrees with some Of
The experts that have examined the
NINE that 1t win make q greater velvet
getter than the Calumet s. Hecla or the
boston q Montana.
But we must remember. 81 course, -
says Mr.. Walker. that these inyesti-
cations and tests are not always fully
confirmed by actual operating results.
In this particular instance. the men
who have thoroughly acquainted them-
selves with the Boston Consolidated
Trperty are certainly Canable ~ reach
ing accurate conclusions In matters Of
this nature. The sampling and mill
tests were conducted by men whose
education and experience fitted them
10 do reliable work II they have not
crrer, there are 500. 900 900 in dividends
TO come out OF the Boston Consolidated
praSerty. and perhaps twice this
amount.
THE PORPHYRY DEPOSIT.
THE porphyry deposit Of the Boston
Consolidated has been tested and prov
- over an area of 5000 feet long and
300 feet wide II Is opened by Is tun-
nels. and each Of them shows from 30
20 70 feet Of leached rock and waste
lying on top OF the porphyry rock,
through which is disseminated. with
wonderful uniformity. small crystals OF
hornte. chalcocite and chalcopyrlts.
This rock assays from ~ per cent TO
"a per cent copper. and tts variations
beyond these figures are extremely
rare. There is probably no other mine
except that Of the Utah Copper, which
udjoins, which has an ore that varies
so little in IT'S mineral contents or aver
age value
THE borniie and chalcocite are Of
course. secondary enrichment minerals,
and the secondary enrichment zone In
this pofphyry runs from 200 TO 800 feet
thick probably averaging over goo feet
NnFNuknUul llAt fNlllt hlfds Al tue W.
pcsit proves 10 be as large as indicated
and only 200 feet thick, Il will contain
total OF l25 900 900 tons Of poryhyry
ore; II 300 feet thick, lS,5OO0OO tons OF
ore
"The management believes that this
ieposit carries am average Of Of least
IS pounds Of copper and IS cents 10 80
cents I'm gold and silver 70 the ton.
MN tests indicate that 70 per cent Of
the copper contents. or q pounds 10 the
ton. can be recovered. To be conserva-
tive I will figure the value Of this ore
on the basis Of q recovery Of % pounds
" copper and 25 cents per ton IN gold
and silver. on q l5-cent copper mar
ket the value OF this yield would be
u per ton. Therefore, II the cost ~
handling, including all expenses ~
operations and management. amount to
- per ton. Il may be expected that this
ieposit will yield 81 per ton. or tl25.-
900 600 in net profits for stockholders.
AS To OPERATING COSTS.
THE management has made very
careful investigation OF operating costs
and has planned a system which IL
expected TO handle the ore extract and
market us product and pay an other
expenses FOR a total Of about $40 per
ton Unless some mistake has been
made IN this connection, therefore, OPP
timlsts may figure the net value OF
this great porphyry deposit al $500
100000. or more than twice the amount
the great calumet & Hccla has so far
disbursed IN dividends
THE porphyry deposit Of the Boston
Consolidated company stretches along
the side Of a mountain. while that Of
It's nelghhor. the Utah Copper compa-
ny. occupies the valley and stretches
lp the mountain on the opposite side
The Boston Consolidated has built sew
sral lines Of railroad track back and
forth on the mountain side, and has
recently put one great steam shovel iu
commission stripping the surface from
he ore body. Arrangements have been
made for dumping ground Ia the Ia
vines and canyons IN the immediate
vicinity, partly on the company's own
ground and partly on adjoining proper
ties where the company has secured
surface rights II Is proposed to use
Ave marrow gauge locomotives with a
arge number Of cars and 20 quarry
iown and remove this leached deposit
until the surface ~ the ore body is
exposed hittl winch iAe ore VIII ba
be- 1usfried down in benches. % feet vide,
and also handled with steam shovels
II IL claimed that each shovel will han
de 1900 tons OF ore daily and that rs
total crew will be only 81 men, making
the output 80 tons Of ore per man.
Those who have Investigated say
that steam shovel mining is being done
hy one company az as low a cost a. Z
cents per ton The cost IN the Lake
Superior iron districts Is believed "a
he 70 "a 20 cents per ton. Boston Con-
solidated experts think It's porphyry
deposit can be mined az a cost ~ z
cents per ton. that hauling and hand
ling viii not cost over 20 cents per ton
Othe contract with the Rio Grands
Western being g cents per ton OF or,
from Bingham 10 Garfield, that MILL
Ink will cost 90 cents 90 "a cents and
that an other expenses including smch.
INK. refining selling and management
viii be covered Tor 81 per tom ~ ore.
"The decision ~ the Boston ConsolI
dsthed company IN use gravity stampi