The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1911-10-05
Directors Order Property to
BE Prepared for Out
put Speedily.
BIG TONNAGE BLOCKED
Ores Known Valued Above
Eight Million Dollars,
Which IS Net.


all stockholders that the directors on
September rs instructed him to forward
To all interested a copy of the engineers
report nn mine conditions, and also that
immediate steps would bc taken towards
tho building of a l50o-ton mlIl and per.
manent equipment of the properties. that
Tie production day might be brought TO
view without delay Engineers Weed and
Pi"bcrt estimate Jhat the cost OF mill
installation and OF preparing The mine
Tor production will he Approximately ST.
500, 400
Tho following is portion OF their re-
port
'"rhc board Of directors have requested
review of tho progress made I'm the
development OF your property during the
eight months ending August 81. 1871.
together with an estimate Of tonnage and
plans for putting tho property on a pro
ducing basis. II VIII hc remembered
that our estimate OF tonnage on Janu-
AIRY !, last, was 900, 600 tons of actual
orc and 100000 tons Of probable orc.
all Of an average assay value OF > -
per cont copper Since that time the
work done has greatly enhanced tho
valu" of the Globe Isabella group and
its real value can now be fairly def
nIToiN stated
Nearly an development work has been
at tho fourth level and the results OBJ
tions. Having proven the limits of the
ore body Ivy churn drilling and under
ground work il is possible al this time
20 plan for permanent equipment and
carly extraction.
Description of Work.
Eight churn-dril holes agercgating
l@iA feet, were pui down on the Globe
Isabella group, four I'm the tnwnsitc with
negative results as tn The extension Of
tho orc body TO tho cast property line.
showing 70 feet OF 80 per cent ore and
100 feet OF 3.09 per cent respectively. The
two holes i'm the west end proved the cX
istenCc Of small area OF mncralizcd
schist under tho diabaSe, thus increas-
ing the reserves at this end OF the prop
erty, The cost of drilling. including sup
plies used labor. fuel roads etc. was
So per foot. which compares favor
ably, with any drilling operations in the
Underground. a54S feet Of work have
been done. consisting Of 1926 feet OF
drifts. 40 feet OF wines and 252 feet
OF raises. In all the Globe Isabella group
is proven by 25.93O feet OF work. in
cludIng 5io2 feet Of churn drilling. The
glass model on exhibition in the com
pany's office shows at a glance the char
actcr OF this work and the orc reserves
that have been developed.
In the January estimate the probable
orc, being then undevelopcd, was given
tho same average assay value as the
actual ore. Our recent work has shown
that on tho fourth level very much
higher average obtains so that the gen
eral average is proportionately Increased,
We have also developed an area OF un-
usually high grade orc which has raised
the average ASSAY value OF tho whole
mine from 2.15 per cent 10 2.5l per cent.
How Ore Is Blocked,
THE method or blocking out orc re-
serves Is the same as is used a. Miami
and at Ray Consolidated Levels are
run AT intervals Of 100 feet and the min
oraliZcd area proven by drifts and cross
cuts dividing the ground up into ZOO
foot blocks primarily with winzes and
raises TO prove the thickness Of the ore
body Much OF your ground has been
dissected into 30 and 100 foot blocks so
that the average assay value OF orc de-
veioped is as accurate can be OBJ
tanned. Al assays are clectrovtc.
THE tonnage is computed from three
sets OF sections. each having the min
eralizcd area carefully mapped. The
greatest care has been exercised III this
revision OF tonnage.
The development OF the high grade
orc body on the fourth level has, as
mentioned above. raised the average val
ne Of the whole so thai We give as total
tonnage of available ore I.5st.000 tons
average 2.5i per cent copper The high
grade ore body IS a solid block Of ground
5000 tons. averaging 5.S3 per
cent. and as this should be mined sep
arately, We figure the actual ore re-
serves OF the Globe Isabella group as
$4,000 tons. averaging 5.S2 per cent. and
8 1000 tons. averaging 2l9 per cent.
this group is practically finished.
Equipment Plans.
"Plans for permanent equipment and
early extraction Of tho ore are now be
ing made. Ii Is proposed TO mine The
rich orc first while preparing the lower
grade orc body for caying. No difficulty
wha tsoeycr is anticipated In mining the
high grade ore body. but because OF Its
greater value. greater care and more i'm
proved methods must be used in lis eX-
traction. The estimated cost OF handling
This ore is itemizcd below:
Mining CHring methods) ............s2.O 90
Mlliing ............ ........'...........- 30
transportation ..-....-.....s..s--,. 10
General expense .................... %
Smelling. refining and marketing -. 2.S5
Total ................................s5. .s5.75
we have assumed - per cent eN-
ira Ction In the mill. as the high grade
ore IS the cleancst In the mine and
should concentrate without any difficulty,
Actual practice may show SO per cent. \
concentration OF six tons into one is fig
nred on and smelling charge or $5
per ton of concentrate Assuming the
tanned copper, less q cents New York
quotations and l5-cent copper mar
ket. The high grade ore should yield s.
per ton net production cost OF cents
per pound exclusive OF amortization and |
interest
The lOw-graGe ore body will he mined
nN one or other WpQlncatloN OF the cav
ing method. now in successful operation
~ Miami and Ray Consoldsted A. the
asst mentioned mine. We arc Informed on
excellent authority that this system ls
working even better than WIS anticl
natcd. and insgmuch as tho Ray Central
las part % the same ore BODY. We should /
be guided and benefited by the expert |
ence or our nciEhbors in both mining
and milling practice.
"Of the 6 7oO. 600 tons actual low grade
,yc. about 70 per cent may he lost ow-
nE 10 tho proposed method Of mining
and the local irregularities In the upper
and under surface OF the ore body Prob |
sbv 5000. 600 tons viii be extracted from
the ore body already developed The |
iEures given as the probable cost % |
mining. etc. fI2.97 per tom iu our fun
report ~ January. would, applied 10 this /
pre- show profit ~ 9n cents per ton. |
NJ production cost or approximately n
,ents rer pound marketed IN New York ]
with these conservative estimates % 1
cost ~ production. the net value cf the /
available orc is:
iurh grade .....................ts .ss5. 600 |
-ov grade Observation-Disclosures. 800 600 4
Total .........-.....-...... s. 5s5. 900 /
'rHo success which has attended the |