The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1906-09-24
FIRST WORKED AS
A GOLD MINE
Utah Consolidated Property Did
Not Make Copper Ship
ment Until 1896,
ONE OF GREATEST
MINES OF WEST
Bingham Company Pays Strict
Attention to Details in All
Departments.
The Utah Consolidated company was

group OF cl3llaS aG INC hGdu y! E"Ii
! fork of Bingham canyon, the principal
| claim of which was the Highland Boy,
SAYS the Engineering and Mining Jour,
| nal In the course of mining the gold
| ores occurring at the surface un
| deriving sulphidc ores had been tound
in several places, but 1t was not untlI
| December 1896. when tho Highland BOY
| mine shipped 5000 tons of ore that the
| copper resources of Bingham canyon
| began TO be appreciated The company
| also equipped the stamp mill, which had
been used while developing the oMdlZed
| gold ores, with a cyanide plant, IN or
| der to increase the percentage OF eX-
| traction of gold, which, by simple ANAL
eamation. was gradually decreasing
with the increase in depth and conse-
oIent increase in copper contents. ihlS
| cyanide plant was run from September,
| 1897, until April, 1898; from loVV TO
| 1000 tons of ore, averaging about S6.5O,
| were leached each month and a saving
| of so per cent of the gold was made,
| Owing to the copper contents OF the ore,
| however the consumption OF cyanide
was very high, and finally the process
| was abandoned, not being commerclaliy
successful, Some of the silicious gold
Gaping is now mined from time to time
and used for lining for the furnaces at
the company's smetcr. Since the aban-
| doning of the cyanide treatment of the
ore. the company has confined itself to
exploiting the copper ores,
The Highland ore body occurs as
large plum shaped deposits of iron sui
| phidc, CARRYING cbalCopyrltc and some
! bornite and chalcocitc, in limestone
belt having a general east and west
| strike and dipping northward at from
| % TO 80 degrees. These ore bodies oc-
! cur as replacement deposits IN the lime
stone, and appear to owe their origin 10
| a series of nearly vertical assures, hay-
| L.. ,C IN % Ip
east. These ore bodies are steep IN DIP
near the surface, but become tlatter
| in depth, the dip averaging about 10
| degrees toward the north. They are
large, being sometimes 100 feet wide
and generally about $50 TO 200 feet
long; IN one instance over 9Oo teet. sew
! eral of these ore bodies occur on one
| level. being separated by barren bars
| of limestone. Considerable develop
ment is being done and new ore bodies
are being found. Apparently there are
FIVE different ore zones cutting along
! the limestone, which is about $50 TO 800
| feet in thickness. On each side Of the
| limestone are bands of quartZitc. Cut
ting the series of sedimentaries IN
which thes ore bodies occur is a series
! Of poTpbyTy dikes, TO which 1T is
! thought the orc bodies owe their forma-
! ton
The Highland Boy is one of the most
| SN6lelDdllcuuN bpiIditu IlllltS IL llAO
! West. The company has It's own smelt-
er at Bingham Junction, while at the
mine there is not only an assayer, but
also geologist and "A surveyor. This
presence of a geologist at the mine is
purely for the benefit derived from his
services in developing the ore bodies,
and not in any way due TO the spur of
customary map, showing the drifts on
each level and the different raises,
made, but also several other maps are
kept. These are "fioor maps the as
say map, and the geological map. All
of these except the asasy map are on a
scale of 90 feet to the inch: To aid in
| locating points. these different maps
have been blocked of by a series of
co-ordinates, 500 feet apart. running
both east and west. and north and
south. The floor maps consist Of q Sc
ries of tracings arranged in order, one
above the other, on each sheet of which
are kept all the workings of the mine
on that floor. On it is also shown the
direction of any faults cutting the ore
bodies. On top Of the floor maps is
placed a tracing showing the contours
Of the surface Of the mining claims. BY
referring to this contour map the depth
of any set in any Of the floors can be
mining ore bodies occurring near the
surface IN region so rugged as Bing-
ham,
Attention to Detail
A geological map is kept of eacf
level, on which is shown not only the
outlines Of the ore bodies and the
boundaries of the different sediment
aries and dikes but also the strike anc
dip of all fissures shown up by develop
ment work. A sampler takes daily
samples of each round of ground broker
in the drifts and of every set of GROUND
broken in the slopes, The samples arr
assayed for gold, silver and copper
The percentage Of copper determined
in each of these samples is noted on thu
assay maps which are kept in loose
leaf book. The pages Of this book arr
thirty inches long by twenty-onc inche
wide. In the margin, one inch wide, a
the top, there are spaces for the numbe
of the floor, the name of the stopc ant
level and also for the name of the orr
body to which the stopo belongs. Th
rest of the page, thirty inches long an'
twenty inches wide. is divided int
| blocks five sets square, a zero set 4
taken for each stope and this is KEEP
throughout the different floors of tina
stope. The sets are numbered both eas
and west from this set. In each OF thes
squares is written the percentage o
. copper in the sample from the set whic
it represents, together with the day
| month ana year, on WUlcH luS SaIHlPi
was taken. To assist the eye in deter
mining the monthly progress tn
squares, representing the sets of groun
taken out each month. are outlines
i in colors. different color being nse
for every month of the year. f'ror
each page there extends an ear, o
T. which is given the floor and the nam
o Of the stope so that one can readjl
! turn to any floor of any stope and dc
;. termine not only the ore averages j
o each set Of il, but also the monthl
A stope book is also kept by the rs
= sayer in which the sets in each stop
are diagrammed There is also a mode
Of the mine, which is also brought u
T to date from time to time, 1t IS con
y posed Of plates of glass representa-
! each level, placed in 1 series ,a,as Of snelve We