Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1906-07-28
JUDGE VEIN SYSTEM.
VIA, stan Correspondent says of Big
Park City Mine.

Claude T. Rice, stan correspondent
OF tho Engineering & Mining Journal
has contributed an article on the Daily
lLdge mine az Park City and he treats
Interestingly OF the vein system OF mat
great property. He. says:
The vein system Of the DAILY Judge
g. practically the same as that OF the
DAILY West. IL consists Of four known
deposits. The middle vein. or contact
deposit, which is an extension Of the
DAILY West-Quincy contact; the assure
corresponding TO the DAILY West 0i-02
which has been opened up below the
.2o0-foot level By several drifts: the
south OF back yein and a north vein,
probably the DAILY assure Little Is
known about this north vein II has
been opened by a crosscut from the
l.2G0.foot level. II lies about 200 feet
north OF the middle vein, and appears to
dip 10 the north.
The middle vein occurs In a roll OF
trough AZ the contact between the lime
stone and the everything quartzite. II
dips Il or 20 degrees 10 the north. This
oreoody is rich IN zinc, compared with
the other ores OF the Park City. but
lts chief value is in lead and silver.
The McSorloy stope on the 1900 and
tho Big stope on the l.260 are the newer
Developments along this contact The
orebody IN the McSorley stopo varies
from 10 10 80 feet from foot 10 hanging
an probably averages 10 feet thick. Il
has been developed by stopping and also
by system OF raises FOR a distance OF
400 feet. Ia the Big stope, on the go
foot level. the orebody u.s., In many
places. 80 feet from wall 20 wall. or 50
70 70 feet measured along the horizon
tai In both these slopes there il much
first class ore and q considerable part
OF the width Of the deposit is 50 strong.
W minerallzed that II viii pay for mill
ing. The middle vein has been de-
veloped for over 1000 feet IN new and
old workings, and the orebody has
proved fairly continuous on the 1900
foot level.
Tn the flssure, corresponding 10
Daly-West 0l-09 assure. some good ore
bodies have been developed. and much
Of II carries considerable frstolass ore.
The walls OF this assure are quartEite.
Both In the 1900 and T. i00-foot levels.
Ave fingers. or shoots, Of ore have been
developed IN a distance OF 1000 feet
along the vein. These vary from 30 10
200 feet long the distance between walls
varies from 10 Is feet. The whole
width Is not sufficiently rich to mill.
but there Is almost always a band OF
| first class ore and then quite a layer OF
second class. so that the major part OF
| the width OF the assure is we'll miner
allied. This assure deposit IN the DAILY
! Judge carries very little zine The
'atthest finger Of ore toward the SOUTH
| vest is heavily mlneralized with pyrite
| md some lead and carries about ~ IN
gold II Is said that tho gold values IN
| h. Daly-West increase toward Bonan-
"a Flat. TO the southwest. Owing TO
he sillclous character Of the majority
Of the ores treated IN the smelters ad-
| iaCent 10 Salt Lake This iron-bearinR
ne Il very desirable for fiuxing pur-
cosCs.
The Back. or south vein dips "a
lePTtes 10 the south and has been de-
vcloped for a dis.aii,, 90 i.yyy teet, De-
inning near the DAILY West end line
and going southwest. The ores In this
vein likewise occur al shoots separated
-rom earh other by barren bars. There
are three or four shoots which vary IN
| IfAAMl llNlN ~ W sNN lNfk tllu III NlAAt
| rom 10 L. feet. The orebodles In the
latk vein have not Yet been thorough
y developed.
The DAILY Judge orebbdy Is opened
lp by a series Of levels driven from d
'hree-compartment shaft. This has two
hosting compartments 4isx5 feet In the
,lear IN tie ladder compartment are
placed the 3-inch air pipe and also thu
vertical Underway. The shaft ls tim,
bcred with ordinary l2xl2-inCh Oregon
pine sets placed with 5.foot centers. snc
Jagged with 3-inch vertical planks.
Levels have been run from THU
shaft. and stations cut. az 800. 700 !. 200
400, 1900 and 500 feet. The station,
are is feet vide and are about 10 fee
high next the shaft They are tlmberet
With lgxi2-lnch native pine. cons!stinl
Of two posts and cap. These are lagget
on top and at the sides with 2-incl
( plank& The stations are laid with
double tracks extending 30 feet iron
the shaft, and are f0ored With plank,
covered with iron sheets Besides thes
levels there are several blind levels
such as the go and the 800 and 9th
ers In the upper workings.
'TwO-compartment raises. Consistlnl
Of chute and man-way. are carried NJ
az intervals Of 100 feet IN the orebodies
The ore Is mined by overland stopne
with hand and machine drilling. tn.
hand drilling Is all SINGLE lacking. AM
about feet OF holes is a shifts worl
FOR a slngle-jecker IN the softer ore
body while only about feet can b
drilled in the hard Quartziic nllln
I which occurs IN some u the bodies
single-iaCkiug Is used because II 4
easier 20 Keep the first class separat
from the milling ore than with machin