The weekly miner. [volume] (Butte, Mont.) 1878-1881, 1880-06-08
THE MINES.
Encouraging Developments During the
Past Week.
Grcy Rock.

Grey Rock.
In the east shaft extensive prospecting is
being carried on. The crosscut north and
south from the face Of the 70-foot level has
opened up five new lodges, and while these
are being explored the extraction of ore from
the main vein is temporarily suspended. The
most promising of these new lodges is the
one discovered about twelve feet north of the
main level. 1t seems to be well defined. and
though the ore is not very rich, it assays suf-
ficiently high to pay we'll for extraction and
reduction. 1t is being developed bv a level
east and west, and as the ore is changing in
character and improving, Superintendent
Leary is confident of soon striking q good pay
shoot in at least one of the drifts. A new
ore dump has lately been built, as the one
previously used was not large enough for the
required purpose. In the west shaft in which
the "3-foot vein of pay ore was recently
opened mp, everything is lovely, and a large
amount of ore is being broken down. The
east level during the past week has penetra-
ted the'ledge about twelve feet, and as soon as
timbers can be procured the entire width of
ore will he extracted as it assays we'll from
one wall to the other. The manner
in which the ledge has widened in
the lower level as compared With its d.
mansions near the surface is most remarkable.
At the depth of 40 feet, its average
width was not more than 10 feet, yet so feet
lower the walls are fully % feet apart, and
the ore which they enclose, instead of be-
coming lower in assay value Gas is usually the
case in other districts) has actually increased
several dollars per ton. Should the width Of
the vein continue to extend with the attain
ment of depth as 1t has extended in the first
100 feet it will speedily assume phenomenal
proportions and will be capable alone Of
keeping a large mill in operation.
The Slopes from the main shaft are being
actively worked, and are yielding some very
good looking ore. From the bottom of the
west 4O~foot shaft, the crosscut north has been
extended 40 feet, and last week penetrated a
ledge in which a level is now being run. A
fair quality of free milling ore is being ex-
tracted. The crosscut will probably he still
further pushed forward in the hope of strik-
ing some blind lodges, either parallel with or
offshoots from the great Magma Charta, which
is located a few hundred feet north.
High Ore.
The Slopes in this mine are yielding a con-
siderable amount Of ore, and have been III
one place worked to the surface, showing pay
ore to the grass roots. What the High Ore
most needs for successful development is some
adequate sinking machinery. The lowest
level at present is run on the water line, and
the ore above that point though easily ex-
tracted and cleaply reduced, is not of sufi-
GENTLY high grade to insure a very heavy
margin. All the other properties adjacent to
the High Ore which have been explored be-
low the water line, like the Bell, Grey Rock
and Mountain, have shown a vast improve
ment in quality. Were Mr.. suprenant to add
75-feet to the depth of his main shaft, there
is scarcely a doubt that a magnificent body Of
high grade base ore would be discovered SIM
liar to that recently struck in the Bell, a par
allel ledge lying not more than 80 yards
north.
There are no new developments to report.
Levels 4 and ) east are Still being driven in
ore of excellent quality, but the full width of
the ledge is not being extracted. for the rea-
son that the mill could not make I'll impress
sion on the possible output, and because the
company at present have very iit'le dumping
room. Work Oh the main shaft continues
without serious difficulty, and a l-p.h of about
tlt fAat Irc,n he II rf,na lns bn,, ,tt,i,,t
Star West.
This mine continues to develop 10 the
abundant satisfaction of Superintendent Rice.
Tie east level from the 4J-inot discovery shaft
IS now III $50 feet, and The west level about
l35 feet. The character Of the ore has lately
undergone a considerable change. as about a
foot on the hangins-wall side of the ledge
carries a high percentage Of iron in the
form Of pvrit-s. This. however. does not
interfere with its value, as two assays
mad" during lie past week eacl showed 40
ounces in silver and one Of them in addition
two and one half ounces in gold, which gives
1t a total valuation of about 500. The foot
wall ore remains unchanged and ASSAYS be-
tween 200 and 300 ounces per ton. The
main shaft has reached a depth of 20 feet and
is sill! brin: pushed downward. Twenty
men are employed in the Star West, which
for a comparatively undcveioped mim'. is
certainly one of the most promising and
profitable in the district.
Cxar0,nnb.
The No. 10 Know les pulnp la, been suc-
, '~essttllly placed i'll p">Iti"n at the bottom Of
the l00-foot shaft, and hereafter no trouble
will be experienced on account of water.
From the face of the east drift and distant
from tie shaft about 80 feet 4 crosscut has