The weekly miner. [volume] (Butte, Mont.) 1878-1881, 1880-11-23
H MINER.
THE MINES.
MAeNA cHARrA.

vciopment was made IN the north crOSScut at
a depth OF 206 feet. It will be remembered
that near the latter part of last week, at a
distance of SO feet from the shaft, several ore
pockets were discovered which were regarded
as indicative of the proximity of the ledge
and their richness in silver was so great,
that high hopes were entertained of the value
OF the main body when tapped. The face of
the crosscut was pushed forward with renew
ed energy and at a point 80 feet from the
shaft, the miners passed through what proved
to be a well defined wall, beyond which, after
the firing of several more blasts the ore body
was found to ny. Neither the width nor the
richness of the ledge has yet been ascertainef
and it will probably require some lime to pe..-
citrate to the other wall. But incomplete
though the development is, it is in the highest
degree satisfactory, for it proves what has been
disputed by a few so-called rocksharps, viz:
the continuity of the Alice ledge and not
only of the ledge but of the pay ore body |
enough having been demonstrated in the Mag
ma Charta to prove that the ore is Of more
than average richness.
NORTH STAR.
At a depth Of 63 feet, the east mt west
drifts are being extended with vigor and are
producing considerable ore. Th drift run
ming east is in 40 feet and the one running
west IS feet. The ledge, though we'll defined,
contains some worthless ledge matter, leaving
the pay ore body not more than two feet wide.
This is being extracted and shipped to the
Clipper mill which it keeps in constant oper-
alton. The level will be extended some dis
lance further, after which slopes will be
started. Some very rich ore was taken from
the shaft near the surface and the expectation
is to strike the same quality of ore in the
slopes.
The main shaft has attained a depth of 1876
feet and is still going down. In the west
drift Of the 100 foot level stopping continues
on a body of ore which varies in thickness
from four to seven feet and assays between
$l25 and 5000. The sinking of the new shaft
which was raised from the 7O-foot level to the
surface will be commenced within the next
few days on The completion Of the within. A
within house and q shaft house have been
erected during the past week, and before next
Saturday the sinking Of both the shafts will
be under Roadway.
CoIUsA.
TIL work of widening the 16O-foot level. 20
the full width of the vein having been fin
ished, stopping in the east drift has been re-
sumed, and sufficient copper ore to keep the
smelter supplied is being extracted daily.
That portion of the product which assays
higher than IS per cent. copper is bein
sacked for shipment, the low grade ore being
conveyed by the air tramway to the smelter,
where it is concentrated, desulphurized and
formed into a matte. TIL low grade ore
yields about six tons of matte daily, assaying
60 per cent. copper.
ALICE.
There are no important changes to be noted
in the development of this property. LII the
100 foot level, considerable work has been
done within the past season, but such is the
magnitude of the ore reserves, that what ore
has been taken out is scarcely missed and
of the ore bodies yet in sight. In the east
drift, the face of which is $50 feet from the
shaft, the ore body varies from Is to 40 feet
In width as shown by q series Of crosscuts ex-
tending from one wall to the other. This
drift has yielded considerable free ore lately
which has been used to mix with the product
of the lower levels for experimental purposes.
1t is not considered likely, however, that the
level will be extensively worked at present
as the character of the ore is such that it re-
suires treatment by the wet crushing process,
in order to render it available for profitable
reduction. Between the first and second lev
els there are fifteen floors Or stopes, the ore be-
ing similar In character, though Of somewhat
greater value per ton than that of level No. 1.
The vein between these levels has been
opened up to al average width of - feet,
leaving heavy reserves on either side of the
workings, which will be extracted and treated
on the erection Of the projected wet crushing
mill some years hence. Between the second
and third levels u change in the character of
the ore is noticeable, the free ore having Ell
tirely disappeared. The workings on this
level are extensive, but though the yield has
been considerable, the ore bodies appear al
most Intact. The fourth level presents a
scene Of striking activity, a considerable force
of miners being employed in extracting ore.
No attempt is being made to extract the full
width Of The vein, for the reason that the mill
is already o~versupplied. The west slopes are
being carried forward on fine looking ore
bodies, though occasionally comparatively
barren spots are met with. The 500-foot lev
ell is in splendid shape for producing purposes
and considerable improvement is noticeable
in the compactness and richness of the ore as
COMPARED with that of the upper levels.