The semi-weekly miner. [volume] (Butte, Mont.) 1882-1886, 1883-11-28
From the Delly Of Sunday.
THE HARRIS TUNNEL.

From the Deily Of Sunday.
THE HARRIS TUNNEL. .
Ever since the development Of the
rich copper-silver leads in the Ana
eonda and st. Lawrence mines, oper-
ations in the Harris tunnel, on the
Johnstown, Little Idahoan and
Pennsylvania claims, which join the
st. Lawrence on the east, have been
regarded with great interest. The
three claims are each full size, 1900
by 600 feet, extending east and west,
the Pennsylvania lying south Of the
others, the Johnstown on the north
side and the Idahoan between the
two. There is also fraction 200 feet
wide and the full length of tie claim
lying north of the Pennsylvania,
which has been added to that property
by purchase. The tunnel was started
on the Pennsylvania ground 500 feet
from the western line and $50 feet
from the southern line Of the claim,
and has been run into the hill,
trending point east Of north. a
distance of l,142 feet. The country
rock the entire distance is micacious
granite, and the ground is so solid
that it has not been found necessary
to use a stick of timber in the tunnel.
A number of small veins have been
cut through all bearing the same
characteristics Of quartz, carrying
grey sulphurets Of silver, with pock-
cts Of decomposed quartz ndxed with
carbonates. Some of these carbon
ates assay as high as 200 ounces Of sill
VT per ton. At q point 200 feet from
themouth of the tunnel q ledge has
bee6 cut, with we'll defined foot and
!. hanging walls, which shows width
fof over 20 feet, the vein matter show
ing iow grade quartz the entire
Width, with here and there thin
streak of high grade sulphurets, or a
crevasse Of the deco'nposed quartz,
mixed with carbonates, referred to
above. Four hundred feet further
/, on a similar ledge about five feet
wide has been cut through, and
little farther on thin vein
of quartzite imbedded In
carbonates Of lime, and rich in blue
sulphurets Of silver, with pyrites of
iron, comes in strong on the east side
of the tunnel. , AT 100 feet strong
vein IL to is feet wide Of sulphuret
ore, much Of which is decomposed,
and all Of it free milling, was pene-
trated. A west drift and upraise on
this ledge fully proves its extent and
value as well as that its general char
acteristics are the same as those Of
the free milling ore taken from the
upper levels Of the Anaconda and st.
Lawrence, and it is believed to be an
extension of the great silver bearing
ledge of those mines which developed
into the rich copper-silver lead now
being worked in the lower levels. The
tunnel strikes this ledge at depth of
Az feet froLl the surface, which is
about on level with the 400 loot
level of the Anaconda. 1t was at
the 600 in the latter mine that
the sulphuretic character Of
the ore ceased and
the copper-silver ore began to come
i1 strong. tho ugh the best ore of the
latter character was developed at a
greater depth, and it is believed that
a winze sunk from the tunnel lead
would run into copper-silver ore at a
depth of 200 feet, thus proving 1t to be
the true Anaconda lead. The re-
naming AZ feet from this lead to the
| breasts of the tunnel is in micacious
granite, the breasts showing the We y
white and compact porphyritic
granite which is characteristic of the
Lewis & Blodgett tunnel in the Big
Butte, in which copper traces are
found in abundance. This valuable
property is owned by Harris, Lloyd
& Co., who, it is understood, are in
negotiation with representative OF
London capital for its sale. Should
the negotiations result in sale the
| Londoners will secure a property
which will give them no cause in the
future to complain of Montana min
ing ventures.