The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1920-01-15

The ore is concentrated in a mill
whose daily rated capacity is $50 tons,
but at the time OF visit from 50 10 100
tons day Was being treated. The
equipment consisted of rolls. jigs, Will
fey tables, and Callow flotation tanks.
During the fall of 1915 a large tube
mill and several flotation cells We're
added to uhis equipment and increased
the mill capacity to IFS tons a day. The
present extraction is about "a per cent
of the assay value of the ore. but with
finer grinding in the tube mill the ex-
traction will probably be increased ana
"a better product obtained The zinc
concentrates assay from 81 to II per
cent of zinc, per cent of lead three
ounces of silver to the ton. and five
to seven per cent of iron. the lead
concentrates, % per cent Of lead 10
ounces of silver to the ton, and to s
per cent of iron. From October. 1915.
TO June 1915, about 1900 tons of zine
concentrates and 275 tons of lead con-
eentrates had been shipped.
Nevada Stewart.
The Nevada Stewart is on the north
side Of Stewart creek, about half
mile west of the Highland Surprise
mine. The principal opening is tun-
ned at the creek level driven north 20
degrees east for 500 feet. An upper
tunnel that is probably not over 200
amount of development work but it
was not visited. At the face of the
lower tunnel thinly banded Prichard
slates strike north 20 degrees east and
dip 80 degrees west, but in the outer
part of the tunnel the formation is
much contorted AT 500 feet from the
portal the drift intersects a fault which
trends north IS degrees west and dips
steeply south. This fault is probably
the same fracture as that in which the
Highland Surprise vein occurs, as
both are in alinement and have prac-
tically the same course. The fault is
explored by drift driven 275 feet
east. The fault zone is about feet
wide between well-defined slickensided
walls. 1t is said to have contained
some galena and sphalerite, though
only pyrite was observed in the face
of the drift The company had sus-
pended erations a short time before
the writer's visit
Hilarity.
The Hilarity prospect is on Denver
creek mile from dts mouth The
group comprises seven unpatented
claims. Two tunnels on opposite sides
of Denver creek explore vein which
trends north 80 degrees west. In the
north tunnel about 500 feet of work
has ben done, and in the south tunnel
$50 feet. The vein occurs along slip
in BLUSH and gray shales of the Prich-
ard forma ton which dip 80 degrees
southwest In the south drift the ore
ranges from inches to feet in
width in the north tunnel it is dis
seminated in scattered small lenses.
The ore is of low grade and consists OF
an intimate mixture of pyrite, spinal
erite, pyrrhotite, and little galena and
Quartz is the dominant
mineral, though nowhere
abundant, and calcite was noted in
places as small stalactites
Little Pttsburs.
The Little Pittsburg mine is on
Denver creek about l " miles above its
junction with the East Fork of Pine
creek. Two unpatented claims consti-
tute the group, which is owned by g.
A. Smith and Mrs. Hail. of Kellogg,
Idaho. During the winter of 1915
$50 ton mill was built and the prop
erty bonded, but the company became
involved in litigation and little work
was done. Preparations were being
made at the time of visit to reopen the
mine.
The mime is developed by two tun-
nels. 1875 feet vertically apart. The
upper tunnel at an altitude Of 1850
feet, is a crosscut 500 feet long to the
vein in which is drift of 200 feet. The
vein strikes north Is degrees west,
dips 65 degrees southwest, and cuts
beds of blue states that strike north
As degrees and dip IS degrees south
west. The ore ranges from four to Il
feet in width and has fairly well de-
fined walls. In the upper tunnel the
vein is cut by fault which strikes
north AZ degrees west and dips GO de-
g,ees southwest, and the ore is dis
placed - feet to the east. Very little
ore has been taken out; at one place
q stone is 25 feet above the tunnel.
The ore is a fine grained mixture o.
sphalerite, galena, pyrite, pyrrhotite
and chalcopyrite with quartz and uh
replaced wall-rock gangue. Reported
ASSAYS from samples of the mine arr
as follows: From a 21-foot face, L
10 per cent of zinc and 5 per cent
load. from another part of the vein
1G per cent of zinc. IL per cent OF lead
and % per cent of iron. The reporte'