The Weiser signal. [volume] (Weiser, Idaho) 1890-1904, 1899-08-24
REPORT.
Concluded from First Page.)


Der l and number 2 leads are in a con-
tact of dolomite and porphyry, num-
Der / more particularly. Number 2
is also well in place. The strike Of
these leads are almost due north and
south, but their direction could be
more certainly described as north by
west and south by east, following the
bedding Of the country rock and fol-
lowing the dip.
On this property there is little or
no development, but the surface in
dications show that the vein will be
walled by granite for hanging wall
and porphyry for the foot wall. The
surface indications show garnet
quartz porphyry for the encasement
of the entire mineralized matter, but
with depth theae is no question that
the separation of the two formations
will be as previously described
"granite and porphyry" The char
acter Of the ores on surface are chal
cocyte, malachite and copper pyrites
the latter is found in the floats; the
former with development q trife Of
depth on the same vein across the
creek from this location at the same
altitude and practically the same
depth.
CHARACTER OF THE VEINS.
The character of the veins is shown
from development on the "Railroad"
mine. The "Railroad" mine is stu
ated directly east Of the "What
Cheer group, and its west line joins
the east line of the "What Cheer"
group. The RAILROAD" mine is de-
veloped to n depth of 275 feet by tun-
mel, and has an ore body at face of
tunnel IA feet wide, showing values
of 23 per cent copper, Sc 90 in gold,
and trace of silver. The vein on
the surface shows as being imprison-
ed in porphyry walls, but with depth
shows feldspathic granite hanging
wall with porphyry foot wall lu
all of the exploration and of all the
work done in this district the vein
filing shows to be bracciated country
rock in large and small masses. The
ore chutes lie next to and parallel
with the hanging wall, and invariably
on coming to the surface show a
naturalization from the lowest depth
to sun light, and are separated from
the hanging wall and vein filling by
strong independent clay gourges or
seams.
The only development work done
in the camp has been done on the
"Railroad" group. In this the ore
chutes are shown very plainly to be
filed with a banded brittle white
quartz enclosing disseminated pllu-
lar masses and fragments of the vein
filling, and also the copper bearing
mineral in the form OF disseminated
veins and masses, or gray copper re-
sembling migarite. There is also as
ISOLATED with this garnets, crystals
OF zinc blende, copper and iron
pyrtes. These minerals are we'll
disseminated through the gangue, no
part OF the quartz being absolutely
barren. 1t is conclusively shown
that the "Railroad vein is true fis-
sure vein Of very deep seated origin,
and it has been an adjusting fissure
for number of geological convul-
slons and movements of the earth's
crust, The small parallel vein in
porphyry bullying to the west belongs.
| think, to some OF the earlier adjust
ments, the fractures being taken up
in the porphyry rather than breaking
around, through and across the tough
err part Of the formation 1t is fully
and conclusively proven that the last
important adjustments caused the
formation and naturalization of the
ore chutes from the fact that the
quartz gangue contains disseminated
masses of the vein filling.
| am at loss to understand WHY
the people owning the "Railroad"
mine should have left the north ex-
exposed for location by out
siders, the surface indications on the
extention having greater showing,
and the contact and leads being bet
ter in place than ever was found on
the RAILROAD group.
DEVELOPMENT.
Nature has done more to develop
and show the mineral wealth of
this district than any work of man
This was caused by cloud burst oc-
curing in the distict in August, 1897,
eroding away the surface for fully
two miles from the bed of the west
fork OF Brown Lee creek, also the
north fork of the west fork, and a
creek commonly known as Railroad
creek. This cloud burst has moved
millions Of tons of surface dirt in
that part Of the district leaving the
leads exposed to depth OF from 80
to 20 feet, showing the strikes of
these leads and also showing clear
indication of their naturalization.
From all surface indications in this
part of the district | am OF the opin-
ion that the heavy mneralized portion