The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1916-10-12

head of the MontaZuma guIch ahou
two miles south of the town, an
forms the axis of Atlanta mountai
extending little south of west dis
lance of two and one-half miles to tn
Yuba river, beyond which It's cours
has not been determined, with the ex
eeption of few hundred feet wher
the lode intersects the joint proDert
end lines of the Petit and Monarcl
titles, the apex Of the lode is 6aepl
covered with granetlc soil.
Has Enormous Width.
AT this high point, however abou
1000 feet vertically above the tow
the lode is shown to be as much al
$50 feet wide and consists of crush
ed granetic gangue with stockworI
| OF quartz seams and more defined
courses of shattered quartz along iti
borders In the various old mine open
ings of this great lode its great size Ii
proven to be maintained at from sc
TO $50 feet in width with well defined
slicken sided walls and 1t has pro-
duced rich ore in continuous Slopes
and drifts for half a mile along its
course. II Is accompanied to the
north and south by system of close
ly parallel assures with a little differ
ent course varying from 2 to 20 feet
wide and including several properties
hat have been important producers,
notably the Minerva, Last Chance,
Big Lode and the Tahoma mines.
From the highest crest of this great
ode an excellent view of the sur
ounding mountains presents cir
3ular boundary line of high weathered
gray granite ridges ranging from
eight to nine thousand feet in eleva-
ton forming an amphitheater about
0 miles in diameter with ioWer wea-
hered ridges intervening. The coun-
try is well watered and timbered with
yellow pine, red fir and spruce,
In the immediate vicinity of At
lanta, and especially to the west the
adjacent canyons reveal numerous in
Lrusive bikes of rhyolite quartz por-
ohyry and syenite. An interesting
feature of the main lode development
s a close association with the ore
particularly in the extensive
evels of the Monarch vein of a per-
iistent black dixie of diabase looking
IA faa
he richest ore courses in the Mon
lrch are In close contact on both
walls and which appears to be older
han the naturalization and may be
is germanating cause
This dixie has also been found in
he Boise Rochester's present devel- |
4 the richest milling ore Slopes. The
Ugh values for which this great lode
vas noted in the early days on the /
'uffalo and Monarch Mines which I
re each credited with the production
t several million dollars, was prin-
ipally in high grade silver minerals, |
ruby silver of both the
ght and dark variety, and this char
cter of ore is still manifested in the
eeper development on the lode
More Gold Than Silver.
The east end of the lode on the
ettit ground of the Boise Rochester
roperty was always noted for having |,
higher proportion of gold than sill
er In its values. The richest values
in the early day operations
ere largely obtained within 300 feet
the surface and doubtless due to s
condary surface enrichment or the |
lver values. The primary ore of the I
de, however, as shown in the COO I
OF level on the Monarch mine, which I
1000 feet below the high outcrop of &
e lode and nearly under it, shows a
tier proportion of gold than the
levels and average ore =
elding $40 per ton from this deeper =
rizon from a width to Is feet will
ntain q ratio of about 20 per cent
Id and 80 per cent silver in the to- A
values, while on the extreme east
development at the Boise Roches-
opening, the proportion of gold to
yer is 80 to TO-
to the exhaustion of the
1anza shipping values of the early
Us, numerous attempts have been
de to treat the primary values in b
lode without much success, ex-
ctions of about 40 to so per cent
ng about the maximum result OBJ
led until recently. The refractory FL
racter of the mineral is due, to the CT
that only 20 to so per cent of its ~, ~,
tained values are available to free W,
-e amalgamation, the latter pro- Bl
ton in the Boise Rochester ar
lnd. ar
tn,
he balance of the values are locked q,
in a total contents of about 2 per So
of the ore volume in the form of I'm
allie sulphide embracing sulphide tar
intimony, arsenic, lead, zinc, iron. co,
per and a variet yof silver miner Pa
all occurring in a finely divided nv. Nv
that is decidedly difficult to sep rs
e from the shattered quartz and ty-
gangue by ordinary conccntra- the
process. san
r Falk, the manager of the Boise Av,
hester property, has employed Il. this
'rown. a noted cyanide expert. in ali
i'neii'al tests py por