The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1913-10-23
INTERSTATE CALLAHAN.
Interesting Descriptive Detail Of TN
deraround Workings.

The Interstate Callahan mine is
opened through a crosscut adit $500
feet long with its portal just above
the bottom OF Nine Mile canyon. IN
fortunately, from a prospecting stand-
point of the Intervening formation,
this adit is driven nearly all the way
on big soft north and south fault
zone. 1t cuts the Interstate vein ~
a vertical depth of 1900 feet and the
vein itself stands nearly vertical.
The ore body at this level has been
drifted upon and stopped continuously
from one to four floors high in widths
varying from 8 to 20 feet and Is said
to carry an average of rs per cent Of
clean mineral and certainly looks the
part while the west face which Is still
being driven is still showing 10 feet
of rich ore and the full lineal extent
of the ore channels is yet to be deter
mined.
Interstate and Callahan Connection.
This stope is connected through a
vertical raise 400 feet high to the
lower Callahan tunnel driven into the
mountain from Carbon creek slope.
From the top of this raise. crosscut
south 100 feet has opened the Inter-
state ore channel where 1t Is now pc
ing drifted on preparatory TO s'oplns
and is showing the same high grade
mineral as the main stope below, with
bodies up to feet thick OF clean zlnc-
lead sulphide, while the apex OF this
vein on the original Callahan group Is
exposed true to strike and dip IN a
succession of open cuts for several
hundred feet down the mountain slope
TO the north, where the surface deprls
is thin, and there seems no reason 60
doubt this remarkably strong mineral
channel will carry productive stope
from it's present 1200-foot level prac-
ticaIjv through to the surface and Ill
timately produce several nunureu
thousand tons of valuable ore me
enclosing formation of this ore eouy
on the 1900 and S00-foot levers q,
which it Is being opened IS typlea,,
phase of the black carbonaceous i,ruo l
slate of the Prichard formation. The
ore occurs in clean bands and masses,
VARYING from / foot to 7 or Ieet
thick and consists Of high grade
zinc sulphide mineral containing a
little lead. the lead values materially
Increasing towards the west emo ol
the shoot and at that end show an es-
timated relative proportion of ABOUT
Load TO 4 zinc, The clean ore podles
are associated with concehtra,lns
mineral. but the cleaner bodies liaN'
developed a peculiar action anu NAN. :.
off into the hanging wall country ~
steep wedge shaped spurs that c',''
IN point from to 10 feet OUT OF ~.
vonaral vein course and are probably
infl,,enced by system of incipleh,
\ cross flssuring The ore seems 10 ps
n replacement Of the general lorma
t,or which constitutes the pflnclpa
sangue together with incidental panns
sc ,,a;n n1artz The enclosing walls
,,ave decided bedded structure ina
rtr,Las north and south and dips ess
- fairly steep angle The VEN II
sa,f is apparently pronounced snoe'
zone which gives 1t banoeo appsa,
ance standing nearly ver,lca' i'll
striking east and west Win d SIZE"
dip to the north.
A Prospoctor's Tribute
The Callahan vein Is roughly pa
alle to the Interstate vein. put SIM
convergence towards 1t WIN piun a..
able junction at point a sIol! &c
'tanee east of the Nine Mile adit lii.el
section This vein, like the Inter
state. is also very pronounce1 ns
sure course and is relatively Hiucl Hiu,
richer in lead than the Interstate ven
as Is demonstrated by its shipping re
cord during the course Of its develop
ment by its original owners, aggregat
ing AZ cars or crude hand-picked MN
eral that gave lead values OF ~ pc
INT and SIS Of an ounce Of sliHer Pc
rnit per ton. This vein IKE us neisn
bor. Is In the main Prichard ,oln'a
Il ton. II has been developed tnrous
adit tunnels and connecting raises
4 depth Of 500 feet below It's hlgnes
anex This work is several thousan
feet IN extent and was all drive
s,.,,, tho Carbon creek slope OF TN