Idaho County free press. [volume] (Grangeville, Idaho Territory) 1886-current, 1918-03-28
COUNTY AT HEAD IN PRO.
DUc1IoN OF GOLD.
(Contin6ed from page u

\Oontlhued from page II
the country is on the Dewey claim
which is driven near the bottom of
tributary creek that enters the river n
this point. In the portal of this tunne
a vein ten feet wide is richly mineraliz
ed with kidneys and bands of massiv,
chalcOpyrite and bornite ore, and i
said to give an average value of tel
percent copper across ten feet.
Evergreen to Back Development.
The adjoining Evergreen claim is the
most extensively fdeveloped of tn,
group, through the medium of adit TIM
nels and cross cuts in the thin. hiehIy
oxided schist formation, which is To-
cally traversed by vertical diabase dikes
on each border of these bikes for
widths varying from five to twenty
feet. The gold and copper values are
most richly manifested. A dump of
5000 tons of schisty gangue at the por.
al of the main tunnel on this propertv
is said to average $4 a ton in gold, and
underground it shows several zones of
copper carbonte and black coxide seere-
cations as much as thirty feet wide
that are said to average from one to
six percent copper. No attempt at
deep development has been made on
these properties so far. The principal
outcrops are only 200 feet above the
channel of the Clearwater river, and
present very attractive chance for
ehurn drill prospecting.
500 Ton in Gold.
The total shipments from the Ever
green and Dewey properties in crude
ore are reputed to have aggregated
$l5O,0OO, including several carloads
that averaged 800 ton in gold The
district is very favorably situated from
a climate standpoint, with very little
snow in the winter time, as the eleva-
ton is only 1900 feet above sea level
This property could be readily made
accessible to railway transportation by
the extension of the Clearwater branch
of the Northern Pacific from Sites. a
distance of about fourteen miles, The
edge of the Idaho granite batholith is
exposed about a mile east of this prop
erty and in the intervening space a
broad zone of marbelized limestone oc-
;urs, the contact margins of which are
said to carry some rich manifestations
If silver-lead ore. The general geology
If these properties is decidedly favor
able and closely comparable to the
copper sulphide ore Occurance in the
Snake river canyon, particularly at
sixty miles southwest, and
he stike of the zone is in that direc-
ion with several intervening occur
noes of similar ore.
The formation to the west of these
deposits, covering the Camas Prairie
Plateau, are Columbia lava flows, but
ollowing down the Clearwater canyon
eruptive formations are in
violence most of the way for fifty
niles, and contain a series of interest
ne copper and goldrbearing quartz fill
d assure veins.
Interesting prospect of increased gold
utput is that of the ORC Grande Min
ng company near Elk City, in Idaho
ounty. whose new all-slime cyanide
ill Of 300 tons daily capacity was
ompleted late November This
liant has beenS built as pilot mill,
18th view to its extension to 5000
ons a day capacity "a successful and
rofitable recovery of the low grade
alues of the deposit it is designed to
.eat can be made.
Can Use Steam Shovel Methods
This deposit is a big shear zone in
ranite from 800 to 500 feet wide. The
,rmation is friable and adapted to {
cam shovel or glory mole melhOus VI
lining, by steam shovel methods, in an c
zen pit, and it is believed rough Sc {
ctive mining can be done, and that c
alues in 1O0-foot widths of SO ton in !
lid can be maintained in this method
nj the. ore put III a mill at very low
COST as The floor of the
DRY hole adjoins the back OF the mill
II. 6
The success of this enterprise is de- .
,utly to be wished, as it would very !,
sely prove a pioneer in the future n
tension of similar effort, as the Elk n
ty district contains several other .
de zones of low grade gold-bearine q
+rocaable for thousands of feet, .