Yerington times. [volume] (Yerington, Nev.) 1907-1932, 1911-10-21
REPORT OF ENGINEER
ON IRON MASK GROUP

1t will be remembered that sometime
Nevada Idaho Nj. Co. S Iron Mask group
of copper claims, and Richard s. Nc
Caffery, T. NJ, of Moscow, Idaho, paid
this district visit for the purpose of ex-
amining the property, which lies to the
east of Yerington few miles. Follow
ing are the reports made to the company
by these gentlemen:
Moscow, Idaho, July Is. 1911
The Nevada-Idaho Mining Co., Moscow
Idaho.
Gentlemen: On July E, and s, l
| made all examination of the mining
claims of your company at Yerington,
Nevada, and l report as follows:
The town of Yerington, Nevada, is in
Lyon county, and is on the Nevada Cop
per Belt railroad standard guage rail
way operating between Mason City and
Wabuska, the latter station on the
Southern Pacific railway on the Hazen-
Goldfeld line. Your claims are located
to the east of Yerington, about eight
miles and at all elevation of approx
mately 5000 feet. The claims are seven
in number and are named the Easter
Easter No |, Rustler, Iron Mask, Iron
Mask No 3. The claims are held OH
assessment work, which work has been
completed for the year 1910
The country rock in the region about
the claims is granodiorite and tt is is cut
in numerous places by dikes On the
claims there is dixie of granodioritic
structure striking n. SIS degrees east
across the claims and along the contact
of this dixie and the country rock the
prospecting work has been done by sur
face trenching and pits. This work
shows on the contact, a quartz selvage
which in many cases carries the mineral
hematite an oxide of iron and i'll many
cases is copper stained. In places in
the quartz are seams of chalcopyrte, the
sulphide of copper and iron and this i'll
still other places altered to copper sill
cate, chy yrocolla and the blue and green
carbonates, azurite and malachite.
In the accompanying sketch, the
the line of contact of the dixie through
the country praHodiorite.
On the Easter claim, the long trench
is the most promising exposure on the
1 hare la caiv iS
about 80 inches wide and contains seams
of chalcopyrite, assaying copper So per
cent, gold .0S ozs. per ton and silver s
ozs. per ton. l would recommend that
at this point shaft be sunk following
the lead all the time to determine the
development i'll the depth at this point.
The country is very dry and shaft
could probably be sunk several hundred
without enconntering water, so that the
expense of this work would be at min
mum.
On the Rustler claim is a trench ex-
posing the contact, which, at this point,
carries considerable iron with some cop
per silicate carbonate the latter assaying
copper ~ per cent, gold .02 ozs. per
ton and silver 4 ozs. per ton. At this
point, too it would be advisable to sink
shaft following the lead to determine
conditions i'll depth here.
The Easter and Easter No | claims
are located with the length of the claim
running across the vein and new loca-
ton should be made crossing these
claims and taking i'll all their mineral
showing. This new claim with the Rus
tier and the Iron Mask No. ? would
then take i'll all the contact and if the
other locations were allowed to lapse,
these three would then hold all mineral
now indicated by the surface groupings
and trenches.
In mineral deposit of the kind shown
here, the ore forms along the contact of
the dixie and the country rock or i'll par
allel assures. The surface showing at
the places where the sinking of shafts
was recommended, is su Ii that there are
possibilities of developing an ore chute
beneath them. With the new smelter
at Wabuska i'll the market for copper
ores, any ores eXtructed would be i'll de
mand and should be treated at profit
With an expenditure of 81 200, divided
between the two places indicated, the adj
visibility of further work on the prop
erty would be demonstrated.
Yours very truly,
RICHARD S. McCAFFREY, Il. NJ.
Moscow, Idaho, July p, 1911.
Nevada Idaho NJ 'ng Co., Moscow, Idaho.
Gentlemen: Supplementing my re-
port of the 18th inst. on your property
at Yerington, Nevada: The dixie cross
ing your claims has a width of several
hundred feet. The fissure zone along
its contact with the cauntry rock and in
which ore chutes would form, is 40 to 50