White Pine news weekly mining review. [volume] (East Ely, Nev.) 1910-1920, 1910-09-25
ELY CENTRAL.

ELY CENTRAL.
Three churn drills are now at
work on the Eureka end of Ely Cen
trail the two new Star drills which
arrived last week having been spot
ed in a line to the south and a little
to the east of the Eureka shaft. The
drill holes are calculated to tap the
porphyry ore of the steam shovel pit
which is pitching to the east and the
south into Ely Central ground.
The work in this part of Ely Gen.
trails estate Is particularly interest
ing at this time for the reason of the
developments which have been made
there and also of those in the pit.
The south crosscut at the upper or
455-foot level has served its purpose
In opening up the porphyry above the
Copper Flat fault plane. and further
work is unnecessary. save to sink a
WINE into and through the fault In
the hope of finding an enrichment
along the fault plane.
The wisdom of such a proceeding
can be better understood. when 1t is
remembered that this Is part of the
famous Herzig theory. When the
fault was encountered in the shaft
carbonate ore which ran as high as
15h per cent in copper was found.
This was an enrichment certainly,
but Mr. Herzig has greater hopes for
the fault plane than this. Down in
the southeastern end of the pit they
are mining native copper, and get
ting the best grade of sulphide ore
that the pit has yet yielded. This
enrichment is along the fault plane,
and is extending toward the Chispy
claim of Ely Central.
AT the same time 1t stands TO rea-
son that the enrichment should be
found to the east, or toward the Eu-
reka workings. The crosscut has
carried the present development 300
feet further to the south than the
location of the shaft, and this means
800 feet nearer to the enrichment
shown in the pit. The drills are
stretched along to the south beyond
the point of the great enrichment in
the pit, and as the big porphyry ore
body shows all the indications of
pitching to the east and the south.
it looks very favorable for the drills
the rich ore on the fault
plane.
A change has come into the cross
cut which is being run out from the
600-foot level, and the material
coming in has all ..-e indications of
being the porphyry ore of the pit.
In the Clipper shaft they are still
in the ore in the north and south
from the west crosseut, and
the latter is being pushed toward the
contact of the limestone and por-
phyry which shows at the surface.
If this contact is made there should
be some rich ore found in addition
to another enrichment at the juno
ton of the ore in the main south
with that of the west crosscut.
The greatest interest is being
taken in the Clipper workings
through the district, for 1t is the gen
eral belief hat Ely Central will de-
yelop one of the biggest mines in the
camp at this point. The west cross
cut was run out at the shallow depth
of 220 feet to ascertain what there
was in the ledge. Fourteen feet of
ore were opened up and they have
drifted for so feet on the body and
still have the very best kind of pre-
At this depth the values are not reg
ular and it was not expected that
commercial ore would be found.
But a number of samples have been
taken which gave very high returns
as high as $12 in gold and silver
and 3.3 per cent in copper.
The greater values have been
and carried by the waters
down below, and that they will be
found at greater depth hardly adj
mits of any doubt. Considerable
water has been encountered in the
shaft, and they are now at about the
permanent water level. In the Alphh
shaft of the Giroux Consolidated ore
body was encountered at the 1000
foot level, and this was close to the
water level. A winze was sunk for
more than 100 feet in the are, and
In the Wine considerable native cop
per was found while in the main ore
body at the top they are getting in
the neighborhood of 20 per CEN cop
per. This ore body, 1t Is claimed is
the same as that of the Clipper, the
reason for its having been en-
countered at so much greater depth
being that the Alpha shaft is several
hundred feet higher than that Of the
Clipper. 1t is in the came forma-
ton, and there seems to be no rea-
son why at greater depth the Clip
per should not develop a big mine.