Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-11-27

u lIA811
ward. 1t faults all formations, but is IT.
seIf nowhere fsuited or dislocsied 80 far ss
can be determined. Ii has been traced
upon the surface and is identified under
ground By its filings Of rhyolite, ore,
ledge material and composite OF rnyohte
and clay, the latter having been produced
BY attrition where the walls are close to-
gether or nearly 30. Il has q most import
ant bearing on the present structure OF
Ruby Hill and the country 20 the south
ward, AZ slso or the relation OF the
ore bodies to each other. Throughout iis
entire course il is found TO be the key TO
| the structural problem OF the Ruby Hill
and Prospects Mountain minerslized zones.
| Tbs country southwest, on the tootvsll
side OF the fault, has been raised several
hundred feet relatively 10 ,he hanging
wall. /. is probable that there was up
hesval and subsistence. but that the latter
exceeded the former. Taken in connection
with all Of the mines TO the southeast, itis
found 20 be q fault plane along which the
whole southwestern country has been
raised from 500 TO 1000 feet. There can
be no question that the key 10 the problem
Of deep mining IN Ruby Hill and Pros
pee, Mountain will eventually be found IN
the Ruby Hill fault.
| line limestone Dl nuD1 nm oA'hN
into two sections, which We will designate
the "front' end back" limestone. The
latter forms q wedge which, taken through
,be Eureka Con. mine, extends from the
surface downward to near the 18th level
end lies between the quartzite, the face OF
which has g mean dip Of about 40 degrees,
and The fault assure, which dips at an sn-
gle OF about 20 degrees. This, which we
shall call the upper wedge, lies on the
southwest or footwsll eide OF the fissure
and has been raised in this locality about
l,4O0 feet relatively above the lower wedge
and nsrrows 70 8 thin edge 81 Its "
! axtremity. Is IL remarkable for its crushed
and broken condition. It was in this
wedge that all OF the tremendous ore bod
ies which made Ruby Hill famous in the
early DAYS Of the district were mined
The exuiorstion Of the front limestone,
which o~yerliss the fault 90 the southwest,
hiss not been sufficient 10 determine
| WHISTLER either large deposits or Any ore ct
slI NAV be found in il. From the narrow
part OF the upper wedge. downward, as
seen upon the 18th and l4th levels, as well
"a upon she f,200-foot crossut from the
LOGAN shaft, below the 14th level OF the
| Eureka Con. mine. the face OF the quartz
| i,e forms tins footwsll Of the fault, the lat
ter maintaining its dip at an angle OF 10
| degrees, the same % Ii does above. Below
the 18th level, with it's thinest edge upper
| most. and it's form inverted, - compared
with the upper wedge. but situsted upon
| the northess. or hanging wall side OF the
fault is
WEDGE OF LIMESTONE
| Identical In character with the upper
wedge. This is crushed and shattered IN
| precisely the some manner, and. subse
| ouent TO the upheaval and subsistence
along the fault line, was doubtless an un
| divided part OF the block Of limestone
which forms the upper wedge.
The future OF Eureka District will de
pend largely on deep level mining; not
| the. the levels near the surface are ex-
hausted Of ore, for on the contrary, there
are hundreds Of the smsller mines and
| prospects OF the district capable OF pro
| ducing the precious metals that are seldom
or never talked about; but there IL no
question Of doubt among the experienced
miners who have worked or the deepest
levels Of Ruby Hill that there are bodies
| OF ore to be found in the lower wedge OF
limestone as valuable as those which
we're excavsted in the big chambers OF the
upper wedge.
The exploration OF the lower wedge would
| require the expenditure Of large sums OF
money. no doubt-perhaps hundreds OF
thousands, possibly millions OF dollars;
bat when il is remem bered that the Eu-
| reka Con. and Richmond mines have alone
paid over ten million dollars 10 dividends
and made q number OF people wealthy,
and when ID lie further borne in mind that
the ore Ia known to enter tho lower wedge
OF limestone and 10 60 down below any
depth yet attained In Ruby Hill. II 10 not
unreasonable TO believe THAI deeper ex-
plorstion In the lower wedge would pay.
The only reason given 10 the public by
the Eureka Consolidated management for
| not sinking the LOGAN shaft deeper and
csosscutting 10 the lode below the LOGAN
1900 foot level. was that the machinery
| upon the LOGAN shaft Was inadequate for
the dual requirements OF draining the mine
OF water and raising the material broken
underground to the surface; they were IN
willing to continue draining the hill Of
water unless one or more OF the companies
that were operating In Ruby Hill would
divide the burden Of expense with them.
II 10 q settled fact that the machinery was
defective for the general requirements Of
the mine. but the volume Of water to be
commended with and all OF the material that
Sp1lu unFC Oiohc1 III tno mAhC OOuAo
have been raised to tbs surface with ma
ohinery that should not have cost over
one-ffth OF the sums that we're paid for
the cumbersome plant which now stands
idle ct the LOGAN shaft. II is probable
that
THE TRUE WATER LEVEL
OF the Ruby Hill lode. II there IL such q
thing, has not yet been encountered. This
is a moot question. The principal flow Of
water that was encountered IN the 1900.
foot crosscut from the LOGAN shaft came
from the qusrtzite. which was uselessly
penetrated. but II proper measures were
taken, that flow could be easily stopped
The balance Of the water came from the
shale in the main hanging wall Of the lode,
as we'll as from seepage from the surface,
but was immsteriai. The limestone itself
is comparatively dry. which fact has been
amply proved upon the lowest workings Of
the Richmond mine, which are deeper than
the bottom of the LOGAN shaft. Before
the quartzite was broken into in the LOGAN
l200-foot crosscut. when the water came