Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-10-02

aid Hamburg mines further to the south
wrd. Il faults sli formations, but Is IT.
ssf nowhere faulted or dislocsted so lar as
cm be determined. II has been traced
mon the surface and is identified under
sound By its filings OF rhyolite, ore,
ledge material and composite OF rnyolise
AID clay, the latter having been produced
b. attrition where the walls are close TO
either or nearly so. II has q most import
art bearing on the present structure OF
Rby Hill and the country 10 the south
ward. as also on the relation Of the
ere bodies 10 zach other. Throughout It's
ntire course il is found TO be the key to
ne structural problem Of the Ruby Hill
md Prospect Mountain minerslized zones.
The country southwest, on the footwail
tide OF the fault. has been raised several
hundred feet relatively 70 the hanging
wall. II lie probable that there was up
heayal and subsidence, but that the latter
exceeded the former. Taken in connection
with all OF the mines to the southeast, 1t Is
found TO be o fault plane along which the
whole southwestern country has been
raised from 500 10 1000 feet. There can
be no question that the key TO the problem
of deep mining In Ruby Hill and Pros
pect Mountain will eventually be found in
the Ruby Hill fault. -,
The limestone OF Ruby Hill is divided
into two sections, which We will designate
the .sfront' and "bsck" limestone. The
latter forms q wedge which. taken through
the Eureka Con. mine, extends from the
surface downward to near the 18th level
end lies between the qusrtZite, the face OF
which has q mean dip Of about 40 degrees,
and the fault fssure. which dips at an an
gle OF about 10 degrees. This, which we
shall call the upper wedge, lies on the
southwest or footwsll side OF the assure
and has been raised in this locality about
I,4O0 feet relatively above the lower wedge
and nsrrows 70 a thin edge al its lower
extremity. 1t is remarkable for its crushed
and broken condition. II was in this
wedge that sll OF the tremendous ore d
les which made Ruby Hill famous in the
early days OF the district were mined.
The exploration Of the front limestone,
which o~verlies the fault TO the southwest,
has not been sufficient to determine
whether either large deposits or any ore at
all may be found in il. From the narrow
part OF the upper wedge, downward, as
seen upon the 18th and 14th levels, % we'll
az upon the ~1,200-foot crossut from the
LOGAN shaft, below the 18th level OF the
Eureka Con. mine. the face OF the quartz
lite forms the tootwali oil the iaui1, the ia ~
ter maintaining Its dip at an angle OF ~
degrees, the same as ii does above. Below
the 18th level, with it's thiuest edge upper
most and it's form inverted, as compared
with the uppe wedge. but situated upon
the northeast or hanging wall side OF the
fault is a
LOWER Oh LIMESTONE
Identical in character with the upper
wsdoa This Il crnsbed and shattered in
nrecisalv tba some manner. and. subse.
prant 20 tha nnheaval and subsidence
.fona ,ba fsnIt line. Was donbtless an nm.
5;v;dsd mart ~ the block OF Limestone
vbich forms the MINER wedge.
Tha fntrra ~ Fnraks District will ia.
,oad ,sroelv IN dsen level mining: no,
h.. The iayals near the suriace are ex.
h.nste5 ~ ore Cor nm the contrary. there
-" hn,dreds ~ ,ba smallar mines snd
n-rosnec,s 80 ,ba district osnable OF pro.
sro;po 10 nrsc;ors Metals tbst are saldom
~ nase- ,sissd shont. bnt there r. nc
naa.;om 80 donh. smong The ay-nar;enced
49, who hava worLed an he deanss,
ianaIs ~ P,hv hi, ,bst .ba,a are bodiss
- ora 20 ba to,nd IN ,bs Iower vedga M
Mmasone .sIrahla 90 tbosa wb;cb
ra.a e1osva,aa a. .ha h;o chamhars ~ the
80 ,Sasaa
uRTrSa arno..,;on o,tha iowar waaoa vonla
- .bna~nsn5;trr "a isroa anna "a
80 ~ auht"na,b bnndrads M
.honssds no.s;hIv miIi;pns Of dollars.
hr. whan - harad tb.t the En-,
80 c. 80 piohmonS ninas Nv slone
nsiS ovar ,sn million dollars in dividends
- msda nnmhar ~ naonIa wsaItbv
- uhan; 4. Il tnr,he, horna IN mind tbst
The ore ia known TO enter the lower wedge
OF limestone and to 90 down below any
depth vet attained In Ruby Hill, II is not
unreasonable to believe that deeper e.
ploration 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
c-rosscuttin0 10 the lode below the LOGAN
12OO.foot level, was that the machinery
upon the LOGAN shaft was inadequate for
the DIAL requirements OF draining the mine
OF water and raising the material broken
underground to the surface; they were un-
willing 10 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.
It IL q settled fact that the machinery was
defective for the general requirements OF
the mine, but the volume Of water to be
contended with and all OF the material that
nocla h.va ha.z hrokor ;c Sha r,ina nonII