Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-07-17

quivocslly declared that the ore 70 there
and more than that, they believe that Il
goes down deeper and in paying guam
titles.
Mr.. Clarence King, the eminent geolo-
gist OF national fame, who formerly had
charge Of the Richmond mine, and is quit.
familiar with the physical condition o.
Ruby Hill and the manner Of the deposi-
ton OF the ore bodies, has expressed the
opinion in the most indubitable manner
that exploration should be carried TO fur.
ther depth OF 1000 feet or theresbout, and
that there is no geological reason why ore
should not be found in a. valuable guam
titles ss il was found above, IL the worl
we're done. He thought that gold bearing
srsenical pyrites and silver-besrine
gslena would be found in more compact
form, and hence risher than the oxidized
ores, which were more or less mixed with
limestone, that the lode had yielded above
II is calculated that the subterrsnean
disturbance which created the Ruby Hill
fault raised the footwall side Of the Pros
pect Mountain limestone, through the Eu-
reka Con. mine, about 1400 feet.
PROSPECT MOUNTAIN
Rises to an elevation considerably higher
than that OF Ruby Hill. showing that the
erosion OF the latter locality must have
greatly exceeded that OF the former. Pros
pect Peak. the highest point on Prospect
Mountain, has an elevation Of 1904 feet,
and the highest point on Ruby Hill reaches
an altitude Of only 1921 feet above sea
level. IL Is here seen that the difference
In the elevation Of the two points is 2,313
feet.
The outcroppings of the ore bodies Of
Ruby Hill were larger than those OF Pros
pect Mountain, but the difference may be
accounted for in the excessive erosion Of
Ruby Hill. In the main body Of Prospect
Mountain the ore bodies generally augment
in size with the increase Of depth. The
deepest workings In Prospect Mountain,
following the ore downward from the sur
face, are found In the Diamond and Excel
sior mines, about 1 900 feet below the top OF
the main ore chute and little over 500 feet
below the main tunnel level. The surface
uf Ruby Hill is relatively fiat when COM
pared with that OF Prospect Mountain,
which is doubtless due TO the greater ero-
sion OF the former. and il is therefore fair
TO believe that the outcroppings OF the
RubY Hill ore bodies were, at one time,
no greater than those Of the Diamond and
Excelsior mines at the present; and II the
theory generally accepted here-thst the
ore solutions were forced mp by indltra-
tion and dynamic pressure from below-is
correct. that relating to the difference in
size OF the outcroppings Of Ruby Hill and
Prospect Mountain Is not without reas-
on able basis.
The question OF deeper exploration in
Ruby Hill and Prospect Mountain has re-
Gently been discussed here, and there has
been no reason sdduced 70 show why the
work should not be remunerstive. II has
been demonstrated that the ore bodies still
continue going down In the caves. below
the deepest workings Of the Diamond and
Excelsior mines. II is also shown that the
ore continues dipping below the deepest
excavation in the Eureka Con. mine and
there 10 reasonable probability that ore
bodies may be found below the deepest
workings OF either Of the Ruby Hill mines
as valuable as those which we're exeAvated
above II Is manifest that the limestone
bodies OF Ruby Hill and Prospect Noun
tain. at present separated by the granite
and Prospect Mountain quartzite. were
originally one and the same that the dis.
connection occurred through excessive ero-
sion above the Prospect Mountain quartz
lite. and that the difference in the extent OF
the respective outcroppings upon Ruby
Hill aud Prospect Mountain Is due to the
erosion. Undoubtedly the erosion occur
red subsequent to the uphesval and rela-
tive creation OF the Ruby Hill fault. There
can be bat little question as 10 the import
ant bearing OF thefault on the presentstruo-
ture OF Ruby Hill and Prospect Mountain
a. H. - NJ a. ah
other. The former has besn manifested
through diligent investigation instigated
under national authority, and ID is quite
probable that the ascending ore bearing
solutions passed up through the great fs-
sure and, by means OF infltration and per.
collation. through the seams In the country
rock. we're conveyed to and deposited In
the chambers and other cavities In the
limerick which we're created by the pre-
viously occurring subterraneous disturb
ances.
The elevation OF the main tunnel level
st the Diam ond mine is 1900 feet above
sea level. while that OF the highest point on
Ruby Hill is only 1900 feet or theresbout,
and the elevation of the Ruby Hill crop
pings ia hardly more than 100 feet above
that OF the deepest workings OF the Dia-
mond and Excelsior mines. In the latter
the ore produced is relatively improving
in quantity and quality with greater depth,
and the yield OF gold in proportion to the
silver Ia increasing. The Diamond and
Excelsior mines are making better show
ing than did the Richmond or Eureka
Con. at the relative points OF elevation.
and their present condition is an augury
that they will become ss famous and equal
ly as productive and lucrative as were the
Eureka Con. and Richmond mines In their
palmiest days. but deep level mining is
needed as much In the one as in the others.
*The distinguishing names OF the forma.
tions OF Eureka District are local and we're
frat adopted by Mr.. Arnold Hague. the
Qeologist in the field OF this division OF the
U, 8. @. Survey OF the Fortieth Parallel.
Two Armies-she Regular and Ir-
regular!
To which would you prefer to belong :?
The regular. undoubtedly. The irregu'
lars are, admittedly. the most numerous,
but they are in very undesirable state
of no discipline. Hostetter's Stomach
Bitters will soon remedy this want in a