Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-07-31

quivocslly declared that the ore % there,
and more than that, they believe that II
goes down deeper and In paying qusn'
Titles.
Mr.. Clarence King, the eminent geolo-
gist OF national fame, who formerly had
charge Of the Richmond mine, and is quite
familiar with the physical condition OF
Ruby Hill and the manner OF the deposi-
tion OF the ore bodies, has expressed the
opinion in the most indubitable manner.
that exploration should be carried to fur
ther depth OF 900 feet or theresbout, and
that there Is no geological reason why ore
should not be found In 90 valuable guam
titles 90 il was found above, IL the work
were done. He thought that gold bearing
srsenical pyrites and silver.besring 9
gslena would be found in more compact
form, and hence FISHER than the oxidized
ores, which we're more or less mixed with
limestone, that the lode had yielded above.
10 10 calculated that the subterranean
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
Bises 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 Hillreaches
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
10 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 / 800 feet below the top OF
the main ore chute and little over 500 feet
below the main tunnel level. The surface
of Ruby Hill is relatively fat 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 il the
theory generally accepted here-thst the
ore solutions were forced up by indltrs-
.ion and dynamic pressure from below-is
correct. that relating TO the difference in
size OF the outcroppiDgs Of Ruby Hill and
Prospect Mountain is not without reas.
enable 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 remunerative. It has
been demonstrated that the ore bodies still
continue going down in the caves, below
the deepest workings OF the Diamond and
Exoelsior mines. IL ia also shown that the
ore continues dipping below the deepest
excavation in the Eureka Con. mine and
there is reasonable probability that ore
bodies may be found below the deepest
workings OF either of the Ruby Hill mines
as valuable ss those which we're excavated
above. 1t 10 manifest that the limestone
bodies OF Ruby Hill and Prospect Noun.
tain, at present separated by the granite |
and Prospect Mountain qusrtzite, we're
originally one and the same that the dis |
connection occurred through excessive ero.
sion above the Prospect Mountain quartz
The respective outcroppings upon Ruby |
Hill aud Prospect Mountain is due to the
erosion. Undoubtedly the erosion occur
red subsequent to the upheaval and rela. |
tive creation OF the Ruby Hill fault. There
can be bat little question as 70 the import.
ant bearing OF the fault on the present tstruo-
ture OF Ruby Hill and Prospect Mountain
and the relation OF the ore bodies to each |
other. The former has besn manifested
through diligent investigation instigstsd
under national authority, and 1t 10 quite
probable that the ascending ore bearing
solutions passed up through the great fis-
sure and, by means OF infiltrstion and per.
collation. through the seams In the country |
rock. were 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
ct the Diamond mine is 1900 feet above
sea level, while that OF the highest point on
Ruby Hill is only 1900 feet or thsresbout,
aud the elevation Of the Ruby Hill crop. |
pings 10 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 10 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 as famous and equal
" as productive and lucrative as were the
Eureka Con. and Richmond mines 10 their |
palmiest days. but deep level mining is
needed as much 10 the one as in theothers.
*The distinguishing names OF the forma-
tions OF Eureka District are local and we're
frst adopted by Mr.. Arnold Hague, the
eeologist In the field OF this division OF the
U. S. G. Survey Of the Fortieth Parallel.
Two Armies-the Regular and Ir-
regular!
To which would you prefer to belong ?
Tba regular. undoubtedly, The irregu. |