Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-08-14
EUREKA, NEVADA, SATURDAY. AUGUST Ia. 1897

quivocally declared that the ore Is 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 bad
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 200 feet or thereabout, and
that there is no geological reason why ore
should not be found in ss valuable guam
titles as il was found above, il the work
we're done. He thought that gold.beariDg 6
arsenical pyrites and silver-bearing
gslens would be found in more compact
form, and hence richer than the oxidized
ores, which were more or less mixed with
limestone, that the lode had yielded above
II is 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 l400 feet.
~ PROSPECT MOUNTAIN
Rises 10 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
Noun tain, has an elevation Of 1904 feet,
and the higbes. point on Ruby Hill reaches
an altitude Of only 1921 feet above sea
level. II Is here seen that the difference
in the elevation OF the two points Is 2,3lS
feet.
The outcroppings Of the ore bodies Of
Ruby Hill were larger than those Of Pros
peot Mountain, but the difference may be
accounted for In the excessive erosion Of
Ruby Hill. In the main body OF Prospect
Noun tain 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 10 lines, about / 900 feet below the top Of
the 10 ain ore chute and little over 600 feet
below the main tunnel level. The surface
of Ruby Hill is relatively fiat when CON-
pared with that OF Prospect Mountain,
which il doubtless due 10 the greater ero-
sion OF the former, and il is therefore fair
10 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 up by infltra-
lion and dynamic pressure from below-is
correct. that relating to the difference in
size OF the outcroppings of Ruby Hill and
Prospec. Mountain Is not without reas-
enable basis.
nf
Ruby Hill and Prospect Mountain has re.
Gently been discussed here, and there has
been no reason sdduced to show why the
work should not be remunerative. IL has
been demonstrated that the ore bodies still
continue going down in the caves. below
the deepest workings OF the Diamond and
Excelsior mines. 1t is 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 mires
as valuable as those which we're excAvsted
above. 1t 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
ite, and that the difference in the extent OF
the respective outcroppings upon Ruby
Hill and Prospect Mountain 10 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 bot little question as 10 the import
ant bearing OF the fault on the presentstruc-
,ure OF Ruby Hill and Prospect Mountain
and the relation OF the ore bodies to each
other. The former has besn manifested
through diligent investigation instigated
under nAtionsl authority, and IL is quite
probable that the ascending ore bearing
solutions passed up through the great fis-
sure and, by means OF infiltration 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 were created by the pre-
viously occurring subterraneous disturb.
ances.
The elevation OF the main tunnel level
a. the Diamond mine is 1900 feet above
sea level, while that of the highest point on
Ruby Hill is only 1900 feet or thereabout.
and the elevation OF the Ruby Hill CROP
pings is hardly more than 100 feet above
that OF the deepest workings of the Dis-
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 Eureks
Con. at the relative points OF elevation,
and their present condition Is an augury
that they will become as famous and equal
ly az productive and lucrative as were the
Eureka Con. aud Richmond mines In theii
palniest days. but deep level mining IL
needed IS much in the one as in the others
~The distinguishing names OF the forms
.ions OF Eureka District are local and were
fret adopted by Mr.. Arnold Hague. the
eeoIogist in the field OF this division OF thu
U. s. g. 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