Eureka weekly sentinel. [volume] (Eureka, Nev.) 1887-1902, 1897-07-03

goes down deeper and in paying qusn
Titles.
Mr.. Clarence King. tho eminent geolo-
gist of national fame. who formerly had
charge OF the Richmond mine. and is quite
familiar with the physical condition o.
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 as valuable guam
/ titles as il was found above, il the worl
we're done. He thought that gold bearing
arsenical pyrltes and silver bearing
galena would be found in more compact
form, and hence risher than the oxidized
ores, which were more or less mixed witt
limestone, that the lode had yielded above
IL is calculated that the subterranear
disturbance which created the Ruby Hill
fault raised the footwall side OF the Pros
pect Mountain limestone. through the Eu
reka Con. mine, about 400 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. II is here seen that the difference
| in the elevation Of the two points is 2,3lS
feet.
The outeroppings of tho ore bodies OF
Ruby Hill we're larger than those Of Pros.
pect Mountain, but the difference may be
I'D To- sls.n fua arn m
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 ! 800 feet below the top OF
the main ore chute aud little over 500 feet
below the main tunnel level. The surface
II Ruby Hill is relatively fiat when COM
pared with that of Prospect Mountain,
which il doubtless due to the greater ero-
zion OF the former, and ID 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 up by in6ltra.
correct. that relating to the difference in
rize OF the outcroppings of Ruby Hill and
Prospec. Mountain is not without q ress
enable basis.
The question OF deeper exploration in
Ruby Hill and Prospect Mountain has re.
Gently bten discussed here, and there has
been no reason adduced to show why the
work should not be remnnerstive. 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. 1t is also shown tha. 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
az valuable as those which we're excavated
above. 1t is manifest that the limestone
bodies OF Ruby Hill and Prospect Noun
tain, at presen. separated by the granite
and Prospect Mountain qusrtzite, were
originally one and the same; that the die
connection occurred through excessive ero-
sion above the Prospect Mountain quartz
ite, and that the difference in the extent OF
the respective outeroppings upon Ruby
Hill and 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 lit.le question as 20 the import
ant bearing OF thefAult on the presentstruc-
.ure OF Ruby Hill and Prospect Mountain
and the relation OF the ore bodies 10 each
other. The former has been manifested
through diligent investigation instigsted
under national authority, and IL 10 quite
probable that the ascending ore bearing
solution passed up through the great fis-
sure aud. by means OF inf1ltrstion and per-
collation. through the seams In the country
rock. were conveyed TO and deposited in
the chant bers and other cavities in the
limerick which were created by the pre-.
viously occurring subterraneous disturb
snces.
The elevation OF the main tunnel level
at the Diamond mine is 1900 feet above
sea level. while that OF the highest point on
Ruby Hill Ia 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 ia relatively improving
in quantity and quslity with greater depth,
and the yield OF gold in proportion to the
silver IL 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 ia an augury
that they will become as famous and equal
Iy as productive and lucrative az we're the
Eureka Con. aud Richmond mines In their
palnniest days. but deep level mining is
needed as much in the one as in the others.
*The distinguishing names OF the forma-
tiops OF Eureka District are local and we're
frat adopted by Mr.. Arnold Hague. the
eeolo ogist in the field Of this division Of the
U. S. G. Survey OF the Fortieth Parallel.
Tossed ON the fOaming Bt1iOws
You may never hsve been. but II you cross
the Atlantic, no matter how smooth the
49,. nxnanaa xriAhnnt aaa aicL nasa Ynn