Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1905-12-16

sneiss and three thousand feet OF the
Eldorado lode. which lies I'm slate and
limestone. The Santa Maria is Itself
a true assure, wide and strong, for 5000
feet through the granite rock Il breaks
away from the quJrtzite whore rs
Vide base or termination forms as a
contact vein, similar TO the copper veins
NJ Butte and elsewhere. The Santa
Maria as copper vein does not show
up as such al the surface; there It
shows only gold silver and some lead
values. True. there are traces OF
copper sulphide and occasional patches
OF oNidized copper give green and blue
markings TO the outcrup OF the vein.
Even when work had progressed some
distance on this great lode only gold
values gave returns 20 the assayer.
AZ times an intrusion Of from 80 TO
100 pounds Of chalc0cite or chalcopy-
rite would appear m he soft frlable
body OF the vein hlt it was not until
about 200 feet had been gained that the
rive nature of this mine began to UNI
fold itself. AZ that distance IN the
tunnel the COPPER began to appear in
every car OF ore removed and the vein
wdened Ear beyond the sides of the
hve-foot tunnel. AZ some places the
vein shows width OF - feet again II
narrows to three or four feet but
strong clear walls continue It's gold
and silver values keen pace with it's
copper values and the near approach
OF the east contact was indicated By
the silyer-lead charged oNidized spar
that still shows iu the face Of the tun-
mel and that runs directly along the
vein. The silver lead ores reported at
the time Of discovery did not occur in
wide shoots. Thoy are simply brcabs
or faults IN the vein but SO narrow that
the silver lead ores contained therein
are but thin bands crossing immense
bodies ~ gold bearing copper ore. on
this lode the present tunnel ~ now
driven coo feet. with ore the entire dis
tauCe II IL mostly a concentrating ore
but there are immense bonanzas.
When the new tunnel now about 70
be placed under way * COMPLETED. il
viii cut the Santa Maria lode 500 feet
deeper than nj present. this lower lev
el attained by few mines of orr Gown
try that IS II the fact Is taken into
consideration that the tunnel so driv-
en- will cut into a point fully 1000 feet
below the oltcrop Of the vein at the
contact This tunnel now about 10 I've
started viii be, when completed. about
1,400 feet in length and might be
termed a cross country tunnel that
will cut az right angles five strong
mineral lodes three of which run par
allel with the Santa Maria lode and the
nth IS that tremendously strong and
bold vein known as the New York
lode which is really a fat vein that
rises at the contact Of the uuartzlte
with the greiss and spreads southwest
ward like an Immense wedge and that
gradually tapers down from 100 feet In
thickness at the contact until at a
point 1900 feet from the above contact
II shows its surface outcrop only about
10 feet In thickness.
To the student Of geology and vein
formation the six lodes Of the Santa
Maria presents an example of marvel
Gus interest. The veins six I'm num-
her represent az many different peri
DDS OF vein formation for there are no
two OF them OF contemporary age no
two OF them similar In their width.
none of them that show metallic val
ues copying after the bowel inclusions
OF its next neighbor and TO two OF
them OF the same dip into the noun
tain.