New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1880-03-03
PECULIAR miES OF COHoR1D0.

| A LECTURE by PROFESSOR NEWBERRY.
49, ADDRESSES THE BULLION CLUE ON SOME or
! IuE EFMARKABLE DI5cov .EI.s AT LEADvILLE.
Professor j. ). Newberry delivered a lee
tuf, last u-Ht to the members OF The Bullion Cub Oh
The more interesting mines OF Colorado" The
/ par.ors OF the club IN Twenty-iourtG-st. were
/ we'll 81 ed principally by gentlemen interested I'm
mining huI the lecturers remarks regard 90 the
mines OF Ieadyille listened TO with much interest
In considering tie various that be found at
ID mining camp. De produced number OF geological
specimens that he had collected IN the vicinity, and
these were handed around for inspection.
The most interesting mincs sad the lecturer those.
I suppose in winch you yourselves may have 9 pc
cun.ary interest aud when say the most Interesting
mines may be Understood refer those that prom
,se the largest returns gold and silver Pcraapo the
two things ao widely epalated and yet do not
quite mean that, hut the mines that are inter
csiiug IN their formation OF veins. and those
that have been puzzles 10 the men who believed
themselves thoroughly familiar with the sub
lcct I shall refer principally 10 the exceptional
mine that havo visited and examined and studied and
which Is known as the "ColoradS Prince" 1t Is un-
known to most OF yOu. doubt vcuured TO predict
some time ago LoIdvile was destined to be as I'm
portant gold camp as a silver camp,
and my words were verified so far that
from eight TO ten million dollars Of gold
were taken Of the California Gulch Now the ques-
tion is how did the gold there Up 10 the present
time IL has been fully traced 70 its source, and
mad, No my mind there discoveries 10 be made
that would surprise people. The development OF the
Colorado Prince IL one OF these surprises, and
venture to say not the last one.
The GOLD here is found between strata Of limestone
and norphyry the limestone being Glow The deposits
arc not IN the same form the beg iron as is
orally supposed. They are composed OF decomposed
iron with iron pyrtes suphide Of iron, sulphide of lea
with more or less other matters. These ores are
Than fhnr
come to DO o1dized the iron floats on the
ton and as We go lower and lower we
find the vein grows richer-u gold and silver princi-
pally THIS deposit. l said. is found In cavity
formed between the limestone and potphyry, and my
Judgment mat that cavity was formed oy the action
OF surface oarDonated water that percOa,ed through
and made that line Of drainage. Then tue stream
Town this line cut out the limestone by solution
and left cavity which has been III ell IN Oy thiS run
blsh which IN duo tme became 9T.ul1ed ana 1Tous9t
lower down shall hnd solid pHrtes instead OF SUI
phides. These Will contain as m9eh Valuao'o ores, al
though different treatment VIII De necessary III roast
ing V ,h nns NJ this description the Highland Chief"
ia one of the extraordinary, simply from the mag
nitude OF the deposit Tho structure Is similar TO that
~ b Colorado Prince" As to the workings there Is
a shaft of SO feol, cutting through the poT
uhyTy, and striking the ore DOdy. From thls
to depth OF loz Ieet mere Is 40 Oo,.udo 70 I'M tne
mines which have been describing. No one knows AT
,t th, extent OF rms assure but IL seems not i'm
probable That 1t w Do OF the great gof fields Of
es 1romisng gold fields that has been discovered
IN tns continent No portion is out that Will not
pay for working It. while was there thirty tons gave
reiurn OF $50 05 per ton. do not know OF any gold
mine In the world, with width OF 80 or 80 feet That
will average $50 TO the ton The California mines nom
10 or 70 is width. return about @lo L. the Ton
I'm the Black Hills In gold mines which are really Day
In Q A width Of 1870 10 l75 feet carries ss 10 and Sll
a ton. Now all OF us who know ahytnln anout
mining do not want any property better than
mat Where You have great quantity OF quartz con
raining gold ana cheHply WOrked0s most OF this nsrd
freed rock can beand find Will stand two tons TO the
stamp at 50 per ton, better proht could be
desired. But these mines ut LeadVlue snow
nromise Of o much larger profit do not mean TO
say they are better oil other mines, but at present
'b' depo,its are found 10 be entirely beyond parallel
Their value runs FROM 80 400 10 - and traction per
ton Tue Silver Cf. Racine Boy, Bassick and other
mines yet understood, ana their geological
TormatiOn has been misIepresenied.
Colonel Montgomery. OF the silver GIN Nine, gave II
a. mia opinion that the cavity was geyser, but
aura assure yein He believed that IL extended far
heyond the limits supposed aud that the supposed outer
paIi Was only horse across the vein. IL had be-
ome the received opinion that these Veins un-