Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1904-12-24
monK nF non sPRlNGs.

rites, the greater lart or one or lheHp
jaspery quartz reefs contains llttle or
no told. Microscopic Investigation mas
shown In one case that In such quartz
the iron Of the pyrlte Is probably main
ly Indigenous that Is, that the IRON
sulphide has been formed by the action
OF sulphur contained In the hot spring
waters. upon the iron slllcates contain
ed An the hornblende and bietite. THIS
explains the absence OF gold as the
pyrlte has the same 0rlgln as the bar
rem pyrlte near the ore bodies IN the
country rock az Tonopah. Within some
OF these barren reefs Of slllclhed rock
az Goldneld however, prosnectorH nave
sometimes discovered portions contain
Ing gold, seen In large quantities,
such portions are usually lenucular or
Irregular, Ike the main quartz reefs,
and they are not easily dlstlngulshable
from the barren quartz, except by pan
ming or assayIng; but II seems probable
that these shoots are the real ore depos'
liz. and that the mass Of the reefs
constitutes merely O sllicous Jacket or
casing, such as Is shown 10 surround
ore bodies In some other parts ~ the
world. While this slllceous casing may
bo 81 or 30 feet wide, the aurlierous por-
ton may be only 1 or feet, and the
form and extent Of this portion became
evident only after the ore has been ,'x-
tractedIt Is then seen TO have q definite
channel-llke shape, often more regular
than that Of the whole outcr0pplng reef,
though Il has usually q limited extent
IN the direction Of Its greatest elonga-
ton. II seems probable that these pay.
shoots represent the main channel Of
hot water circulation. while the slllcious
castings are the result OF the voter
soaking through the adjacent rock.
The ores are often Of vely high grade.
As an extreme example may be noted
a shipment OF lAh tons from the Sand
storm (Ken1all claim which, when
worked In a stamp mill yielded A5,1S3
net, while the tailings stlll contained
about 1000 10 the ton From the Nc
Kane Bowes lease on the Jumbo, $780,
600 was taken out In five months. from
a space ot 100 feet horizontally and 200
feet vertically ON the sheet one small
shipment of 9l7 pounds Of ore from
this lease gave gross returns Of 81 1866
The whole production OF the camp has
been from ore which may be roughly
estimated as averaging 5000 to $500 per
ton. or more The values are all IN
gold silver IL usually practically alb
sent, although the shipping ore from
tho Combination mine contains from 1
10 3 ounces.
II IL important to consider the origin
Of this rich ore In order TO make pro-
phecies for the future. Most OF that
which up 20 the present time has been
extracted, has been oxldized ore. The
ors are mixed sulphldes casually pyrite
and 0Xide) clear up 10 the surface
The oxidlzed material, which follows
cracks and seams is usually several
times sometimes several hundred
tlmes) az rich as the unoxIdi2ed pOr-
ton, The irregular spongy nature OF
the free gold particles In such oxldi2ed
material completes the pr'f that this
gold has been dissolved and redeposltod
IN concentrated form during the pro-
cess OF oxidation, Iron sulphate de-
rived from oxidation OF the pyrltes
is the probable agent A peculiar yell
low coating pointed out 10 Mr. Spur
az the best sign OF values IN the oxl-
died ores was shown by Dr. Hillehrand
10 be a basic ferrlc -alkal sulphate,
containing both sodium and potassium.
perhaps jaroste other sulphates,
such aa alum and gypsum. are,abundant.
These oXldlzed ores are prepared FOR
shipment by screening, the fines being
shipped and the coarse quartz rejected
WATER LEVEL HIGH.
As the water level at GodRed is
usually high for this desert country
(water having been encountered I'm sew
eral shafts at from $50 10 200 feet Il
IS plain that this oxldlzed ore Is only
temporary supply. In the Combination
and the Florence, however sulphIde ores
Of very high grade have been found
below the oXldized zone In these mines
a dark gray cOpper-bearlng mineral.
which is very rich, is most intimately
connected with the gold A specimen
from the Combination, analysed BY Dr.
Hlllebrund, proves TO be a sulpho-
Of copper anthony and arsenic which
so far a3 qualitative composition goes
may be tetrahedrite. Tollurum Is al
So present I'm this ore. and the same
element has been reported elsewhere IN
the district Therefore the sulphide
ores also may be very rich. Moreover.
while the difference between the oxl-
died and the unoxidizcd portions Of
the ores within the zone o. oxidation Is
IN general so great certain shoots oc-
cur, as In the January and the Jumbo.
where the unoYidl2ed quartz in this
zone IL Of extremely high grade. Such
ore appears 90 Doe mostly pyrIte. but In
View of the fact that tellurlum s found
ln the district Il Is very possible that
gold telluride may be present. II there
fore appears probable that the rich oxi-
died ores owe their richness not pri-
marily TO concentration during oxIdiza-
ton Though this process has certainly
been very importantly. but 10 the ex-
istenoe u sheets Of rich antecedent
(sulphldc) ore
ORIGIN or sULPHIDEs,
Concerning the origin OF these sui
phltes, II Is probable that some 40 far
as can now be seen, are purely primary,
while others have been formed sub
sequently to the main sllicincation OF
the reef, as in the Combination mine.
Here the rich auriferous sulphides have
formed IN q broken zone (breocla- zonel
In the sillclhed barren reef and occur
90 t'''ltlEt anu NAAEN NN NhhNlNES on Ale
F'bbles IN the braccia. The question
arises, however as to whether the sub.
sequept naturalization was the result
I OF descending or ascending waters.
Concerning this the evidence IL not
conclusive, but there is no sufficient
evidence that these rich ores have been
concentrated from the lean antecedent
quartz mass. The presence Of clements
Ike arsenic, anthony and telurlum
IN the subsequent sulphlde ore suggests
deep-seated origin,
OCCURRENCE OF BISMUTH.
Besides the elements mentioned
above, bismuth occurs IN the ore. In
the January 4 occurs In the oxidized
ores In the form OF silyery scales. which
is, as determined by Dr. Hillebfand
bismuth, perhaps the oxide bismte, II
the Combination long needle like crys.