The Goldfield news. [volume] (Goldfield, Nev.) 1904-1911, 1907-08-17
EDITOR BECKER WRITES OF
THE GREAT CONSOLIDATED

fully twenty-thrss feet wide IND aver
ages about ,f25. We passed the fourth
level which II reported similar to the
third. On the nth level the old com
pany ran out a long crosscut without
finding Gre. After the consolidation.
the geological stan determined that q
fault had occurred and q crosscut vas
run east At about sixty feet from the
shaft ors was encountered. the nrst as
say returning over $500. The crosscut
has been run to the hanging wall. q
drift has been run south n . stope
started on the footwall side. These
workings expose eight feet OF ore on
the footwail. worth from $500 to $1,000
per ton; six feet on the hanging wall
worth about 800 per ton and about
twenty .eet between. which samples
from SIS TO $40 per on. Underlying
this ore body IL about sixty feet Of Is
to Sc rock.
Down on the second level. the ores
Of the Combination are oxidised- On
the third level sulphide ores are found
except in the north drift. where some
streaks of kid appear Below this
level the ores are entirely sulphide.
The mine is now making about 1000
gallons of water q day.
~ UVfuH&0 " VD~1t1cs ~
level, several telluride minerals are
found with which gold IL mechanically
combined. To these IL doubtless due
the great richness of the ore.
Although II IL said that the Mohawk
has richer ore bodies than h Com
bination. the latter IL probably the most
important mine in the district, at pres
ent, because II as been thoroughly
we'll developed and entirely for COM
pany account, no leases having been
granted on this part OF the property.
A definite plan has been followed. excel
lent models of all workingn are kept
| up. and It is evident that the vein and
ore shoots are understood by the man
agement.
There has been some controversy In
the past as TO the nature Of Goldheld
ore deposits, whether assure veins. or
chambers Of ore more or less connected.
l can nnd nothing in the Combination
to uphold the latter contention. The
walls are not as regular az In some oth-
er regions, but the division between
country dacite and vein matter. ore
which IL more or less silicined. brec-
ciated dacite, Is clear and marked by .
clay gouge on each wall wherever the
numerous crosscuts have been driven
through. Within the vein are rich ore
shoots Of primary origin. ana within
these again bonanxa ore bodies due.
doubtless. to secondary enrichment. The
belief in isolated ore chambers has prob
ably been fostered by the lessees' search
for high grade. which takes no account
Of anything below shipping value. I ma
that competent biologists, OF whom sew
eral are now resident here. believe that
the veins Of this district are true MS
suresr and that every indication. SO far
discovered, Is for depth. In the Com
bination 1 can find no evidence to the
contrary. and much upon which to found
this belief.
The Combination mill Is of twenty
1~.s5o-pound stamps. Originally the ore
was crushed to 16 mesh by the batter
les. and reground In Bryan mills after
passing apron plates. Concentration
with Frue vanners and Whitley tables.
and cyaniding completed the process.
The mill practice has lately been chang
ed and improved. No amalgamatfon Is
attempted in the batteries. but from 20
to rs per cent of the value Is caught
on the apron plates. Shines are then
separated through 15o-mesh screens and
the oversize. about IS per cent Of the
total. is reground in two tube mills.
After passing a second set of amaigam
plates. the pulp is sized and conducted
over canvas tables. where q cheap and
effective concentration Is made. The
cyanide treatment, following. has no
unusual features. The saving IL from
30 to IS per cent with oxidized ores and
about 81 per cent with sulphide ores.
The ore Is somewhat acid. and to neu-
tralize this about twelve pounds OF lime
to the ton are added ahead OF the rock
breaker. The mill Is well constructed
and Is electrically driven throughout,
as is all machinery in the mine.
The water supply. besides that pump
ed from the mine, Is piped in from AL
kali Springs. some miles east of Gold
field, and amounts to $4,000 gallons q
day. The company uses about $4,000
gallons and the surplus is sold In the
town.
The Combination IL a very great
property. The methods pursued in its
development and operation are such as
to inspire great confidence in its future
and in that Of the other mines of the
Goldfeld Consolidated.
For the values above given I am In
debted to the management.