Imperial Valley press., 1915-09-02

y
ifornla in 1914. as reported by Charles
G. Yale of the United States Geologi-
cal Survey, was $20,653, 1876. an in
crease of $246.55 over that of 1918.
With the exception of one year-1S83
the mine gold output of the state
in 1914 was higher than it has been
since 1864-50 years ago.
The value of the. entire mine out
put of gold silver, copper, lead and
zinc in California in 1914 was $25,
710.645, which is 81 $40 less than
the value in 1918. The decrease is
mainly due to the falling off of the
production eff copper brought about
by the closing down of certain large
properties soon after the outbreak of
the war. Since the close of the year
however, these plants have resumed
operations There was an increase in
the output of silver of 93,460 ounces
and of lead of 1851 pounds. but the
output of zinc declined.
In 1914 there were 65S properties
reporting production, of which 31S
were deep mines and $40 placers. The
producing deep mines may be classi-
fled by metal production as follows:
Gold, 277; copper. 10; silver. 7; sill
Ver-lead, 6, and lead, 9. OF the placer
mines, los were hydraulic, 60 dredges,
20 drift and los sluicing or surface
placer mines.
The 3l8 deep mines made an out
put of 2,465,4S tons of ore, of which
Z050.337 tons were siliceous ore, 397,-
S6S tons copper ore, $40 tons lead,
400 tons silver and 16,1S0 tons silver
lead ore. The siliceous ore yielded
an average per ton in gold and silver
Of S552; the copper ore, $1.S4; the
silver ore $S1 Sc; the silver-lead ore,
'$17.03. and the lead ore. $15.SS. The
average per ton in gold and silver
from all ores treated in the state in
1914 was $500. The total ore of all
classes yielded of gold, $11, 90 ,64S;
Silve~. $794,6 ,651; copper. $4,05S ,523;
lead, S165,S25. and zinc $19,S63 The
value of all metals obtained from ores
mined and treated in California in
1914 was $16,61O,5 500, or an average
of SOD per ton.
In 1914 there were treated in gold
end silver mills in California 1.993,-
S21 tons of ore. containing. alto
Cether. $10,743.2 .207 in gold, an aver
age value of $3.50 per ton. and $9l,
327 in silver, an average value of
$0.05 per ton. This gives total
value of $10,834 .534 in gold and sill
ver, OF an average per ton of $5.44
in both metals In milling the / .993.-
S21 tons of ore there was recovered
as bullion $8,637 ,329 in gold and sill
yer. or S4.33 per ton. and from this
ore was derived 46,072 tons of con-
centrates. which yielded in gold and
silver $2,197,205. or an average of
$4769 per ton.
The 449,132 tons of smelling ore
treated yielded altogether metals val
ued at $5.633, $50. OF an average Of
Sl2.54 per ton. including all metals
There were treated also 22.532 tons
Of old tailings. which yielded $50. .624
in gold and silver. or an average of
S3.71 per ton.
The $40 productive placers in Cali.
tornis yielded $9.Os0. $40 in gold and
Sl9,2S7 in silver-a total of S9100.-
1876, which is an increase of $242 $50
from this source over the yield Of
1913. The dredge yield fell off S306.
500 in gold, but there was an increase
in total output from the hydraulic.
drift end surface placels of $55l. .572
in gold, or S244,672 more than the
decrease in the dredee yield OF the
total placer gold the 90 dredges yieio-
Sd S7.7S3.394 or So per cent; the l05
hydraulic mines. 500 ,884, or per
cent; the 70 drift mines. $329.q4S. or
. PEI cent, and the l05 surface or
sluicing mines, $214.6 .623. or per
cent The dredges of the state pro
duced 38 per cent of the total gold
We'd from all sources. The placers
produced Al per cent of the total gold
WELD for 1914. and the deep mine, 56
Ter cent. These average percentages
have changed very slightly for sew
eral years past. There are now so
gold dredges operating in the state,
and since the commencement of dredg-
ing in California in 1898 the total
sold yield from this source to the
end of 1914 has been $71,3O7766 The
three principal dredging fields in the
state are at and near Marysulle. Yu-
ia county, with a dredge gold yield
in 1914 of $2,755,7 at and near
Orculle Butte county. with : Weld
in 1914 of S1,637.5I5. and at Folsom.