Tonopah daily bonanza. [volume] (Tonopah, Nev.) 1906-1929, 1908-01-11
NEVADA THIRD
in DRY ORES

vided according to its derivation from
placers, from dry or silicious ores,
from copper ores, or copper-lead-zinc
ores, and lead-zinc ores. These di-
visions of the ores from the deep |
mines are, of course, to certain de-
gree arbitrary, and doubt exists as to
proper classification of many complex
ores. In general, ores that contain
2 " per cent or more of copper are
considered copper ores. while those
with over 4 " per cent of lead are
called lead ores. The bulk of zinc
ores contain at least % per cent OF
that metal.
Statistics collected by the United
States Geological Survey and publish
ed in an advance oaapter from the
Mineral Resources of the United
States, Calendar Year of 1906" indi-
cate that silicious or dry ores, which
in general may be considered as gold
ores proper, furnished about 63 per
cent of the whole production and that
placers yielded approximately % per
cent The base metal ores furnished
only about 81 per cent of the total
output, while the tonnage of these
ores was exceedingly heavy.
Placer gold was obtained in 1906
to the value OF 1928, 360.70 fine
ounces, equivalent to $27,459, 1858,
while in 1905 the quantity was only
934,709.26 ounces, valued at $751;
I222,155. Alaska was, of course, most
conspicuous in this great advance,
but California also added about ST.
500, 900 to it's yield of placer gold in
I1906. The increase in California was
the result of dredging operations.
The States which yielded over 1O0,-
900 ounces of gold from dry or sill
cious ore rank as follows: Colorado,
California, Nevada, South Dakota,
Alaska and Montana, Ores of this
class necessarily include many varie-
ties and several different methods OF
reduction are applied to them. The
pan-amalgamation process has be-
come obsolete and is used only at
few places in Montana, Nevada ant
\ Arizona.
Gold obtained from copper ores IL
1906 amounted to 271, 1877 ounces, al
against 255,563 in 1905. This is ;
very moderate gain contrasted witt
the great increase in tonnage of cop
per ores treated, but is, of course, du
d to their ordinary low tenor in gol'
J. and silver. The important State
= rank as follows: Utah, Arizona
Montana and California. The riches
ores are obtained from the Bingham
~ and Tintic district in Utah. Th
~ greater part of the copper ores
- concentrated and smelted the gol
u being recovered during electrolyti
- refining of the copper
i From lead ores proper only 6O2
S12 ounces of gold were recovered
= This is less by about 5000 ounce
~ than in 1906 and emphasizes tn
10 scantiness of the supply of highe
" grade lead ores. Heavy losses
y Montana, Colorado and Utah wei
~ only partly Offset by the smallt
III gains in Arizona and Nevada.
70 gold from lead the States rang
in follows: Colorado, Utah, Montan
u Nevada, Idaho. Cola from Idaf
~ lead ores has been partly overlookt
in earlier statistics 1t is presen
IT. however, to the amount of 25 to
81 cents per ton in the heavy shipmen
III of Occur d'Alene concentrates, al
w most of it is undoubtedly recovere
Only very small amount of go
is recovered from zinc ores. Togeth
So with the silver it remains in the CT
MS der after the distillation of the zir
NJ and these cinders. if of sufficient
en- high grade, are sold to the lie;
pl- smelters. The lead zinc ores a
D" generally concentrated to effect {
10 separation of the galena and sphale
leo tie. A total of / ,691 ounces of go
AT was recovered from these ores
1906 almost wholly from ColoraC
The copper-lead sulphide ores a
NY confined chiefly to the Park City a
VIII Tintic districts of Utah. and the OF
NJ put of gold from this source incre;
ed from 3S,771 ounces in 1905
59,371 ounces in 1905.