galena, and zinc }
and electrum. M
quartz gangue, but
be called a quart:
of the ore in the

a ton in tetrahe
silver minerals, an:
gold and electrum
porphyry containi
rocks. Deposits n
Salmon River dist
contain too little

silver type of ore s

By increase in
the gold and silvei
much lower grade
Marmot river, for
feet wide and cons
cipal mineral is ga
tetrahedrite. Exan
where gold, silver,
mining. Deposits
and must be conce
content, as in some
complex ores, none
mineralization occu
they are veins with
Some of the veins a
phide mineralization
veins on the Harner
as on the Ben Bolt
tabular bodies 100
ite, galena, and sph

The deposits o:
have a distinctive
deposits are related
features of this type
and the writer belie,
widely distributed a
able that gold and «
that occur near the
and copper-bearing
temperature conditio
appears to be a zon:
lith.

In Salmon Rive
deposits of this groi
affords gold and silve
district the ore minx