The Elk Mountain pilot., 1881-09-01

the larger ore bodies in Utah. is SIM
ply argentiferous galena, and Gentle
Utah is often spoken of POLITICALLY as
Utah Argentifera.
But some folks say" that carbon
ate of silver and lead was once galena,
and not verylong ago either--as Ma
ture counts time-and it is fact that
ore Is occasionally found in.which the
metamorphosis is not quite complete.
In the Emma mine, Utah, while
shoVellng up carbonates as lose as
sand, one often comes upon solid
chunk of galena; but in the Ophir
district the carbonates are bright and
free from other ores. A pile of ore
just from some Of the mines there
looks to a pilgrim " very like a mix
ture of sand and lime-the chemical
union is complete. The great car
Donate belt at Leadvllle has i north
and south course, while the crevices
dip eastward and into the hill, (Which
slopes westward,) not more than one
foot in three or four-say 80 as a
rule. But there are 90 many faults
and displacements, and in few IN
stances such enormous cavities in the
rock, filled with ore, that, instead of
contact veins, they are
DEPOSITS.
IE general terms, a deposit mine is
any big cavity In any kind of rock
filled with ore. When small they
are called pockets. As to formation
the same reasoning heretofore set
forth applies to them. When the
fracturng force reaches peculiar
condition of stratifed rock cavity is
the result, and in Western Utah there
is evidence that some rich deposits are
the result OF wear, slow subsldence o.,
uphoayal, and in6lteration. Thus the
remarkable series of chloride mines On
1L:oss4Rl, a5eve Essts sES1J 44i(t
are nothing more than caves in which
more or less ore has been deposited.
At Leadville the ordinary slope of
contact veins is often changed by
waves of the ordinary limestone, or
drops of the underlying rock. The
result is a deposit, though these are
evidently the result of displacement of
the original strata. One such deposit
there, of carbonates, is SO feet thick !
By all odds, the finest specimen of de-
post mines have seen is the noted
Emma, of Little Cottonwood, Utah.
Of course deposit must be found
and traced from some indications on
the surface and from nearly all de
posts there is something like true,
though very irregular, crevice upward
and downward. Not infreOuently a
series of deposits from tens to hun
dreds of feet apart, are connected by
thin strings of ore-just enough to
guide the miner. Such series might
be well represented by a number of
egg shells hung on thread. But after
the miner has "spooned out " one
cavity, there is no great certainty in
what direction the next one lies, and
he may follow the thread long ways
at cost of $40 to $40 per foot be-
fore he finds it. 1t is obyious th4
limestone, from the nature Of its tp-
osition, would be more apt to form
deposits than any other kind of rock !;
and as matter of fact, all the de-
posts | have ever explored were in
limestone, or, at any rate had that
for bottom rock:
CASH VEINS.
If the reader will take broad-ax
and strike it into the earth,. he will
have a fair representation Of cash
vein on a small scale. At the top they
are dcceivingly like true fssures, but
soon show their real character by
narrowing as one goes down. They
are presumably the result of some
force which fractured the mountain
from above; are wedge-shaped, with
the narrow edge down, and ere long
terminate in permanent pinch. It
NAV be noted, however, that there IS
a small but respectable class of writer's
who maintain that all veins are really
cash veins, the only difference being
- y. t,a