The new North-west. [volume] (Deer Lodge, Mont.) 1869-1897, 1876-10-20
Pern,anency. Of Veins.

~ We take the following from recent num-
Der Of the Mining Reoieao and commend it
to amateur miners as correct synopsis of
the art of prospecting, and a compact re-
s'tnae of mining peculiarities & s. ~
Our ideas in regard to the future Of veins
of ore must depend largely on what has
been found to be the case in mines that
have been developed to large extent A
large amount of trash is annually written
oo4be.--aas.paa,aor.ou- Of ra,i,a9e- and ,nnch
fissures.''U OF course it is interesting to
speculate, and infno wise unprofitable, pro-
yided the speculator2has some basis of ex-
perience or knowledge on which, to build g
his airy structure. So long, however, as
we are trying to induce men Of means to g
expend their money ON cur property Qor
mining is a business that requires the aid
of capitaD it will not do to use arguments
es that will not stand investigation. It is an
easy matter to cite hundreds of examples
of permanent veins, and it is equally easy
to enumerate as many that have been ex-
ceedingly intermittent and unstable, SO that
the argument drawn by, comparison with
the Comstock, Veta Madre, Yeta Grande
the Ramelsburg and others, loses its value
to any thinker, Immediately it becomes un-
derstood that there are several different
classes of veins and that each has its pecu-.
| liarity. sr ,. r.
I Minerals occur in five ways, viz AS
1 r= IA e. All. .R- :
beds, as surface deposits, as veins, as seq
regations, and as impregnations.H 9t 'Eag 70
as Let us now define each Of these SO that
they may be recognized:ai si1 7 daf1kl5
Ore Beds are aggregations Of ore lying in ;
bands or seams, parallel to and between the
stratifcation Of rocks and, like the rocks.
. enclosing them, deposited successfully by
the precipitation of the minerals from So
luton or suspension in water. AS a rule
these deposits are horizontal, or nearly so;
are quite uniform in width, condition and
composition. e gigi8 s8a2 fge sahi4a 4.
Surface Dsposits include placers, bars and
occurrences of mineral derived from for
nations that have been broken down and
washed away blythe actions of the ele-
ments,aasa s birgd 2aeamo3 haoaI.EG buast
Isl Veins are aggregations Of minerals in fis-
sures in the rock. t.gsoi, moi siB 5 ea a ssd
.IoasSegregatioas are bodiesraof ore whose
shape is very irregular. but which have
definite limits. Each segregation is alone,
and has no necessary connection with any
ether.
i s..Impregndtions are deposits Of ore occur
i ing in seams, cavities or cracks ii the rock,
/ having no defined limits and no regularity
Iof formation. ,'s @'
"A vast majority Of the gold and silver
mines Of the west belong to the third class
j of deposits, viz: veins. Veins are divided
into four classes z ss,ssss' ssa IS :
E First, true veins; I'd, bedded veins; Sd, !
Iicontact veins, and 4th, lenticular veins. All
OF these are assures. Hence when we speak
of flssnre veins as being inexhaustibls we
4 are liable to an error, for of the three class
les Of veins, but one--the first practical"
~ inexhaustible. os s yas9a sasl
Iasl The permanency Of veins therefore de-
i pends directly upon the class to which they
3 belong. As rule II may be held that the
more regular the formation the more en-
during it is likely TO be. When, therefore,
4 we find d vein having 4 we'll defined and
/ straight course, with firm granite walls, we
may reasonably conclude that it is liable to
hold out. aa 5sasz s.ss esa 3 8
!. on the other hand, If the deposit is found
in lime stone, has no regular outeEop and
Il trend, varies greatly in width and direction,
! and il generally ifregular rim It's shape, Il Ii
safe TO coneludss that ii may end suddenly
at any moment 1T Munld, however; be err
roneous ty acduce from this that limestone
4 deposits are less profitable FOR Investment
!. than those In granite, for the history Of
EAmerican mines proves that this Il not the
case KE Esssll4 y. e 9 ssssE EEs.slE ID go -