The semi-weekly miner. [volume] (Butte, Mont.) 1882-1886, 1882-02-01
They Never Give Out.

History shows that wherever true
assure vein has been found 1t has never
been worked out. Such veins have
been, in fact. worked for ages without
any perceptible diminutiOn in their
yield. Where ores have decreased in
value, the ore bodies have increased in
size, the increase of the one cOll,pens,,-
ting for the lOss of the other. Some
have even increased their yield. the
| quality Of the ore remaining unchanged.
Others have been found to dcteriorate
from veins OF silver to those Of hslscr
metals. The latter is. in fact, the most
disastrous Of all the vicissitusles attend
ant upon silver mining.
Some Of the silver mines Of Mexico
have l'een abandoned time after time.
and have ;as often been rt~o!'cned ;,y adj
ventur0us spectators and found to
yield largely. = The Naienci.;na
mine, OH the Vcta Mn,lrc Of Guiana III
to, was re-"penet' in loo, ON u part OF
the lode considered formerly tO IL. 1T no
tlred feet, Il bonanza WAS struck which
yielded, up to 1910, S:ai. 4d,,. PM. During
that time u town Of 1000 inhabitants
spr:lng up there. Then the rich ore OF
the mine gave out ut the l,:!aaLfOt level.
4 large shaft was then sunk ::..,Hs, feet
and ore found, but Oi too low grade to
pay for working, consesi ucn;ly the mine
was abandoned and allowed to fill with
water. In 1925 the An.lo-Mex;.un
company drained the mine of water.
but the expense Of pumping consumed
all the profits Of mining, au.l il passed
into the hands If the United Mexican
Company, and has since ixxn made t.
Yield largely. The Vcta Grln.lc. ut
Zacatex.,s, from 1853 tO ISL. yielded
$aS, OE,, ,Nx). = :; Near the surface.
the ore Was exceedingly rich, hut to-
came poorer with depth. although. more
evenly distributed through, the vein.
For some time ii was abandoned on this
account, hut ut present is Welding well.
In tine two mines above mentioned. the
ores are "f lever grade ~ the .ic!tl, is
increased, hut the equal dist ril,utico ri
the orr Throughout the lsxlc. together
with the large amount yielded, make
them the source Of an immense pys"lut-
ton Of silver bullion. 1t is inn "rtam
to note. however, that Throughout all
the levels Of these mines the ores retain
their silver-tks,ring quality. In thu.
central Part If Mexico this is also the
rule, while further north, where, on and
near the surface, the Ortr were rich in
native silver, the ORES grow ."'rrr
with depth, owing tn the pretlOlIi-
ncncc Of lead, rendering them "f ':,scr
quality. This il true Of mime, also in
the Cnrpathian mountains. in the III ines
Of il,el,:nitZ, and in the vein Of the
Gross CRUDE in Fci>ols,nya, allO: whicl.
yielded immensely near the sur.:ur
where they were worked by tn" 'i"'
mans.
The veins Of HartZ mountains show
the same deterioration, and it is only on
account Of tho large quantities OF low
grade ores extracted that they can !"
worked viii, profit. The veins Of the
IIartZ mountains have lxrn followed
down over 3.,'HW feet. and those Of the
Shemlnitz nearly 4,tkrI.
In contrast to these mines are those
of Frci',urg, where the ores, like those
"f the COl,,sttnk, increase in richness
with depth. The mines Of (l,':,l"Ict', in
Mexico, belong to the same class.
The veins in all these mines, however.
are narrow, and frequently cross them
selves. forming kind Of network Of
assures. The same il true Of the mines
Of C!,anarc.iIlo in Chilli, (Iuat"rrs' IN
Mexico. PaacO in Peru, Frcii,ery IN Sax
Ony, KOnSi'cry IN Norway. Austin in
Nevada. All Of these, however, more
ar less resemble the CoIlStOck in retain
ing the richness Of their ores III great
d'pth.-Er.