Mineral Point tribune. [volume] (Mineral Point, Wis.) 1854-1858, 1854-08-16

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your paper TO correct some in article on
Mining at Mineral Point that appeared in the Ga
lena Daily Jqfersonian few days agoz The wri
ter in referring TO location, 1.-THE Dreadnausht
Nine saws :. This ridge is about half mile wide
and bounded on each side by a small spring branch
which enIpties into the Pecatonica river. The
sandstone which under lies the upper magnetism
limestone, crops IN these valleys. and has dip
of about ten degrees from each water course to
the centre of the ridge" l an not disposed TO
question the truth of that theory advocated by
very able Geoiog.s W % visited US two or three
weeks ago, namely, that valleys the anti
clinal and our hills the synclina axis. But ] am
disposed to think that unless the writer get
better evidences than those drawn from this ground
to support this theory II Will be time before
ii will be set down established fact. 1t is
true, all outcrop of this sandstone may be seen in
the Western valley above ard below where our
creyices ntersect it, bat where the creyices
the valley, for several hundred feet, sandstone
is to be seen, but buff limestone low the wa
ter course. In the Eastern valley there is out
crop of sandstone, but it must be evidently one
hundred feet below the water course. Hence, the
water course to the centre OF the ridge is oniy
conjecture.
His remarks Oh our eastern branch Ga mining
term) of mineral is calculated to lead stranger
into error. " This lode, he Observes "was fifty
feet wide, and worked from the grass roots east,
and in two hundred and fifty feet west, dipped sew
eutv fee, and has been followed by opening un-
der fifty feet OF limestone" You aware that
the term opening, in this mining region, invaria-
bly, conveys the idea of beng fiat; or horizontal =
In this it is by no means applicable TO this
mineral deposit. Although this branch of miner
al has been worked one hundred and fifty feet in
length, least and west fifty feet wide and seventy
five feet deep, it has never assumed fat or a hor.
lzontal position, but so far as it has been proved
has a dip az the same angle. This / grant is an
exception 10 most of the mineral deposits in this
lead region, and 10 the Derfcal observer or the
practical man whose information has been obtain
ed from those limestone beds it may be an obec-
ton. But the man that has seen mineral deposits
IN other mining regions and has observed their
course as they have penetrated other and various
strata and increased III richness and strength as
they go down, Will see in this feature that will
not merely inspire hope that our best mineral
ground is below us, but will induce him to spend
his last dollar in olowing il with the utmost
fdence of being rewarded. Ii would be to a
very interesting subject to bring before you here
the analogy that exists between this and other
mining regions, and between this and mineral de
posts OF other mining regions. But lest | should
be intruding on your space, will only add that
the position above referred to- is almost invariably
the position of deposits in England, and espe.
cially in Cornwall The ore though found in
lodes. or veins OF a regular east or west course,
Will have dip east west. Hence, it is often
the case there that shaft sunk in the centre of
bunch Of ore the surface, at the depth of five
hundred feet will be five hundred feet east or west
OF the ore. There other very interesting fea-
not fully brought out.
This lode he observes was in the head of a "a
vine, where an east and west creyice crossed |
confess it is little difficult for practical writer
to distinguish between a lode and a crevice but
we must submit to the definitions of scientific men
BY the lode he doubtless means the mineral depos
It, and by the crevice the hssure in which it was
found Going east from this mineral deposit ION
the so-caled lode) we have not only one crevice
the writer observes, but five the middle one be-
ing the largest or master crevice; these crevices
aie but ten feet apart. In this form they contin-
in a course about east, have been worked sever
al hundred feet and have carried mineral so far as
they have been worked. in places very productive.
After long and careful examination of this ground
, am disposed 10 adopt this conclusion that these
five crevices nothing more than one large lode
crevice split into many parts in consequence
of traversing this horizontal strata and in their
downward course will approximate until entering
strata more favorable for mineral veins where
the rock that divides them will be decomposed and
| recorded fit matrix for lead or copper ore. Is
not this very beautifully exempliied in this min
eEal deposit already referred to where these five
crevices thrown into one large lode fifty feet
wide, the rock that divided them being broken up
and most of it decompoSed and mixed with ochGt
| (decomposed iron) iron pyrites and calcareous
spar, formed matrix in which was embedded
lead are in quality and quantity that would be
an honor 10 the most productive mining region
IN the world. Where is the man of sound judg-
ment, that can stand upon this ground and reflect
those facts plainly set before his eyes. And
/ especially that from this little place (where COM
| paratively children, have been playing) has been
/ taken, according 20 the writer's own statements
four or FIVE million pounds Of ore and that this
! lode (though not quite so rich for ore) is not
closed IN depth but composed of the same mate
rails, and in lis downward course as to traverse
one hundred and fifty feet Of rock equally favora-
ble for mineral, without being forced to this CON
cluson that there is here the strongest probability
/ not only of fair remuneration for the necessary
investment but OF bringing TO light oar deep and
large mineral deposits, (of which what we have
had Is but the out crop) which will bring into
high repate our long neglected west To inves-
usate this mine we invite every scientific man who
may pass this way assuring him not only that
these features and facts existing there but that
these are but few out of the many features IA