The Harrison times. (Harrison, Boone Co., Ark) 1876-1938, 1901-02-02

9HPPo' VI TINS optnlou we ma
there practically no surface indca-
lions as in Northern Arkansas, and
that the deposits are mainly cayer-
nous, pockety, horizontal, in rooms
are. prineipaIIy puneneu aouur
common centres and in sinks which
for the whole area, are very limited
in number and appear to have but
few, if any, connections. The ore
occurs in a breceia consisting of
ebert and limestone fragments that
apparently resisted disintegration
and were in many instances carried
and dumped with float ore and clay,
into the receptacles. Possessing the
afhnities that existed before the
disturbed and broken state, unity
set up to produce the present condi-
ton.
Under such state there necessarily
would be great richness in places,
there is also limit in quantity, and
more thin localities than rich ones.
Complete exhaustion is purely a
matter OF time, money and energy.
1t was this prospect in sight as one
important cause which led to deeper
mining with the result that, below
the so-called bed rock" and in, or
approaching, the very same silhro-
magnetism limestones that carry the
zinc of Northern Arkansas, more ex-
tensiye bodies of mineral exist than
had been mined above and in the sub
carboniferous formations to a depth
varying from grass roots to 60 feet
or more below the surface.
The following interesting hgures
are taken from the Crossman
Brothers dliil CHART and apply
exclusively to the Joplin territory.
They express the percentage of holes
drilled in which lead and zinc were
found.
500 holes, so feet deep, 8 per cent.
$50 holes, 100 feet deep, Sper cent.
400 holes, $50 feet deep, Is per
cent.
1856 holes, $50 feet deep, "a per
cent.
100 holes, 800 feet deep, no ore.
25 holes, 400 feet deep, no ore.
II holes, 500 feet deep, rs per cent,
40 to 60 feet lead and zinc.
8 holes, 600 feet deep, so per cent.
Is holes, 700 to 800 feet deep, no
ore.
6 holes, 900 feet deep, so per cent.
6 holes, 1000 feet deep, no ore.
2 holes, 100 feet deep, so per
cent found zinc ore at 1875 to 100
feet.
8 holes, 1900 feet deep, no ore.
2 holes, 400 feet deep, no ore.
l hole 2005 feet deep, flint and
limestone same as at the surface.
These figures speak volumes. They
show that the vertical thickness of
the sedimentary formations is at
least 2005 feet and it is uncertain
how much more as the drill did
not reach either porphyry nor
granite. 1t will also be nothing
that the chances for ores of lead and
zinc are greatest at a depth of 259
feet, and again at 500 to 600 feet,
while zinc ore was found at 1915 to
HOO feet but no mention is made
here OF lead. Only one hole was
drilled to deyth of 2005 feet and 2
100 feet, which could not be look
ed upon as much of test to be
applied to considerable area.
The $50 foot holes of drill chart
extend below this formation and
very probably into the siluro- mag
nesian limestones, which is the same
exposed mineral-bearing group of
rocks of Northern Arkansas. Sure it
is that the ones 500 to GOO feet do.
No one has yentured yet to say
definitely where the marble of
Northern Arkansas belongs in the
geological scale, but the writer at
tempted to determine this in passing
uorthward from the state line, and
now feels fairly assured that shortly
after crossing White river it has been
completely eroded, or that still fur
thor north it's complement is to be
found in the existing Burlington
Limestone, which is at the base oil
the sub-carboniferous at Joplin.
II this he true, it will be seen that
when a drill or shaft in the Joplin
field passes through the lower Bur
lington it is equivalent to being be
low the mnrhlc In Arkansas which is