The Hartford republican. (Hartford, Ky.) 18??-1926, 1914-08-07
ORIGIN OF METALS.
Varied Theories as to How the
Ores Are Formed.
NATURE HIDES TIE SECRET.
Science Has For Centuries Tried to
Wrest II From Her, but Biologists
and MneraIogisss Are as Yet Unable
to Agree Upon the Process.

Wrest u From Her, but Biologists
/ and Mineralogisss Are as Yet Unable
/ to Agree Upon the Process.
You have read of that legendary In
I dian who while chasing game on Il
| Bolivian mountain side seized II bush
! to prevent himself from falling, and.
the bush being pulled loose from its
scanty hold on the rocks. he saw its
crooked roots grasping masses of
/ cleaning white ore and thus became
! the disc0vcrer of the famous silver
mines of potOsi.
You have also read. perhaps with
| itching fingers. of proSpcctors picking
up nuggets of gold worth thousand
dollars each or opening veins of quartz
all shot through with heavy threads
Of the yellow metal.
You know that ores of gold and
silver or of any other precious or use
ful metal are not to he found in every
body's back yard. but must be sought
for In certain favored parts of the
earth
But has your intelligent curiosity ever
led you to inquire how those ores came
to be where they are and nowhere
else? Have You ever wondered what
makes II gold nugget?
Possibly you think that gold and
other metals grow somewhat rs fruits
dO-in soils and climates that are spe-
cially suited to them. Well there il
considerable truth i'm that idea. and
the word grow" Is. in one sense. sur.
prisingly applicable to such deposits.
But there is great deal more In the
matter than you would imagine. and
on no subject has science fought more
battles royal than on this of the origin
of metallic ores. think that there are
some geQlOgists who would rather find
out this secret to the very bottom than
discover the richest lode that the ribs
Of the earth contain. II they could do
both that would be perfection. and we
must not forget that knowledge is
power.
Until about 400 years ago everybody
who thought about 1t at all believed
that veins OF precious ore were dis
tribnted under the influence Of the
planets. At that time astrology held
the place of science.
Finally George AgricOla. German
mineral0gist. who lived about the time
when the gold and silver Of Mexico
and Peru were making Spain the ten.
pOrary mistress VI the world, hit upon
theory which came I'm substance Very
near the truth. He taught that water.
penetrating into the earth and becOm.
Ing heated. took mp scattered minerals
In solution and afterward deposited
them US ores In cavities In the rocks.
The mineral solutions he called the
earth's Juices"
A couple of hundred years later the
German ge0lOgist Werner set forth q
view that became very famous under
the name of the "Neptunist theory"
from Neptune. the god of the sea.
Werners idea was that as the earth
cooled down from the primeval nebula
out of which 1t was formed 1t was en-
velOped IN n universal hot ocean. hold
ing in solution all kinds of minerals.
and that when the rocky crust was
formed the water leaking down into
1t deposited its metallic contents by
chemical precipitation in veins and
lOdes wherever the circumstances were
favorable.
But u hundred years ago the Nep.
tunist theory, which had swept every.
thing before 1t in the minds of men
OF science. met its Waterloo at the
hands OF Hutton. the Scottish geOlo-
gist. with his "Plutonic" theory from
Pluto. the god of the Internal regiOns,.
Hutton's idea was that the materials
which ill the metallic veins were melt.
ed by heat and fOrcibly injected into
the clefts and assures of the strata
from below
The "Neptunists" and "Plntonists"
had hard fight. with the latter hold
ing the upper hand. until their theory
had assumed kind of compromise
form. with water again playing the
principal role. The American geol0-
gist. Van Hise. is the author Of one of
the latest theories. according to which
meteOric water condensed atmospheric
vapOr, penetrates deep into the earth's
crust, and. with steadily increasing
temperature. takes up mineral matter
into solution. Spreading, as 1t gets
deeper, the water reaches larger open
ings In the rocky crust. In which 1t
ascends. with decreasing temperature
and pressure.
There It deposits the ores. whose ma
teriais II has collected In its wander.
ings and carried along in solution.
But this is not the last word. and In
recent years there has been a partial
reaction toward the Plutonist theory.
Besides. a great deal seems to depend
upon the nature Of the ore whose orr
gin is In question.-Garrett p. Serviss
In New York Journal