The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1900-03-02
HOW QUARTZ IS FORMED.
Its Many Different Types Come
From the Same Process.
DEPOSITED FROM A SOLUTION.
Agencies That Act ON silica 10 Dis
solve and Thus Prepare IL Tor
Precipitation mt the bottom OF
the Ocean. or in Its Deposits with
Metallic suiphides TransverseIy
In the Rocks-Bedded Quartz.

Metallic suIpbides IrhnsNerseS
In the Rocks-Bedded Quartz.
How Is qnartz formed2 This is a aaes-
ton frequently asked by miners and mine
owners seeking an inteligible explanation
y Of the intricacies OF their ore deposits ana
shercwlth q reliable hypothesis by which
their exploitation shall be governed. Inc
a riet nod Of It's formation is closely con-
ueefed with tho form and extent or It's
main bodies. and a trustworthy statement
OF rs mode OF origin would enable one
to understand II not anticipate, many OK
the perplcxng phenomena connected Win
metaliiferous quartz deposits
Quartz, as understood by the mineral
aQiat. IL OF many different types nearly
all Of which, however. are the result OF
enc and the same process OF formation,
though considerably modified by the gem
eral conditions under which II operates.
Nearly all bodies OF quartz are the result
OF deposition from solution. Silica, as
quartz IL known to the chemist. Is soluble
10 small extent IN pure water, and 70
much greater extent in water containing
such substances az carbonic acid or solu-
tons OF alkaline csrbonnter
Dissolution of silica.
The water circulating through the rocks
OF the earth's crust contain varying
amounts OF these substances, and II ac-
,,.. ~. 1870, !, ,h ,ar"a,,,as.
=, 80, ..a.,,. 4, ,rts, Itur,o,,s
acids. or ihoae resulting from the decay
OF vegetable matter. etc. dissolve silica
to considerable extent. and surface
waters penetrating the soil and the under
-. - =, 80. .s,,san,. .rh,eh ,,,,ckly
$3.50, -. ~, s a,,ss.t',a "a rasis,
.,,,s.,a .,i,,,.., ,s,,r' st,,s, A., srin.
.tp ~ -. 49,. st,,. ht.h ,a,,,,.,r.,,,
W, ~ 49,. AZ ,.,,,.sh ~
,.... ..as, .a',.s Il Z, 49,, ,a,,,
,s,, ss', ~, ~, -, st,,', "''' - ''o
~, M .'..,,.s ~. a..r,,,,,,s r,rass,,,o
80. -. ..,s,.,. ..,., =, 80, 49,.
$50 IN, $3.50 @e,,-ar,,, sap,~.
\, ~ se,s.,'n, aa,ta, s,,tea nra,,.h,
ai,,ar ,,nn, na., ,ha s,,,s,ce or from, ,e'
49,. - 49,, s..s..,u, -, 80 ,.aa,,,.
an'ns ~ ,"sn ~, ,et,,,, 49, ,',.a.s go,
,,,ns ~ ,nr,n. 81 radenast,,on ana cons..
aurntIv IN RECOMMENDATION. This. process
81 quartz fofmation occurs either upon ne
walls ~ omen assures ana along plane.
or lines AZ rei,ey.d nressure or else where
rna,aIss, ,s,,',t,,s F,c,,,, s,,rh ~. o. A.
. - ,'s $500. uA''' -, ~ y, ".
Mros "" so,ven' power OF ths wafer car
Lying me s'iiea'
Aotvcut poxxer of Sen water
sea wa'''t, Wh'oh ai""Ss npus fa''ey
q substances capable or slhihs IN the
an accumulation OF surface waters drained
orr by th, rivers has accordingly more
than an ordinary solvent power upon sli-
y. .na ,narasaro contains r,,,ch ~ !, 4,
iea; anu 'nV,eto't '",'alhs ,i'Nn ~ /" ~
auuiuoh 70 tnst WhieA - "atiea ihto 'he
sea soeh ns ny me streams anu conceal
Silica IL pracipitatcd from the ocean
Mater for the most mart through the aaen-
~ ar miuuta arsaulpns az nrAaiolnri
,,.,ar,a-.a, a.. .,h,sh u,.t,.. ~, s,sl,,,
's'oo'aN'""t WV "u'Sit "N'"N az" e"tni-
sioua remains upon Inc sea bottom These
..,saoie re,paips treouentlV form, thlek a.
.,,,.,,. ,,s,,tu "a ,,,,t.,, ~, .,,,t,,,,r,. an,
~ ,,n1r,, - =, sa.. ,s n'
% WhiVh - Slowly transformed INTO hafA
quarts, which upon subsequent elevation
above sea water forms extensive areas OF
country rock, There are then two sets OF
widely differing conditions under which
s,yAoly.d sfIira NAV exist ,na cnryaanona
Ia.t,. 80 1891, tte,.5,,t i..s, ~,
,"ss -, ,"', 49,, ..',.s VI
HaAttk feAHn from He haA' oeposluna-
Metallic suiphtdcs With silica.
gntttin, IN ~. ,,src,t ~, ,,,a~t,. IN
forms 81 quartz In tho solutions irnV.
.nnalally aernrneanielI h,. e,cstor' ",
sucntlnr aaantfflss ~ mai us,A s,,tsstt
whi@b avsntnsiiy norm tsrsr n.,reeotas,
,nt,ass, ''''' VIZ "'N V''"' t'"he
Iedras veins ana lenses AZ a,nytr a,.
familiar to ali working III q ininera-pra-
49,, ~ nattsnst S,s,,S ~ s''''., ~
,nor~ er iexa MARY VsrfireI An n,tsttioT
though sometimes almost hor 'aonfal. or
NFtegtAf. " ahNpN tsfS conform 70 the
ncuhaafies ~ the arlEihRi spaCcN IN which
thsN We're tafnei - anected also by
subsequent distortions ant displar efnents
successive aceoSlte af qatylk alohs the
ssNAtia of = hsssfc ef othef Hpacc pfoJHfs
what y known a. the ubtun STRUCTURE
IN thr VIC "a. HNt a statement ~ All ihe
forHss 81 VEIN aNhf's cannot ne Attempted
...tA xH...a,.,t,a an, u..t,..s., oun...
..s.tssi s.e,, t4,N s3.tr,slsto1, ~ ,,rs,.t.t