Application of the dithizone heavy metals test to uranium from the Chinle Formation, Arizona

(1)

(2)

Neither the United States Government nor any agency thereof, nor any of their employees,

makes any warranty, express or implied, or assumes any legal liability or responsibility for

the accuracy, completeness, or usefulness of any information, apparatus, product, or

process disclosed in this report, or represents that its use would not infringe privately

owned rights. Reference therein to any specific commercial product, process, or service by

trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or

imply its endorsement, recommendation, or favoring by the United States Government or

any agency thereof. The views and opinions of authors expressed herein do not necessarily

state or reflect those of the United States Government or any agency thereof. ·

(3)

OPEN FILE

Files

Roland F,. w1:-ight, Geologist,

Geologic

Br~ch$ ED~

GJOO

;1..j

z-/7

I

TE:;llUCAL

~~ORANU!J1.1

#92 - APP'...ICATICJN OX" THE

:OI'.t'IU:ZOrffi F.Blr\TY-MEl'AJ .. S

TES1' 1'0

UR/.Jatn~

DE?JSl'l'$ OF THE CHThl.E

FOiuYJlT!Ol~

NEAR

CAJ1ERON,

.f!JUZONJ\.

liBSIRACT

Dithizone tests·

indicate

that Ul:'t:U'dum-bea.ring

alt~red

sandy

mudstone

lel'l.f!es in the Petrified Forest mew.ber of

thE.:~

Chinle foX"!liAtion near ·

. Cameron

eomruonl.y

have

a.

high

eont~nt

. of zi!'..c, copper and l$ad.. The

greateat

conoentr&tion

ot

hear.r metals is· usually

in

the lO'i.e(er

25 feet

o£ the

deposits~

· a.nd

in

some looa.lities

may

reach several. thomla.nd

ppm..

in the

lo't.fer

pa.r-ts

11 inc~..a:irtg

toilfar-d the most depressed a.'l:'ea

of the

S2,ueer shaped

deposits..

The heavy metal. content in 'll:rll!rl.neralized

or mlcltered Chinle ia usua11_y

less

tr~

150

ppm~

l~JTRODUCTIOH

A geochemical. study was made

in

the Cameron a.l'ea., Arizona,

to

detennine

the usefulness ¢i' the

dithii::On~ .h.e~

metals test (Hui'.f

1

1951) in

l<>catirt.5 ore deposits

and develolf'.;..ng

ore bodiee: after

msc~cy

...

89.mples for geochemical stt..>dy were

col~ectoo·

OV€:r

a.

period

trom

August

through Novemher;p

1956,

·from the Petrified Forest member of the -'L'ri&ss:i,C.

Chinle fomation

in

·a radius o£- about l2 ':miles

~-Carn:et'Cri

{.fig,.

l.) ..

1iost

of

the san;ples tested we:re taken tram altered.

clastic

~5

'With-in

th(l::

tvc~

unit.

~-ne

samples were also

co11~ted.

.from.

'Ullalt~red

··

material. at various

distar1ces

bel!JV:

and

later~ aM'~

from

th~

altered

zones~

1<1ost of the

s,ampli.ng

was done :in

the

B.uskon No.

1 nd.ne.,

ether

samples

w-ere taken. from

Ruskon

mines

NCHih

2, 6,

and.

7 and

fi"'m

a few

small

knolla of e.ltered ChiiU.e

!o~tion~

. Sr:-.t:j

j:.:cc:!:~n (~(::J!it:::\ ~if:tS

(4)

-2-Ntlst of the·

fo~tione ·~sed

in the .Cameron area are Permian

and

T-riassic

ill

age~

The

f'..tdba.b

l.i:me:Jtone is

P~rmian

.in

age~

and

i.s

overlain

by

the

lbenkopi,.

Chinl.e_.

and

Wi.nga.te tol'ma.tions

ot

Tri..essie

age.. The beds

dip

northeast toward the ·:Black Mesa

Basin,.

:the first

.importa."lt occurrence·

ot

ur&nit.Utt in the

~ron

area

.was

discov$1"~

· by

a l>Iavajo Indian,

Char

lee

Hu.skou~

in

the

~l;r

part:

or

~952..

Most

of ·the v.ranium deposits near

cam~

is t'ound.

in

sa.ndy··Edlt7 zones in

the Petri.J'ied. Forest meml-er of the Chinle :toxmatio:n..

AU.

the uraniun

deposits of: ooonom.ie imports.noe oeeur

in

the J..ower

.pa.rr.

of

the

Petrl.!i~ad

.Fcrest

melf,.ber.

fue

aand.y

l!mdstone lenses

which

cont-ain laGst of the

nranium miner.al.iMtiorA are genera.llJ" interpreted as scour f:i

JJ

i

~'S

<:J£

Chir>J.e stream$. The proad

eha.llow

eeolU"S

&verage

about.

:75/J .feet

in

width

·and

40 .feet

·in·

depth, )ind

~

gener~Al.l;r

· elonga.t.ed

in

a

rtortn-east.Grly'

direeti011. .

The

urard~

ora is

us:ual.Ji

associated.

'With

.carbon

in,

the 10irer

parl3

'ot

tha scours whet'$ the· .

.t:Uling.

is

oomm.Only

altered

to

gi"a.yish-yello'~,.;_·

!he

-ore

bOdies

~ve

an

elliptical

shape

in .:plan

view

and in cross sectiOn $lop&

durin

gradual.ly

~-ard

t.be

center·. ·.

'l'he

largest uranium depoait now

lalO\!;"'ll

in

t.h~. ~

:ia

450 teet

J.oog

A-~d

.J.,.f10

t~et

wideQ. Copper

and

cobalt

rt:d.nerals

are

visible

ill

places

itt

the

lOi'lermost parts of the ndneralimed altered l!t<mes ..

l'he ore minerals

which

have been identified.

in

the

·deposits at

C~ron

ara: ura.ninite,

:meta.autlmit~,

nppeitejl

'Ul"anophane,

.and

.matatorbex-nite ..

Ot..lter Jrl:nerals -associated

nth

the

ore ;minerals ·.are:.

:quartz~.

ka,Qltna

gspsum, · calcite,··

J.im.«dt.$~

jarosite$ and. mcmtmorilloni.te.!.

· . 'tilE

DITIU&Ot!E

tEST

Y.ttOCEDUEE

.The test uslW.

W&S

a'·group

test

for

h.a.v.y

~tals

{copp$r#.·lea.d:t

·ana

zinc)

de\'~eJ.oped

by

~·

Hutt

{1.9.51) or

the U..

s.;

Geological:

S'Urv'ey... .Ditl:dtone

d.iar$Olved

in

carbon 'tetr&ehl.onde is t.he organic .reagent used ..for t.ha

color-"..1.l'tl:etric test.

'lne

test.

.is

net equall.y' -eensitiv.e for each

.of

the

thr$e

me-1-'....aJ.s., It .is onl:r hill

as.

sensitive !or -copper as

.it

i.s

for

~itl.Cjl

and.

.only

one-fourth as eensitive for

l.aad

as

:it

is i'or

:s;tinc,.

:'.l't.te

con-centrations of

hea.vy

meta.l~

mentioned in this paper,

in

ppm,...p

are zinc

-eq>J.ivalents ..

(5)

Files

Ss.m.ples liere

crush~

¥.tit.h

·a

buekboaro and

lWJt!lllel~..

'!'he

eru.ahi$d

s~l:e

was digest.ed in

dll~e nitric

acid

in

a test tube

which

was

hea.te..:t

in

a water bath; the .efficiency o£ this digestio-a

aystel!l.

.is not

known

for

the type of samplGs collected.. The

&lwunt

of

heavy

l!l.etals presant was

.determined

by

noting the color reaction of the ditl'>.izone with an

aliquOt of. the

digestion solution ...

'l'he samples col.L$cted :were put

in

3 ir.ch

by

5 .inch

kraft

pa.per

envelopes..

The

spacing ·and t.;;",Pe

ot

sampling

varied~

·usual.ly

according

to the ura;rz.i.um

.tdn~~ation

p:riii}Sent or antieipa.ted .. ·

~oot

.of

the

samples collected

6'il.o'.ng

the walls of the pit of

th~

Hu.skon

llo ..

l.:nd.ue

\tere channel samples covering intervals

c£

ti-1'0 teet~

but I'Jome cl:.t.&mel.

samples were

tL'l(en

at one

foot

inter1ra.1s..

In

altered

f4""ew:J_, ·

eamples

ltrera usually collected ju.st @$le

th.~

alteration contacts

5 .t'eet

:abo~tf@

the contact

5

12 .feet above the contact; and

5 feet below the contact ..

Some samples were collected at greater .intervals both above .and bel.ov.-,r

the a.lterat:ton contact... The

spa.c:ing

between sampling

looalities

increased

aw~

.from.

the eenter of the deposits ..

!~ost

of the sa.t<'lples were taken

fl"'01

u.nweathered or

modera~ly

weathered

Ch.L"ll.e

1P.aterial.s

by

removing the

s~veral

inches

o!

caliche a..r.td weathered

w.aterial

with

&

geol.ogic pick

then cl.rippirli!

a.

sample

:f~

the solid

S6r.iimenta.ey

rock.

~1s

'W"'d

slc>w

11

so a nt11!!.ber

o:f

samples o:r s:urfe.ce

ma.terial

were also

ooll~ted

fQr

ccstpar.:iaon

with

~.,).les

o.r "tmWea.theJ:"ed

mate~-al

W::.en.

~t

the same

pla.ce~,

t.c:F see: whether the surface

~es

woul.d

reflect

.hea1ty

metal. content

or

the under.lyi.ng bOO.roek..

me

time·

necessary to

colle-ct a

.suri"a.Qe sample was

about one-tenth

.that

:re~d

to

get a relatively

unweathered

~e.

·

· The

trial

r¢SUlts

did.

not ind.iea.te a

t;tB:avy

I~

corr&ation; which .

wouJ..d

justify substitution

of

the easier surface

.method

of

se.l'llpl :lng for

the relatively .solid

reck amt-eria.l..,

Heavy

l?letals

tests were made on barren_. llti.nerilized, and ore-bearing

alteroo. Chirt..le materials.. Some samples collected. inJa.te

1955

in

a

vertical aection

aleng

th.e

north

will of

a

pit

at

H~on

mine

!io.

1 {fig..

2)

Wl!,."re

tested tor

heavy

metals and. a..lso for ura.niuw. content

by

radiometric and chemical methods.. The

Belll.Ples

were

:sa.."ld;r .and silty

and contained much jarosite and c&rbon.

'lie

ffi);.nd.y

and

silty mnes were

predomin&n'i~ly'

gra,.yish-yellow.. In tha ore-bearing

pa:tot

of:

the

sootion:<

the

heavy

metal content

'\'rtM

ge..'lera..U.y

ov~r

1.,000 l"YF•'ll• and .reached.

3,..0()0

(6)

.,

Files

-4-its

msrimum.

about

4 to.;

i'eet. above

the

floor of the pit... 'l"ne

h-eavy

· metal cont-ent rGmained at

~,000

ppm.

betlre$ll

6 to

10 .f-eet

aboVe t.he

pit

floor whereas the

UJOa

{chem:ical.)

eontent decreased .,trQn

ore to

highly miner-alized

grade~

and increased. again

to

slightly

above . ore

grade in the tenth f'oot.

-~

l.O to

J.2 i'eet above the fJ.oo.r

o:r

the

pit the heavy metal eontent was -about 500 ppm ..

with

about.

0.05 percent

LjOg

{radiom.e-trie)

present..

'i"lrelve

£$et or .more above the floor

ot

tha pit the

heavy

metal.

eontmt

ranged

:!ran

l35

to

~75

ppm..

and

th~

radiometric

t.3Dg

content -was

abo~

0,.01

'to

0 .. 02

percent,

'Wiri.ch is ·

detectable

with

a. Geiger .counter ...

/>.

co-:;nparison of the radiometric

~d

chemical a:l:'lal,.vses for

'U!"a.niu.m

in

the section·

(fig.

2) ahO'Iffl that the uranium

i.s

not

1.n

equilibrium,

~

particular

.ly

in the

.lowest part

~ere

the

chemical

ana.lyses.

show

about

50 to

100 percent more

u~os

present

than is indicated .from the

radio-metric

testst although· chemical tests were not made on

all

sa.mples,.

The urar..ium. content

ganerall.,y

incre.as-~s d~'!lW'a.rd

in

the section!' the

· heavy

metsls concentration ·reaches a

~um

·4

to

5 feet above the base_,

and.

d.ecrea.ses

belO\f

that.

poin-t.

l'he lowe:rm.<Jst sample

.in

the seetio:r);

was several imhes abo.ve the contact of the alter!:d With thE: unaltered

Chi.."lla,

and

results

there.for~

do not show

whether

or not

there

may

be

a.nother :i..'1Crease

in.

heav;r

~eta

1

~ ~ediatel.y

above

the una.J.tered Chinl.e.

~

_ -w

"::.:;.c:-•~" ... ~ ~.-<

Samples t&ken £rom the

surl'aee

of the area. which

had

been stripped to

reach ora

in

Huskon mne tio. 2 were mostly bla..nk,

but

one sample had

100 ppil.

heavy metals.. &wples ·collected

in

the same

prox:i.mity

.to

ere

in the lfus.kon lrd.ne

J'k...

.l.

would

_probably

have .

sho"rtll

a

high

heavy

$!leta]. ·

cont~t.

Se.mples

taken

d.~ard

tram

the

top

-o~

·the

altered zone

in

Eusk:on No..

7 mine show an. increase from

·o

to

Z"/5

ppm.

.hea:vy

met.a.ls .

.in

· a vertieal distance of .16 . .feet

•and

would

probab~

~ve

shown

a~kad

.increase

if'

continued· t'urther:.:'d.Oi1i:tliiard .:in a.raas

~oC ~n.nt

-ore .... ·

· ·'

Tests n!ade

by

J. E. Mck of t..lte U.

s.

Geological

~y}·

o.ri

some of

the .samples collected

at~

the .Hm,;kon

No ..

llrlna,

tmOl'f

t.he .:tollOW"ing

result~u

Zinc

·~leNt:?_-:.

Ph

uu

Zn

Co

·. Eaui.Vilent

{Wn)

(~}

(ppm)

'(ppm)

(px;m)

l l

l..,?OO

.20

20 1_,600

M-5

l.2

J.,700

900

20

700 $95

13

1.00

20

350 . 85

20 l,500

lJ,OO

60

700 J.;165

21 so

10.,000

90

700 5~~60

22

450

350

140

50 :360

(7)

Files

_-5-

January

4, 1957

The table

shO'dS

that

lead

is the

J)l'~1linant

heav:.v metal e1-:cept

in .

tho

case of sample No.., 21 which had a

hi&~ eepp~l:~

content. &mple

l~o

...

21. was taken in altered

mat~rial

:i.nlm.ediately

ahov~

the contact with

m:~

alt~r&J.

Chinle<> S:unl:l:les No. ll. E.n.d Ixo .. 12 l'<et<<a

taken

near

the

floor

or

the

pit.

&unple

No ..

12 was collected

j:u.st

e.lilove the .tloor or the

pit

a,.qd

shows a

higher copper content than No., ll..

Zinc

~oes

not

a.pp$aJ.~

to be

present in

.important

quantities in

1iJ:fJY

of the .sam.pleii'"

The lead _-content is generally

.hl..g.~er

tha:n

copper"' The ·cobalt

content ·

is

high

and

ranges from

50 to

1,600 pp:ll..

'1i1e

pres~r.~Ce ~r

cobalt

may

be related to the

tu'a!' .•

i:um. nd:ner4d 1

tzation~r

but

not enough· tests we:-e

.made to

veri...~

tlrl.s.

The six Sal'nplea in the preceding table i.'lere

taken

either in or

near

ore,.

P..inckley (2} had spectro&,'l'a.phio

.a:nalyses

made on 25 samples from.

two

deposits, which shovr that the elements most closely related to Ol"e were

manganese, mol.J'bd.enum.,

1-::ad.,

copper,

s:ad

va.nad.i:u.m..

..i'lw

:hea:vy

)l}:etala

tests on samnles collected from lluskcr.n

1 mine also .show a .w..arked

increase

in

heavy metals (mostly

lead and copper) toward

.··and

in

.ore,..

A

section.

(.fig.

3)

11ear·

hcle 1-16 on the

lfest

side of

·the

pit in

the

Huskon

l~o.

l l!'Jxie shot-fa the lithology and the hes,vy

metal.~ cone~n:trations

i'our-.d... Channel

s.ample~

1rr·ere

taken

representing each

2 teet verticall.'l•

The

lotrer 4

feet

of

the

section sltows

a

marked increase in heavy metal

content.. Carbon is present in

tJ:!..in

layers

abu."ldan.tJ..y-

distri:but.E..'ii

tr..rc;~ug.,hout

the section. At lS to 20 feet aoove the .:Uoor

o:t

the- pit

thl'l1

heavy metal·

conter.~.t

.increases -to 375

ppm. ..

in

a

sandy

~!Xle..

· In

another.

sandy zon-e at

23 to

.30

feet a.-t.Jove the pit

floor

the

htta.vy

metal. content

increases to

.ahti!ut

250 to

315 ppm..

'!'he .lowemast

.pa..-t

of .tlle sectfuon

probably contain.s

~ani:um.

ore

and tb.e

t'i:ff}

higher

zorte&

~1:'-vh

more

'than

a:verage h$avy metal content .al.so may have .he.e...--r .mine:.ra.lized. '\'."ith

:,ura..'1.ium ..

The

.higher

.Content

o:t

h~AT.f .metal~

in

·the

~o-#fet' i'e-~

.f-eet.

or

t.he-~tion

"WJ!J.7

b-a due to

etL.-ichment by

d~end:lng

$Ol.uti®a

which

met

the l.esa

nemeab~e

unaltered Chir..le beneath the deoosi.t"

• . . w

In

a.ltered but

b~ Chinle:~>

the heavy ll:l.etal

eoot.ent

is

.:usua.l:cy-

about

~50

·ppm...

or

less,

and

not ov.er 200 ppzn... The

~eralized. alt~

areas

a.ra slightly lighter

in

eolor

tltan

the

mineralized zones.

~le:5.

W$!'1!1

collected from the altere-d

or

lighter eolo:t"ed Chinle

-of.

several. isolated.

knolls between Huskon No..

.l

mine

a.l'ld

ftt'..akt.'ln

l4o,.

6 ll.rl.ne.. ··The

'3amples

were usually

blank

except in cases.

vher.a

·f~bundant

carbon was present

(8)

Files

-6-Th~

aar,;tpl.es

described

in

the sections

:illu.Btrated

in

~igure

2 and.

i'igu.ro 3

vera taken

fl"'m

.fresh cuts

in

stripped ar{!;a..fh

Other

$Smples ·

1iere taken &'ifaY

.f~ th;;t~

pit

in

areas

tha.t-.h&d.

not

be~

stripped ..

Samples

li"~re

collected along the· -a.lterati.on -contact. at. inareasin.[J.y

·greater dist.&nee$

.fl"'l.U

the

area

.or

highest :minera.lieation. Sampl.es

'brera cGUeeted ti'l.Ost. cormnonly about

5 fe~t

below' til$

alteration

co,."'l-tacts

just

abatre the

alt~ration

.contact.,

and

5 te

1 :teet

-an::i

10 to

l l .te-et or

more

•above the .alte.ra:ti®

contact.

'Xest l'$Sul.ts show

tb&t

the $:Blil.pl.e.s eollooted just above the contact

·and

in

the

·.interval

ab<m.t

l2

f'-aet above:

thtii

eontaet.

~re

the

most

eignifi.eant .ones tc :i.ndica.te

ura."'liu::a ·

nrl.n;a~a:lization. ~les

collected below

th$

al.terati(m

con-tact

in

m.i.n~:.ra:J...Uoo

area.s were us'ttally

~of

11eav.v·metals -Qr had

~· ~e-

..

t

heavy

metal -content..

~ing

of the

m.lal.tered.

~hinle

·.fQr

dith:izona tests

wotU.d

the:M.lfore

b~

of little value J:or l.oca.ti.ng

ttranium. ...

!n the al.tered

2>0!W#I

sampl.e& were taken

b7

dig&ing

t~

'the .loose

weathered

ma:terial

on the surface

wtll

solid

l.e.ss~thered

material

w-as reached.. As pr.eviousl,;r menti<med,.

some .

.s~les

irrere

also tai:..en

from. tl-..e surface to see

it

the

t!l.Ol:."$

rapid surt'aeE! :santpllng woulA he of

a.n;~r

v..U.ue • .

Som.e 5u.rfa.ce

~les

showed

50 to

l.OO

.ppm ...

he&V'J

~tus,

but tnOs:t,

had

none

11

wen thaugb

they

WI!:~~

·.co-llected

.fJ)Ve,r-

aJ.t:ered material

w.hicn

hati from

l~'SOO

t¢l

3~000

ppm •

. Zones .ec.mtaining

m."amt:lll ore and.

s.u.h-ort~

i.n

WIS

Petrified Forest

m~.r

.<Jf

.the Chinle formation have

·a.

~uch ~ter

heavy

metal..·content-i:.ha;,

altered hut barre.n parts

cOf

the i'oxmatio.n.

Ore -.cow...ains.

:a:ppro.x:imately ·

~0

or mQre

tim.~C;S

.,as

.much

h$&\ey"

lldnerllls

a.s

J:!arrei:t

beds ..

t:.~oua

&m~J!WJ.t:e

or r.eavymeta:ls do

.~ate w:ar~~rall~tiens;:...?.t.:·l.ea.st

in

the Ruskon lio ..

·~

W:t.l$,..

--~

hea:QT

-metal-a

t-esta of

~s't&.ken ~11

other

-mines

s-ugg"st i:J:::.at

-there

\'lill·be a

·v~iat'io'ri

in t:"1&

~r.l\'11

amGlmt

.o.f heavy-

m.eta.l.s

tounli

in d.i.ti'itrtmt

neposl:ts

in

tb$

-~ ~~

...

In

deP'lsite of -the

·ntrif~ 1'~ ~r \'fh~

the

hMvy

Ill(ltal..

eQntent

a.pp~ars

to

~ a~al.

times

high$!'

tl.uut

hMkgrcnmd, ·

b.ea.V-I!et&l-s

t~sts

on

drl1l

cuttings

~t

be

a.

-uaeful. guide .as sttpporting -tn:idence

1.n

!-'>rOS~cting

f.or an ere

body..

An~l.i&

&lllOunts of heavy

·aeta:Ls

:i'w.;nd.

in.

fr~

UJJ.W'.fitathered. cut.o.rop s.ampl.es

p:robabzy

indicate

that.

·ura.T1ium is

pr~'tnt,

and

tha.t

more detailed amnplli..g or cploratien

shodd

be done ..

It

-n~uld

be of moat value

to

confine

the .g.ooeh@lllic.al.

~pllng

t.Q

t.he

'l.t:rsrer

15 <tr

25 f-eet

·or

the altered

c~

•.

Distribution:

E. R. Gordon (l)

Library ( 2)

Geologic Branch (l)

E. A. Youngberg (l)

Attachments:

Figures

(3)

Tables (2)

D. L. Everhart (l)

R. D. Nininger (l)

District Geologist, Dist. IV

Flagstaff field station

(9)

/

-7

G'!'eJo..:gs C ..

Q,.

and Moore ..

£.

L • .,

1955.,

Reoonnaissw:-1.c.e o£

the

Chinle

:formation

in

·the Camer-on-st .. Jo.J;zn.s area$ Coconi.no,. liavajo

3

and

Apache Co:unties,

Arizor~:

u.

S,. Atomic Er;,e:r·e;::r

CO!llm.-p

F¥.;i-5J..,.

I{i:nckley

11

D ..

I~~s .1955~

Reco:nnaissanc;:e of the Came.roa a:rea

5

Coconirro

County~

Arizona; U.

s..

Atomic

E~lergy

COi:!!m.,

·1~,.

tl.uf:f;f

1 ..

c ...

1951.,

A

seusitiv~

.field

test

!:or d<ittooting

heavy

metals

· in

soil or

sed.ilnent~

Eeon.o-:nic t!eol .. , vol ..

46,

no.

5o

p ..

524-540.,

(10)

Files

APPUCATIQN OF

.'J.'RE

l!IT1UZONE

EEAVY-~.ALS

l'ESt

TO UP.ANID!l DEPOSITS OP

~

CHDitl£

FJRW\.T.IOl~

Abstract.. .. ..

·* ... • · ... .. .. ..

~

.. ... • .. .. ... ... ... • • .. .. . ... • • ...

~

Introduction. .. · . ., .. .. .,. .., ... ..,. • • ... .. • • .. . ... ... .., . ... ... ,.. .. .. ..

~

stratigraphy and .uranium deposits .. .. .. • .. • .,., .. .. ... .,. ... .. ,..

2 ·Mil'teral.og._v... .. . ·..

:~

• • . .... ., .. • .. ... • .. .., .. ... .. ).. .. ... .. .. • .. .. · 2

The dithizone test

pl"'C~

... ..., .• ...

4 ...

2 Sa.lnpling tech."lique ... "' ... ··• ... "" • .. .. .. .. .. ..

3 ·Results of heav:;r metals. tests ... .. ., "' .. .. ., .. .. .,. " " ., .. ... ..

3 Concl.usio:na ... ... .. .. .. • .. " .. ,.,. .. .. • • ... .. .. .. .. .. .. .. ... .. ..

6

Ref~renci9s.

.. .. .. .. • ... .. ,. .. ... • • ... "' "' ... • • ., ... ..

Q . . . . . .

.7

}'igure

J..,

Index map, Gameron area,

eoeenino

eount.y

~ AF~a

...

2. P111

h~avy

metals and percent

U..30~

.in

··.section. along north

wall

of

pit

in.

.liv.s:lron li.ine

.No •.

l,

<C~ron,

Ar:Uona... ·

· ,3.

Secti-on

in

pit of

Jlu.skon

11ine .No ... l.i!S.howing.llthology

.and

Pfi'l.:waa"'.r.;r

lnetals,.

Ca.nteron, .Arisena.

·

·- . . . -

.

Table l -

Identification

a..l'ld.

resJJlts

:Of

·testa~

·aamp].es

l f.m:.ough :31;

Petrified

.i"or:est cmelr..ber of

the·

Chirile

l"onmtion~ C~n

area, Arizona..

·

T~le

2 - Identifica.ti®

fmd·

.r~ts

o:t.

t~st,s$

.

emnpl~s

· ..32 -through

.221

$1

Petrl.fied

F.orest member o:t the Chir.tl.e .tomat.:t<m,

(11)

*

H uskon No.6

• Huskon No.2

filA

Husko No. I

::0 ::0 <!>()

rnrn

•Huskon No.7

Fi.Qure I. lnd,ex Map

A ri I 1956

Cameron area, Coconino

County, Arizona

T 28 N

T27 N

(12)

15 0 0 0 ::: 12 a.

-

0 II '-0 0

...

10

"'

> 0 ₉ .0 0 8

"'

lL 7 5 4 2 0 I

T

0 I o - - o - o - o - o I 0 .10 .20

Section 1 s near hoI e I -II 9

PPM Heavy Metals

- - - u

₃

o

_{8 ,} Chemical

T_l_,_,_,_,,

!'fO .50 1000 2000 3000 4000 5000 PPM Heavy Metals .60 6000 A ri I 1956 T M-92

Figure 2.-PPM Heavy metals and per cent

u

3 o

8 in section

along north wall of pit in Huskon Mine No. I, Cameron, Arizona

(13)

40~---,

....

0

"'

> 0 .0 c

"'

35

30

25

LL. 15 10 5

'

0

F1gure 3 Section showing

'" pit

of

Huskon

No.I

1000

Section in pit of Huskon Mine No. I near hole 1-16 showing Lithology and

PPM Heavy Metals LEGEND Sandstone Siltstone Mudstone Carbon

2000

PPM Heavy Metals ~

L:.:.:..:.J

3000

A ril 1956

lithology and PPM Heavy Metals

mine,

Cameron,

Arizona

4000

(14)

TAlliE I - IDENTIFICATION AND RESULTS OF TESTS, SAMPLES 1 THROUGH 31, PETRIFIED FOREST MEMBER OF CHINLE FORMATION, CAMEOON AREA, ARIZONA

Field Grand Heavy USGS

Spl. Junction Metals

11

Zinc ellJ08

u

₃

o

8

1ih

li2.!.._ ~b. No. Location DescriE:ion

_iE."E!!!L

_{...£2.l._} E<Juiv. (E!rcenq ~nt)

1 1 40,341 Huskon #1, 25' N43W from hole 1-120 Mudstone, sU t;r, carbonaceous 600 l/4 0.05

11-12' above floor 2 2 40,342

-

_"

400 l/4 0.05 10-11' above floor

3

40,343

-

_"

1,000 1/4 0.09 0.11 9-10' above floor

4

40,344

-

_"

1,000 l/4 0.08 0.07 8-9' above floor

5

~ 40,345

-

_"

1,000 1/4 0.05 7-8' above floor 6 6 40,346

-

_"

6-7' above floor

"

n _1,000 _1/4 _0.14 _0.16 7 7 40,347

-

_"

..

_"

2,000 1/4 0.28 0.20 5-6' above floor 8 8 40,348

--

_"

3,000 1/4 0.09 4-5' above floor 9 9 40,349

-

n n n _1,600 _1/4 _0.26 _0.26 3-4' above floor 10 10 40,350

--

_"

n

"

1,200 1/4 0.12 0.15 2-3' above floor 11 11 40,276

-

_"

n

"

2,000 l/4 445 0.22 0.35 1-2' above floor 12 12 40,277

-

_"

n

-

_1/4 ₈₉₅ _0.23 _0.44 0-1' above floor

13

B-1 Huskon

#1,

70' N87W from hole 1-120

_"

175 l/4 85 0.02

0-3' above bench, 12-15' above floor

14 B-2

-

_"

n ₁₃₇ _1/2 _0.02

3-6' above bench, 15-181 _{above floor}

15 B-3

-

_"

n n ₁₃₇ _l/2 _0.01

6-9' above bench, 18-211 _{above floor}

16 B--1.

--

n

"

n 150 l/4 0.01

9-12' abon bench, 21-24' above floor

17 F-1 Huoken #1 approx. 75' E of hole 1-120 Sample belov fault 300 1/4 0.01

1 at edge of ore lens

18

F-2

SIUUI Fault material 300/- 1/4 0.01

19 1"-3 SIUUI Sample above fault 300f. 1/2 0.01

20 o-1 40,287 Huakon

#1,

eneefgot~~e£ov ~ees Altered material, imaediatel7 above unaltered l/4 1,165 1.05 0.7J

21 o-2 40,288 Ore samp:fe;' high-graded

-

1/4 5,160 Tr

22

D-3

40,289 One

fe&t

above ore

-

4001 l/4 360 0.03

23 H-1 40,278 Huaken #1, a11.111plea at 201 _intervals

-

450 1/4 0.01 on N bearing 24 H-2 40,279 SIUUI

_-

50 l/4 0.02 25 H-3 40,280 SU!O

_-

200 l/4 :~Til2 26

a....-

40,281 Same

_-

275 1/4 Tr 27 H-S 40,282 Same

_-

450/- l/4 0.01 28 H-6 40,283 Same

_-

4')of 1 0.04

29

H-7 40,284 SII.IM

_-

300 l/4 0.14 30 H-8 40,285 Samo

_-

250 l/4 0.01 31

H-9

40,286 Sme

_-

400 l/2 0.18

o.os

(15)

Field Spl. No. _~ 32 PW-1 33 JA-1 34 0-4 35 36 37 1-120 38 1-120 39 1-120 40 1-120 41 1-120 42 1-120 43 1-121 44 1-121 45 1-121 46 1-121 47 1-121 48 1-121 49 l-22 50 1-22 51 1-22 52 1-22 53 l-12-A 54 l-12-A 55 l-12-A 56 l-12-A 57 1-12-A 58 1-12-B 59 1-12-B 60 1-12-B 61 l-16-A 62 l-16-A 63 1-16-A 64 1-16-A 65 l-16-B 66 l-16-B 67 l-16-B 68 l-16-B 69 l-16-~ 70 l-16-C 71 l-16~ 72 1-16~~ 73 l-16-C 74 l-16~ 75 l-16-D 76 l-16-D 77 l-16-J 78 l-16-D 79 l-16-J

eciY

~:nob 1-A#l

ll

A;: arbitrary

~I See :ast r.a.ge

Sa:::;:le.s 8G-S; :.::~..,., ... "] o,:::

TABLE II - IDENTIFICATION AND RESULTS OF BSTS,

SANPLES 32 THROUGH 221, PETRIFIED FOREST ML"!BER OF CHINLE FORJ.<.A.TION, C::AHERON AREA, ARIZONA

(No record) (No record)

Location

Huskon #1, 251 _{N 43}_W_from

hole l-120; 6 samples (37-42) at 2' intervals along pit face

Huskon #1, nr hole l-121 0-2' above floor 2-41 _{above floor} 4-6• above floor 6-8' above floor 8-10' above floor 10-121 _{above floor} 0-2' above floor 2-41 _{above floor} 4-6• above floor 6-8' above floor 0-2' above floor 2-4' above floor 4-6' above floor 6-8' above floor 8-10' above floor 0-2' above floor 2-41 _{above floor} 4-61 _{above floor} 0-2' above floor 2-4' above floor 4-6• above floor 6-8' above floor 0-2' above floor 2-4' above floor 4-61 _{above floor} 6-7' above floor 0-2' above bench 2-4' above bench 4-61 _{above bench} 6-8• above bench 8-10' above bench 10-12' above bench 2-41 _{above bench} 4-61 _above"bench 6-8' above bench 8-101 _{above bench} 10-121_{above bench}

Off top of knob

Description?}

~ footnote 2 fqr exrl~~ation of abbreviation)

Ss, Gy-yw; V a st md cbn jar

Ss, Gy-yw; V sty; Shy; V a cbn; A jar; S lim

Ss; Gy-yw; V shy; Sty; S-a cbn; A jar; S lim; Ortho

Ss; Gy-yw; V shy; Sty; S cbn; S-a jar; S lim; Sp ortho

Ss; Yw-gy; V shy; Sty; S cbn lim; Sp jar ortho

Ss; Yw-gy; S gy-:r,;; V shy; Sty; S-a cbn; S jar ortho

Ms; Gy-yw; Sdy;"S cbn jar o~tho;· Sp-s lim

Ss; Gy-:~-rw; V shy; Sty; A cbn jar; Sp lim

Ss; Gy-:r«; V shy; Sty; A cbn jar; S)O lim; S ortho

Ss; Gy-yw; V shy sty; A cbn t~; V a jar; S lim ortho

Ms; Gy-~rw; Sdy; A cbn j~r; S lim; S~ ortho Hs; Gy-yw; Sdy; A cbn ,5ar lim; Sp ortho

Hs; Yw-gy; Sdy; A cbn lim; 5!' jar; S ortho

Ss; Gy-yw; U :,r-n-or; V s:-::-t; Sty; A ::bn lirrq S jar; Sp ortho Ss; Gy-yw; Sty; Shy; S cbn lim ortho; S-a jar

Ss; Yw-gy; Sty; Shy; S cion jar; Sp-s lim; S-a ortho Sts; Gy-:rw; il sdy; Shy; S-a cbn; A jar; S lim ortho

Sts; Yw-gy; Sdy; Shy; S cbn ja~ ortho; A lim

Sts; ·Yw-&Y; Sdy; V a cbn; S~ ja~ o~tho; Slim

Sts; Gy-yw; Sdy; Shy; A cbn; S jar lim; Sp ortho

Sts; Yw-gy; Slgt sdy; s:,y; A cbn jar

Sts; Gy-:r,; sty sdy; Yw-gy sty; S ms lin:; A cbn; S-a jar

Sts; Yw-g;..{; Shy; Sp-s cbn; Lim along frac.; hard massive Sts; Yw-gy; Shy; S-a cbn; Lim along frac; hard massive

Sts; Yw-gy; Shy; S-a cbn; A lim; S hard massive

Sts; Gy-yw; V sdy; Shy; Sp-s cbn; S ja~ lim; ortho

~~s; Gy-:,rw; S yw-gy; Sdy - v siy; Sp-s cbn; S jar lim;

A ortho m J:i-': ms

Sts; Gy-y.;, yw-gy; V sdy; S1gt shy; Sj: cbn; S jar; A lim

Sts; Yw-gy; S cbn; A lim; hard massive

Sts; "f-.,;-gy; A cbn lim; harj r::assive

Sts; YY..·-gy; .:3-a -::bn; A. li::-:; hard

Sts; 'I a d yw-or lim; A gy-y.; jar; V sdy-sd;r; S cbn

~s; Yw-gy, s gy-yw; Sty; Slgt sdy; Sp cbn; A jar; Sp-s lim

Ss; L br; V cgl; S Heavy 'Oy' Heta:).s v 3 ~ 0 f; 0

_;

0? t, 1400 _~ 1400

J

1200

1

l2CC

1

1300

..

1200 J

"

2600 1; 12CO _f; 800

i

800 _;. 800

t

800

_t

350 f; 1200 1

1

350 4 350 l 4 2200

};

1200 t; 1200 1 4 250 1

l

600

"

3200 f; 2200

*

350

_"

_t 1200 f; 3200 f; 800 _~ 350

..

2200

_;

6GC: _~ 200

_;

150 ~ -50 t; 150 4 150 4 200 1 ₄ 375 -50 -50 -50 375

to a maxi!i:W'7: of 10, ~.;as ir:"~icatt: r0,2cti0n -...i.th di.lut;;; HK03 as a measure of relative

co

3 c'J!itent .::; from clairr. :ncu~t;er ff =; i-:usr:c;:

el.

(16)

~ 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 107 108 109 110 111 112 113

114

115 116

117

118 119 120 121 122 123 124 125 126 127 Field Spl. ~ Knob l-A#2 3 4 CPS ll lA lB lC lD 2A 2B 2C 3A 38 3C 3D 3E 3F 3G 1-182 1-190 #1 2 3 1-188 til 2 3 l-200 #l 2 3 1-196 #l lA 2 2A 3 3A l-170 1 lA 2 2A 3 3A 4 4A 1-174 l lA 2 2A 3 3A

TABLE II - IDE?,l'IFIGATIO?l AND RESULTS OF TESTS,

SAMPLES 32 THROUGH 221, PE'TRIFIED FOREST HE!'.BER OF GHitlLE FORl'.ATION, CAHERON AREA, ARIZONA

Location

In altered ms.

3'

below top

Unaltered below alteration contact Unaltered about 5' below contact

31 _{below alteration contact}

2' abov8 alteration contact 17.5' above alteration contact 17?' above alteration contact

3-41 _{below alteration contact}

2-3' above alteration contact

121 _{above alteration contact}

20' below alteration contact 15' below alteration contact

Near alteration contact

In vicinity of #3£ but about a foot below surface

In unaltered Chinle

41 _belowalteratio~.contact

2' above alteration contact

5' below ateration contact At alteration contact 5' above alteration contact

At contact

5' above alteration contact -5' below alteration contact -5' belvw alteration contact Near contact (below) Near contact (below)

-51 _{above alteration contact}

S ,sil:Je' of ridge; .S ;20cii:·or ·1-170 15' .. below,·alteratio:ll.·.contact 15' below alteration contact 5' below alteration contact 5' below alteration contact Near alteration contact Near alteraiion contact

S side of ridge; S 20 W of 1~174

15' below alteration contact 15' below alteration contact 5' below alteration contact

Near alteration contact Near alteration contact

Description

(See footnote 2 for exolanation of abbreviation)

Hs; L gy; Sp cbn

~:s; Hg:y; Sp lim along frac ¥.s;

l·'

l gy

Hs; M g:{

Hs; }~ 1 gy; S sdy; Sp cbn; 3 lim in ss

Sts; Yw-gy; Shy; Sdy; Sp cbn lim; A jar

Sts; Pl T~-or, H r-br; Shy; Sdy; Sp cbn; S lim; Va jar

Hs; N gy

Ms; M 1 gy; Sdy; Sty; Sp cbn lim

Sts; L br, V l gy; Sdy; Shy; S cbn jar; V a lim

~!s; Gy-r; V sty

Ms; M gy w s l gy; Sty

Ms; M-m 1 gy; Slgt sty; S slicks

Ms; M gy; Slgt sty; Sp lim

Ms; M gy; slicks

Sts; Yw-gy; Sdy; Shy; S lim; V sp jar

Ms; H 1 gy; Sty; V slgt sdy; S lim; H r min along frac Ms; Gy-r; Sty

Sts; Gy-r w yw-gy; V shy Ms; Gy-yw; Sp cbn; Sp-s lim

Sts; L br; S gy-or; Sdy; V a lim cbn Ms; Gy-r; V sty

Hs; Yw-gy; Sty

Sts; Gy-yw; Slgt sdy-shy; Sp cbn; S lim jar Hs; Gy-r; Sty

l'.s; Mot gy-r, d _yw-or; Sp cbn; A lim !J.s; Gy-yw; Slght sty; S jar on frac

Ms; Gy-r, yw-gy; Slght sty

Sts;_ Gy-r; Shy Hs; Gy-pp; Sty Sts; Pl r; Shy

Ms; Yw-&v; S lim; Sp cbn jar

Sts; Plr, m j~-or; Shy; Sdy; S lim; Sp jar

Ms; M gy; Sty

Ms; L gy; Sty Hs; M gy, Gy-r; V sty Ms; M 1 gy; Sty

Ms; Yw-gy; Slgt sty; S lim; Sp cbn Sts; Yw-gy; Shy

Sts· Yw-gy· Sdv· Shy· S lim cbn· Sp jar

Ms;' V sty;' Sd:;/ ~ peb~; S lim ' ·

Ms; Gy-r; Sty;'S slicks

_?.,fs; Gy-r; Sty

Ms; ~: gy; Slgt sty; Sp lim along frac; A slicks

Ms; M 1 gy; sty

l'.s; Pl br,

s

yw-gy; s'lim along frac;

s

slicks Hs; Yw-gy; Sty Heavy Metals ~ 0 0 0 0 0 0 0 900 300 0 50 0 0 0 0 0 0 366 0 2200 1066 600 250 250 650 3200 600 0 0 0 1360 350 300 0 0 0 0 0 0 0 0. 0 0 0 Q 1600 50

co

3

~

~ 4

1 t

~ ~ 4 t.

~

I

f;

i

~

!

_¥

cr. t..

t

r

t

_{. f;

f

t

f

(17)

~ 128

129

1.30 1.31 1.32 1.3.3 1.34 1.35 136 137 138 139

140

141

142

143

144

145

146

147

148

149

150 151 152 15.3 154 155 156 157 158 159

16o

161 162 163 164 165 166 167 168 Field Spl.

!i!l.t..--1-174 114

5

5A 6 6A 1-180 Ill BP-120 BP-121 lA 2 2A .3 .3A BP-1-16 1-121 BP-1-16 1-121 6-27.3 Ill ''2 3 4 5 BP-121 1· 2 3 1-164 Ill lA 2 2A 3 3A 4 4A CP2 #1 lA EH #1 2 3 H2 #1 ) 2 ) 3 ) 4 ) 5 ' ~

___

.-..,_

TABLE II - IDENTIFICATION AND RESULTS OF TESTS,

SAMPLES 32 THROUGH 221, PErRIFIED FOREST MEMBER OF CHINLE FORMATION, CAMERON AREA1 ARIZONA

Location

S side of ridge; S 20 W of 1-174 1' above sample #3

5'

above alteration contact 51 _{above alteration contact}

10' above alteration contact 10' above alteration contact S side of ridge; S 20 W of 1-180 In R Ms In ::R Ms Near alteration Near alteration In altered.mudstone In altered mudstone

Huskon Ill, 10' from base pf pit wall near 1-120

10' from base p! pit wall near 1-121

#1, center of pit between 1-16 and 1-121

12,

center of pit between 1-1.6 and 1-121

Huskon #6, base of cut 6• above cut 12' above cut 23' above cut 4.3 t above cut Huskon #1, unaltered

Green material above contact Altered about 6-12n above contact 10.5' below alteration contact 10.5' below alteration contact 1.5' above alteration contact 1.5• above alterationccontact 7.5• above alteration contact 7.5' above alteration contact 15.5' above alteration contact 15.5' above alteration contact In altered zone at Corner Post #2

In altered zone at Corner Post #2 Last ridge E of Huskon Ill in Gy MB 10' below alteration contct. 1.5' above alteration contact 10-11' above alteration contact Huskon

12,

5 samples collected at

lOOt intervals along "channel" bearing N 80 E

Same Same

Description

(See footnote 2 !or e:x::planation of.abbreviation)

Ms; Yw-gy; Slght sty; S lim; Sp cbn; Hem? Sts; Yw-gy; V shy;

A

lim; S cbn

Sts; Yw-gy; Shy; Sdy; S lim jar; Sp cbn Yw-gy; Sdy; Shy; A lim cbn; S jar Sts; D

yw;

Shy; Sdy; S lim jar; Sp jar

Heavy Metals

lli!l!L

2000 500 0 0 0

Sts Gy-r; Shy; Sp lim cbn 1500

Sts Gy-r; Shy 0

Sts Gy-r mot w yw-gy; Shy; Slgt sdy; S lim slicks; Sp cbn 200 Sts Gy-r mot w yw-gy; Shy; Sdy 0

Ms; :tw-gy; Sty; Gy-yw min 1900

Ms; M gy, Tr pl r; Sty 150

Ms; M yw; Sty; Sdy; Sp lim cbn; V a jar; S ortho J.l.s; Gy-yw; Sdy; Sty; A cbn jar; S lim ortho mal; M r min

3200 1600 Sts; Yw-gy; Slgt shy; S cbn ortho; Sp lim; A jar

Ms; Gy-r

Ms;

H 1 gy; Slgt sty; S lim along frac; A slicks Sts; M 1 gy; Shy; S lim along frac

Ms;

L gy; Sty; S lim

Ms; M 1 gy, s d yw-o; V sty; Shy; A lim; S-a cbn Sts; Yw-gy; Slgt sdy; S lim ortho

Sts; M gy; V sdy; Shy; A ortho

Sts; Pl gn-yw, 1 gy; Sdy; Shy; S cbn; V a mal; A ortho Sts; V pl or, s d yw-or; Sdy; S lim ortho; V sp jar

Ms;

Gy-r, slgt mot w yw-gy; V sty Hs; Gy-r; Sty

Sts; D yw-or, s yw-gy; Sdy-v sdy; A lim cbn jar; S ortho Sts; Shy; S jar ortho

Sts; Yw-gy, m 1 gy; Slgt sdy; S cbn lim; Sp ortho Sts; Yw-gy, 1 gy; Shy

Sts; Br-gy, d yw-gy; Slgt shy; A lim; S cbn Sts; Yw-gy; Slgt shy; S lim

Sts; Yw-gy;

's

ortho Sts; Yw-gy; Shy 4500 4550 0 0 0 0 50 orange 200? Yellow 2400 0 0 900 0 0 0 3000

250

0 0 Ms;Mlgy 0

Hs; Yw~gy; Sty; Slgt sdy; S cbn; S c g 0 Ss; Yw-gy; Sty; S lim; A cbn ortho 0

Ms;

L gy; V sdy; Sty; F g, s v c g; S lim; A cbn ortho 0 Ss; Yw-gy; 'F-e g, s v c g; V sty; Shy; A lim ortho; S cbn liOO Ss; Yw-gy; V f-mg; Sty; Shy;' S cbn ortho; A jar 0 Ss; Yw-gy; Vf-fg; Sty; S ortho 0 Ss; Yw-gy; V!-cg; Slgt sty; Shy; S ortho 0

co

3

t

I

t

i

t.

t

;

~

t

4

I

_i

t

!

₁

t

f

t

(18)

fu2

169 170

171

172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202

203

204

TABLE I I - IDENTIFICATION AND RESULTS OF TESfS,

SAHPLES 32 THROUGH 221, PErRIFIED FOREST HEJ.:BER OF CHH;r.E FOR!I.ATION, CAMERON AREA, ARIZONA

Field Spl. ~ H2 #6 6A 7

?A

8 8A 9 9A 10 lOA ll llA l·:P470 #l lA 2 2A 3 4 5 l·P47l-Al 2 3 4 Location

Huskon #2, 0.15 mi. N, in altered zone above contact.

0.15 mi. N, in altered zone above

contact,

O.l5!.Jid."'ll,

in altered zone above

contact, in Gy Ms about 5' below

alteration contact.

0.15 mi. N, in altered zone above

contact, in Gy Hs about 51 _below

alteration contact.

0.5 mi. N., lighter Ms at top of knob

Same

Same. Gy Hs about

3'

below base of lighter (altered?) Hs

Same. "

0.15 mi. N 60 W of sample H2-9

Same.

Altered

Hs

about

C.?

rni

N 65 W

from uorner Post

5,

Huskon #1

Same

3'

below alteration contact

Same l' above alteration contact

1' ,, " 11 6t It H 11 12' 181 l'

6•

12' 181 II tt II II

"

1t 1t 1t 1t 1t II II 1t

"

1t HP47l-Bl l' lA 1 t :2 5' 1'

6•

1t II tt tt tt 1t tt

"

tt n tt 1t tt n II tt II

"

II HP472-Al 2 3 4 ~P472-Bl 2 3 4 !1P472~1 2 12' 18' Near (above) 6• tt 12' 251 1t 1t Near (above) 6• 1t

"

tt 1t

"

II tt II II

"

_tt

"

n 1t 1t Description

~See footnote 2 for exolanation of abbreviation) Ss; H l g:; 'lf-fg; Sty; S lim; A cbn; Sp jar; Sp-s ortho Ss; Hl gy; Sty; Shy; S lim

gs; H l gy; Sty; S lim; Slicks

Ss; L br-gy; V f-fg; Sty

Hs;

L

o-gy; Slgt sty; S lim along frac;

A

slick

!-1s; L gy; .Sty; Sdy

Ns; M l gy Sty; S-a lim

Ss; H l gy Sty; Shy

Sts; Yw-gy Sdy; A lim cbn

Ss; Yw-gy; Sty;

A

lim; Sp cbn jar

Sts; Dsk yw; Sdy; V a lim; Sp cbn

Sts; Dsk; Sdy; A lim

b; 3r-gy; Sp lim

Hs; L gy; Sty; Sdy

Hs; H l gy-<n gy; Lim along frac Hs; L gy; Sty; Sdy; S lim

Ls; L o-gy; V fg; V sty; S lim cbn ortho

Sts; H 1 gy; V f g; Sdy; S-a lim; A cbn

Ss; Yw-gy; V f-fg; So p; Sty

Ss; Yw-gy; V f-fg; V sty; S lim

Mp; L gy; Sty

Ms; Yw-gy; V sty; S lim;'Sp cbn

Ms; Yw-gy; V sty

Ss; L gy; V f - rng; Sty

Sts; V l gy; Sdy

Ss; V 1 gy; Sty; Shy; A ortho

Ms; L gy, s d yw-or; Sdy; Sty; A lim cbn

Sts; L gy; Sdy; A lim

Hs; Yw-gy; V sty; A lim; S cbn

Hs; L gy; V sty; A lim; S cbn

Ms; M l gy; Sty; S lim; A cbn

Ms; L gy; S lim

Ms; Yw-gy; Sdy; Sty; Sp ortho

Sts; L gy; Sdy; Shy; A lim cbn; Sp jar Sts; L gy; A lim cbn

Sts; Yw-gy; Sty; Sdy; A lim; V a cbn; Sp ortho

Heavy Hetals ~

600

0 0 0 0 0 0 0 0 0 150 0 0 0 0 0 760 100 0 0 0 0 0 0 0 0 150 0 0 50 0 0 0 200 0

900

~., 003

t

f.

);

t

;

t

f

I

~

l

_t

!

9 l

;

~ ~ ~ ;. ~

j

);

(19)

TABLE II - IDENTIFICATION AND RESULTS OF TESTS,

SAMPLES 32 THROUGH 221, PETRIFIED FOREST MEHBER OF CHINLE FORMATION, CAM&ll,ON AREA, ARIZONA

Field Heavy

Spl. Descrintion Metals

co

₃

No. _~ Location (See footnote 2 for exEl~ation of abbreviation) _~ 205 v.F472-C3 121 _{above alteration contact} _{Ss; Yw-gy; Sty;}_{V a lim; Sp jar} ₀ ₁

206 4 251 II II II _{Ns; Yw-gy; Sty; A lim along frac} ₀ 1

207 5 37' II II II _~~s;_{L o-gy; Sty; S lim along frac; S slicks} ₀

t

208 6 53' II II II _{Ss; Gn-&v; Sty; S ortho}

so

₁₀

209 HP472-Dl 4' below contact with Gy ~~ Mli; L gy; Sty; S lim; Sp cbn. 0 };

210 2 below contact Mli; ~~ 1 gy, s yw-or; S lim cbn 100

!

211 3 in middle of Gy Ms Hs; M gy; Sty; S lim 0

212 5 2' above contact with RMs Hs; M 1 gy; Sty; A lim cbn 0 t 213 6 L'1 Rl-!s 21 _{below Gys-Yw Ms} _{Ms; Gy-pp; Slgt sty; Sp-s lim} ₀ 1

~

214 H7 #1 Huskon #7, 0-21 _{below top altered zone Ss;}_~ls;_{M yw, &v-pp; Sty;}_{V a lim; S ortho} ₀

f

215 2 2-4' II II II _{Ms; Gy-pp, s yw-gy; S lim along frac; S slicks} ₀

216 3 4-6' II II II _{MS; L gy; S sdy; Sty; S lim along frac; S slicks} ₀

t;

217 4 6-8• II II II _{Ms; L gy, gy-pp; Sp pty; A slicks} ₀

!

218 5 8-101 II If II _{Ms; Gy-pp, yw-gy; S lim along frac; S slicks} ₅₀ 219 6 10-121 If If If _~$;_{Yw-gy, s gy-r; Slgt sdy;}

s

_lim ₁₅₀ l

220 7 12-141 tl If If _{Sts; V 1 gy; Sdy; S ortho} ₂₀₀