mining records curator arizona geological survey tucson,...

The following file is part of the

James Doyle Sell Mining Collection

ACCESS STATEMENT

These digitized collections are accessible for purposes of education and research. We have indicated what we know about copyright and rights of privacy, publicity, or trademark. Due to the nature of archival collections, we are not always able to identify this information. We are eager to hear from any rights owners, so that we may obtain accurate information. Upon request, we will remove material from public view while we address a rights issue.

CONSTRAINTS STATEMENT

The Arizona Geological Survey does not claim to control all rights for all materials in its collection. These rights include, but are not limited to: copyright, privacy rights, and cultural protection rights. The User hereby assumes all responsibility for obtaining any rights to use the material in excess of “fair use.”

The Survey makes no intellectual property claims to the products created by individual authors in the manuscript collections, except when the author deeded those rights to the Survey or when those authors were employed by the State of Arizona and created intellectual products as a function of their official duties. The Survey does maintain property rights to the physical and digital representations of the works.

QUALITY STATEMENT

The Arizona Geological Survey is not responsible for the accuracy of the records, information, or opinions that may be contained in the files. The Survey collects, catalogs, and archives data on mineral properties regardless of its views of the veracity or accuracy of those data.

CONTACT INFORMATION Mining Records Curator

Arizona Geological Survey 416 W. Congress St., Suite 100

Tucson, Arizona 85701 520-770-3500

http://www.azgs.az.gov [email protected]

~ I .~A ;~ " - -F~ :~ '~ ' ~ . . . . . . . . . . . . " ~ ' ~ : ~ L~ . . . . . . . . . ~ . . . . . . . . . . . . ~ - -T~ r~4 - -~ "~ " ~ "~ ~ , ' ~ " " . ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~ " . . . . . . . . - . 7 ~ . ~ : ~ ' q : ~ , ~ ' ~ T ~ . , F : , ~ r ~ . , ~ . . . . . . . . . . ~ ~ ~ ,~ .~ ~ , ~ *~ ~ ~ . . . . . . . . . . . ~ , ~ ~ C ~ ~ ~ . . . . . . . . . . ~q , ~ ~ ~ . - ~ . . . . . . . . . . %. ~ ~ - - , ~ . . . . . . . . . . . . . . ~+L ~ . . . . . . . . . . ~ % . r ~ , ~

. . . . . . . . . , ! : i : : • . . . . .

• : r - " "

~AR 1 5 '~974 ..

' ~"~" ': !~i~.

EXPLORATION OEPlro

Air Mail

February 27, 1974

Mr. W.:L, Kurtz Southweste~nDivlsi0n Tucson Office : -

• •~ Arizona Alluvium Geochemlstry at sacaton

Dear M r : KurCz: ~ "

Referring Co Mr. James' memorandum, of February 15, I note: ChaC detrital dispersi~n~ pa~e~s of Ore.metals appear to occur in indur- ted ali~lum acSacaton./.Alchbughft is uncertain how far laterally

this dispersionhalo m~ght extend, it se?m.9 logical that it should p=ov~de 'a 1 ~ r g ~ r iCar~eC Chart Ch~. ~ ' e . ~ c s e I ~ , :ana~ i f %~Cts faeCor y procedures for sampling rotary cucclngs ~ould Be worked ouc, an addi- ciona~and inexpensige parameter might be offered for interpretation o f pediment dri, llholes.

. . . . Y

t n most •cases ~ f ~6~S~e, :C~e~'~e~!g~ical d a t a o b ~ a l n e d ~ r o m C h e bedrock pene~ration~li pro~vi~et~te ....... same information regarding proximity to mlneralizatlon &s might: be' expected from ~he alluvium, probably with more precislon and confidence~ but it is also easy to imagine specialcases where ~he geoChemlcal data m~ht be of particular value -e.g. in a.faultedarea~awildcat bedrock penetration might be Cotally.ne~t~ve 8eologfcaliy~ yeC not far fromadjacen~ hidden mineralization, in whlch:ca:se positive geochemical information from the alluvium mlght encourage m~re penetrations in the face of the apparently negative bed rock::da~a. Please pursue this further with Mr. James,-and if it •ispractical ~o s~mple rotary cu~tlngs close tO bedrock on a ~outine basis~ ~hen the ~echnique should become standard practice~

cc-: u r c r i g h t LDJames: MPBan~es

• ' ; - , -

Very truly yours, ONIGINAL ~ IGNED BY

~oC. OSBORNE

: T. C. Osborne

. , , . --

G E O P H Y S I C A L 3 4 2 2 SO~TH 7 0 0 W~ST

S A L T LAKE CITY, UTA/I 8 4 1 1 9

February i0, 1971

MEMORANDUM to R. J. LACY:

Introduction:

D I V I S I O N B.C.I~.

J. ~ or. F~ ? ' ~ 1371

F~.8

y~,l~ FEB 1 1 197~ / GE0CHEMICA50RIEm:ATION S0T~ L01~iq0~ DgPT. ~ AND GREASEWOOD STUDY,

SACATON PROSPECT r PINAL COUNTY r ARIZONA

Whilst carrying out an orientation study of Hg in soil gas over the Sacaton orebodies (my memorandum of February 9, 1971) Mr° K. H. Nation of the Geophysical Division also systematically sampled soils and greasewood bushes. (Figs. I and 2). Although it was realized that the local overburden is transported and derived from elsewhere it was considered worth- while to determine whether the trace element content of these particular surface sampling media in any way reflect the presence of the underlying mineralization. The possibility of aqueous dispersion, in the case of Cu, Pb, Zn, Mo and Hg, and gaseous dispersion in the case of Hg, from the underlying mineralization being reflected by anomalous metal concentrations in the soils and greasewood could not be disregarded.

Conclusions:

Neither the variations in Cu, Pb, Zn, Mo and Hg concentrations in soil nor Cu and Mo concentrations in greasewood display any apparent relationship to the presence of the Sacaton orebodies,

Soil Samples:

Surface and depth.soil samples were collected. Surface samples com- prised a composite of material from I - 2 inches depth collected at the corners of a square of side 25 feet centered on each sampling station. Depth samples consisted of soil auger cuttings collected from a depth of 3 - 4 feet below each station.

The minus 80 mesh fraction of all soil samples were analyzed for Cu, Pb, Zn, Mo and Hg. (Figs. 3 through 12). The resultant data shows no apparent relationship to the presence of the orebodies.

Greasewood Samples:

Composite greasewood samples of most recent stem and leaf growth (last 3 inches) were collected along the circumference of a circle of radius 50 feet centered on the sample station. The plant samples were dry ashed and analyzed for Cu and Mo. The resultant data display no apparent relationship to the presence of the underlying mineralization. (Figs.13 and 14).

LDJ:db Encls. cc:J.J.Collins w / ~ l .

J .H.eour t r igh~ '" W.E.Saegart "

.----r--.

L. D. JAMES

\

• <i.., !, s 7 >'>',,;,', ........... ' . \ !1 ' >, ' " . . . . . . . :>, . W ' "", ,. , \.x" ' 'J J--: :

/ ' ,

l l I ' l !d ' /

, i - I

I

~ 1 I

i "~-x" ~ \ I " ' . - , ', ~-~ ~-.. ...f \ " ~ ; . \ . ~,, ~ ....

\ _ > . . i

!i \ , . ~ , , I,,L~ . l , ,<,~,- , ,. I,,,,- ,,,,.~i4 .I.

'X-~,~-.:.-/...~ __.._._. } . / ' ~ , .

k.., ~ " - ' - < > ~

" ~ , i~"

• ~ . :,,.,~

"-t ~ -<'-~. ~-t~ , ~ - " - . ~ ~ . ",i I'~ 7,' ~. s : " : ~ I ii ~'-,- ! II :' ' : r7 ''i~ X~' ' ' ~ ' : " " - L Y "-'x.._ !7,,, , 4- ,, ./"--,--., ) ,, ~ ,, ~ - - ' - - - - .;~_ ~. ,,)._~ ~ , i f ~ , . - . ~ Q - ~ O ."lSil I , . , . , , ~ l . . i i ~ I I : . I 1 " ~ , _ : # / II i i . / ~ '# ~. ii : : ! ~ ' , ~ ". ~ I ' " } .4! k -- k . _ i ii , :~ .~ , .~ . . ,& . - I I " i " II . . q t . ~ . . ( _ I I . . e . f i l l / • ~ .o ~ I, ' ,L : ,1 1 2 ~ ! ;

" ',--, t ~ - " - . - . ,u, - ' - . I ~l, ' I , ~ '¢-p-. . .~ . .~= -~ / i! ! ~ - - ~ f . . . . - % • I% " ! C h ( II " - ' V % ~ /1~ l " \ I I A , . . . ~ I I II : - ~"'~/x ~ ; . " . " t i l l tl i%. t ~

} ~ " ~ . . . l ii X , ' T k l k t il 1~'--. ,~ X'i I / X ~ " " - / L / / . , ~ l', "i II I I "% 1 \ < '

/ • . . - " I l l '~'0 I II ' I l l | " " I ! / / ..' _ ~ . . I~ . _ j . ", l ~ . l l ,' , II ~ / II . X II • " % ' [I II tt w tl J . # - -

i~i • -. , ~ 4 L--=---- ~i--~L . . . . . . JL'~--= . _ .JL-- ----~ ZJU----2-=~.,#L------...#--ILi -- JL. ..i " ;k__.} ~ - " ~ . ~ s~i:- -~/=- <-~--.-=-~ . . . . . =~=-i~-~=----~=:- ~i *~--=.~ ~-~- ~ , ~ - ~ - - : ........... ~,~I ; { • - h . .~ k# : il ; . - - - - i l l I / II / ' ~ I It I1: II , " I I - / ( . - - / . _ i . . . . . . ; t / T ! : - - ' ~ . " -~i'~0 X " ii ." I I(X" X / X II : .,~ '-\% "ll .. I l l v_ l r II [ ' ( # O d l l \ ~ ~ I ~ . l i . . . . . . . i . . . . . . II I / '" II • . ." 71 ~1 X X 1~(" . - . II - "" ,\ i " / " " I '

• I I , : I I • , ." X ~ IT P ' : ? ~ . ~ . . - --.-::~. :i :.,..- ~ " ; ~ . , ,,< . i l l . ~ : . . x ,k . ~ , , ~ EA ~ T i~- l i ~ " , / ~ " k II / - - i l - ' . - i - - ' " # li l l ) - - ' ~ ' t I 11 #~ l l l~ l l~ '~ l~ ~ I l l • ii : -- - T . l ' - - - d " l l l i d ' : ~ ' " l~.=f ....... ~c.~ -- . . . . . ~ = = = - - - . . . . ~I:.'-~,~ i i - .'.

! " - " - ~ _ ~ I " " " ~ ' 7 ~ ~ ' ~ : . " ~ " i ~ x ~ _i! " ,} i, ' !! I, - - , ],l I "- ~ . " ' ,~."~ I J - - - r II, / P "

t . i I " ~ 11' ' ,i _ l'. " II k II II ,

i " " ~ ° ~ ~ : ' " ' ~ " ~ = ' . . . . ,j ' : ' - , ,

..A ~% <~. . . . . - , .~ " - ' . - U ',I ] . ; " • ]I

7 d -

i "-x,,,._ ! "~ :- ' ~ - / / II f iX . '.:

- ." II

/ / " ~ !! ~ --!\ ,, ' : "---. .- ." "-.. II ,~' / i / '-,,. / ." ~i~,, I ,,

i' \ ._ . <,s" / ,,, . " ~', '-. • . IP";"-'<7 ,,~ , . p, -

• I, "'. d ' • - ,r" ~ #" ,,

....... o: ##

( "/

##

q

4

• ii Y.

/, /%

//

14e~ i~ " x .. • Z

, ~ ~ .

I

. 0 ~ i )

o.

• , :

"k & J ,

1 :•!! ~ ,,,~._.s ",--~

' ' h i ~ ' # 4 ; 0 0 - :. . i n

%. i.t-

i [ , J ~ , J

D , 9 ' •

IIQ: II '

. /

\ .:):,

1 i \

'Fig'. I - Sacaton Prospect, Arizona

' n I'

Soil and Greasewood Study - .

' Location of Samples'. " "..'..

, ( ;

/ , I

I , \:1

• - , , , . ,

• L

, f

, ~ , i l

, o

• ,t ¸

_., . l

~,, *, .~: ® I I

I

2.

4 =7 o a

/ 0 / /

/8 19

al

2O

w

21

/5

22.

/-s /7

2~

79

2l() 27 2 E; 2 9

~ 4

9~

4 9

..7~

$ 9

i

~'9 4-0 .4t

~ ~ d . 5"7

7 , : ' 7 1 7 Z

7g 77

9 4 ~ 9 6

o

~ 7

4Z

7~

7 8

8 4

9 Z

9z

~3

5P .e

7"t" 41

~S

"32

• i i

4,E

iii

- : . . .

47

* !

G.2.S m 9 7

i

/ ¢ , ' O ill

J o l m

/ o "j o

I ": 0 . 2 ,.,/.

0 . 4 ~; . _

/ 0 5 e 8

/o 7 R l j

t i t 0 ,

1/3

w

~ A C . A T 3 N ~..Nf E. R I M E . , , ' T A L h ~, . . , . . . , , ~ v E . V

~ A C A T O M ~ A R I Z C M A

D A T -~" ; 12" 1 2 - 7 0

!

! , 8~ ' t~ . , , . . ' . - C o . I

i B Y : ,<.H.?, . .~: ,~: , i

3O 16 Q

t~ t~ @

I<t ~7

t~ t7 t~ t~ I

t~ t'7

?

~t

t~

Q

t~ t't

~ 17 1.o

I ~ t2

,~. .~. .~

17 ZI 7.1

O ¢b $

.Z1. Q

q

'7

Q

,.+

2Z u

tq o

~3 Q

tq. i.z 17 ,'1

• Q @ • •

o

t7 E~ 0 • Q '

t~ Q

17 o Q

Ft @

d, @

t7 0 @.

2o $

3Jo o 0

Ig 0

~'c~,le. L"~ o - 2 , ~ L

cq o

e~ Q $,~c ̂ Y ON

:~u~FA C E

PRosPECT 0 ~R~20NA

~OaL. ~uRV~'y

' 7

15 Q. .!

/-

0.'1 ~V

I. 0

o

o . Z £

I I

~ g

0,4

1 0 1

O,6E.

1 0 . 9 E

t

$

O.8~q e .

a d

i t Q ~ 2

e ~4

o.~- N 4-9

~ g 0 . 2 N ~ •

.?.,~!

.26 0.7 2 ~ ,2.?. • * • •

~4

0

/9

20 21 . ¢¢ •

~3 19 LI II

• "4O ~

~o

• ,B • • • •

o

~ 6

I

~ / .~:~ ,

~ 7 ~ 4 o •

.~1 ,20•

~ :~ 19

3~ ? 4

~a : 6 29 Z3 Z@ ~

/ B

/7' [email protected] ~ d,

~ 4 o " 6

~.9 o

/9"

0 . 8 5

e

#

/

;Z:~'

~A, : :AT~N E~F '~"RIMEMTAL N]¢R~uP, Y S u R v ~ ' y

~ A C A T O I J s A R I Z O M A

E . Z . E , ~ A E N T - : CoPP~-R PP~

I~ SosL.

A ~ R I ~ ' A N ~ M ¢ / . I " ~ A~o ~ F / ~ C o .

DATe : t2" t?.-70 S¥" /4.H. NATIO~

{ . O M - -

O,ar W

1 O,~,u,;

t 0

/D

0.2.£

1 18

0 , 4 ~-

1 ® O,6E O,~tE

I I

0.8 , '4 - - t~ /~ 1.4, 14 ~ / ~ I~. • '1) • • • 11,

0 . 6 N - -

0.4 ,'4 _ _

O.~ .N - -

0 - -

.14

/d

~ o

I E

/d , -

~ o G

/ 8 1# / d

B

/ 4

14. I-~ •

1 8 • I E

/ 6

/ d

/ 6

/ 8

/ 8

/ 6 D

/ 8

_gO..

o

/ 6 G

/ 8

... •

/ 9

/ 8 '

~ 0 41

• / 6

/ 6

/ 2 , i " ,

/ 8 e

/6 16 I~ • IP 8

,~ o i,~ 17 ,,to. 18 16 • • 'B • • •

16

/6

/ 8

/ 8 o

, 1 4 m

/8

/S I

16

f ~ o

2 0

, / ~ t l

e

/8 Q

/ 6

/ 8

/ 8

14. / ÷ / 8 . lip e •

~ o / 8 / 6 / G

/ 4 ~o . !o o • • .

/ 4 o

/ 6 /~, / ~ . /'@ 0 " G • •

/ 6 o

18 e

0.4- S _ _

0 . 6 3 _ _

0 . 8 ~ _ _

/ 6 B

f 8 e

/ 8 / 8 / 6 ,ll

/ 4 o •

/ 8

/ 8 /8 g=,,,/= !". o

F ~ . 5 " " ~Su~FAC.E 5 ~ P z - ¢ - DATA

,..~At.ATOBI E ~ F E ~ I M E M T A L . M~..~CuR¥ ~ u R V E Y

~ A t ' A T O M I A R I Z Q M . ' ~ ,

E z, E t V k E M T : L E A D p P A A

~iv" 5o, I-

A M ~ , R I " A N ~ A A ~ E / T I N G A M D ~ E F / A I I ~ * G C D .

DAT~ : 12" t2-70 ~¥ - ,<.H.~[ATION i

t, OM

o.'v W 'o.~w ~ o, zg o.4g

1 I I 1 "I 0 0,6£

1 E&

0 . 8 £

1 $ 7

(18~,t - - 48 4g 49 46 ~0

I

0.6N --

0.4- N

0.2 N

0 m

c~s u

4a

• 49

S1

47 ,B

40

~6 4o.

S~ ~" o ~".Z d Y..

49 4+ 4~ • el, o

46" ~o

$9 49 X7

• ~ , .

4/ 407.

4 ~

4/

/o

4 ~

46

o

4 ~ 4

4a" 9~ 46

4s 48

4 2 5" . 5"~

4~ . °

44

x/4 8

Sd

• y 8

4 9

4 0

4 6 . o

4 s Q

4 ~

o

44 ~ ,Ip

.,44 46 46 5 / m • 8

48 9o 49 ,47 V8 ¢I • • II'" •

4Z 4z g •

d6 " ~'o . ~F 6 4 9

5o 5"/ F/ 47 ~'o 5".Z

~rl 5 1 5"~ 46 S= ~rl

. /7

";,9

s / . o

4B g -

o

~ , ~ S

0,6S

0.85 m

B

4 t

49 e

4 8 o

4 ~

4 s 4 ~ 4 5 • • 0

4,,~ o

.4"1

.,go , ' d i ,

4 6

t'; o.2,.,/.

F/'g. g Su;~FAC=_. S ~ a p . ' = DATA

SA~ATON E~F~'RIMEMTA~. M£P,<:uRY Su~v~'y

~'A r.ATOMI A R I z o M A

F_. a. E tV,~N T - : " Z ~ t . ' C p P ~

IN SoIL-

A M ~ f l I ' A N ~5,adt . r tNC. A~o REFt~t,,4C. C o .

D A T ~ : f2"12-70 ~ y : K .K . HATION

t . O ~ - -

1 0 . ~

L

I

o.~

I l

0,4

1 0 0.6,6

1 0,8~.

I

• •

<>e~ -- 'g

/ / • J

0.6N -- ,

I 0.4. N ~ ,,

2. 0 . 2 . N - - •

!

e

o

/ 0

/.

P

/

/

/ m

/

J /

/ U

/

/ 6

2.

/ /

i Z" D

! ' /e ,ib

! / I •

• •

/ /

z Z . . / /

/ t

/

,.?.

e

Z ,

/ e

l

2 ,

/ .Z

/

/

,¢

..~ .1 .7_ • ,a •

/ ! / • • •

I / . . I 2. / / / 4D • 0 • • • •

~. , I /

/ 0

I . /

I I I

/

,Z g

/

2. I I • • ,m

Z ." /.

0 , 2 . S - - / / / .

(P /

• . . . / /

0 ."

0 . 4 " 5 /

!

0 . 8 5 _ _

/.

• , o ,

/

/

/

I • i !

/ 4D

I

/

/ ° : O ' " J , , , / .

5 A d A T , % N E.).;t"~:RIMF-.t4TAL. M£RcuRY , ~ u R v £ Y

~ A C A T O I , . I I A R I Z O A t ~

E. I.. ~ ,',A ,X .,,I T ": ,.~ C A N .k,4o , "~ S D E,'.I ~J ,%', p P,VI

" " I~1 ~ o l / ~

~I, .4.CRI,~-AN ~I4.~/.TII,.IC,. A ~ D ,~EF'I,,,II,,.JC_-, C o . ,

DAT~ ; 12" ;2-70 BY: I</.H. JVATIO,',J. , • i

\

~ 0 q l

~3 • .. ! ~ . . ~3" 14, • . . •

17 .Z/ . . . . . . . • . . . . . . . ~1,

I t -I@ I ! . . . . . . q l

,~ :'.4-

"2.~.

I I I

• r3

,~-

a.

~7 Iq

• ,

. . • , .

• ~,g 1"7. 17

' t 7 t g , , t 7

e

17

r7

ZW

j -

-r3" - z3'

0

t7 'Z! • •

• . q f

..~l. ae. ~I, 41

,~. ,,~

q ~i

Q •

t ~ . . . . . . 4 1 - -

tS" tS" /~i' • " - e •

I i •

14. ql - . . . . . . . . . . .

; 3 , . . . . . . . .

, - . . . . . . , . . . . . . . . . - . .

z I " "

• -'1 " ~ z z , / ~ : t~ ," t 7

, . " t . . Z ~ L .

ff ~ . . . . . ,~. ,,;. '~. . '~'.

, = . r .

. . = . . . .

J ~ " , 1 7 ' : ; . . . . . . . . ' "

l

zg, . . . . . . , . : . : . - -

- " ' c ] " ' "

. 3 j , . . . . . ~ ..... . . : . : . . ,,~ . . . . . . . • . . , | • .

• , . { . . -

"5.

ZI

tot

;q , ' " . .

. ~ , " i ¸ i

• . . . . . I b . . . . . . .

g','~l,., t" o-=,,,L

R~. g' $ , ~ c ^ T O N PROSPECT , / I R ; Z o ~ ' A

1 "

Zl . . . . g

IA

DEp ' r~ ~OIL SuRVey

I L

LOM

O.'F tV

1 I, 0

[ 0,2.F..

I

o

® 0 . 6 E

I ~Z

0 . 8 E

[

O.6N " 'Z /

I

I

I

I I ,~ - / e

,2.

3 3" q~

/ 2.

0.4 . N

0 . 2 N ~ .

0 N

$

. . . . . .

W

. / /

/ / "

/,

I /

2-" 2

/

J * a

/ .

/

/

/ ~ j

/

/

Z f :

Z

Z I

/ a

/

/

} {

7

/

/ D

./

/

,2

/ /

I ~ 2. 2. o • o •

2.. ~ / / • • 0 • "

I C~%S ~ • / !

, 8

/ 0 . 4 " 5 ~ o

2 / b

/ ' J

S ' ~ f ' ; o.~z,,.,/'.

/ o . 6 S ~ •

0 . 8 5

7- ~A~ATON E~f'~RI~,tEHTAL ~?R~.oRY ~ u ~ v ~ ' y

~ A CAT'O,,,./~ AR/~-Oi~A

E "E,M~ENT': ~CA~ MoLYSDEMO/~ pP,'V~

/~ SotX-

AMERICAN ~ Z . TItJC, A~D R , ' F Z ~ Coo

D A T ~ : 12- 12-70 ~Yt K.H,~ klATlON .

I

'i 'I x

t.OM ....--

o

1

16

O.lE

1 /7

0.4

I O, 6E

1 I

/6 I~ O.~M -- • *

~o ~S

/ 6 0.6N -- •

/ 7 @

/7

o

,Z/ ~S • it

/7. ~D.'¢ N _ _ •

/ 8 0 - - •

/ £

17 /~

/ 7 "

17 I~

.7

/ 3

/ 7

/p

/8

"/8 @

• / 7

/ Y

/e /~)

/g

:2o ~ . e

• /.~

17 @

no :~/

/9 -/7,

/9 .~/

/7 ~ 21

"3o @

/9 . dl

: R I

• • • Q •

4"

.Zl ~Y 2o ~# p • • •

~ 8 / 7 o •

o.~s 18

o.6s __ #

0.85 __

o

.2/

el

/7 u

/8 o

~'~I~ /".. o.a,,/.

v

~Eig,/O D E P T H S~;PLF-- DATA

~AC.AT:JH E>:F'~RIME~'TAL. MF_R<uP, Y ~qu~v~:y

~ A C A T 0 1 . 1 S A R I Z O M A

E ~ . E ~ E N T : C O P P E R .ppA~

/H Ea/L.

DaT~. : 12- 1 2 - 7 0 BY." K . H . ? 4 ~ T t o ~ .

I.O M . - -

0.4- %M

1

i

O . ~ . W o

t.

16

0,2. g.

t /4

/

~.~ 0 . 6 E

1 0.8~

t

0.814 - - I4 76 /6 /6 P

/4 /,~

1.4 0.6N -- •

/ 4 0.4. N ~ .

o . 2 N /4'

0 ~ ~

/6 O.6S __ .

17

/6

/ 6

18

o

/6

/ 4 -

. /6 .

¢ / 8 b

/ 8 4

/6

/8

/7

/ 8

w

/6

e

/ 7

4

/4

14 14

/6

/ 4

/ 8

/ 6

/ 6

/ 6

14 I~ /~ 1~ .. 16

/6

.0

e D

I f - 12' m 8

e O

16 /6

/ g Ib

14 18 * o

/6 o

/8

/:

/6

/2

/#

/4 o

•/4

Q

/8

/~ I.~

/4- / ~

/6 /4 /6 e e •

/8 / ~ , /S

/,¢.. e

/ 6

/ 8

/G I

~'c~,/e f: 0 : 2 ~ /.

0.SZ

/ 8 f

~ A , ' : . A T ~ 3 N E...~f'£:I~I,ME,kITAL ME.R~.uRY ~ u ~ v E Y

~ACA~OJd~ ARt"O~dA

E t. ~" t ~ E,,,J "7" ." L E . A D p P',,,,n

/,q Eot,"

A M g R I . " A t , J ~M.~.,'7"ING A~D R~'F'IMt,"./G C o .

DAT~" ' 1 2 - 1 2 - 7 0 ~Y= f<.14., k,tA'r'toN

I .OM

0 . ~ " ~

I O , ~ . W

.\] 0

I

O.lg

I

e

0.4 ~ 0

1 O.6E

I 4 5

O. 8 E

I 4(

~ISN -- 4~ 41 " 42k 4~ 4 4 43

O . 6 N "

0.4" N _ _

0.:~ IV

4g o .

Z,

0 - - •

4~

~z 48. 49 D • •

4/ 4? 4 4

43" 4 7

~ 4 4 9 4 o

4/, 3"7

.ge, - ~ 9 S I

77 ~'8'

q o 4 4 4~',

:~6 4~.

4 ~

4 g o

e

4 o

45"

4~

4 S

£

47

5"o

e

..17,

'Ca"

• 4 Z

"$7 e

4 S

..¢S

4 7

4(, 4x 4[ ~ z d e

4 /

"~'o w

4~ D

49

4S

4 ~ J

¢~' 57

4~ 41 B •

4 S 79

4~

5"2 o -

o .

' f 5

44 ~-/ 4~. x~.. 47.

4 ~ m

3"9

~ 2 S _ _ .4 / 43 o

4 7 4 /

4 z 4 8 4g 5 " , 2 ,IL

4 4 o

: o . ~ l .

~ Z ~ ( 4 4 4 S 0 . 6 $ ~ ~ • • . •

0.85 _ _ 4 S

iJ

~/~/'9. 1.2. D E P T H ~,¢~4PL-~ DATA

~A~ATON E~FER/MEK/TAL M~'RcuRY ~ u ~ V E Y

E ~ . E ~ E N T " : .~ t N'C p p w l

,/,,'V 5 0 f l L

A M g R I : . A H ~M~4TIN,~. Aun F~EF'IHtHG C o .

D A T b ~ : 1 2 " I 2 - 7 0 ~ Y : ~ . . H . ~ , t A T I O N "

1.0 ,'4

0.4- %~2

1

]'

4

" ' r "

Io

I

t7

O.ZE

I 19 o

/

0.4" ~:

t I I. zZ b

0.SM ; 6

dl ; .8 "

e , Ik

0.6N -- , . ~s

I i

a :I 2.4 21

24

~7 ;4. e

16 ; g

O. ~, N __ ~,

a~

20

. . . ~ZS __ /2""

~..g"

2 ~ o

12

.21

2 .4 . i i

2 a

2 4

l y

• O,

• 6

3o 2o~

"24

. ~ 4 ' .2;,

.z~r aO

;.~ =/

;I ;o.

=z =:~

26 8

2o

26

~7

23.

22.

~0

o

~7

0"

2/. ~6 o

2~ 11

a.f ;8 4P •

2 4 .2~ 21 ,~ I 24.

~4- ,24 2 K a~, x7 • • • o

17 o

,111

19

~9

a~

2S a~

iS

21 O. & S _..-- ,,

22. 22 24 8

22. Z~ w

21 o.6~ __ •

0.85 __

q

21 o

R4

2f

~ . 1 3 F~LA~'r :5,~PL~ DATA

~A~:AT(SN ~.)~fERIME,kITAL ~ , q : / ~ C u R Y ~ U R V ~ " ~

~ A C A T O I d / A R I Z O A I A

A M ~ R I ' A N ~ M ~ g r l N ~ A,.,o ~ E ~ - y ~ v t ~ C o .

DAT~" 1 2 - 1 2 - ? 0 BY: K -N.N~AT~oN

1 . 0 , ' 4

0.4- t%t

1 \

Io

I °

O.ZK

1 @ ~ . 6 E

o .8

O, 8E

[

0,7 b

O . O N -- /,o 0,7 ~,'9 o, 9 O, 7

|

O,6N - - 0.6 0.9' O.6

o.7

O.7

0 , 7

0.7

o.~.

o. 7 0 , 7

0. .7 0.2 N -- ,..

~ 7

o.~ 'e,9 ;.o

o,9, / , o 0.6

0 . 8 0 , 8

~.7 ~. 9 0.9

o.7 d~

~,7 . o . 4 0 , 7 I I • 4~

~ . ~ o~7 ~, 7: ¢', 6 o .4

~,,6 " 0 , 7

.o,, g 0 , 7 /,.Z

o.9.. ~.7

0°7 o

0 , 6 • o . 8

o e

~ 7 0.7.

,~.9 o,7.

6;,6 ~,6 ..

0 , 6 ~ . g

0.7

~ 9 dl

o 8 o

/,0

0.9 D

"0.7

Z~ e

o,7 o

62.~.

0.4

lip

0.6

~,.7

0,6

o,8

c~.6

e

9.

o,7.

0,6

0 , 7 . 0" O.7 O,4 0,7

~',.Z 0,( 0.6 o, 6 • 6 e

o . 4 0 . 4 O. g o._. r

0.85 __ 0...~

• , •

[f~. /4- P L A ~ T 5x, .~PL£ DATA

~ A , ' : . A T O H E ~ f ~ ' C K ' t M E , V T . , ~ L . MERCOP, Y ~Uf lV~ ' y

~ A C A T O H ~ A R I Z O M A

E '..EA.%EMT': M O I . . Y ~ D F N C I A d pPA~

DATr~ : 12" 12-'70 ~ Y t ~<.H.~tATION -

0 , ~

J.H.Courtright

G E O P H Y S I C A L D I V I S I O N 3 4 2 2 SOUT• 7 0 0 WEST

SALT L~ CITY. UTAI[ 84119

February 9, 1971

B .C,;M,,

J . ~"~. C.

MEMORANDUM to R. J. LACY:

FEB 1 2

Hg in SOIL GAS ORIENTATION STUDY OVER THE SACATON OREBODIES, PINAL COUNTY t ARIZONA

Introduction:

In October 1970 Mr. K. H. Nation of the Geophysical Division carried out detailed Hg in soil gas studies over and around the Sacaton orebodies, Pinal County, Arizona. This work was undertaken as initial reconnaissance studies in April 1970 provided evidence, albeit inconclusive, that the orebodies might be locally reflected by anomalous Hg concentrations in soil gas (my memorandum of June 25, 1970).

Conclusions and Recommendations:

I.

.

Soil gas studies over the Sacaton orebodies failed to detect any anomalous Hg concentrations which could be definitely related to the presence of ore.

It is uncertain whether these results are related to lack of anomalous Hg concentrations in soil gas over the orebodies or the inadequacies of our field and analytical procedures.

. The study has been of value in so far as it has provided evidence that grossr readily detectable Hg in soil gas anomalies are not to be expected in the vicinity of "blind" porphyry mineralization.

. It now appears likely that any successful demonstration of Hg in soil gas studies inthis environment would require more sophisticated equipment than we have at present. Probably equipment capable of making direct measurements in the field would be the most satisfactory as it would thereby be possible to carry out exhaustive orientation studies under varied climatic conditions at the site. Potentialproblems inherent in the handling, storage and analysis of the Hg collectors would be avoided. We could obviously attempt to develop such equipment ourselves but at this stage it would probably be advisable (taking into account both cost and speed) to con- sider use of previously developed equipment. A proposal for a possible joint research project with Barringer Research along these lines will be discussed in a separate memorandum.

/ j"

/

/

I

\

\

®

-2 -

Field Techniques

General

The field study extended over an area of approximately one and one half square miles. The E. and W. Sacaton orebodies l~e within the central part of this area. The orebodies are obscured by "alluvium" and conglom- erates and ore is nowhere less than 200' - 300' from surface.

Sampling was carried out on a grid system with highest sampling den- sity (i.e. around 250 ft. separation) over the orebodies and lowest (i.e. around I000 ft. separation) in the outlying areas (Fig. i). The grid was laid out by driving a vehicle along compass bearings and utilizing indicated mileometer measurements. Drill-hole locations provided adequate control for the layout of this grid system.

Hg was collected from soil gas at each of these stations by both static and pumping systems. In addition soil and greasewood samples were also collected (resultant data discussed in a separate report).

Hg in Soil-Gas -- Pumping Method

Gas samples (i00 cu.ft.) were extracted from soils by a gasoline motor powered vacuum pump system identical to that used in our British Columbia field studies (September 1970). The gas samples were passed through 2½ inch

diameter 80 mesh silver screen "Hg collectors". After use each collector was individually packed in a sealed plastic container and shipped back to the Geochemical Laboratory where they were analyzed for Hg by our atomic absorption technique.

Holes for soil-gas extraction were dug with a hand auger to a depth of around 4 ft. Soil-gas was pumped at a rate of i0 c.f.m, for i0 minutes from these holes via a probe sealed in the hole by an inflatable sleeve.

Hg in Soil Gas -- Static Method

When the field work for the pumping study had been completed, open ended plastic tubes~ each containing a "Hg Collector" screen, similar to those used in the pumping tests~ were inserted in the test holes. Plastic rain shields were placed over the top of these tubes. After 48 hours the

"Hg Collectors" were picked up and placed in sealed plastic containers for transmittal to the Geochemical Laboratory. This system, which was previously used in our test studies in E. and W. Canada in 1970t is designed to enable measurement of Hg gas emanations from the soils. Presumably it is also in- fluenced by Hg concentrations in the atmosphere.

H~ in Soil Gas Data

Hg concentrations in soil-gas display apparent variation when measured by both static and pumping systems (i.e. < S - 17.5 nanograms and 5.5- 21.0

• ," f~

\

\

i

-3-

@

nanograms respectively) but there is little or no correlation between

the respective distribution patterns (Figs. 2 and 3). Neither do these patterns display any apparent relationship to the mineralization. Close examination of the data in fact indicates that most of the more dis- tinctive concentration variations can be closely correlated with particular analytical batches. This suggests that these variations are related more to analytical error than any other factor.

s

LDJ:dB Encls.

cc: J.J.Collins w/encl. • J.H. Courtrig

W. E. Saegar t "

L. D. JAMES

I /

\

I

! 7 . - . . , .... , \ . . ...--\

\ , - I \ , . . .

' i I

.-" \ \ / ' ~ Hit "----

H h + ~ , \ I )

" ~ • . " - { ~ . . . " ( , . O,Zla~!: , (~, . , , i t .

'=='~--~, ' ;~2==' . . . .''- 2 3 " " '.:L~'I 'iJ; " J"~")~'~"

• " ~ ' ~ ' ~ " " 1 5 2 0 " - " ,('~..~. .: . . . . ~ ~ \ " , . .

o . ~ o , ~ ..... [ ~ .i..= " , , L ^ ~ " " ^ .

"'l ,' '

/ ' '1 * ,"

x , p ! ,

X " " ~ ,i 2"'. r ~

,0° "'..,, ., ,

. < . . . . . . . . . . . . . . . ~ ~ / , . \; ,:

0 .... ___- ..... .i- I .... -~ ~, ........ 1 • +,+~ i09 t ~ " ~ ~ R O A D X • _

: ~ - - ~ / " " - ' x " '-- I~ | "" " | ; ~ ~G I~

C",+ + " ~ ' + ' x+ x II r ' J ~ II , ' i II : - - / I I + " " ~ " ' L ~ II ' L t~

, ",,,-,~ : ~--.. I ~- - I II ----/~ , X {, ~ "~_~. i " t G{ . k . ' • \ I ~ \ J~ It / ~I " k l t I I I I II TX,,,~ g ~.

- , " , . -'--o.~0 ~ ,,__,_. .,, ; . ,, "-, ~_ ~ , ,,. , . - .- ._ _ ,, - . , : , i~ ~ : • : - - ~ ^ ~ ~-= . . . . . = ~ 4 ~ . . . . ;-"=.I~-==,~===;:~;t~'= :-,,, . . . . . ~ / ' x i ~ . . . . . .'I f ~, / - " ' ~ !"\, ' , ,'"',._ z ,, t ~ " ~ . . l I . x ~ l I F - - . ~ ~ r l"

• J . . . . , , , , ,~Y ,+ , • . ,, , , ,

: t - " - ' t . o ! , , " . . , - , / , r , . . . . , , . . . 2 I ~,*'~,K • . ,, -., , , , ,: • ~, , ~ + / t - ,, " I ' II "- I

+ : _ L - ' L - ' ~ ~ ,, • .,. l 2 6 , ' / ~( ~; ~ ~ I;:~,.'N, .. x .~ / x,, 2 5 ) x,, ,ix t }1 ,

• -'b \ , ~-~ " / ~ " V " t ~ 4, ' ( - ,i~ ~ [ "/+~-.<~ " "~ ~ '", ~I ) • + : . - ~ \ . - ~ - -~ '~ - - - i .L , / iv .." It • . ; X ~ ~1 X . ~ , ~&- - -mJ " 1 X I ~ , I I - " "- "~ ~ / ~ * ] " - ' f l ' { ~ {

: / t ~ I% : ' II ~ II / \ . . ~ 1 , ~ e / II ~l~ II . " ~ . / ' I1 f'l II ,p i ' . l~. ~ / p, . " ~ , , " - - " - - " ' . . . . ~ ; ,, : : ~ I, . - - ' f , x . , II. ' % , ~ i i / ~ _ " / " ~ l ~ . i I L L - :

.> - ' -~" . ._ . . "Y...._. ',I / .... - " * : ' , - ._ , . ' ~ ',: "X ~ . . L+ ',,~ . . ~ x - . - - -7 : -~ , , - . ; _ j l . . . . :~,& . . . . ~ . k l~ • ~ - , . \ i ~ = . . . . . . . . . - ~ - ~ , - - . . . . . ~ - . . . . . . . , I .".- .-~,,~

' ~ i , : ~ ' - ~ ! ¢ ~ , ~ : ~ * ,,, , ..... { ~ E £ . P ) b R E B O D ' / I ,

i

ti ,i /'{ " ' II II

• I I I I

" "" 1 :'t, ) X# IIX

1483 :

.,.,/X, :: IH ' • ~ " ' ,L ; \ . • : : E a s t l ';

- 1 t % , • I e / / 4 , ; ~ k i l l l : II ". ,, I ~ ~ ,.. 4: VII i

"..., ~ '-..~ , •

: ~ ~ "- ",, ~ . s "~ " ,;1~ ,' , / S c o l e I: 0 o 0 i

, . ,,- . 7 ,~J~- / / X : . '" :

.:" ~"--<-. ++o.~L1".~ ....... ,__, .... ,.% .... ,,., .......... .~, ...... I, ( ': 7--..------..._,' . "7t. ',', ./, " ~ * I ~ , . . " W " , - - r . ~ " "---4 , 7 " , • . / \ v ' : ~ " , J , " . - , , : . * . T ~ ' . . . . . " ,

; ] " - " ' - ~ / . _ ~ ,7' ' 1 ~ , . . ~ : ,' , ~ • " ' t ] ~ , . , , . , , o = . ~ - ~ . . , , . . = , , - - , , ~ . _ ~ ' " ' , , , t , ~ ( L , , ~ • ~ / " ~ X u , . f . T ~ ' : : ~ ; , , ; , ' - - - - - -~L. ._ 3 / , ~ . J ' ~

i / ~ i ,.- " - - 4 \ # ) , : ; ' ~ " ~ , " : i " ! i

77 II " " ,__1 j . . - ~ ~ ~ ~ # X ~ ' ~ + ~ - 4 ~ ~

• ~ / ' ,,,, / / ' " - ' ~ - - '1 \ . . . . . ,L . . . . . . . . . . . . . . . . . . . . . . . . . " =

- . - ~ L t ; . ~ . :

II / " " - I t "; '

" ~ " ' a "' • ',

" "'" ' ~ / " ' " : "~ i ' ,) " , a ~ o ~ , \ '~ f " ~ - ~ : ' " - t ' ~ " - ~ "" - - - - u . 4 . . ' ' .2_)

4

Fig. i - Sacaton Prospect, "Arizom.

" Hg in soil ~as study.-

o 0 Location 'of samples. ..

• ° • - . . + . o . . \

, :

' ~ " "" "5, ' \

r , +!

, i

/ h

• • / + ',,')

! I

o,'~ &v o. ~ ~v

1 1

L O M - -

0.?-~

I I 0 0o6~ O. eE

1 7.o 9.o

O.8M - -

7.9 9,5 Q.

/ / .5 /0.o ,9.o 8 . 5

o.6 N __ ~S. /7.0 /o .o 9;F 9.o 9, ~ ~. F • I~ e •

9,5 /~.o 8,5 9,S 9,5 /4,0 /~,~

O.,4. ,V, /;" ~ . 1 •

7 , o 0.2. N -- ,

0 - - •

8,0, 0 .2 ,$ __ , •

9 , 0 .

9,o

.%0

o

No

/0o 0

9,5 ,g,O

9.F 9 ,o P 0

;~o 8-• o

&o ~'.o //,o

/ z o • o

t~.o 9 ,o • e ' (

~.0

9,5

/ / . o

£ .o 9.s • lJ

• e

/2.5". 9i o

go. 7;s / / ,o /oe, ..,e

Q

9,£ / / . .o " 6 l i

6:.0 9.0 e •

• •

~ o 9..9

9 , O

9.o ~ o . / 2 ,0

/0. ~

R~ e.

(/&5" . /~.E' /o.S 9.o

l a o :~ a 7.S ,D LI

g,S 9. o • e

,~..c, B .~ /z o 6". o 6,o LI, I~ 0 e •

9.S 8.o • •

/ a , o 5"~/e t"; o.= , , , I . o

J/,O e

/0 . 0 9,5 /o .0 /o.o I.~, o • • I~ 0

/~,o, 0.63 i

t

0.85 __

/0. 0 9.0 i ,

/O. .F i l l

.V.o • , ' o

n 0 ; L

r

~ , 3 $ ~ A " r ' ; c S,~,.,~pL." DA-rA

~ A ~ A T O N E,~F~',RIME,VTAL. M&RCuRY SuRvlEY'

~ A C A T O M o ARIZOAI,A,

EL~ '~ENT ' : ' MERCURy MAHO~,RA~S

I,V Eo lL GAS

A M i S R I ~ : A N ~ M ~ T ' I N ~ A~JD R E F { ~ I H G C o o

DAT~ ; 12" 12-70 ~ BY" ~<.H. HATION i i . . . . . . . . : . . . . . :

/ " d

/,Oh/

0 . ~ kV

1 O . ~ . W ) 0.~ E

l '1 0 . 4 ¢

1 0.6E

/7,~

0.8~

I

//, 5

0.6/4 ---~ /o. o 21,0 /.z,5 ~,.0 " 2 ,o

/8.0 " 0.6,'V •

7.~" 7.5"

/ / .o 9.-;"

/~ ,5" ~,o ~o o

/.~.0

9.O

9.0 O.4-N _ _ •

,2,o

" 0 m _ •

Oo ~rS - - o

/5. 5" 0 . 5 3 _ _ •

Q.SZ _ _

9.5 E o • •

/o,S o

/o.o / / ,5

Io, ~ /t, 0

7,5" 7,S ~,o • 0 •

~.~ ~.~.

• "z,£ - 7 . o ~ . ~

~,o NE

~.s'. N.c • ,b .

(.o s . s "L) •

~.o 7.0

8 .0

14, 0

• •

/~.0

12;0 / ~ . /2. 0

£,5" 7.3"

£.K 9.5

~ 7 ,o

~,.~ ( o 6.o

,:.~..,5. #. ff

6.0 6.0 ~. o

/,T,,,¢ /.Y,o

//, 5" /2. ~

~ . 0

/ /

8 . o

/ , 7 , 0 . e o

/5",0 / / . 0

0 0" //.5" /2.0 /~, o

~,0. - ' / 3 . 0 m

~-5 .

,~, ,F • t ' "

5 , E

d

/5 .0 ¢

/3,,£ o

~.~ .

~ le I": 0"2,,,/.

• , . •

/Y.o o

1~. 2 PUlVL P ~A~.PL~. DATA

~ACATC)N EXF{RIM'E~/TAL M(R¢uRY SuRv£Y

~A CATOM t ARIZOMA

AM~,RICAN ~M~rlNrP A~D ~E'Fi'.'Jt,~JG CO.

DARE; : T 2 " 1 2 - ' / 0 ~ BY: K ' H ' ~ A T I O N m

~MORAN~)UM to R. J. LACY:

G E O P H Y S I C A L D I V I S I O N 8 4 2 2 SOUTH 7 0 0 "WEST

c i r r , ,rr u 8411D C," -|V O January 27, 1971 . .>,- ~.:\

.,.,. JAN 28 197i

VISIT TO THE TUCSON OFFICE AND SACATON AREA - JANUARY 20.-211 1971

January 20, 1971, was spent in the Tucson Office briefly discussing geochemical aspects of several projects with Messrs. W. Farley, J. King and N. Whaley. January 21 Mr. Whaley visited the Sacaton district with Mr. K. H. Nation and myself.

Proposed Geochemical Orientation Study of Groundwater, Sacaton Area:

Information obtained by Mr. Whaley from the Agricultural Department, University of Arizona, indicates that the proposed geochemical study of groundwater in the Sacaton--Casa Grande area cannot be attempted until Spring or Summer when irrigation becomes widespread. I plan to initiate the study as soon as the conditions are satisfactory. \

The morning of January 21, Mr. Whaley visited the Sacaton area with Mr. Nation and myself in order to instruct us in the general nature of the irrigation pumps, etc., so that we might be better aware of the nature of the water samples we propose to collect.

Mesquite Study I sacaton Area:

Mr. Nation has begun a on& week to ten day mesquite sampling program over the Sacaton--Casa Grande area. This study is designed to determine the extent to which trace element, in particular Mo, concentrations in Mesquite reflect the presence of anomalous groundwater and, indirectly the presence of the Sacaton orebody. This factor is particularly im- portant in other parts of this district (e.g. parts of Stanfield anomaly area) where little or no sampling access to groundwater is available.

Mercury Study I Sacaton Orebody:

As part of our continuing program of investigation of Hg distribution in and around porphyry deposits the afternoon of January 21 was spent obtaining representative samples or core from drill holes along the 550 N. section line across the Sacaton deposit.

Mercury Study, Silver Bell:

Mr.. J. King, who was recently engaged in a geological study of the Silver Bell area, was interested to learn of the anomalous Hg concentrations detected in two un-mineralized rock samples recently collected by myself from locations some distance from the known orebodies and analyzed

- 2-

o

in our study of Hg distribution in and around this and other deposits. This anomalous situation appears to provide supporting evidence for certain hypotheses he has developed of local ore distribution. It could conceivably be indicative of primary dispersion halos related to mineralization at depth.

As there is a slight possibility that my original samples, which were taken from the vicinity of the mine haulage road, could have been contaminated, Mr. King has agreed to collect a few additional samples from the same general locality. If these new samples prove to carry anomalous Hg concentrations a systematic rock or soil sampling program in the vicinity of the Silver Bell orebodies will probably be warranted.

Picacho Area Groundwater Data:

Mr. W. Farley has previously sampled groundwater from wells in the vicinity of Picacho, Pinal County, Arizona, in an attempt to evaluate the large magnetic anomaly occurring in the area. On the basis of data ob ~ tained elsewhere in the region the Mo content of the samples would be provisionally classified as possibly or probably anomalous. However, this apparently anomalous groundwater could conceivablybe related to known mineralization (i.e. Silver Bell--some I0 - 15 miles distant). Of possibly greater significance is the local occurrence, particularly in the immediate vicinity of the magnetic anomaly, of apparently anomalous Cu concentrations. These certainly merit additional attention as the Cu would not be expected to have moved far from source (be it in bedrock or in the valley fill) because of prevailing groundwater conditions. It is planned to'undertake further work in this area when the next irrigating season begins. Apart from resampling of groundwater, pH measurements will be made. The presence of acidic groundwater in the immediate vicinity of the magnetic anomaly could be indicative of proximity to weathering sulphides.

LDJ: db

/ cc:J.J.Collins J.H. Courtright W. E.Saegart

• J~A

.~ L.D. JAMES

I G E O P H Y S I C A L D I V I S I O N

3 4 2 2 SOUTH 7 0 0 ",TEST

SALT LAKE CITY. UTAH 84119 Jur 3 0 , gZO

June 25~ 1970. j . H . C.

"( 't970

Hemorandum t o R, Jo Lacy I

RE Hg CONTENT SOIL-GAS SACATON PROSPECT, ARIZONA

In view of the potential value of Hg concentrations in soil-gas as an indicator of significant blind sulphide mineralisation~ the Geochemical Section has recently developed apparatus for the collection and measurement of Hg i~ soil-gas. Instead of depending upon the slow natural transpiration of soil gases into the atmosphere~ as have the U.S.G.S., the new apparatus is capable of extractlngmeasured volumes of air from sealed~ auger drilled holes (around 3" diameter). The extraction is made by a small gasoline motor driven air pump and the Hg in the soil-gas collected on gold or silver wire mesh. The Hg can then be determined in the laboratory using a newly constructed attachment to a standard atomic absorption spectrophotometer.

Mr. E. H. Phillips spent April 20 and 21 at the Sacaton Prospect 3 Arizona~ carrying out the preliminary field experiments over the known blind Cu orebody,which lies beneath a minimum of I00 feet of alluvium and Tertiary conglomerate. Mr. Wayne Farley of the Tucson Office spent April 20 with Mr. Phillips# advising on location of the mineralised zone~ etc.

On April 20~ Hg was extracted from I00 cu. ft. soil-gas samples collected at 200 ft. intervals along an approximately NNW - SSE trending traverse whose central section overlay the eastern portion of the "shallow" West Orebody (Fig. I). The next day similar samples were collected from an E - W traverse along the ii00 N line. This traverse overlies the northern portion of the West Orebody and extends for over 1500 ft to the east# over the deeply buried (i.eo I000 - 2000 ft.) East Orebody.

The majority of the Hg in soil-gas values are less than or equal to 2.5 ng/100 cu. ft.~ but a few somewhat higher concentrations are locally present~ particularly over the western portion of the West Orebody (Fig. I). Although the sample traverses are not sufficiently extensive for definite conclusions to be reachedj the available data does suggest that the buried orebody could be locally reflected by anomalous Hg concentrations in soil-gas. The reason for the '~nomalous" v a l u e a t t h e e a s t e n d o f t h e E - W t r a v e r s e i n u n c e r t a i n . T h e p o s s i b i l i t y o f c o n t a m i n a t i o n f r o m d r i l l c u t t i n g s o b v i o u s l y s h o u l d n o t be o v e r l o o k e d ~

,/

I -2-

but the Hg concentrations in the soils (Fig. 2) do not appear to display any obvious features which could be related to this factor,

Further experimental field studies are definitely warranted at Saca ton as w e l l as o t h e r s u i t a b l e l o c a t i o n s i n the S.W. I t i s p roposed t o c a r r y t h e s e out as soon as t h e p r e s e n t s c h e d u l e ( i n c l u d i n g Hg in s o i l - g a s t e s t in E. Canada) a l l o w s , but~ in any case~ no l a t e r t h a n e a r l y F a t 1 . High p r e v a i l i n 8 t e m p e r a t u r e s i n t h e S,W. t h i s t ime of t h e y e a r would s in any casep l l k e l y produce s e v e r e i n s t r u m e n t a l p rob lems .

. . . . ~ . ~ p

L. D. J~MES

LDj:bm

c c : J J C o l l i n s J H C o u r t r i g h t k ~ S a e s a r t

i /

/

Project 295 I I I ASARCO GEOCHEMICAL

I I DATA

Page

Area Requested By No. Samples

SAM PLE NUMIRER

Hole #i

3 4 5 6 7 8

i0 11

12 13 1 14 15 16 17 18

19 20 21 22 23 24 25 26 27

28 29 30 31

32 :ore/East Or@ Body :ore/West Or4 Body

SACATON. Aei~ona L. D. James

C u P_kb z_an _ _

ppm ppm ppm ppb soil gas

33 20 50 19 I.i 20 14 45 24 2.7 17 20 44 19 1.5 19 14 47 26 2.2 21 20 54 26 2.0 20 22 47 23 1.8 20 16 45 19 1.5 17 20 47 18 1.8

21 18 48 15 2.3 16 20 39 18 1.0 16 18 39 23 1.5 15 20 40 21 2.3 18 20 41 19 .!.6 21 18 44 ~ 1.3 23 18 43 31 1.8 23 14 47 18 4.3 23 22 42 23 4.7 18 22 34 26 2.5

21 24 37 32 9.2 20 16 39 29 2.8 23 22 39 38 2,~ 21 18 43 41 ~,~ 20 22 44 45 2,~ 23 30 41 37 2.5 19 18 37 27 2.2 20 18 42 24 2.5 21 14 41 20 9.8

21 24 43 29 5.3 19 24 40 19 23.0 17 20 40 20 2.5 19 20 40 17 4.0

17 24 36 30 5.3 216 165

~ 7

Da~e 5/4/70

J I

I t

i

i I

i

i I I i I I

- - z = o o N

/

-SSO fl

-oN

| "~ el3 550

/

/ I

\

J f

, /

• ~'0"+' 2 . 5 -,o

\ \

~ . 3 - 0 -=,+ 2.~r

~"3 .z~ 9"~" ~7 i ' l l "~'

~-',3 "12

/ I-~" ..

o~0

J

:2:2 .~

1"5 "i'

.i/D

4 " 3 ",~ 2 .0 "s

2"5 . ~ 2"5 .~

I

z z ,÷ /

I'1 -, ,

~ . j J

\ ~ , , , , . ~,,,~ , , ~

L E G E N D

HQ ,'~ SO~l-9~S EOlL ql~5 5 A M F ~ L O C A T I O N (~ / (OOc .#L~eSa , -p (e no,

ApFox dGpfk("~t.~ t'o t~arock: \

\ l i t / , ,

/ t "-~

S

Z. 5 .z= 2 .5 .~, 2.8 .~o q '2 .,'~

F-2~. i . . .~A C A T O N P R O S P E C T - A R I Z O N A

5c~ /e 1" = 3 0 0 '

9

8 -

7

6 . _ _

4__ ,

I

[

,5, I

t o _ _ O

|

O x ~

I . . l u }~

; . ~ - -

N ~ ±

. r ] ; . _

• H - - - - - H -

I .

_-L:2_: " . : [ •

!o!

3 ! 30 2~

I

I "

t . .

] -

: . . . . . - - - L _

~ -

t " [ "

t :

. . . . . . . . . . 1 - - . . . . .

f I

z ' l z ~

• - / , : ~; • -~ F ~

J

'" " ~ I " . i

t

[

. . . . . . . ]- . . . . .

• I

I

i

_ _ _ _ _ 2 _

1 -

f

• I

. . . . . . i . . . . . . . . .

i

Z5 2 4 2 3 Zz 2,

I T •

- - ~ - 2 _ 2 _

• I "

i i ~

: i _ I :

k 2; : " :

! -

. ! ! :

~ '_ f _ 2 . . . . .

• • w

I - _

" T

" 2 . i - :

:

i :

____J t

• . . . .

T T , ~ 1 . . . . .

Z O

• " ~ " / : ' . 2

J

TO:

FROM:

Aa-16A. 3.19B

® FJ- . • oH.c: • 6 2 1 965

AMERICAN SMELTING AND REFINING COMPANY / Tucson Ar i zona,~ - -0 . ~ ~

• January 19, 1965 ~TP~_.-~ # ~ __...Z

At~$wERS =....HANDLE

J, H, COURTRIGHT ~'v'.~R 1i 1965 eR~P~ it~|TtALS~.=..-- -----~'." RLE.--" . . . . .

N, P, WHALEY

GEOCHEMICAL SAMPLES - SACATON DIAMOND DRILL CORE AND ROTARY CUTTINGS SAMPLES ANALYZED FOR

TRACE AMOUNTS OF COPPER AND MOLYBDENUM

SUMMARY

The sampling of in-storage d r i l l hole mater ia ls from the Sacaton Pro ject area was carr ied out with a dual purpose in mind: (1) the cont inuat ion of a program to invest igate the potent ia l of geochemical sampling in porphyry copper explora- t ion and, ~ ) the hope tha t , should such a po ten t ia l be real ized in this instance, the results might contribute to a greater knowledge of the d i s t r i b u t i o n of minera l iza t ion w i th in the prospect area, Sampling was conducted under the preconceived assump- t ion that trace amounts of molybdenum would probably be of greater value in de l ineat ing regional copper d i s t r i b u t i o n than the seemingly e r r a t i c concentrat ions of copper of ten found in samples and hence, as much material as possib le, including that which exhib i ted v i s i b te copper m inera l i za t ion , was sampled while the oppor tun i ty was ava i lab le . One hundred and sixteen samples were taken from diamond d r i l l core and rock b i t cu t t ings of assumed bedrock mater ia l . Both the oxide and the su l f i de zones were represented. Seventy-six of these samples were analyzed by our laboratory in Sal t Lake C i ty , and the values p lo t ted on a plan map,

Visual examination, incorporat in 9 values of a l l sample types, suggests that there are very weakly anomalous areas which are crudely co r re l a t i ve to those areas of higher concentrat ion of base metal as developed by C. J. Orback from d r i l l hole data in Sep- tember and October of 1963, but values are much lower than those usual ly regarded as s i g n i f i c a n t , Considering the degree of cor- r e l a t i on , low values, and number of var iables in material sampled, i t might be said that the dispersion pat tern displays a tendency to r e f l e c t the areas of known minera l iza t ion when used in conjunc- t ion with data from other sources, but that i t is i n t r i n s i c a l l y non -de f i n i t i ve ,

SAMPLING

A to ta l of 116 samples of assumed bedrock mater ia ls was co l lec ted from the Sacaton Project area between March 27 and Apr i l 6, 1964, Of these, 74 were chip samples from the diamond

/

Mr. Cour t r igh t -2- January 19, 1965

d r i l l core, 37 were por t ions of the contents of v i a l s of ro tary cut t ings samples, and 5 were rock chip samples from the small outcrop in the NE~of Sec. 35, T.5S., R.5E. D r i l l hole mater ia l was sampled with the in ten t of hypo the t i ca l l y s t r i pp ing overburden from the bedrock and hence, samples were genera l ly taken from the in te rva l j u s t below the assumed depth to bedrock. Chips from diamond d r i l l core were considered the prefer red sample ma- t e r i a l , and when the assumed contact between overburden and bedrock had been d r i l l e d wi th a rock b i t and a ro t ray cut t ings sample taken, a chip sample was f requent l y co l lec ted from the f i r s t run of core below th is po in t . Many of these chip samples displayed v i s i b l e m inera l i za t ion in the form of oxide copper or p y r i t e and/or cha lcoc i te . The p r o b a b i l i t y of anomalous, and hence meaningless, values for copper in these samples was rec- ognized at the time of t h e i r c o l l e c t i o n , but they were taken with the thought that they might con t r ibu te something to the d i s - t r i b u t i o n pat tern of molybdenum.

Samples were co l lec ted in small paper cans wi th a to ta l volume of approximately 137 c c . Rock chips from diamond d r i l l core genera l ly represented roughly a lO- foot in terva l i f that much core had been ava i lab le , Rock b i t cu t t ings samples were genera l ly a composite of a one-hal f s p l i t of from one to three 15 dram p l a s t i c v i a l s , each represent ing a lO- foot in te rva l of rock b i t d r i l l i n g .

ANALYSES

Seventy-s ix of these samples were analyzed fo r trace amounts of copper and molybdenum by our laboratory in Sal t Lake C i ty . A copy of the resu l ts and Mr. Har t ls l e t t e r of t ransmi t ta l descr ib - ing the ana ly t i ca l procedures is attached for reference (Attach- ment A).

EVAL UAT I ON

I n i t i a l l y , the character of the sample i t s e l f should be considered. The chip sample from core is , whi le genera l ly represent ing from one to ten feet of rock in a v e r t i c a l d i r e c t i o n , extremely l im i ted or se lec t ive in a hor izonta l or areal sense, Rock b i t cu t t ings samples, p a r t i c u l a r l y from the e a r l i e r holes, are subject to vary ing degrees of contamination and the in te rva ls sampled are based on assumed depths to bedrock,

However, i f these reservat ions are disregarded, the absolute values c o l l e c t i v e l y r e f l e c t a weak regional background and local threshold. When p lo t ted on a plan map (Attachment B) and considered as an aggregate, the values tend to exh ib i t a poor ly defined pat tern of weakly anomalous areas which are crudely co r re l a t i ve to those areas of higher concentrat ion of base metal as developed by C. J. Orback from d r i l l hole data in September and October of 1963. The

Mr. Courtright -3- January 19, 1965

variables involved in the materials sampled preclude valid contour- ing of these weakly anomalous areas, so they are only roughly outlined for purposes of c la r i ty ,

Aggregate plott ing on vertical cross sections and segregation of samples into dif ferent catagories for plott ing on either a hori- zontal plan or vertical section reveals no additional signif icant relationships or dispension patterns, Results as a whole are seemingly in t r ins ica l ly non-definitive. A l l s t of the samples analyzed and their characteristics is appended (Attachment C),

NPW/jak Attachments - 3

N. P, WHALEY

R. ~1 LACY CH;EF O~*~PH T S. ICIST

- A M E R I C A N S M E L T I N G A N D R E F I N I N G C O M P A N Y ~ £ O P H Y S l C A L D t V | S I O N

3 4 2 2 S O U T H 7 0 0 W E S T

SALT LAKE CITY, UTAH

Hay 20, 1964

8 ,

Hr. N. P. b ~ a l e y American Smel t ing and Re£1ning Company 813 V a l l e y N a t i o n a l B u i l d i n g Tucson, Ar i zona 85701

GBOC~O4XfikLROC[S4MPLKS COPPKR-PlOLYBDEHUHANALYSIS SkC~T~PROJECT .....

Dear Hr. Whaley:

We have nov comple ted t he a n a l y s i s on t h e samples which you s e n t us . I am s o r r y t h a t t h o s e took so lonK~ however~ I nov have h e l p i n t he l ab so I hope t h e s e d e l a y s a r e now a t an end .

These smnples r a r e p r e p a r e d in t he s ~ m d a r d way. The 8 a m p l u were f i r s t c r u she d and p u l v e r i s e d to an averaBe -80 mesh s i s e . Then t h e samples were s p l i t , o n e - h a l f beLu8 r e - b o x e d f o r you and the o t h e r h a l f t a k e n i n t o the l ab f o r a n a l y s i s . In t he a c t u a l a n a l y s i s , o n l y t h e -80 mesh f r a c t i o n was used .

Each sample v~s f i r s t ana lysed f o r copper ustnS the s tandard Coral copper techn ique , p y r o s u l f e t e f u s i o n and a determ~nat£on us /~ 8 2-2 t B £ q u i n o l i n e . Blanks ware l ~ e r ~ e d s t ~ u i n t e r v a l s and no c o n t a m i - n a t i o n was e n c o u n t e r e d . Va lu i8 r a s e d f t ~ a 12 t o 10,000 p a r t s p e r m i l l i o n .

A second run was t h e n umde f o r t he molybdenum m ~ t l y s i s . T h i s aBa~n i s t he s t a n d a r d method~ employ tn8 a c a r b o n a t e t ~ J t o n sad a molybdenum t h i o c y a n a t e complex lu ~ p r o p l l e t h e r . Blanks were Lnse r t ad a t r e s u - l a r i n t e r v a l s - a l s o s e v e r a l knmm v a l u e s wore a l s o jddod - and no con- t ~ i n a t i o u was e n c o u n t e r e d . Values r anked from 0 ¢o 60 p a r t 8 p e r m i l l i o n .

The e n c l o s e d l i s t s i r e s y o u r ~ I p l e number and d e s e r i p t i o n ~ p lus t h e copper and molybdenma v a l u e s in p a r t s p a r - m I l l l m a . I f you have any q u e s t i o n s , J u s t drop me m l ime .

0 ~

Mr. N. P. Whaley -2- Nay 20, 1964

A l s o , u n d e r s e p a r a t e c o v e r , I am s e n d i n g o n e - h a l f o f t h e t o t a l b u l k o f each sample back t o y o u . T h i s box a l s o i n c l u d e s f i v e mamples w h ic h J i m S e l l s e n t us .

I would be v e r y i n t e r e s t e d i n y o u r c o ~ n e n t s on t h e s e r e s u l t s com- p a r e d t o y o u r e a r l i e r s t u d l s ~ . I have found y o u r e a r l l e r r e p o r t s v e r y i n t e r e s t i n g . H o l y mos t c e r t a i n l y a p p e a r s t o be an e x c e l l e n t i n d i c a t o r f o r p o r p h y r y c o p p e r s . Do you have any s t u d i e s wh ich can g i v e a r e - l a t l o n s h i p b e t w e e n t h e amount o f molybdenum f o u n d a t t h e s u r f a c e and t h e a c t u a l amounts a s s o c i a t e d w i t h t h e c o p p e r o r e ? I u n d e r s t a n d s ~ f n t e r e s t i n g ~aCm £s beLn~ d e v e l o p e d a l o n g t h i s I L n e .

DHH:ao EDc.

I t £s my hope t o do sow~ work i n t h e s o u t h w e s t i n t h e n e a r f u t u r e w i t h B i l l $ a e g a r t . I s h a l l l o o k f o r w a r d t o m e e t i n g w i t h y o u and d i s - c u s s f n & some o f t h e ~ p o s s i b t l ~ c i e s o f g e o c h e m i s t r y i n t h e s o u t h w e s t a t c h a t t i m e . I n t h e meantLwe, ~f I o r t h e I a b c a n be o f any a a s £ a t m n c e t o y o u , d o n ' t h e s l r ~ a t e t o wr~ teo

c c : R. J . L a c y , w / e n c .

Sa~LZ NO. , OOC-$- i Outcrop Summit

: 50-1339.5 62-1492 70- (1390-1400)R 53-1110 Outcrop (S) 15- (570-580)P. 66 - (1260-1270)R 23- (420-430)R 5 - (1270-1280)R 21-(240)R 26- (100-I IO)R 14-252 54.-} 95g 1 6 - ( 2 5 0 - 2 7 0 )

• .- 17-835 42-1828

i~ 43-281 4-574 79-1077 13- (130-140)R 41-1197 72-1825 55-1753 68-1024 59-1777 14- (243-250)R 10-233 12-125 35-6,86 78-1708 9-393 Outcrop (E) Outcrop (N) 33-2030 3 - (1710-1720)R 39- t832 74-(710-780)R

P ~ / C u

75 75

1400 75

1200 • 50 50

200 37

!O0 125

50 ~O0

75 300

3OO0 1200

50 800 50

900 4500

75 25

60O0 1800

250 • 200 " 75

100 400O 1200

50 100 3O0 25 300

50

Pt~/Mo

4 .0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4 .0 4 .0 ~.0 4 .0

4 .0 4 .0

12.0 4.0 4.0 4.0 8.0 4.0 4.0 8.0 4.0

48.0 4.0 8.0

~2.0 8o 0

8.0

0 4 .0 4 .0

0 0

GOC-S- 44-1923 58-1460 22- (60-70)R 61-(I010-I020)R 6-276 31-941 .85-2032 65-1280 1-16 Outcrop (W) 67- (1130-114O)R 37-(1020-1030)R 36-(IISO-IIgO)R ~-(~36o-~3s0)R 2-~4z~ 30-(100)R

,, 46-104 69- (I 350-1360)R 24- (680-690)R 7-355 64- (1050-1060)R 52-2043 8-214 17-(53o-54o)R 18-1098 63- (980-990)R 19- (120-130)R

:29- (590-600)R 11-406 25-(8o-9o)R 20- (210-220)R 49-1510

" 5 7 - 9 ~ 38- (110-120)R

~-51-65 32-(1710=1720)g ~,6-(~sgo-17oo)H 76-(sxo-s2o)x

Fm./c~

2 5 10,000

50 100" 400'

1000" 50 ~

tOO 25 25" 25' 50" 150 25"

3000 1600"

25~ 50'

100' 4000-

50" 100, 300 . 500

25 ' 25.

2 0 0 . 150, 450 ~

50" 75°

900 ~ O*

600- 25,

300 • 50 50.

0 60.0

0 0

8,0 4.0 2.0 2.0 4.0 8.0

0 4.0 4.0

0 16.0 4.0

0 4.0

0 4.0

0 0

4.0 16 ,0

0 0 0 0

4.0 4.0

0 0 0 0 0

4.0 0 0

.~. ATTACHMENT C

Sample No.

GOC-S-1-16 S-2 -542 S-3-(1710-

i 720) R S-4-574 S-S-(1270-

1280)R S-6-276 S-7-355 S-8-214 S-9-393 S-I0-233 S- l 1-406 S-12-125 S-13-(130-

140)R S-14- (243-

250) R S-14-252 s-I 5- (570-

580) R S-16- (250-

270)R s-I 7- (53o-

540) R S-18-I098 S-19-(120-

130)R S-20- (210-

220)R

GEOCHEMISTRY SAMPLES - SACATON CORE AND

Sample Type Core Rotary

X X

X

X X X X X X X

X

X

Ana I ys i s Mo Cu

(p_p_m._) ~ (ppm)

4.0 25 16.0 3000

4.0 25 4.0 800

4.0 |00 8.0 400 4.0 4000 4.0 300 8,0 1200 8.0 200 4.0 450

12.0 75

ROTARY CUTTINGS

Rock Type

GF Mp

Porph (?) Mp

Gr(?) Mp Bx Mp Mp Bx Mp Bx Mp Bx Mp Gr

x 8.0 900 Mp Bx(?)

4,0 250 4.0 400

Mp (?) or Gr (?) Mp(?) o r Gr(?)

x 4.0 so Gr(~)

Remarks

Capping Vis ib le sulfides

Uncertain (rotary) Sulf ide w/wk leaching

Uncertain (rotary) Capping Vls ib le py-cc Capping Capping w/ox Cu Capping Capping Capping

Uncertain (rotary)

do Capping w/tr ox Cu

Uncertain (rotary)

X 4.0 300 O.tz. Dior Porph(?) do

Mp (?) or Gr (?) do Porph Bx Capping

16,o 500 0 25

X

X 0 200 ? Uncertain (rotary)

X 0 75 Gr (?) do

Sample No. Sample Type Core Rotary

GOC-S-21 - (240) R S -22 - (60-70) R S-23- (420-

430) R S-24- (680-

690)R S-25 - (80-90) R 5-26- (iO0-

IIO)R 5-29- (590-

6oo) R s-3o- (i 00) R s-31-941 S-32- (1710-

i 720) R S-33-2030 S-34- (I 360-

1380) R S-35-486 S-36- (i 180.

1190)R S-37- (1020-

1030) R s-38- (110-

120)R S-39-1832 S-41 -I 197

S-42 - 1828 S-43-281 S -44-1923 S -46-104

X X

X X X X

X X

X

X X

X

X X

X

X

X

X

X

Anal ysi s Mo Cu

,(ppm) .... (ppm)

4.0 125 o 50

4.0 37

0 I00 4.0 50

4.0 50

0 150 4.0 1600 4,0 1000

4.0 3O0 4.0 300

0 25 8.0 i00

Rock Type

Gr(?) Gr (?)

Mp(?) ? Gr(?) or Mp(?)

Mp (?)

Mp Bx(?) Gr(?) Gr & Gr Bx

? Mp Bx

p6 Gneiss (?) Gr Bx

4.0 150 Gr Bx(?)

4.0 50

0 6OO 0 300 4.0 4500

Dp

Mp (Z) Porph Gr(?)

12,0 1200 Mp 4.0 50 p6 Hera Gr 0 25 p6 Meta Gr 0 25 p6 Hera Gr

Remarks

do do

do

do do

do

do do Capping w/ox Cu

Uncertain (rotary) Uncertain (Tcgl or

Uncertain (rotary) Capp i ng

Uncertain (rotary)

BR?)

do

do Sulf ides-diss & fg Capping(?) or Tog1(7) w/ox Cu Capp i ng (?) w/py Fresh Meta Gr do do

!a,,

Samp i e No. Sample Type Core Rotary

G00-S-49-150 S-50"1339.5 S-51-65 $-52-2043 S-53-III0

S-54-1959 s-55-I 753 S-56- (1690-

1700) R S-57-948 S-58-1460 S-59-1777 S-61-(1010-

1020)R S-62-1492 s-63- (980-

990) R S-64- (1050-

1060) R S-65-1280 S-66- (1260-

1270)R S-67-(I 130-

i 14o) R S-68-I024 S-69- (I 35O-

1360) R S-70- (1390-

1400) R S-72-1825 S-74- (770-

780) R

X X

X X X

X

X

X

X

X

X

X

X

X

X

X

X

Ana 1 ys i s Mo Cu

(ppm) (ppm)

0 900 4.0 75 0 25 0 I00 4.0 1200

4.0 75 8.0 25

o 50 0 0

60.0 10,000 48.0 1800

0 I00 4.0 1400

0 25

O 50 2.0 100

4.0 200

0 25 4.0 6000

4.0 50

4.0 75 4.0 75

Rock Type

Gr Gr(7) Biot Gr Gr Gr

p6 Gr Gr

Rema r ks

Gr (7) Gr Porph Gr

Gr (7) Gr & Porph

Gr(?)

Gr(?) Gr

?

Gr(Z) Porph (7) or

Gr(?)

Gr(7) p6 Gr

X 0 50 Gr (7)

Gr(?)

Capping w/ox Cu Capping(?) or Tcg l (?) Fresh "Cool idge"(?) Gr Very wk=ly a i t l ed p6(7) Capping(?)-wkl ly al t=ed Gr Bx p6 Gr and Gneiss Capp ing (?)

Gr

Uncertain (rotary) Biot Gr w/hm on fracs. Sulfide w/py-cc & hm Sulfide (diss py~cpy)

Uncertain (rotary) Sulfide Coy-cc)

Uncertain (rotary)

do Below ox zone (no min obs)

Uncertain (rotary)

d o

Capping w/ox Cu

Uncertain (rotary)

do p6 Series w/ t r ox Cu

Uncertain (rotary)

~w

Sample No. Sample Type Core Rotary

G0C-S-76- (810- 820)R

S-77-835 S-78-1 708 S-79-1077 $-85=2032

X X X X

X

Analysis Mo Cu

(ppm), (ppm)

Rock Type

0 50 Gr (?) 4.0 3000 Gr 0 4000 Porph 4,0 50 Gr 2°0 50 Gr

Remarks

do Capping w/ox Cu Capping(?) w/ox Cu Capping (no min obs) Capping(?) (no rain obs)

SUPPLE_MENTAL SAMP.LES FROM OUTCROP [-N .N.E~ S EC.,..... 35.,, T.5S., R,5E

GOC-S-OUTCROP- (N) Rock Chip 0 ! 00 Gr S -OUTCROP- (S) do 4,0 50 G r S-OUTCROP- (E) do 0 50 Gr S-OUTCROP- (W) do 8.0 25 Gr S-OUTCROP- do 4.0 75 Gr

(SUMMIT)

Chips f r alt=ed Gr do do do do

L

-< .7'

lucSOr~ AP i:~r~-

t2o ~ r ~ y - ~ , • . . . .

D

S~aten Prospe~¢

$ i .

~ef~renc~ is ~de to Hro 5a~g~rtS~~ m~orand~ of~$eptsmber I to ~r " L~Cy * a ~ h ~ s COV~r ~ ~ t ~ ~ e r r ~ a r d tng ~ r~S~'~ tS " orf t ~ thOrO U~

In the $~C)tOn ~rea, and :nc|ud.,ng their r e c o ~ c t ~ t i o n s o

$ ~ g a r t concludes that the ~ r e a o f . i i~fcatsd slgn|ftc~rJ't sulphide minsra~iz~tion Is li~l'~ed to Zone A an~l is rather smt~tt in ~re~ (2800 e by 3500'} . Tl~ugh s ~ t ~ , this ate~t s t i | ) i s l~r~e c~ough to contaln an ore b o d y . b t r . C o u r t ~ t ~ h l : ~ n d ~ rec0~end Six d r i l l holes as ~ mln, imum test . The pos|i;]ons b~ thr¢-~ are s~0vm on Lhe attached map ~ i c h |s a

'Proposed d r | ! } hol~ |o¢~t|ons A, I)~ and C ~re w i d t h the a r e a of highest I . P. r~spons~. These three ~ re r~th~r close'spaced, the re~scm b~in~ th~.t one or_ t~o ~ | ~ s ¢ ~ ! ~ be ~ is l~adi~g ~n ~i~m~. of ~.verage

• !~4~i./~eil t. " c o p p e r C ' . . . . ~ • o -

Local:ton II i~s inte~.d~c~ ¢s~ t~s¢ Zone A ~|~ng I ts ~ppare~t s t r i k e .

L 0 c ~ t t ~ E IS ~ i t~ l :ed outSi~e of the a ~ o# S|g~t f ica~t s~iphiites as described by Sitegarl:. '~Thls hole is intended to deter~Iine ~liether Cha s o u ~ e r | y ~ r ~ t ¢ )n I , P. response ~ iS dc~e ~ dl~inlshtn~ sulphide c ~ t ~ n t ~r to ~ ~:ther ~eotog|¢al c o n d | t l ~ such ~s i te~ !e~ching.

Loc~tion F :in Zone ~ tF~lt)s In t ~ ¢~¢e~ir~ Of "JuS¢ ~ be sure". In tl~lPS regard Hr, Sa~!l=irt says that , ~ l f a suIph|de source e~ is ts , ttle su|p;h|de ~ t e n t is ¢oo S~ I1 to be O~ interest. , , This states, he ts e~tlre+l'y ~ r r e ~ t fo~ ~ S l d l s s e i ~ l l ~ d deposits, but Cher~ ~re eXCP.ptlO~So

a~ e~ample, d l s s ~ l ~ t ~ , ~ r a l t e ~|one can constitute ~re¢ven thcmgh Chec~etlcalty the 1. Po response ~u1~ be 1~,~.

~= have a s s ~ d an average depth o f 50!) e - for t~ese s l~ hOles. Aciuai ly, this wail vary i!epe~t!-ng on the .Str~gth of p r i o r y t l n e r l ! l - ~ t i O n f r ~ hole tO. hole.

, _ . . -

t~s e S t i ~ t s t h e i t r i l l i n g c~st per foot a¢ ~9.SO~ in liiding ¢ontr~¢l~ costs, s a ~ l l n g , assaying, Sttpet~lia|ng, etc . We are p i ~ l n g tO purchase

:r

~

i t '

~ ~

used ¢ r a ! ~ l e r f rom t h e t t l | s $ | @ ] r l ~ t r a e l t ) t ' - ~ ) s w t l l b e used f ~ r f i e l d ~ r e $¢~)rager ~ that: ~ persons but :our samplers wi l l see the core.

1 1

Try| %~e; - : . "

,¢~ga:i - , . -

$ 2 8 , ~

, . _ , - , , ,

i f you ~ g r ~ with ~h|s p ~ r ~ m ~ d ~ : p ~ e ~ ~ t ;.~u@iiorl~t|on

l ~ a separa~ ¢~ te~ry . Conse~ent~!y~ i~h~ ;above ~o~:al, does no~: |n- clude ~ney f:or ,~ny ~:rl¢ Chat ~ Igb¢ be ~ e ~ p ~ l a ~ d i~, that area.

, . , . , . . . oo , ,~ : . . ~ ~ be ~,o, , , . , .o. ,o ,,,.o,, oooo. , ~ , o ,,o,,..o

1

7 k

k

. ,

. . . : : ,

h -

J

• • • "/:'.1 T.

i ' 7-: -

" t > '"

• . t -

O ,/ ..... e'* .....

"f 7":~" ~ --

" ":~:~physieelDi~.lei~ ;: ' :~ .... ~ .

- . . -~:~, ."

: b

$ ,"

A. C. '~.

SEP I ~ 196~

~, ' .~: '~ . . . . . ..... i .. -~ ...... ~ ~. ' . ~ ~ - ~

d£c~ed ~h~ We ~h~.ul.~'no~ ove~l~ok ~ y p~Slbili~le~ ~d

-- , - - . ,.~ -. , . .. ., "-.,. " - .~. -

T~.~

v

£

Sgp S 19.~!

TUC~o N

J GEOPHYBICAL DI%~ISIOH Salt !~ City, Utah

September 6, i%1

T.

~. C. P. Pollock American Smeltir4 and ~fim.ing Co. 120 Broadway N~# York 5, N.Y.

Dear ~br. Pollock: GEOPLrfSI CAL EEPOET Sacaton Prospect M,A, 880 Pinal Co~t ~rizon~

A copy of ~, W, E, Sa~gart's excellent~ concise repozh on ~%e subject zatter~ dated S~ptemo~r l~ is enclosed, I ~ee in general ~[ith his conclusions and recommendations as fol!o~s:

(i) Drill within the 7 m.v./v, contour (s~ attac~hment A) on Zone A in sections ~6 and 35.

dz~ll~r.g is yec~-'men~ed in Zones B and C.

(3) No ~ther property acquisition is necessary in the Sac~to~ area°

• ~ • t- (4) Dril_irug of the Zone A an(~maly can be initiated without consideration of ti% ~ , Zone D (Casa Gr~ude Project) anon.

I should like to ms/<e s~e ~If~ing renarks concerni~ points 2 and 4 above. The negation rec~znendatioa in 2 most likely represents the best interpretation of the data~ wD~ich is very good in the $82&ton 8/e~, ~'his is really continient on the res~)!ts of ~i!llng on Zone A~ ho~.¢ever~ in t~t the copper sulpDide/p}Tite ratio is import~%t in considering the sisnifi- c~nce of total percentage of stdphides, In our p&st expeziences in the South° west U,$, the I,P, depth probe curves ~t Zones B and C do not indicate sigu~ific~nt qusi%tities of suIolddes~ bu/h strong scconderv e~ic~ent could increase the copper sulphide~yrite ratio in a lo~ total sulphide percentage en%~iro~ent.

~. Saegs_~t has such strong evidence for his negative conclusions concerning Zone D (Casa Gr~ude Project) that I support his reconunendation (4) to drill Zone A without consideration of Zone D. Although his pending report on the Casa Grs~nde Project v!ll be negative~ I would rec~end some dri!!ir~g and I.P. logging in this are~. The intensity of the I.P. response is far beyond sa~y obtained by us - or by ~yone else ~ far as w~ kno-~ - for a non~mete/3_ic or ncn-~aphitic mineral~ extraneous po!arizing medium, Tkis might a!~pear academic~ but ~ should analyze extraneous restdts - es~ecia1__ly in this ki~ !,P, inte~mity r~u~e - in order to devise teclhnlques of e!iminatin~ thou by instz~zenbation or inte.~retationa! tec!miques,

Mr. C. P. Pollock - 2- September 6, 1961 -

c-"

It sho'~Id .be noted that the reliability of interpret~tlons of the mobil~ I.P,-m~_~tic-resistivity sur~y re~alts ~has been incre~,~ed appreciably by the addition of th~ seismic refraction survey results (see attachmmnt I). In addition to indicating the depths to bedrock: the sei~nic data also s ~ug~sts its nature.

Very truly yours,

R, J. LACf

RJL:th attach. ec : K.E.Richard

T.A.Snedden / A.C.Hall A. G.Blucher/J.E..~innlson W.G.Farley

t

Y

,~. "

. .%. - ~

£I, --~ . .~ ~.~

~ .... "~'~.~-~ . . . . . Z O ~ $ t4--gr~ ~ ~ ' ~ { ~ . ~ ~'~' .~,~ ~ , ~ o ~ - ~ . . . . = | h ~

• ~ ~

~ 0 ~ "

41

q

~ - ~ " ~ ~ - ~ , ~ ~ / ~ . ~ i . . . . : . . . . . : . . . - i . . . . . . _

. :~_~ . . . .; ,. ~ ......

• - . - :

• . . ~ , . ~ ~

A~RICAN Tucson

O SMELTING AND REFINING COMPANY

Arizona February 13, 1961

MEMORANDUM FOR KENYON RICHARD

SACATON PORPHYRY COPPER.PROSPECT Casa Grande, Arizona

Aa-i6A: 3.19B

!

A previously unknown porphyry copper altered zone surrounded by alluvium lies 5 miles northwest of Casa Grande, Arizona. This prospect, which we call the Sacaton, was discovered February 9, 1961; we suggest that it should receive immediate Company attention, as outlined in Recommendations below.

In t roduct ion

The exploration staff of the Tucson Office have frequently discussed the geometrical alignment of alteration, intrusives, and developed porphyry Cu mines along semi-continuous "belts 't striking N-NW, and NE to east. This has particularly been emphasized recently in our Poston Butte-Blackwater and Mission-Amole exploration activities. These zones are shown in generalized manner on Art. A. The Casa Grande vicinity appeared interesting because it lies on the Poston Butte zone, near the intersection of the Silver Bell zone extended NW, and in particular because in this area there was thought to be a large expanse of shallow-covered pediment.

Another lead into the area is found in a reference in Company files to an old water-well churn drill hole on Potts Ranch (year 1919), which report- edly bottomed in 6% Cu from 460-487' (letter from K. S. Twitchell to Goodwin, August 6, 1941; and following correspondence). Unfortunately the hole was not found at that time (1941), and our present reconnaissance suggests that if it was present in the reported locality it has been covered and obliterated by flood plain silts.

Blucher initiated reconnaissance of part of the Casa Grande vicinity one day a month ago, and together we scouted the area north of Casa Grande on February 9, 1961, resulting in the discovery of a positive lead."

Recommendations

The only altered outcrop is Small Hill, separated from unaltered rocks both on the north and south by about l I/2 miles of alluvial-covered plain. This is a featureless desert flood-plain area; the Casa Grande cultivated region lies a few miles southerly.

At t . B shows the possible ou t l i ne of an a l tered zone. We propose that in this area a preliminary property investigation be started as soon as possible, with the expectation of following this up by I.P° geophysical sur- veys and claim staking, in whatever order seems then most appropriate.

!

I

Sacaton Prospec t - 2 - February 13, 1961 i " • • About 3 f i e l d days wil l be requi red to f i n i s h the geo log ic r econna i s -

sance. This is planned in the immediate future.

The Prospec t

The rocks in the Casa Grande area consist of the Tertiary Coolidge granite, coarse-grained granite, Pinal schist, and a post-ore conglomerate of Yellow Peak-type (refer Blucher's Blackwater report, I£60).

The Sacaton prospect is shown on Att. B. The single outcrop of altered granite is a little hill only 300 feet in diameter, sur[ounded by a large alluvial plain. To the north 1½ miles the Sacaton mountains appear to be fresh or but weakly altered. To the SE 2 miles Pinal schist crops out and is una I te red.

An examination of well logs on file at the U.S.G,S. in Tucson yielded certain information on the shape of a pediment cut on both pre- and post-ore rocks (Att. C) south of the altered area. There is really no basis to aid in predicting the depth to bedrock within the target area, but it is probably shallow; 200 feet or perhaps less.

The rock on this small hill is pervasively sericitized and kaolinized granite, containing limonite after pyrite and traces of "live" limonite. An altered porphyry dike cuts the southern slope. The original total sulphide content is estimated to have been about 2%.

Although the capping exposed on this hill does not suggest that ore lies directly beneath it, it may be the pyritic portion of a larger porphyry copper deposit -- another which lies along the projection of the Poston Butte-Ray mineral zone.

JEK, AGB/ds

ARTHUR G. BLUCHER

mining records curator arizona geological survey tucson,...

Documents