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06 5283-Report on Regional Mapping, Western Tasmania1957-58 Season

Rio Tinto Australian Exploration Proprietary Limited·Solomon, M.

RIO TINTO AUSTRAUAN EXPLORATION PTY. LIMITEDMELBOURNE. AUSTRALIA

PROJECT:- PRP/7/100

JI

REPORT No.:- Miscellaneous/1958

REPORT ON REGIONAL MAPPING, WESTERl-r TASM!lNIA

1957-58 SEASON

by

M. Solomon

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FILE REFERENCE :- 8D/20

MAP REFERENCE:-

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DATE:- 4/12/58

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llIY: • S nox •c Jro

a LLt 14-

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'. kd1 • c ently in: 0five

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(0) •••r •( ) en of ~...(.) D 11o

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to

Ptxlnao1e.1; po b~

J1 dr.ll

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•

Ym,.nlea

rae

no

cell:ll1'1 atocoMPaI!l1:-.Pe%'lll1Pe'na;lOlWo ov101an

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•

fhe be djuri ..crl 4 111(:0 1 rate.

yroolaaUo royulyi en

"'6,u...k

o plat.au an n n tare • 1.7 different on-

e-.:su,u f.li1par po ~"t II1U­rptqr1•• (keratophyre_), et •

•

1 ' -:m..quartll1 •• co 1 rat••thin ••ba1••

ltat •lIlUSAlalt,ou.

_U1Gell1 • (1) Wi '--

5000"

250 'T600'1

1500'1

700"'f

81yeoloan1o. 15 't

~1.01l.rate ~ ••• ~ al..

h of t n.rn part t tb8 ••0 1 pro bl)'1. equ1"al.ant to the eHlt. 10n.

- 6 -

U. 0..81 1Jl t nnU line 1. "'11>10al.-

~ar•• OWen 0 1 rat-.

A f.w f ••t of ark Uown 100 ~ lIhal•••

with Onn.

ftlWa°ke1 NUl

J .f2'_" q ao.. ertt.

lvrt•• 0 t. DIm.Qa

7181 work .ug.'Alao1•• oocm:r. in the n

.~ 1.IYeU rather 81J111ar be48~=:ra~te. he faoi.. no _1.....~~IUIU;IU4 u81 a arti ulu' e •.

o.blI~clt.n"1et 1. t.LOl:=&l.;L". ro~'\JU..

p~Ilo-C'l:lIbn

, folloW! aucc 1I10n• 1 f1.l Il& a-

r Onu.

be WI

............... I

-7-

r nl

In_ion wu to

~~ fa1rl.Jr;..MPi~mii18l1mr1_h in colour.a~ t oren of trapi t_10 •

Irl:lldto ,......,." or

!NIX14.to~le 1... 0ta1r17

• nortMm

at i.

UIII."" U.L:LJ:: x •

...

ide:nt of

I •

- -fbi• .,.ne,. later beclalle t IJ1te

ben).a epre 0

__JR.'. of C%'O••

01'Iu.1;1on are exl>oe,_o,aret,

•

• J0te..,at el'll&1ahale.

an. 1. ",IQ

en. 1flank of

v ..............-.• ) \

Ot l' orobut are of le."1' ".P:Y..J.

OOOllU' in•

-9-

~he tol north of Ooa~oc 1a oUi ra If.nUe than that to "he 0 th an U1.a1 p1aD. II are

P':re'tlOlItUlI8ll:tl, .Jr.W. The re IIU dued.t tur.. pointo ..alter ain ru1.-tion.

!be at prOJl1nent :t014 b the fyndal edp10ltlcUne Which atrike. Jr... • :parallel to the do nant

trend in t eqnolt 'l1rObi.on uea. 148110. hu be ng1.,en ",0 in ieate 8~11 etirr1ag. ot thi. fold in "'heOr ovicte.

(0)

portioc•••l

rtioular importance re 8 attache 0 t..litem I1n ot 'the 1?re-C&lllbrtan r OU and eztene1oni1 tot • Tllllah 'III1neral1e.'tion.

A. large ~a ea.t of • 1U' biaon and 1nolu41t. .urohillOn 11"er orae ere prone a4 i

to 1 lro pari ea and rema1n to be e _4.

If e follow1llg fiCc...ion ellta U.he over afew quare· )..a. at of z.ke . Una, 1 ly b1 tra.,are1nBporiiona of the Anthon, iTer and 1t. tr1butart•• 4rain1zlgth 1cht a.-

Qaal'tll febpar porphJr1••porphyr1eD, :!a1rly tineare1 in colour.

2. Limt1oula:r, trom nrc tSl'e1 0 led e.n4no~-......poorly" ••

,. 1JlI1lar porphyria. to 1,0.200- tbi k.

4. mi1er quarla1t. to 2, overly1coaree Jdlic.ou.a collilomerat., thetwo varyi from _ro to 6-700' th:lc ,but fe1rl1 p8r81 t.nt 0 .ellt flankof tioht •• Co 10 rate 1Ja1larto facie. but par p. ore 11111.01f1a4.

1.

n!!:::!i~;mbtm. 5. Dark bIll -bla It .hale.,. are, quart•.,8ina • in lu41 looal len••• of "hi 8quarb1h, t1P10all1 Pre-C br1an.

6. ta or "1 q\lal"\••ohi t .be1Ut'edqU8rtaita•• axten41 ...t acZ'O" theCentral lateau.(In41T14ual tb10 .• e. "ars cone1 erablyand are de on ad in fieJ.d book and onphoto.) -

!r Owen like faci.. d••enbe 1n the roupen 14enUf1e .. OrdOVioian (. en to tion) by

Dr. a work1ng • of lake 011811 on thi8 inter-pretati involvea consider ble faulting.

- 1 -

0') ."'IV q 111 ••00 1'&10••,

t • ...-tun aJ~g1;n of the 0 a Yalu1, tanon 1... toll .-

1. r..nUoular (tno ••

probably n.

2. "1 an 01 quana an t.1Jspar po lqr1.•••lean. 11ttl. 01' no •• :tar)' ..t.rt •

10'+. pelt 11 (uarta) • 1.1II'D1D"e • 0 •

1 ' I saarin :01llp p~h1r1, :tber1ncn

20'+. altarnat1. quarhite,ql rata••

A ••CUOll ... 1'Wl al the ri1 tpbia 1,..1' aDd re••al t fo lo1d. 1-

6. .1ltarnati orpb1ri••, tutt. a:r.bale••

5. Coare., mue1••, D fa 8P •4. Th1lll: b4l a 1 (luarhit ••

1 .ha1ey bed., onton..roup ,. oor11 0 t 1'OJ)p •• e18}l&1'

orpb1r1•• (,).2. 1. t1 11 _140:4

wit t n quanstt••, 5 0' ~LU5.

1. !JP1oal br1 e1t••

At t JIOl't aere.k, alpham1.1,.. 81t. , are

C uartlS1tea b1 .lac

...1 r.ofttarn Kin of the P brian ollt or

Ta:r1ab a ...lti.,. of .111e 0 I' 1t ••~';l.11it.. aD .oloame., the II1UceoulJ I1CII:lbeapp or ••rs aill1lar to en a d1 n ••wit the 11 ince of • (1954) in h IJor....narea ere al 0 " or • 1JI a u.1Jto

.. rock••

-11-

hi. area •1 four &eol 1ab in to r1 UOA npr... • t

k iTer an'. .ton•••

ov1oi.an. ton • atOM in the hi. Talley•

OtN,n CIDIlfl:lOZlleh ••·-:~O:°::·i·....'~ Cc .a.

Oi:I1~f81reD .,nt.a.

J .a 0

br1 • .&I\A,I;1a." 1'0 p. (ot in athtJ.&lrllll'b1

~arre11 Tol ca.

1')&-

t.r11

it••

volcani •

A f&1r1]' 00Vel' 80 h of Tu1lah•

l.t.

... 0 torop at 0 the Lwrc1l1aloDlIOuth of I4. U. 11, .n.aQJ~

lll1DII,rali-

•

- 12 -

l.a-y • 18 001'17 ".lop. par el t theDe-'OlUILX1 tol ax•• 1 ••• I ••1.

to

..u1val.nt

u U8trt ion o~ ao1 1 voloanic. within tn ou oro area ~l.nk. by 1 'terae41at. _tartal 18 re-

at at • .qw1ok .0 th al t a to t.Danin.

oo

arrall 1. the onl are whi n th Owtairl,J n••t17 nto 10 thre. 8U 1T181otW,IDnr.

poorly

• 'arr.U, per OWen1 rate., oth un1te

outorop 111111t, t

he rthernlIan atone. o1'ar1&7 Lower ent nn1 to t north wh.n, at t.WJc.,••10n ...ur.... fo110 el-

lS '. nd200', coar••

•ort. •

l:tiM:......l!l~Ui~!2lm, 10M ....., are .. tollo..,-

400', atone••5 ' I co 1 rat•••

OYer the 0 turn of the aountain a ofU:~b.c rate 1_ &11y die bl. ut OTer-• 1'8 v&1'1 fr fairly coar. 0 1 rate t -

II'tt"... _hal.. 10 WIUal 1ohre...~o iviG reaked •

00ur8 only on ttl. a:rrell Lc i 1 rate p tn 700 r •

h. Of arti t. are t.be.bbl.. of tit. near t top 10u paralleU

1 a. • With tbat 1 t. a rian rocu.

thb i. .xpo.. 1n nl7. few rlaoe. in thver, "nJ..y ear the junction th the cldntoeb

te.

f e nru.otuft ~1.. wn 1n • 1 •

'al/<~,..:t. b1 .haJ.low oro..... 01ualU>ll......0 10 fi arrell to I:w:-ob:l.lt(l,.n.

It 18 not1 • 1. that the iitoh thedlMllli1:uree 0 t. :rarnU 1. rt.·1:1 - tor ont

:::.~=l~~:et alla (19 ). u. 00 1'& e.to n a out 1"11 pH •

ion

U a rewlt t 'the tiel 1Il&PP1 •ral ot.nt1 haYe 0 h • .ts.-

•t UX'o.b1.cm iv.r

-14-

(2) the obieon TV

.~~... 1n

(')

eo

.~ 1~"""'·

(1)

(2) T a1neral1nUon t late (• J.. of 1i • be e. aiTe &r1

th1. 1a obY10 17. _301' oonU'oJ. over locGlhat1III1.ne:ral1ntlon.

- 15 -

~t••

(4)

(e)

"elo~nr1ft nllq 1.

auo ••10n 41a-teq we 0 1 OoeJQ.J:. 18 ro bly •• f 11 t-

• 0', •

- 16 -

OU' , ..r V1nIIA co ..o rat•••

2,000'

or • &118 ... pO.

o • 01-a ....~.. .eU of he , t 8

n2,200" per6 ' , !.o..r OWltn--

80uth

in ota oar.. balJ&1...

Wll'a,o n.e, ~b. tu4 10 11 .v-<&.'

• 1l ~n

"or'gaIll-.per.

OUllMci

COIl&l-,e.-ra • 1 t

(a)

.:q~'ltd but t "a:.l.1.UY to •

(1)>) .,:Pl'lt~:ub ...-....w.

her 11,ar •

~.LI&") •

- 17 -

it•

11lY.1It atio 1" ..

oiJUl.ar17 the

41.. app.ar to beu.om

o••ber1.•

l'

• of_c....ef1.14

••t t at

1DDa!l 0 .~ ••nee of 0.1It Cat.

FOSSIL IN DUNDAS GROUP, MT. SEDGWICK

C6rr-1kcud by JIMlo--mo-n -/95cY