BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS. · cop$ commonwealth of australia. ministry of national development. bureau of mineral resources, geology and geophysics. records.

cop$ COMMONWEALTH OF AUSTRALIA.

MINISTRY OF NATIONAL DEVELOPMENT.

BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS.

RECORDS.

1952.82

REFORT Of7 THE GEOLOGY OF h1APlUS I S L A N D Z E R R I T O 2 Y OF EAPUA

A I D -- NEFJ GUIlQ3A, VJITH 9EmREYCE TO TKE OCCURRE:f:CE OF BAUXITE --- -----

JOEo Thompson

D u ~ l a ~ a ~lo$Iarr?. m~ane&&q%nos o f Fsanurit tolnab, tm&lar Mu%%%@+ IcEa w t m a b m m tn 9h8w wl.bQr mttPISttlehS, lmal&t Lap. f la p m a c ~ 9 rtlw, nut Za%ar*erUp em9otad Taro ape U e r L w fm bsrrw'ltio fhwa an3 tDatW 11p irs- orer r lasdhm-~gmd rack prdbiably G4 IDH&~%& Tbsm +olnaMo racks am re&c$~ a t ar carq>am%f,p4@g Pacant vubnlrsm an& fhs?lr c;tnm~e~arr 1 jly O V ~ F Z ~ m a l l - ~crrwrrt4naro and.mrim fiWJC1p-t~ sccdliss8at s dte4 em *or gTu%aads bWQmia% Wls~rrtolagic@l widenos of' the age d t k u r ~ radWantr;a l a X~kiftcat bat i t tr prowble $hat tw am W ~ Q W I J I @C yo'raC)gah The vsXaanirs+ am? arub~Sa~t~~&~daX eF ~ Q C B ~ ~ M I a k o ~ r s;~W~WY atp Aetahtmeb bgr trtrderlflqat swlcr%ub,

ThQl graot~rea of lmwhXtt%d%aa ban bscba mop@ mpldl fhnm u& iadbrtin;: %jt#n% phyeLog i s OM gatmgmphia m n d l f l ~

b hmo been prt;icuMrU tcmbab "n" Pmmnt c o ~ l t l o n e of hiph % ~ c ~ ~ M E ~ ~ J c I hL& m1nfaJU adaQ a e r dmtmgzs am mtm~3i.W . a. Pav*~mble, d 1. mbmble tbrt P d i S i o n o hare grc;varled aino* the vo earnlrs ~ltm la id d o a snb tbbt bauxitisetm lsr et.ira proomdta~* .

~egionsl carosidaslwflonca lug@& *hati thb bawftw w i l l be '~lthbspmdd ~LSBIIF"C~~'UZDCQ~ WQ)F t b l ) web%wn aa~d af th4 telrsnBe me+ ~.poi lkta L a o ~ i ~ t ~ *am o* h m e ~ ~ ~ ra I ~ M W ~ oanma~roaimm of bruxita nodalee a t tb erzctam* ';82i?ly have mt been tcef8d el: &srpCb.

The pem1trr anlalgfirreb a t tndtvidltsal act&tlIeu Pram two ot* the drqpasi&sa #how a hi@ ''8voiUabIa" ahatne L n t e s ~ $ ~ Fta?triat pFo@b&bng tQrt;lhg a t &gtPi;, : ar*Elmr?rrr3y W- tl.,~ wavt, is stmwiy psca~n0agb&

Whnue the ma or islsxmd O$ SOle Achaimltg :Rwp 1 8 , e n c l a w br ~ * t ; t w i a a 3 WJV ai& mu* sad ~ o m l t d a WPM~ a~rb ?4lfMo*. Z 1 n ploxhateAy n~ixtp' (60 mila~a low a d f lfi.tsea 1s) to twWiy ? 2~ P mil#o sf &I. ft i~ J 0 ~ 0 t t ~ l erst and weat

t o wnfom t o 81ss rarrm&e m$rana&oa aP new IEanmr a d !raw , XtrerZratM, f orcatm m r t b ~ n IIIILRI. &f tbe BIankl~rak 4hmhtp1~m,

a

C C"v'" go 8ltLcHI ad ih.1 p.H hallttiw ha+, giwur 8b. lrliR aonoi smb3.e Cf-egks vpjb3+ M ol wrrl a* aPr baa . A# Q W ~ ,it -8 L~map$d &r tbe -&can f awe$ after 5d4mcrur firpa Ugttf MY WT. Oa a8 Q a F ~ ~ t ~ p s b OS Qbt Jbu'lFtrpart mfirsla Nwr2 acd r&r $bmmq to8k war an4 am atiU pr g g a ~ a ~ n Bortrl blr o u n y t t o a b.8 b..a pe&?&atab t b %mn($rat~ on th+ rso8rrf; sldi: W mabarn rrlad of +be Solland and *e aa8 oa Zls#ar 886$ra1 TOjlaM, a nlmd eoml map #bpspr*d fksa Um mdem tarinlad by nnmr

w & + r r m y ( ~ m d ' t l r n ~ r p a ) ~

L-1 mhh&a%ratllve )Laa~rnp&m w e 8% 'icarangm ahia:b f o ~rsr8abML ba db+ M~BIQW r8lll;mWWm lqv wcbcdtrt~)n adre& a t -&, L-m +xcr+llssf &a) mO+r p H iacrjl)j;%&l)r) end Lu frescmantly via%tbd bg mrr#rsrr vwm&

&cLurap#ma peptbUea a;r Zbe 58 also & entimw mb%srll16~.%mtlon OF MICIS,BII p & ? i i ~ & o n # Qslstiow aad plWkW%&oW~ lam -Cf~llkl6r?2 d3o?Q tha c@&*

The ~ b j d af the awb t o Lavewtlgpta r mmP that baurtfs o~aurra& an The a ~ 1 in oi f;b@ aWu&w . S L ~ l l obrou~s lmt f%wab the rhie OCohgL8'b Q# t h e Burem @I? 8!tiirrcal ??emmsrrr &$ W&, Qm lak A,,% E 4 1 P q b l ~ o 3 . m ~ ~ Geniop ~.ao;1.1odet 1k)wm%e4 4 ~ ) tW~A&ai~ i~mt "I M st'

rt.r aukma, n. ind~lrct# t o cordno* a n w m e i r u n n gprologlml mmf d' tb t&nd t o invest Wtct $he Ilu?lbtar and t a aetafnstm t + r o ~ ~ the ~ g o ~ b ~ f o e ~ . t m m oi ttm ~ S U ~ P * a

Ee m8 acoldlrrntr$ kiUe& rrharblr a t i m . thQ1 m ~ y a=@-& Thsr w~iter thdlJ; mUd ttpan t o aut the iwssutlL@*t@&

m r 1

130 P @ c ~ @ a$ eb se~L@tm g@@liagl@S ~nverrtt@tion an the i a t w ~ ma bwn ~ 3 & ~ a g u * niemnw t o tbs ~ X O of the i a . ~ I. m a br ~ s t m m l g , o s ~ m s m ~ olaeut lerTi~l j thuar *Tn tbs Mnairartf Xlllarridla, Wnua csmrmr l o i m&asio meM on tbs north @ad ga~ttk cerwtr ma cow ZtmaEomar fa h a e8& aa& wdi, pasaib3y wttb e- e s ~ e tlrP oUbr mkrs kaJ, the c@rkt~r.~ The sma~~d) of th i s LWaPniafion ta a4mornb

Pie14 cd'fioem of tha .Ic!h&p&tq~~him btm~ ~oi!&aded

p" rorr thmugh the pqp~lartga eartsw mA a i $&$ SrUm nrra h.y mtgu2lgrly *sif aoadal v im- b& pa~le8ntl) 1S.h~

uape,-pulra8cbd bf rrt.ar(llasd af the amtml ratl rr+&am prbtorr tkll tw*

hriw p0sflraz, AsurLosn, oceru Oiun t w g m bfo m#my untta o mtrnrd On fbe er~llOern sad uf f e ieUa& t ttle tr) . P" bcno~n o Bbeir mrdILrLtjr~

8" P

amaalngs rso gleQtad dirrs~W,y en t o $ha 9zf38,W)O mapa by mmfil ab#rm$irsn of talpsgmphiasl Itmt;amr amad4 ~.b+~Crfion and oceaaiax#X pa- and B S ~ 8li t a~dn~b61$~1 T The cceumcy o f t h-8 purr tr carrsk&tlndt within he ra$uf nt8 of s yrelininWv ~ c a n t l . j l 8 8 6 ~ ~ b . Ang mcbfhodtr 6f' ijlYtkXrrtEn%lal mmy ~ t h e h f ban pdos end sapp.r would bs IPpmcttaX o o t . ~ a high OM*? o* rmurat;st war i m c s r r a ~ ~ . Aopr vi&billl&*y and hmtry minr &a the danrr, fars*$ mZd w ~ i a a 4 i g 8 ~ - any p2ane arable Whsd8*

8U mt ~ P F I B P I ~ n t d mtttve paXt~me111: WQQFB~~~LL$(LEI, the w ~ i t a r throughout tlw mmy, T ~ Q p#Wy laff T,orerrn#pu on 18th 1 . f a g 0- IWfu~h8d QIB iW 8eptarmfber 19a+ TZ14 cmmlngn we- o a m imn tha ~ e . t e r n end o t the ~ a ~ s n d and tMy am mwbardd on the mr$;, in the @Mar ia whisk %hag ram den*. C a w 1 native Ita'bcsur w a 4 sr requireat. Y a Ltarr *re ~ ~ p . t t v @ thmughavt am% mpp1L~et amnoea 06 tranapoPlb $he pt4iy a o a g the crlrsaltr,

The b!nnua tarm$m can crommlentl$ be di~.irloB into ikva fBoBCI- gwrtaoesr* Thaed as@ be dLaccrneQ f rm the air cnnb by a of' the 1~68 MQ G ~ ~ ~ o u F ~ C ! nnys. TM.se pwriacaa o n dela#Ma under the bllewing hcnCLiWa:-

Bmtnagp ef 4hs r+atarn psH%sn ef fats ia2sM i r by d..plp. tnclwd mnaaqoant atma@. Thw dls..st a ~ n t w alopfng IBLUTSBW wh teh i.1 l a fm #ppmXfPIIElteM 9OU eet ncssl tho r W & iooslot f a mo lasml on the mflh -a&. ma amah

w8*=nlffo rttm of the t8Uiab i r ) rW3a?Zy Wmiraed Pran birt48 &&I fama an eaaarp:wnS .pmmlXra 60 %ha toad 2iw M 8authweot Brty, Zn h t h tmm %)scr gWkWz @loplryl: $w*a@6 8m bulirrrsd t o be the o~fgtnrl ~wfallw~l) 99 'f)'QLZmRISIa fltam hate been extruded iran r~rrClirs ia &he otstnktp af' 8mtbrrd rnrd m l ~ R- C~nrLdent kQh ~rnWd% a this f-pm p~dtueard fhiatk mi l nlaneb2e whW da a t ~ a a & one lopa % ta canfafin8 bauS8s ndulee* S t irtaq~,pmbarbf,e Qht similar b.lrnxt$a, ae&ules am Bmb1rg~rsd a~3r~mrhgrpa fa this t o p o g ~ ~ g k t o p m i n c e and dcdai led pmbgstttiag ef 118 ramn%cbdr,

s. A o n l p 2 . r bsnr&ttia dfl- petfern H t h tndiclationr

of &ah njlomrl*lon h i m the oantnl @ad hl.-he#% poHL.m iaf mra~lll ;frXlltI& "PbM Wrss tr(wn%$lm tws rub-pezrall~l wrd; rapFth mrrli- txsrrQ$ag mama a t f h rmerral peaks sxcedfne UWO f% The h- 8k on tihr islPlnB, HE* IJraqm4. ( 2 W ff, ?W 8eP.2Sl pkt@ ?@ falllb ra3.6hin %hi@ gone. 42% h i l l 8 nrr)

3" W and dh'&&fW MllroPbwkQB i n e t m ~ confrat %a that rwa -aterr $0 the r*H, The @tl#bsh~ a high r

ef n~aLm aestd t&p#~@ne bauX&~& 'mg at¶.- a f a #Xu a c or r i m B m a f ampla% Mth gccoXclagiiS an& topogmphie w l b n c s i n d i t ~ ~ t ~ l r tbrrb Wrr mna i# 6ld.m" fbn the 1=1;11.Ultq #rJt;lmm.b.mta# aAd mlmnlah Thtr 58 ambdbteeClg tbi "csm of oW8r m a * m f m M t o by -Montgol~ty, Olborna and a l r u n 8 r (i$U).

MJo2atng Che eerntml noPo en jlta ~ P f h - ~ ~ l s b t a r n b a u n i h ~ llia ran th~aer, r s h arsrty d $ 1 3 ~ f j r$r t~~b. af 8 ljtmetone

? Xtlll~liO* Thtlil %OW mpw W%8 %WWF#@~ ~ U % ~ Q O I ; X %he VilJtr@l O? l'azn&~+u ads fr;awgl f I;* P+tme rncqm&BXZi%(ca W & o w . #Po .xpoHd in the b d ~ a f d e w d rt Mia, @ad rere rlp W n ao rca#4Aoa% e3fff ilaeer fom.Frzg the tlralb n major 8&&k-balaw . w n p %aa4~a& i%a t)rs h m lcraSniPaZ1 aad rrtrs rrlctps1, a ""g, C P $hi%& rnantxar @S Pa S # ? h m ~ n 4& glM dbpwpl~1 a ay &PI)M

gQ the 8 1 ~ 8 ~ Wbaddad ta the a 8Mb U d h e W L madium and fino gr%llaapCI mcrltr wh%arh am tlh t tro be mwid;turlr f'mm *be arnwowa oi tdimww d p o r s t X a*. It appar. t w t a veneesl af tuff, 1rutsHiefstmt t$ mk& f?w Sb topbgmfpb~~ ha# basn "0" rag d0ed antdt aYlbruClguandT$, c?OBlp@abdt t o aZay. Q'cbar K @ w d i a p , hi# cZEfig edvgmfma baujtitcrs nsdulw~ Wkicpb aaaey f mourabllg*

Ttxa mjer wrl.nbblbew l&mImu is a fraturn ~lppxiralltdfg On% miZQ w i d e , frra lnilarlr long, @a8 -60 faQt 4-1 "n*hrr ozlS&n a? a Paaturn of dlnasneiorul bp aubsidenere i n t o crav3,tLela f6ma by loZutC@a 1d.~a9s L?aprababla, TetVConio: 6 P in tmaive i#ntteuae f P- hXow m y have caurad *he csa33agu. In wedarn FBpaa amdl :ZaLatmmr m3rars u plug# hdsw grbdnrcsd 4 atailal 'at-aieaw ~n ~ioaoacr ~tsm.tor*.

The serrten d~ha af th& f ~ X L A ~ Q 48 alrtlrrq* ";ha m t a o f cr-umlng rto, 4 1zrpp4aib8 t i w ~ o mtursly than thcl mllrOi

* of &)le i81mbr 'iltot topa d' h i l l . @ nDLl i.ifd:ms&w uc;ltaalwfb~$ a d 'a t unSom alePotion @ugg*aetlr& fm.:or p s n q l u n . t loa er mb-hs, rlisontal r i%ioh RtsdBeKP trd'f~'?msata rmdbt:*n~e mtdh

b alp t o net& ?!@ porfautslg JP, ere expoet& Ln tbs bed a!! t& r . d o iiret* 8k.w s . d ~ n t r a m reporte~ bg lutiv*. do oaonr gmamllg' ever tha ta~aterrs aenia & tha hrXa3nk This

1 iommtlon wnZ,d mi~8hierr raptBtaap prtv&uctng a mtum t?ip#pq93$ in a ~ o m p r e r t t r ~ g l y hort t..tmr,

Uucb ef the aliofecn e*~c#nitf a t Mm&us andl the adj~tatrag Iaas Magma Xlltun.4 era ctm?q%@ped of b d ~ f fkwk&~)n& ~f mernf arigtn rhfeh hat# bacsn r@lW u;~, $6 30 Prss* a b m #%a lare& Th%# rercent crme~gsnee $8 resf;r2$tatd t o tb abtt;errn end o f f t-~@ islamt.

Tenq#p~wttnsss and Zwsnfd%-@ am 18&Wel%U$ hi& thlrourhaub p r a h gwanmruimaa tunpermtum,&t ~ 0 ~ ~ g . u t* .t@ P ~ t d

the man m i n i m ba~lq;~eratu~sl, 7lM F. b"~xrth37 m@Wga# rithln I 8@F of the ebor% tsngrs~otulcrr rab rlsaw w mamnnl t5on&.&

f+rllclbrsriga thd m l ~ t i v e krddity vaPlaO balknqqn Chs nlwmow lirai$r Bd9" a d 8& hem cosd~tism ml~s Qt~a s r n ~ i m An waning $&a bmete urraalZy I)W~&#ID I F B I ~ $ U ~ at a& F

erat r id la am not stmng and present no hazard t o s h i p p w ,

. ,

T h whole islaad $8 heavily timbered with ra3a fibmat. 6alvera2 elelenrriva, at@# cif a hardwood timber loooUp k n ~ l l ~ .a# t4nmtn *re ~bosrvatd a43rcnns1: t o both north and , soaf h coaatl, %Is 'CSmber Bps not bwn incourkercs8 O& the H e w UuS.~aa m e i u l d bgt hrr b ~ n bbsemrad beattcred thraugh tb New Xrelkd raab S)crm$t,

. 'rbs .absenae of aassa\leries, h~rnbllls~ gaurra

p l ems, bush. fowl, wwte oscBatoar snd birds of rarsndtoa I s f t ? na abh6 . Wdlabisa are a1,1a$, Wild pi and o her ga~as are ZMIICN~~ Daa@raoa sal$natsr'e~oaQd$Xars a ound in the ertwriar

, & w g t b coaet, .,<

The sequema of depositIan ras inkerpmted fm reatt@md obaarvationrs i r rZIpplar* LaeaP basamenti is a #.dim a d d Pgampa mlgplex and farna a . oam about! which Ta*,iary(?) aredbn* l a r e been d e ~ r l t r e d . ""9 md rtabreqWat tr~ t M r dspoai$iwr emergenas Cools pfac* wmlaqg ng fb, I s l a a d fa %fa pmrsnt dh~nrZosrrs ,~ ' Whgh ar.rs&otrs 4 t W s $ s k M h d rarebed an,.ad~ahaed $tagor baraltio SlWa and t y t i s rrerer ejeoted fkoa ~ a e s r a l ventla and ~~ Bh# greater mrt of bhe irlarid, 'ltbere valuanlcrr h r a D Q ~ hen t8ruo$gral%y deforaed aihcre dapo82Whn btrt 8- ly Inalre#'dr~ina&te iaaporaed an tba stq#ertr rscent ollljitr BO t ~ ~ P W I em OM mia2ttw and on n m ~ b y i8Zcaadr Law a M Baluan may b b ~ e d s n t nirstltlfastatlans ai thlr phae of' .rru;tctaaupa* X f tMs $r tbs aasre then the voZuan3~ dcpaeit* of thr apw# mainlrod .ra pcobebiy of Plsiattaosne qp.

The strat$g;raphiad aaguence may be canvnnlen%ly UioLded thus p

I. B ~ B B O B I Q ~ 2. Mmdraa &beatone

.3. Iarlns Twf aeeous sedimnts , 4. V ~ l e r a ~ o * . * 9. Rassnt Rljl8sd Reef,

The follaning ifaa@1"3, t j ion~ of the above' fomaa9;tom . am baaed aa crursory fite3d cnxepiga Zonr w i l y r

4 ., . 9 , .

Basement wcr m0 aeZ%%ttaQ lrsoa ired in situ. 6" !Phd gp.velrrI of 4iearlu slsd W a t d W+sre, rhfah rain frm the h l g h 8 t ckr in %ha aentre of Sbo %$land, are omporQd Oj:

: :-%~ls*u= E~3x.a and boulder* Zra;k mcdiw acfd a u i h of p X ~ % ~ n h a@ h arb~srrrl -8, . 2% 5ar not sriblte t o '1

18g.tiarrPine .$eft 3 t s ly from thoad gmaSs .JW t@ her bascslilent 1s c t ? ~ yxZLuton or a deeply aroCIa& o ~ l m n t ~ ~ p&ug rohSoh 1 8 now abxpojad $a w d i u m , saB , croprrmp, 3aoliar.

v YMe llaesbana is ~srpo&rfkSle for %he hrrf top $a 'by dts~ribed ea~l$mx. Lt &a ezpud o f ! a attrem duo. f mbs through a ~ $ Q Y 4epqaaioa betwen %mi! rau a M JBaalauk Ctrpw8itag 100. 3)Lsnd we$ ob.aem#d' from la dirrtaaos 'as whltts rrrSla of the a m d+pv+#aian. ' The whole ot the kawt area i r o m r e d w i t h a tUak redblah-%.?own md gxaylah- purpXe, day But the aha~aote~irP2u~ b p a g ~ p h q r bidla&ts# limrtwk# a t #hallow dspth. TbP am& ahfHU1~ QZQ *h I83 c e t l

, . llme8tear -.$p ~ ~ u g h l y . the sror 'e l mbdtted * ~ # t topognphy,

. act ,of exposed ZUs#hono. lfo i@r .# i l r &m ~cnt in 'trb , *

$@a e w ~ m a saw bt~$ i i r br pmbaUc1 fbet i ILferom b d 8 @atirdx&, Xopatcd m $ y N scarhh. tlthol a l l , tb f %me- a t ~ & @ im rrjribr t o %* #4mp1~1b Ziamictae of JMw B~L.tala -4 tbe fa. @Uaea ara- $ . M t l l pfiUahtolag$oa2 evidsms 28. '

avafXab1c id ~511 IW .pegarB(Ld W' WMP WOIQBILO. It 51 tho~ghti te repseaant a aa baL ma? f&&d. .OB. the aorth-east- oesrb of 8 JY~C-%?~?~$~L?Y' ' 7 Libat14 C B P ~ F , ~ o f f @a)bU~ b ~ ~ b ~ t a n f .

? .. IPuZiaoeous, wal%4~adddril asrSna aediaent. w e r e

obsennd a8 Ba'Upnd WPcPgata on the ndrth .cos8t, a t Dmli' oa the routh ma.+ md in thn b ~ d of th. ,&wit$ River a t th4 w a b m and of thb ialrnd, . Dk olZ claacra the rediarentd were d5pp.W towards th etmat eat angle5 of ap~rq#W.rt~Zy QW. ~ n i ' PaxlQ t h ~ y are oonurl2Bered aa off-ahorm aqu$oalent bf tb >Wdl?au Lhisstoru and jn part, youmgqs: but; .aanfomahlle a e d l ~ ~ n t s , If the dips c ~ s a n * b nr oonr28tent .*ha several h h o r u u d fa** o f thia ta~~$$clt; t be aarstapad, 2hm smdbe?ntrr range fma ag X m ~ a t e @ - Xiw la~4@tone~ w whirrtwr ub8sr0bd wexe we2,Z f be ded, T b tnff@a@~)tzd ~fzntant c;rf t b m uQdiakat8 mu14 haroe origipted frm an ear* crplo.$ve phare of vent. t m m whiah ba$altrr f!Xo#d lau~h l a % e ~ ,

t CQR eratj;ttekp 111.etrqn.t;. v~Z#ewlsm ka8 a TQ& baaartla flaws m! $tiif# aver a lul* -9 of the ! q l l l l ~ ~ . T h d e valcanioa 'do not apggw t o b&n dlrfurbed #-@a! Bapouitf mg, $he &re aub-hm$to dnd rlnoo&qrnabXy @verrUe ~er t iar ) . [ ? ) Y&W rcrdimri'bs. ' wcs gqnalr.U$ '&~.v.cbm4

> . b~ a thtak #lay ~m$Xe , ~rhich, In ,vb#ervQb bsaadt hir gantalns bawrSta n o b l b a ,

* The d$8tzibution OE tb498e vd1aan16$ : izu$gest.s $ha$ t h y have origbated fioa seve$al tsn%a, T~lrb p o b a b l s xkntr a* now ~epr~8ent,slB by mlay slab LSouthwest B ~ t y # OB tb sauthem cto-st a t 'the western end ~f %he 5alanrB. t aeazpukte burdcs3ng tb t+ss bay. f om gopographlc diqder krcstnecra the south and mrth csaata, a he gentle f a l l i m . t b a ~ d i v i d e r t o &e north end mrthLicst' hnasta mpremntr

i the OTQIW f ' & o ~ surfam,

Tbds swfaw nf %he faow travep.agd*by arorahg . rOa, 1 br g den88 bXask fllhlqh" Z ~ q t & q $ era~)ehof d ~ t l l j l ,

Xd d a bf- ~Cedrorio far 3n a l l axpar~rar

th$+ b a r ~ a b has a ~ ~ + I f k u the t y p S W are far hartare

praduue4 by Oh$# * < .

) , I w r

Bouldard &f hognblgnd& endesi-%a * d t q olasamed Q& the steep slapea 1 m d i 1 ~ f e 1 y ~ o m - b f probaUp bcsl s h d f'mw th o*nt?a$ above nhicrh Ss axpassd jn aaatZ6n thickn~aar ,of tb f lm OP "tser5cte -vf . i ~ m a

, . v , t f , M a l W B q IS s e t i r a t * d 4~4.- fee%# +: iormf~on~~tor id i rd . the. ptrth .up$@ dqa kkgali

+ - . . . '7

I - 7 - . 7

- 'Y , TWr *ma U~II mt exm&@ bk& +rhould be included in fd pi.oapsat;ing for baadts..

Flw& at.t;)ia grsbern end of thn island t ScaUJ 1

a t Lorengau,, am brsaXtSer' rithatn#rrsuo eoerae plag I oe Yg are phmosrysts n a black aph~a3f&$~ gmpM3uaw vIth amemu8 ,

Vesi~1e8. Ihe atent of thean f2oW i s txnknown but they hr. '

b.m absuned as i & a l a h ¶ esppiagr v& bnddnc? tufhoeow sedSimentr near M ~ ~ a t a - a n d & m b m aa Lor 13egraer Laland. rSrr lievul

A

aurfa~e8 thqr rsq%bt. .raa4&ly t o p U o # mddish-brown alayr rh$oh aaerr iama13y ean%af n lor -grad) b a w l t e nadulsr sharrbag

a r@2ioli .Drt: kjp?StS~ fabPIjla 0 ~ ~ 1 5 4 by dimat reglacemnt of tb f l d mcr r br olmins rainarals.

C o r a l rasfa W e been raffled mp roxiraetaly 30 t feet apsve sea lro+el, sn Loa l ~ p o l r Tb'1aR4 ' hi# @01loTg1)130(b ? ht batsen p ~ a u e a i n c ~ . the vu~owairn dgssdbad above. Thm

Xithology of +,his blama'klon Wa8 Bpt rtx'armined ;tn detas l bUt it appqara t o be eo8agwssd of aoerre uoM%4ckrltua, 1% 38

I used artenalv~ly far surfwoiag riiads 9.n %he area.

Tbgi %g$arr$f atmoturn of the island h4a been bmed;ty. ~ u t l i a e d I r a prevloas ~sc~otfoae af th31 repoalk. Lack Q$

s midenas #mludsr further elaborstPon. f* i& probable that * a~condwg o t r u o t W ~ s have been deq4bhq~crd in Chs? Karl&e tuifaceoM8 .

a&dfiacknt;.r when thr wem r~lctvated t o their pwsent poa3tSon, bu* n a e ware r e b o g ~ j t e d durlng bMs hrrfed r ~ ~ o n n r i r s ~ o a .

B\xperl'rlalal nodular b a W t e s mm ob8emed In t h e laealhtdes. In aU. Znatanaea these hawtitea b v a F ~ e n developsd in o 1 . y .d&rivbd free younger [Phistoceru ?) fbwr o f tuff.. The dirr4zrl;bufr;ian an8 bithology of thare vale8nloa has dread bran 4err&rlb&, 'P)u b&tutItes were not studlhd in date11 ad Zlttlas'is hmn o f t h i x sxteruion either laterally or a t da th, Ii Analysis irr the lahratordssr of the Auatra'l.ian MtoaL.rn3t.m Pra uatlaa C ~ l s a Z a k ~ fndltctata that the 'trauxi&A *hgduTes are of medi\m t o high &mule, The msUtrt of t twse anarZysas are tabulated b6Sow.t-

I.r

Avall. " -0 Laoaliw 8 p ~ I i - 61% Total b 8 8 I aen No. $ . . %@3 $

A ~Arrrt r 1 3*2 9 .8 5% , X1.1 0, 9 29.0 v Crosr- 4 2 2.2 W ~ Z P:Z~ 7,4 019 3 0 ~ 5 ~

A 3 4.5 6O-Q ,a S d A 4.2 0.4 3Q.X

T h e bswrite ~oduxes were f iret noted an the muse of srorrslag Ha, 1 &out f W e &Xes m a the narth coast an4 a* em s l s r a t ~ o a o f a grox$mc&rlp &O feet, The bauxktc ;id naQ B obol~us bemaes c, : t u s k oavcar of mdex~awth anid leaf rnrtttid* X t was alsa~rnrdd on a narrow natlde trrs& rhfah bad bean acoured ouf; by Pain, &mll nodluLa8 ha4 bsea ooneentrated~ c -f . >

in guk%er&' by x'ein aatlon.. O m these d561I2 nodules rrarfs mctognl8ed aXoocrt Bearoh r ~ v w e d la s ndtilec seattcs~ed over o w l b ama. Thb beuxite row *me % * . M# '28 dies 2 . ~ i f a vr2h- south dlmftnrJon. Xtcr o t w dSmnrs$&W wum not alpland,

Ths Zit~gcstt nodules obs&*r# m w d approri.atel$ Bm ,p~uClidb. md the atr$raga mdlu2es. m%gW h4mean f IW omeer, Y@QuZ8 .ohap8 W e var,Md, Plva t!&ltinat tygQs - mcw)gnia4Q wSOh ae2sura rangin& $!FOB; ~aQd2sh-brcwn and pala ml- plapb t o gnpiah ink &a. *ME.. M& of the a b ~ ey:*a r . *

oaotxra in ovorlspp ng.lotwa1 zonea rStMh the dsjMtit. WkUg $8 kaown of tM ?&w%aual di~tsdbt&Aan of the d e p ~ ~ $ t *

* ,

' Ilrdallh-I=* wllstu (l8pepeai.m a) WddtJh-Drrrm, eF~W9om ~ f i s h - p l h k , dra8st~fi~ (8~4-31 a) PUZP rebq~tupb n a r 5 ~

9 mt&; inwb1,s~r (@W5$lss A21 TIS? p a m t rock oi ta*< abo*. fonu oi buuiit i .

ia belde~elti . to be a bsaek ~ a g l h . ; h P t L f f ~ i ~ ~ ' &ad$ . w M ~ f i F C I C ~ Z ; P QOMPO~I buf 06a;raiannaUy oasu3s aa waf hem& .W&ri~ in th# alo;p3 ?!I

+

1. 9 L $.. . -< YY, '

Thir tr uhdoubbedly ; idmla#fxm& ram. It oaoW8 a8 equid3.m!w,i,orAal rroQ~r8' W P M ,a t t d m dark ' b-llwlurr Ilat@ritiu am,, . s cronh* , m m ~ ~ e u ~ ~ d O ~ U U U ~ aavftiee W W O ~ do wt q p a ~ t a be siwsrir). uaste o~ reU arb aWu(zttdi, but

-smbJ,& e~avledsrr Ur"t.b@ 'gas YI~apyeb d t r i % q wlQ praesaa o f * b~wSl t ; i z r t i k * . ,

u]

SSBiXu. in; 'Mlow %t3 %h# . born. f o m but OIpBUJpn . ' .

u wughtily disabid mdubs ibbta*' )* , d a k U d ' a t o j 3l l~h.a ~II, diularitm* Thy ern baID+~ad ho -%q. s ~ $ a , a i kor$1tonBd lmrg or lrrruato uh%& b y e w&kiefW . . "&#& , ,\. .<@j tb 011;3t,

1'

'Ilhir f ~ g p vas not ',5m~iIia%%&y ~ o o p 3 z e 0 sr r Blaw2be EWept f6r a few aeddfala' da&~$$tq m~kSngs it i a qaitc raastve sad ampaat. A - ~ k . m 3.1 a s u a l t but no$ inruiably, dwe-pqb - .raw J ~ A - a t , - I E O ~ U ~ ~ of ~ i r fern ern brla~&f md 19rgbr. t b ; UWZ, ,often a 3 fnobr *Wake ~h irr appeer~ in hardt a aqbursa IBa!% be' ra high aZ\;ilt& - lbn s i i l i o i - ! b-ta [email protected]~ .i '&ti?? rabovs* ,

. . 40 e a i

, .. *

Z'h2 a macrrive farm $ a VQ - & ~ q and free% we8 ctmohb2daZW. X% UIIULIJ ODOUZZ i~ i f b ~ o f d . liodulbn Up t o ia %trhinbwss an8 4-6 inches i n Q S ~ B I ~ Q W sttggmting that *' h.o or l&aul3g ion@ s hard leyer i a ,bh. @lay. Zhn hardlrcr.8 ~ & 6 0 t 8 9 MgB 8*U@# Wnw$* "

9

I ariU nodul@a wel&hg. ns 3 @uaPar -re 40t obremsd, On frerh&y bmbn a&mr bh. aaQUes wpeo ar sccnticnr d a wWte by ate pink pa*e l l~oua @ ?a1 b. l ievd t o be glbb8ite, T~PI Wpn of b a u d k Y I bai J widespread over tb.

I wars travgrsed, "51

X t be stmased that on ha ocaaslan ware tk. above drsarikd pas u w i a r f t u LB tha ulay. ha ogoailrrnr e-ned were cal a o h d flmn residbal .oonaenf relCI~nor of aa8uler

9

"E famed at +ha sUPf)iW by *he .ararh2r,tgd act2on of min* Ths parw W8 R& equ3ppetl ts'b Wt tb dbgsct2; bypitt5ng. t @ T?:e -P1obumaYi$e- @alyaea frllla t h i s loaal l ty should

. 4 uasourago further prospaclti'ng Sa Ohis amar Bslsalts e i l ~ i l a r , t o t h e onaov~. irwh&chthfa~dep~sit; 2s,f@rsqd ambclicrgsd t o

extend over moat sf the mainland wr8t of erroasiag 80, 1.

utmmauar though t ~ s t1epiti14t is' in mpoptit.atd c o ~ t q r

aoseaa by r o d would not be g ~ $ 0 2 problem, Raqiest @ slast pmc3tiaasL aarrasa would be iZ.m pares fJ8rbour on Cba north aoaet whare deep watw entsharcc aan rxSsC, The rssa frcm tkvP north ooast,to th. d ~ p ~ s i t (6d it.) f r gradual and9 r i t h . a few deviaC$ans a rod QQUU fallm the mu%@ 05 erosriw Nu. 1. QP~Q*. olr i h ~ . route w e not ~ l o ~ s ~ i w wid vqzr ~ t t l e s~dc- culit4ng pquUI tbar w~assary, R e e f wra2 f5Pb~ the Q o l ~ t t would have ti@ be used for ~ r f r o l n g any roadre Sn &Us area for it is WkeU fbt betBar 'ha6aria'i would be eneamtered Inlartb.

Pble Bepbslt aas fi-.t ob6eprd on a we21 defined t n o k looally know@ a8 WQ. I. zrMa aboht* 4 ail@ east of Karallep mar tho 4ewQ&tan of the Fbgrb River. t was t~aver~cd PQF

. , about r ta "ths aoutih, 3iO~$$ve re or$# suggemt 9;wt the . depasgt: exten&a to8 the qaaf far' a @an8 Qercsble d i a t a a m alow the tseck t o Gomm$;aar,

D &dl nodules of' 4 ~ b ) . ROW ierruglnoua, other8

alrnoart pure gibbrribs ere ecattsrcsd abalrf %he clap suriaee, T4sy mprcsent a rasldua& concentratSm I"amod by $ha of o b ~ a f n , .The mdules were not* bb8cmed. $n s i tu in the clay u F; f'T t ey are be1 feved to b ~ p a r h f ~ l y di~persed. Thfa aotllb only be proved by pitt lngr (8peaSmens 81 am! W),

IB ao&rr placbs bauxjtfc arusts up t o an Inch ;Itn W @ c h e t s are fomed on the slay $~r~iaaee, Phase musts are aarapnred of rhib Calu~siWT ) &3;1r)raXs cir3snW partaller2 t o tha sur$%w Zn. a g h y or red nda-rmbc~~Xvabjts lotrlx. Ofbn tb

I oruats are lamina%ed by ho2iaaneaX narrow, red (ferrug$,t%ous) bands. CEipetctzneg B2).

~ W l c t stmrturet in 4Bs f3hy suggert that tb6 parent rock was a medlum-gratlnsd tuff or ahdesitio,floy.

b

rhls . b p o r i t i a wt readily, aadass$ble frwn the , .adJacbnQ south eoaart, but if m saraterXy exbsaatg~ o f the

depoari* i a prav~d i t may be praeisral ta.lra~i%+ a ma4 along the crfisicing nativar traak fro& Corangata a3 Ka~gZSthg* fMu . poclr*llty h.8 dot baa, % x u i n d t : ;

.q . ' 3ffmUu& . .

Mw-bnda Ya9W tra alre sosurrr rrppr~ba'tiely oar, ~lllar asuth e f Lorengab X% i-d., rzpo~Qjl by medslde ~ u t t i a g a

. ;tD red c5ryJ@mP f- l a w raOar trhkrr tt$iak wars iartalled ‘ , W $he Mrieria forlacr Be rpy ly tlieir base gt lio~~rmtta~ *he

% . rmow @f BmaMe oa afan~a S d ruZd p~trbably origlnrb4b fxblr this &i4!a%&.ba, zb baw#$e ~id3Ji,88. mot Pave b n obpeJ;'irrrd .nb uou$d p m i b l p be89 rrpo 4.d bJ Amrl.aa. englluarr when mfistp~tXng r&.Ods and l a m b ? E2 &.tho $atat $ a s .

X1D tb ' f i e l d tMr &agooSt I s not iarpreasiv~, and an rnalyalr af Zndividual nc.Bu3.q~ of b o ~ i t c a , ahowed an &v&labh ; dm4.t~~ eontent of 44,3$ wdt;h.LO.7$ ~ilica, Unlike the prevlamtgr . dasoribed depoorits, th6 nrrdubs af - t h l a depoallt ere a l l rr/,&;tar in aharaeter. They ara, irmgulir2y lsfiapad and vadp in ed'ttrw from le3.lcnr-brawn t o $my. ?he cmtlfam b a u l t e ranaourr8erad b X ~ c B f i t I a u A end B is lauk?ng. Tbre 1s sv idena~ 2n thm ibm of ra&iat ~struotuxc)~ %bat C h ncrilulae have been formed by mplaw- muat ~t the porp ratlo basal% QCypiaal of the era:. The grey 7 nadullsr w h q m frea ~ t y broba preuent a mttled white and grey S U T ~ Q Q ~ . T ~ I B *hit@ P P ~ O ~ I B I are? akaxetal f i l l i ~ & $ of o whfts ~ J a c r a l (gibbai.te) in lath-shqpd or r~Wed uavllier, wh: ch are ~ l a i l a r 3n shs t o the plag$ooleae pbno-

The rulrdulea also acme of whIch are

p d d u r f n g the tb nodular .re consfdsrably

1

fa the yallo* b m radubrr replamd plaglocZams am legs Uistinet. Th. yalLgm-bmwn aadulre rbprosent a aon

'.a#vaaclld stage de beux$t$a#tim $hen the grey m d ~ l e r (Spc~llsoatr C&,

Jlodulsar arrn rrparl2agly djlnapelcwed on tiw smfacs of ' the a ~ d , unless khe c l a y cQQt+fnr o ~ n s l d + r a b l ~ v a i 2 . b l ~ . . aua;lRa thsr Cisposit woule be r~b-uWaeFC.S93iC

Bimllar nodule8 we- motl in a mad eutt-8 a b ~ @ 1 h& r m i l 4 1 emt of Lormgau OQ tfu Mad t o IlbltBta?. Iedulaa r t %3r lqerlity arc not a8 dtbtgzdent 'bra t \ey are near the n a b r .

taafirr*

These depostta are very fatawnbly situottfd for afrtl* but unfortumertaly th t s2~ -grade 1 s 10w, Furtlyr proapeet-

'+at pa~phgsitic baaelt ernas $a ttm rfainity should be u n d e r t a ~ before tb area is dllslarirsed ma lprospeat.

' [email protected] t o thfs. @Pea wortld be by cristlng road one fiber harbour f b ~ ~ l i b P M e &

Wnue waterways caUB n ~ t bet oanrr24.erc3d ar a souawe of h g d c l . s t r i r pomp fot bawlit* amltixkg. krrert r lverr

: w@rt af consideration a h U 6 o ready source af powr bar raquLreC arc the -bare Warla Vpger RRPW* QR the Hew

, Wn@a mialsnd and the h ~ g b r r north-anstem Hew Irit.in.

&!&nu8 Illlrrisd ha8 an ignersllb @are, coapobed of a nrPdiubae$d plutoa20 a ~ & lex about wMch Xertfary 2imestme8 md marrSne tuffcracaouec 8 ki iaiatrBs have bmn d&paaltcrd. VolGm%a flora, eslldutial.~ basalbitt, and tuffs unconforubly ov9rI.h tbse scrdirnetits md poas2blp. the igneous bammnt. TMrr V~J,U-~~# I $.B thowht SO bo of ? ' X Q ~ S ~ O C ~ ~ U ) U O r ResIdmI 0 1 ~ 8 i r ~ a tb waatherj~g o f thasc valogniost carYea$n adular bauxiG. Thrm bam$tio lacalities were obsartrsd but not t a ~ t e d & pltt-, RodYles fraa twa of the laealitiaa are of are grade. Thfa ahou3.4 enqourage further prospeo8Qg and detdtcrd tast ing o f b a ~ deparlts, Clasleat s o w a r af byd~b-eleertrie power whiah eonld be uensidemd for tha damlapaat of power far s~e l t l a ( bartuc$%4 am approximatsly d l e a diasrfumt on Z e New QYZPer mainland ar in nalrthern Ben Britain,

11 Sylgsatsd Chief Oealtaglsb, T t) 8ugre.teb y % i l ~ l $ a h , Mlhniot Comiadansr~Lom~~a~,

Detailed te$t$npl of the b a u i t e depaaltr dererlbad 1n this report,

Further proarpau01~ +art of oroaring lo. 1

Investigatian of ~ a t i v ~ r ~ i g o r t a of bauxite on the HlOo. 1 Mad* cnar* of Kawaliap.

Further pros eat- oa the surface of g porphyrltio rraX8b near hrengeu.

Ydatgcpcm, J.#., Orbme, II., Ol~esrnsr, Y.F., 1945 - Outline of the Geology of Aurtralian Hen Quince, p r e p f w d fer

> ,

ilscorporation in thq ma4010py of the Cuinuonweailth o f Au80ralian by 8jr 'P, W, Ptdgm-h David and pr, W, 8, Brorns.

A 1 1 1 d GmgrapMeal &W!%~QR, 1943 - Area Btudy of %he Admiral8f fslarrdrs.