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PETERA.~OWN

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7

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Nov~e~1974:"

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\ 1

ABSTRACT, '. ,• • - . :

- \ '" " \ ·· f· ·

'. ': . .','-''In theEor~^Jlux~asques'are~^{five"geolo8ieai·diVisiOnsare-}

". '

~<

.'. ·,· ..\- ·.J·,' .·.. ' i .· . +,.> {, .:

.recogn~ed .~'"rb eee\8~e'Cape'RaJ,ColDpl ex::'The'Portaux~Basques'cc:implex _

- ' '91

e

W i' ' _s~r ~Oint~'eto~PI ~~ Harb~~r }~Cou

^{G ': ' \;'} e"1Iaydu

~~re;t L, · , , .,t._

v

~ro\l·p,-

• tr...^';l'he~ ^{firs t}, ^J\^{o ar:}_---^.se;ar•^ed

~y~

^andtlie

-~ird\~Yer1:l~a

,

~

^...

~

•^{r -,'}," ^\ .. e,

i.J

wide-mYIO~i~eo~^CapeRay Fault:1The~rbour

LeCOu tmd"B;y- -;

-~ '~~--,

,-'"

:.~ I p " \ -, . - . ,

~6fdGr oups o\ciir_~,\theeasrem part_,f.,t~~.area!Ul~ a~e_deformed" _ -

- . ' .'

.

^\

.

~ difrtn ther;ew~'ikingof the Po;taux.a8Bq~e,~mplex.:,I"',, , TheCa~e^RayComplex occurst'Qthe west of,th~p.

caPe

RayFault"',

~~zo~;"and' eompri~;S

^a

chaot~c".

^in'tenllely

~e;ro;re:8II:~ ~.iieue~:ratie

^{gneissf •-' . , ...}

•

i~tr".:

^..

t~.y. ~r~~~t~ci p~~~:...

^The

W~~d.O~\POint Gr ~U~~~~~~ ^{'-:: l'}

se riesofme.tasediiDentary and metavoluuie rockS-whi hunconforubly ,

. ~.. , I -....;., ~ • , , ' r---'---- I ~-~ -

ov_~r!i.e.t!te Cape RayComplexand ..the~p~ ~Faul't ne~::nd...have.beed....: ·

f

mild~~~~f?rmedby late tDOvem.entsa~on~ ~he...f~u~t.

i : ...

⁰¹ ~^{- , ' ,} .-ThePort auxBasquesComplex.c"-ropsoutto·

.

fite

i'

east of the

\.

Cap

. .-.

~e ~- ^I

,.'

Ra~~ault^{Zone and}COIDP t!Je'aaw bandfd gneis~^complex1nt~ded^by grani t i c phas es. Betvetn efaul.t .endis l e suxMpr ts at leastthree

:~2~::;~:':ll~S~ ;?:;t~~~~~~~ t·

' ..The

high~.t:~~~de

^of

~~':""rPhis~ i~

^••

~Ocl~t~d

^With.the

.~tond e~en y;

⁾

a~d res~lted_inthe'develop~e~ o,\~rnet-l at au ro l!t-e • .kyani :f'. / ', ' :-;, s~l1i~ite .~ndpot a,s s i umfeld~p~r.. Th~ ~~rt^\8U:lCBasq~esg~a~1!. •

it

i.ntr~~e,d ^t.hegne~~s i~^post,~~,:~,.p~e:D2.~~~ea.~^.\.~. ^'. .

: . .. ..

^'

,

".~

':.,

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.:....

<.

'. \,~

r:

, • . . . • . ~'-_.~ ^{.. . . , , ' ., '1, "} t.~i~ ·:;)/}¢; :\ . . _{:.,7> _ : :li,~}

, l'; 't ~, .~ ;~:JW:i..j~j i,~; ,j [;;iS'·· ;;'··· · "

·'....~ef~rmedInd.me~amorphos~d.··::Tb~8~:.~~f~it~.,.t?reea~efec6gn1secl ••.':.

:~~\ 9~erprJ,nt th~ ~.1~.iO !~~~~'e~ " .d~ r~.~t. ~. ~~: d'~l~P;;;.;t;' ~~,~,~"

·. ho ea$t;

of~8hear

"Zones , re'ctiab eut

fold., -

and·teet:onlcal:tdea.

fifu; tng.

• -'1- . . . ,

I ..' , . . .• .',

I '

\,,_. :the.earl1est·event,·whi chiB4'tll~u~ni't'.pene~ra~·fv~.·t!i~~^gne1sse,l~re^..

>;?,~~ ;::f~;·~~:;'::r:t:~0:,~~;,:~~? :,:~:·;~~~j~·'ft~c:: .~'. " _.~ .

.

<~'t o semi-pelitic:rocks;the.Barbour.Le.Cou._Croup,~·.lnfolded,·,byth.1S-event....

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:-.,-~.;,

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;::': .> - ~::-:. '. :.;. ' ..!nt oth egneisses .· 'A stryetuial

ana

&etaiaoip~lcconver gedce.t~ar~·.,-tb~:· .:

)a.~.~~t-c~~~r ~~t~c~ .~~· ~·+~~~;·;~:f?~.:EiI~~~.~tYf, :~(? i '~ ':~ "

.:lithol ogical·bol.llidaries ;:schist os U::f,es ,'.and:1iat rue'lve·tow "."Vit hfnit;'.:';'~'.:. •..

... . ...... . : ••¥ '• •'., " ;~ ~.~;:• •~ ••• • • ,t: :~'·;<I<;.....;···,_·.'. ".- <.'

.~^•and·an·B~ppa~~t~rad:t~~l ~:UlO~ph~~'c~t~c:t acros~^•.Te~ton~::^.:..'~~::^,_.

· 'l1d':::d:~·:~:::;l::~i;l.~jo:~:::i~j~~~<.i~·;~~.~~B~> ^du ~,rd ;

. ~r~up,

^vas

affe~ted

^{b; .tlie'}

~~:~ktng ~·e~~~ '71~:·'. ~

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~~up·is:

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^Devonian

In·~8~: in:di ~.~~g tha~ the~ '

^•

• -;fi ; : ; 'V:.i'C, -, ' . - '., ' ,.•.~ ~ _

•.~worldn 8-deformat10!l8 ere, at theoldest. !II'Acadi anevent . - \

',::-"\ , '!'he

~"pe ~

^{Fault i.Ba 1km.wide} !o".;e'Of

b~:~e de;~~tlo~· .~. 1;~<,

!_

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~i~~~j;t

th~Lwesternmarginof the Pro"to',

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'At"lanUc.OCean.·

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'Ibe..i.Port~auxBasque;e.

'~~~

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. '>. c~m;l~~ " ~~CL~.d~~~~.~ot~C ~~t.tli,;~~~ ~ ~~~~i;~:'.~

.'. cohav e fo'm'ed'pa; t of'.:ihe~tem-~rgin..·of.;the·Proto·Atlant icQcean. ~."

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B1BLIOC"¥HY, •'.''..: '.' " .'.,...

.APPENDIX

. r. ' . '

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{'

'

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..'-;

.

Na t ure of.theRew:ork~gl:'

A8e

of.

the-.~~~rklng

^::..,

\::~

^....

"•.'THE WE RAY._..

_ . _- ....

FAlrr.T ·ZONE···

.

^' . . ,", • .10.', GEOWGICAL''~iSTORY^-OF.

, TID:

ARY.A :

. . .

~'

."

:

.. . . ...

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138

. .

^' 146

.

:;

^{.;~~ .150.}

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,

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^157-'·,

162' :

170 177

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...-~ISTOF"TABLES.

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1:.D18t r'i butlo n of.li thol ogi esiotbe_,·P~r~.a~x'Ba8qu~'~::: ^{.. •} .e:

•...

Gne~'

^••

CompleX •• ·... . ..' : : >.. . ' . ' .. : .. ... .: ~ ~. ^{'> 6}

2:'Stru'cp~r~l~d ~etamorph:i.~-~iSt~ry o(t·~.Cape··Ray

. ,

~.tlP~~·~~·.·.~~~ Re·d:.RoCI(8~

^to

.:t.he. r:a~~~,,~y ·rtiUlt"" ~·; ~:'. ,

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3.'.St;ru:ctu~ai^and~~~rp~!~ h18i~ry.~1~th~8^.•P.O~~···auit-·.:

,...

:TABLE

I - : , :

··· .· l

IPO

.:!'

.~.:..'

159·'"

134 132,'

~mpar18on.of.'roclt'tYPes.~~o~rtie-Loog'RtiDgeH.8f1c Complex'

• • • . ' ••_. H.' , _,

and

't~e Ba;-

^of

.' I8i~ds.· ~oia~ l~ .~~t~ :~;~~~~ ~ri~_~~ ·~ .

.e~ui~al'e'~:t& ^•.::. _':;::.~:'-'

. . .. ..

^{.~.\\', .}

.. ..i, F~~lt·.~^.•.'.~'^.•""

Geological History of th eA~ea•• •

.t· · · :

... ^.'

'~\ ;:>,:Z;3j:SZ}~;?3t~l?~:~"'··'

s . .. S~triictu~~I .and: met~~rPhic.,

^{hi story'}

o f .the:·Cap~ ~~.

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~alct~ilicate!Jand.ro.t~~(:te"IO,~keif,~o.r·t_·.a~·Basques 2-. H,e l i)a~llied.-p:orta~B8sques:.Gneisl}·fol~ed.by

•.• .. ,.~ '" 'J" . .-•.- .-:-.'-. .'::

D3-(baseeent ),Pf'~t.aux lla'sques.•. ,;•.•..."

.3• .Mi,8mat.lt ic.SQ$! iSS•.·.·west.o·~.~sl2 _'S:~:~o,rF~

4. .Ba~ic.·~ands.·ⁱⁿth~ r~ork~cl^..po~t·^aUxB~Sq~e8Gtl:e~s~-

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,ACKNOWLEDG~TS

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wo~~~· l~~e 't?-::'i:~\~~~e~i~O~ ~. ~".

^j.

~~edY for".ht~

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inva~uab~ehelp,'and,sug8~s~i'~ns',bCl~~du'rt?g .i:h~"fie,~d~wor~,'and the

~' I ", " . , ,' ,"' , '. ' , "',.'•• '" _ " " " "

cOTllpi~ationof,t~ i8,the8 is,~, .,,rwo~~,a,l~~.like,'t~ t~ank.D~s;Smyth,and,., , ' .-

'C~lm~n~sa'~~ ' .

^Hr•

.-~~' , ~~ ',~1~~,~·.: ~~.,"~" :'~',':~'~e~~'~, ~ ~~~",;,

^,B.,:"

,E:".~r~.~~;,~ ~d

Drs.'Golle rs o~'and WilH s mSfor,hel"p!ul:di~l:~8ions••~eith ~eroy.

"Ja~ki.~^{'Rose .} R~ben^{Skinner,andBOb}'Wo'~d8'81;'e thahked

'fo r

their:~'si8tance^.''.-

'" ,in.the

fie~·d·

^..:

~'e ':~ta,fi ',~~" 't~~ ~~rt :'~~ :'~~8'~~~'8' ·Hot~~" ar~·:th~~.~,~d:-fOr

^:'

their t':Lreles~"~ervice.·'Thiswork wascarriedout·duriD.g'theteri~re'^ot":"

:, :1' " . ,~ " , , , :'. " ,^{,-fit' .:, ',':, '':' . , . •.:_":, '}

a

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Mem'orlal. :-Univer!!it)'". ..~.'Fello1o'ship

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wnach^" -ae^. 8J;stefullY^... ,acknowledged.^. . '

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.CHAP'TER'l

iNTRODUCTION. ..' .:

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.: 'Loc a tion'andAcc e ss'..

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;

The,stud; are'a;

' ~8 " l~~t~d ill:.··t~e ext~en-e a~~thwe_s.t.~;~·\iP.

^{of: .}

-,~elo!fo,un.dla~d.,:,~ndCOII!PT,fSe;.sappro.x-~tW.~~lY ^20Q~q. ^km.,be~een^CapeRa!

-:(la~';t~~c':^{47°40',longitucre}59.015~

> .

:a rtd_G~ria^{'B8Y -',}(la~~tude:⁴7~⁴⁰ⁱ~

<longitude 58°';l~')': The~~~n8'''~~a,da'Hig!t~ay·r~.·(^{fa 2,}kii?met~r8

. ' :::~:a::::a:::o:t:~b::::::.~~~j::.:~:~~~::o::r:q:::.~::d ' f::'

·l::: .B;::~:: .:~ . • ::;.B~::::.~1 '~::'::~3d:~:~::::u:.~.;:o:~.

: : (.;~g. \) ~.

^{:The area'}

from '~os~ il~~c'he, ealJt~a"t{ t~ G~~ia~~~Y:~i8'

^'only

,...,' ...:;---,---.. " i:',' . ,... .,/' " . ,

eccese db Ie by aea.. .: '"

. ' 1- ;.:'•. ..

Physiography'and CUmate..

: .Expoa ure 1n,~~e ~ap'-at-ea^is.B~~~,r~~~~i,aii~ a~~ng·"th~~o~,.t~ine"·

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vaeer Iogged.peat.depc af te,:--En the valleYs.where the'peat depos.itsare"

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LEG E N D INTRUSIVES

Port cux Basques Complex Horbour Ie C ou Group

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^{Windsor Point Group}

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^{Boy du Nord Group}

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Pe tit es Granite

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Cope Ray Complex

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in thesouth . To.t hee~st';i:he b~lt^is.b~~ded'by,"therelat1.vely

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Ne~foundland':Ls

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dist1n~~' ~eOl0g1C

9ubd~v!sions. th~^WesternPIBtfo~^{(lCa:y.,1967>. the}Centra~Pa1~eo'ZOlC

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...~~p~.Re.l~'(:~il~ ~V;'1.9~:~)., .a~d~;~e ~~~10n....p~~.~.~~mJ~Ya~~·.~.lbert ,· ':,·196.$).,"The Cenira l t..obUe'Bait•.charaCt erizedbyLowe r"Pal eo'zoie ;'.: .

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.•ei~e~s f~oa.th~.:q~~at~o~ them Pe~iri~~l~.~~~'~orth^to-cap.e)i~1^. . .

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.:und~forJled pre-:~ambt:lan"volcah'lC"a~dse41me~tarylI~queD;~~s..

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:rhe~eas te rnma'rg1nof the-Cen t r a-lHobiieBelt.conaists:of ,

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General'Geology. andMajor'S t ructll~al·.Dlvi8 ions·...

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the continua t io n of. thePreea~~~rO,ck8of-th eLong',Range'In't heCape.:

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~:arli~r ~bse~ations

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Ph~ii(1949)' r~~~d~d :

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io~g Ri-a&~ :ign~o~. ~rid

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·metamorph h:.Compl exasbeingPalaeozoicin age andten ta tivel ycor rela ted .

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".PoneBa y, east'.of th epreaentjoap'ar e a:.a nd out.lloedl.t;\IQ"gnC1&8compiexes'

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:,,:~.~ . '.~.lt,hlna..pred~m1na!'tl)'Devcntan."Jn~tasedJme~tar!.4n~~tavolc::~n.lcte!.~ain.·~.

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,.:'~"a,rid.::~!1~^..(1~6'si'c:a~rled ~ut.a~':er:;C?~.~J!l,i~~ur~ey~.;~,!~~~~ pe~t.lte~·'b~~~en·.

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..H,O\ol-:~~~.·;.i. t.;~a~.~?tunt1~..,t he..wor kof:.G~}l~~',(1?7.2):t.~a,~,~.

,'~etL~na~'~~"~'f'~he.·~r·ea"from Ca~e'Ray't'oLa-:"Po i ie::wa's'publi~h~d ; ',Gillis....

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'.'di~{d~d^thegnei s ses-~rtheare~'^iot,O:~hree· br~adl,e~.t~8eparated~y':the

~~~.e^.Ray'~'nd Ba~^..·diE~t:'f~ult8:'-',~est.^of:,cthe.~a·~~·~y.f~~lt.^he"r.~~~~~;~~d'^.'

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cOlllp~e~of guef ese sand'sc~i s ~~.whi c h,hecor~e.~a~ed with the:,;l~dl~ri . HeadInt;usiv~ Compie~^nearSt~~h~nvllle^(Riley9.1962)'.".TIle~gn'eis8e~.

7' '.is';·!f t~.~ ^{. ,} ';'Y :f: ~~t"~~~~t~~;aF~.~'l~ ~.~~ii .. ~ a~ ·ord~~1Ci.i~g.

·and , in"par t,~or r~.l.ted'with'theD!Jman~.Gne1S s ofCooper_ ;(1.954>'.~

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, B~O~ ,~197~ .

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H'~SC~ ' t~e·si's1.: u:aPP~d' 't~e '~oa8t~i' ~e'(!tion

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.'.fromRe·d.Rocks'to·181e~aux.&r;.~BTOD~ ·.He·di~1d.edtheareS.:i.nt~.t~~ee..

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