Région Des Lacs Mégiscane Et Mesplet

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Région Des Lacs Mégiscane Et Mesplet RG 166 Région des lacs Mégiscane et Mesplet "AQUEBE VC MINISTÈRE DES RICHESSES NATURELLES DIRECTION GÉNÉRALE DES MINES SERVICE DE L'EXPLORATION GÉOLOGIQUE GEOLOGICAL EXPLORATION SERVICE • - r..- .-....y.Y_.A! ~ `> -r• ,~ ~ + • ~ ~~'•:a~. ~'I'ik .' ,• !\, . rk 1+ ' n Ic ' ri L~r- ~ I 1 , i ,~` 1 ,• 1, i. ~~TT • tr '~'.~~ . a~~ ~( - '• r `. ..•.~ ~1; . ~~ ~ r'; r ~ • •0~ ,~ ,•, • \ • 1 : ~~ ~ ) r , 1•~ • ,`~ f •~ •~:~ .~: ~ •' `Y,~„ : ,ŸC..s • r ~^/r i ' ~ ~ • j 3 ~l. ~.a • ' V . ` ~ ? ~ t ".I ,•• I ` Pi ~ •:. r r 'j --T-- ~ » ~__ ~ . ~~—~ ; , • '—#—r' • _ ... \~ - -rt~~+ 1+~ ~ ~ — ~~~ --~-~~ ~+ - --_-~ - =-1~1►~~ ~-- _~~.~► v .s ~- .$: +~â •~ r ._~ . ? . ` ~C t _ :~ Yj ~;'~c. ~..~.. ...n\Fr:.. .~.;s•+ ...,~.. , 3• RAPPORT GÉOLOGIQUE GEOLOGICAL REPORT I66 R. CHAR RE 1975 DESSIN DE LA COUVERTURE: Le lac Saint-Cyr;vue vers le nord COVER: Saint-Cyr lake; looking north MINISTÈRE DES RICHESSES NATURELLES DIRECTION GÉNÉRALE DES MINES SERVICE DE L'EXPLORATION GÉOLOGIQUE GEOLOGICAL EXPLORATION SERVICE Région des lacs MEG ISCANE MESPLET Lakes area RAPPORT GÉOLOGIQUE GEOLOGICAL REPORT I66 R. CHAR RE 1975 77° 76° ., . L r . ' . • C PP, N ANVI Y - ~ ~/~.'Y .vr L AI L: ~~ }yANO ✓ ' ~® .,-, tir r ~ • '7 i! 1 •.li'l __`+' F.- 1 • - - ERC»EVILLE diOUi Des • • vi1) i ~ _~.- JNlpnlr NOVELLE,ELLES Al- UME BERGCREf ~OS~ N~ GAN /1 'j.yRÈR. CE • ROND ------..~.~JJJJ// I J l~ / T 1 // !.. f.rssard 7 ~s J ?~ ~ r- .,I ~,.~ a GUESC✓ :~~C ~ _ , 11 ~r i ~ ~ DE ,.Ra~ .OURR OUPL ~ BiNdi ~ E TAC r . GR MARIN ~~~ IT C¢alay~ U i' v—m~ r rut ra ~ h r 1. Sirohi L. 'r' f a r -o• M A ~ L, IrdI :TL ',' eE r i M ~ ~TOB , x W vr LO ~Nr. v RNE L WILNiNY ~ RALL AU CAR - - ET .. fEr ulra! . 7 ,~.b:ï ,r—ol,.,,lnoR ~ - 1 J 0 ~ w r~ 49° 49 ~I /cw BG E 4 ..... ~alr„i LAAS uOWIN STUART w~ ~ - I`, Ip - • ••~ -~ ~Ri ~ Lf L. INI ,V r f ' I,. , .. sattyrilE ~ J I II u,r-.. !„utr,, .. ~ rrrV' COURSOL _ LA61 , ••;BA TO ELlfj ~ - COMPTE AO» SAINT-PÈRE ~SÈRFy I ~u~E PLE ~/V ' !~1~ I ~ /:I'1 -C 1 ` JUNEAU • l'r~al .. Iltoçr Esiw~. AUGIER C»A --{ TE ARrCWRT ' CLOYq RMER ,.:. , I.. .(4 f l"; /rv` . n . '"'. ,._ .,._.... ',:f. , Canusrn ' r r((( ~'9`!. '1 ~!-j r ~-~ ~ ¢•• NOTi.ux~~ ~ SA,S:. ~Ee• ~~llr ~}`i~ MONT Av n/ - TSAR TIN vAL T ... Aa BER w~E OgEUrt %/ A%G~ r r . (MI• Nïl rJ, ~ ..--P ( '' 1 / ,- E T $~ -rJre .ON ((eNEOGRE Avu vASGN / ~ !,. l ai Non 1P ~ E jOUR. ) rod~i~/ , / TIwLENONT TAVE Ew V E G TRÉVET a O Bou R1 rt ~: SkO CwUS10N eE RIGvv ~" , ...1.?- YAUDrN ~r IV Mgnat a / .. ur .gur'r " .~" ", ~ 2 . I ..- ~~•f,~rrrr " RI' A - (j.Nf .DGN ~PETA« —" wEREV " SP ~ ~M T / ~G ff n. ~ ~L. ~ I ` ., ~'ti. , .hl--tla,l;r,Ml; . 48° 48°~ `IL r ~ DWVILLE O / l.. i prA ILLEBON DENAIh , RE - ' CROUART G AMEwAI LENS ESTu~ r ~ ~ 0 ~L. l .~ rr ~ ~ - ._ / _ 77 ° 76° LOCALISATION DE LA RÉGION CARTOGRAPHIÉE LOCATION OF THE MAP-AREA - I - TABLE DES MATIERES TABLE OF CONTENTS Page Page INTRODUCTION INTRODUCTION Situation 1 Location 1 Accessibilité 1 Means of access 1 Topographie, hydrographie 2 Topography, hydrography 2 Ressources naturelles 3 Natural resources 3 Travaux antérieurs 3 Previous work 3 Travaux actuels 4 Present work 4 Remerciements 4 Acknowledgements 4 GEOLOGIE GENERALE GENERAL GEOLOGY Dépôts glaciaires 8 Glacial deposits 8 Gneiss à biotite et Biotite - amphibole amphibole 9 gneisses 9 Gneiss à biotite 11 Biotite gneisses 11 Amphibolites 12 Amphibolites 12 .Amphibolites schisteuses •Fine-grained, schistose à grain fin amphibolites .Amphibolites grenues •Granular amphibolites .Amphibolites linéaires •Lineated amphibolites Roches carbonatées 15 Carbonated rocks 15 Granites gneissiques 16 Gneissic granites 16 Granodiorites gneissiques 16 Gneissic granodiorites 16 Gabbros, diabases et Gabbros, diabases and amphibolites associées 18 associated amphibolites 18 TECTONIQUE STRUCTURAL GEOLOGY Phase de plissement iso- Syncrystalline isoclinal clinal syncristallin 20 folding phase 20 .Plis .Folds .Linéation minérale . Axial mineral lineation axiale Phase de plissement dissy- Synschistose asymmetric métrique synschisteux ... 21 folding phase 21 •Plis .Folds ,Schistosité •Schistosity Page Page Phase d'ondulation 26 Undulation phase 26 GEOLOGIE ECONOMIQUE 29 ECONOMIC GEOLOGY 29 BIBLIOGRAPHIE 31 BIBLIOGRAPHY 31 ILLUSTRATIONS ILLUSTRATIONS Carte Map No. 1766 - Carte géologique de la No. 1766 - Geological map of the région des lacs Mégis- Mégiscane and Mesplet cane et Mesplet Lakes area (1 inch to (1 mille au pouce) 1 mile) TABLEAUX TABLES 1 - Formations géologiques .. 6 1 - Geological formations 6 2 - Analyses chimiques d'un 2 - Chemical analyses of heter- gneiss hétérogène et ogeneous gneiss and fine- d'un gneiss fin 11 grained gneiss 11 3 - Analyses chimiques d'am- 3 - Chemical analyses of amphi- phibolites 14 bolites 14 4 - Analyse chimique d'une 4 - Chemical analysis of carbon- roche carbonatée 15 ated rock 15 5 - Analyses chimiques de 5 - Chemical analyses of grano- granodiorites 17 diorites 17 6 - Analyse chimique d'un 6 - Chemical analysis of meta- métagabbro 19 gabbro 19 FIGURES FIGURES 1 - Schéma géologique 7 1 - Geological sketch .. 7 2 - Stéréogramme des éléments 2 - Stereogram of tectonic structuraux de la partie elements in the northwest- nord-ouest de la région . 23 ern part of the area 23 3 - Stéréogramme des éléments 3 - Stereogram of tectonic structuraux de la partie elements in the southeast- sud-est de la région .... 24 ern part of the area 24 4 - Stéréogramme des schisto- 4 Stereogram of fluidal sités fluidales de la schistosities in the north- partie nord-nord-ouest northwestern part of the de la région 25 area 25 5 - Représentation stéréo- 5 - Stereographic representa- graphique des éléments tion of structural elements structuraux de la phase of the asymmetric folding de plissement dissymétri- phase que 27 27 6 - Coupes le long de la ri- 6 - Sections along Pascagama vière Pascagama 28 river 28 INTRODUCTION INTRODUCTION* SITUATION LOCATION La région des lacs Mégis- The Mégiscane and Mesplet cane et Mesplet, cartographiée au Lakes area, mapped during the 1970 cours de l'été 1970, se situe dans field season, is located in Abitibi- le comté d'Abitibi-Est à environ 70 East county, about 70 miles north- milles au nord-est de Senneterre. east of Senneterre. It includes Elle comprend les cantons de Masê- Masères, Mesplet, Kalm, Closse, res, Mesplet, Kalm, Closse, Cher- Cherrier and Deschamps townships, rier, Deschamps et une partie des and parts of Souart, Barry, Bailly, cantons de Souart, Barry, Bailly Noiseux, Logan, Bernier, Coursol, Noiseux, Logan, Bernier, Coursol, Juneau, and Hanotaux townships. Juneau et Hanotaux. Elle est couverte par les The area is covered by the cartes topographiques provisoires following provisional topographic au 1/50 000: Lac Mégiscane Est et maps of the Canadian Government Ouest(32 B/12E et 32 B/12W) et Lac (scale, 1/50 000): Mégiscane Lake, Mesplet Est et Ouest en partie (32 East and West, 32 B/12E and 32 B/13E et 32 B/13W).D'une superficie B/12W, and Mesplet Lake, East and de 658,14 milles carrés, elle est West (in part), 32 B/13E and 32 limitée par les longitudes 75°30' B/13W. Covering 658,14 square miles, et 76°00' et les latitudes 48030' it is bounded by longitudes 75030' et 48°55'. and 76000' and latitudes 48030' and 48°55'. ACCESSIBILITE MEANS OF ACCESS Le domaine cartographié The area under study is est facilement accessible par hy- easily accessible by hydroplane from dravion à partir de la base de Senne- the base at Senneterre. It may terre. On peut aussi s'y rendre also be reached by the Kapitachuan en empruntant la route du club Kapi- Club road from Bourgmont station on tachuan depuis l'arrêt de Bourgmont the Canadian National Railway, 70 sur la ligne de chemin de fer du Ca- miles east of Senneterre, and Mé- nadien National à 70 milles à l'est giscane river. In the area travel * Translated from the French. - 2 - de Senneterre et la rivière Mégis- by canoe is very easy by way of Mé- cane. Les déplacements en canot giscane, Macho, Saint-Cyr, and Pas- dans la région même sont très faci- cagama rivers, along which rapids les par les rivières Mégiscane, are few, and by lakes connected to Macho, Saint-Cyr et Pascagama,qui them. The old road along Canusio ne comportent qu'un très petit nom- lake and Saint-Cyr river connecting bre de rapides, et par les nombreux Bourgmont to Chapais is abandoned lacs qui communiquent avec elles. and impassable. L'ancien chemin longeant le lac Ca- nusio et la rivière Saint-Cyr, qui joignait Bourgmont A Chapais, est abandonné et impraticable. TOPOGRAPHIE, HYDROGRAPHIE TOPOGRAPHY) HYDROGRAPHY Le relief est très peu ac- Relief is very low, the centué. Le point culminant, situé highest point, in Masères township, dans le canton de Masères,est A being 1520 feet above sea level 1520 pieds alors que les très nom- whereas the altitude of the numerous breux marécages se situent A l'al- swamps does not exceed 1300 feet. titude de 1300 pieds. Les rivières Macho, Saint- Macho, Saint-Cyr and Pasca- Cyr, Pascagama coulent vers le sud- gama rivers flow in a south-south- sud-ouest et sont affluents de la western direction into Mégiscane rivière Mégiscane,qui traverse la river which crosses the southern partie sud du terrain cartographié part of the area in a general west- suivant une direction générale northwest direction. They are con- ouest-nord-ouest. Elles sont en nected with numerous lakes trending relation avec de nombreux lacs de in the same direction. Some of même orientation, dont certains these lakes are large, such as Ma- importants tels Masères, Mesplet sères, Mesplet and Mégiscane which et Mégiscane, qui atteignent une reach lengths of about ten miles.
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