BC Geological Survey GEOSCIENCE MAP 2006-3 71 72 73 74 75 76 77 78 79 580000E 81 82 83 84 85 86 87 88 89 590000E 91 92 24 24 Geology of the Holberg - Winter Harbour 127° 48' uTrK Area, Northern Vancouver Island 23 23 NTS 92L/12W, 102I/8, 9 ( B ( G.T. Nixon, J.L. Hammack, V.M. Koyanagi, G.J. Payie, L.D. Snyder, A. Panteleyev, N.W.D. Massey, 47 48 49550000E 51 52 53 54 55 5657 58 59 560000E 61 62 63 64 65 66 67 68 69 570000E 12 22 ( 22 (( ( ( ( ( SS 67 14 Ñ( D.A. Archibald, J.W. Haggart, M.J. Orchard, R.M. Friedman, T. Tozer, SS ( uTrP Ñ Nahwitti S TT ( Ñ( (Not Mapped) 128° 12' tr TT (© 5 uTrK a RR ! 54 128°( 00' © ( ( uTrK n ! 5 ( 006 b AA 54 ( ( ( ! y N H.W. Tipper, T.P. Poulton, J. Palfy, F. Cordey and D.J. Barron d NN lmJL 274 a d 28 40 35 ( ( 5 ( BB 5 d h 0 ( BB ( © w Batholith 0 YY it ( ! ( NN ti 21 ( ( AA 21 ( ( HH (Not Mapped) lJL ( uTrQ HHWW GEOLOGY ( ( III ( er uTrK ( TTTT Riv by R ( TT ( William d i ( ( (( III 5620000N ve ( ( ( ! r ( ( 007 ( G.T. NIXON, J.L. HAMMACK, V.M. KOYANAGI, G.J. PAYIE, L.D. SNYDER, A. PANTELEYEV, N.W.D. MASSEY, J.V. HAMILTON, D.J. BARRON (BC Geological Survey) lKL ( uTrP JIqdi-qm ( ( 24 ( ( J.W. HAGGART (Geological Survey of Canada), D.A. ARCHIBALD (Queen's University) Lake uTrK (( FF 2 ( 5620000N Ñ (Not Mapped) AA ( 36 (Not Mapped) uTrQ UU ! TrJBvs ( ( ( LL ( PALEONTOLOGY GEOCHRONOLOGY 22 uTrK TT 35 0 0 75 ! Ñ 90 0 40 uTrQ ( ( ! 30 2 2 ( ( 165.6 (± 3.6) Hb d . ( by by ( 5 181 (( 142 19 Ñ ( 6 d 19 ! ( ( ( (! ( d ( 00 d ( ( ( d 00 ( ( Ñ 013 Goodspeed ( 194 M.J. ORCHARD, T. TOZER, H.W. TIPPER, T.P. POULTON D.A. ARCHIBALD (Queen's University) uTrP 3 Ñ 2 4 Goodspeed uTrP © 4 0 d ( ( ( ( 500 d 162 ( ( 0 0 (( (( uTrK 0 ( 20 ( (( d J.W. HAGGART (Geological Survey of Canada) R.M. FRIEDMAN (The University of British Columbia) 2 ( 0 6 (( 143d Brink ( ( ( © 5? uTrKls 42 TrJBvs? (( Porphyry JIdi 79 FF © 6 ( d AAUU 77 Kains 22 0 ( ( UU J. PALFY (Hungarian Natural History Museum) ! ( LL Lake 0 ! 60 ( ( uTrQ LLTT d © 1 ( ( © 4? ( ((d (( ( 98 d ( ( ( ( d Lake 18 ! © (Ñ9 JIgd ( 90 ! 2-3? d 198d 195 18 F. CORDEY (University of Lyon) lJL ( 200 ( © Ñ15 ( (( ( 24 ( 20 ( ( ( uTrK Nahwitti 20 ( !( lmJL ( 2 k ( ( ( ( lmJL ( TrJBvs ( B d ree ( JIpo-qdi uTrK 197d ( C ( d D d JIdi-qm 14! ! 29 lJVx ( ( ( Lake ( ( (( ( !( 20 008 ( ( ( ( ( ! Ñ ( ( ( ( 26 ! ( ( 46 4 ( WW ( 25 ( ( ( s 25 02 WW (( ( ! ( uTrP n ! 244 (( ( i lJLv uTrP 74 ( ( (( (( ( ( Ka d 50° 42' ( uTrP 3® III TrJBvs ( ( ( 196 ( uTrK ( D © ( 15 LL ( ( JIdi-qm d (d N © 32 uTrKls ©4 uTrQ 75 LL ( uTrQ ( ahw © 2 ( uTrK WW uTrP LL ( 76d ! it ( ( WW 17 ( D uTrQ d 245 ( ti (( 17 ( ! III kilometres IIIAA 37 ! 5 6 AA ( AA 14 ( ( © k 242 0 ! ( uTrPv ( ( JIdi-qm ( ! NN d ( ( ( 2 e d 0 MM Ñ k ( ( © 192 (( ( ( MM 009 Ñ uTrQ ( uTrQ e (d5 69 ©((( ( 45 OO 50° 42' 3 ( ( ( d OO 45 e OO ( ( ( 21 uTrK ( 55 r d( ( 20 Scale 1:50 000 ( ( ( G e d uTrQ KK ! ( d C © d r ( ! ( ( ( d ( Ri 90 ( (( 14? AA ( uTrK o ( ! ( v AA !25 38 e ! ( 0 r C ! ! 55 241 uTrQ 62 ( ( o ! 14 ( NN ( ( 0 ( d 37 NN 1 14 45 30 ( d 78d 49 ( ( B Ñ ( ( ÑÑ85 0 ( ( 2 ( 14 0 42 s ( ( ( 176 (± 3) Hb ! ( ( uTrQ AA 2 ( p ( 69 2 TrJBvs ( 2-3 ( Ñ ! ! ( ! ( 253 45 ( ( ( e ! uTrP 14 55 Ñ ( uTrK e ( ( r ( ©( ( ( 55 ! ! © ! ! d ( e . © 4 ( ( 20 !( ( ( 72 ( 19 lJVx? ( ( ( ! uTrP d d30 ! d 76 75 90 16 15 ( p d 16 B d 32 ( ( lmJL ( ( . d ( ! ( LAYERED ROCKS INTRUSIVE ROCKS ( l ( 40 (( ( ( 37 ( ( d( ( ( uTrP ( e 243 12 (( 160-170 15 a( 75 ( 22 165.1 (± 2.8) Hb ( 5 ( 21 ( 85 ( 72 e 45 © (! 70 ( © H (( ( ( 25 ( uTrK lJB © ( 10 ( M uTrQ ( !30 ! ( ( A ( ! ( ( ( A ( 30 ( ! TERTIARY (?Neogene) ! 2 ( ( ! ( 5? ! 2 4 62 É( ( 4 ! ! 37 uTrP ( ( lmJLm 0 66 D ! UPPER CRETACEOUS ( ( 165 (± 14) Hb. JIdi-qm 0 6 ( ! uTrPv ( 57 ( 6 32 32 © ( ( lmJL 00 ( D ( ( 13 ( 25 15 ! ( 82 ( B ( ! ( 38 ( ! ( ! QUEEN CHARLOTTE GROUP EQUIVALENTS (IN PART) Rhyolite sill complex possibly equivalent to Alert Bay Volcanics. ! ( ( ( ( ( JIdi-qm ( ( uTrP ( 80 Tif ( ( 4 ( ( (( 40 ( 0 12 ( 30 10 ( ( ( ! 15 ( ( 0 iver 63 Ñ ( 170 (±2 2) Sc ( ( 54 15 ( R 2 74 ( Cenomanian or Early Turonian to ?Santonian ! 88 52 Ñ uTrP 4? ( ( 173 (± 2) Hb 2 ( ! ( R ( . ( S 12 14 i ( A (( 65 20 2 4 v ! 42 ! a ! 0 75 ( uTrP FF n lJLf 0 © e 35 ( FF ! ( BLUMBERG FORMATION ( uTrPv 16 ( Ñ ®( r 79 240 ( ( AA EARLY TO MIDDLE JURASSIC ( Ñ(( ( ( ( 2 26 TrJBvs 82 5 uTrQ ( ! d 65 UU ( Ñ ( ( 2 ( UU e 40 B 2 ( lJL 13 ( ( 70 ! e © ! d Hushamu( ( ! LL Jo p © ( ( 60 ( ( ( (( 44 LL Massive to thinly bedded lithic to arkosic wacke with minor pebble to B se © 15 Mount ( (( TT 37 f s ( ( TT! 239 44 1 ! 5 ( 60 62 ( ISLAND PLUTONIC SUITE ( 18 0 d uTrK? ( ( ( ( ( ( 0 D Lakes uKBsn D 0 o ( McIntosh(( D ( River 30 ( ( ( ( ( ( d cobble conglomerate. o ! 45 ( ( ( d 14 33 (( D 29 ( ( ( ( 60 A( ( 14 00 G 2 ! ( 77 ( Medium to coarse-grained, equigranular granitoid rocks and porphyry; ! 62 1 25 ( ( ( ( ( ( ( ( JIpo ( ( ( (( (( H 400 2 ( ( A u includes hornblende +/- biotite-bearing diorite (di), quartz diorite (qdi), ( 30 ( ( ( s JI 30 ( ( D60 D 75 h a W ! ( (( ( ( y 42 ( lmJLm 185 m ( Massive conglomerate with minor lenses of coarse-grained lithic wacke. plagioclase +/- hornblende porphyry (po) and minor quartz a ( B50 D( u 226 mJPf1 a ( d n uKBcg B ! uTrP ( d 2 lmJLm monzonite/monzodiorite (qm) and granodiorite (gd). ! 28 D ( o ( ! 54 30 k ( uTrK ( ( mJPf2( D a 28 ( ! J A 13 75 en uTrP? ( ( mJL/Pm ( n 13 ( ( s lmJL ( 79 52 a e ( ( ( Hushamu 35 ( Minor Intrusions n ! 85 lJLf ( FF ( ( ( ( ( TrJBvs? B f ( AA 38 ( ( 177.0 (± 6.4) Hb ( ( ( ( D Cenomanian to ?Turonian e ( ! ( ( ( ( ( ( ( s UU ( 36 . ( ! 30 ( o UU ( ( ( ( ( ( É 169.6 (±0.4) Subvolcanic basaltic to andesitic, aphanitic to porphyritic intrusions: C ( 25 ( Pluton É( ( J ! Pluton ( ( LL ( ( ( (( ( ( SHALE UNIT r ( TT 010 ( ( 32 JBi e TT ( ( mJLm ( ! d: diabase; dp: plagioclase-phyric diabase. e d TrJBs !17 ( ( ( ( k ( ( 37! ( ( ( ( HOLBERG ( ( ( Dark grey, calcareous to non-calcareous siltstone and impure limestone interbedded 12 ( ( ( ( ( ( JIdi-qm 12 8 ( ( 51 ! JIdi-qm ! ( 3 JIdi ! 42 ( ( ( ( uKus n Ñ 1® ® ( C ( ( ( with subordinate wacke and minor pebble conglomerate. a ( 22 ® ( (( ( ( ( S Kelley ( ( 3 50 ( ( ( r (( Subvolcanic rhyolite dikes, sills and intrusive complexes. e D 40 D ! ! 14 ( 0 ! lJL ( ( ( 50 ( 131 JBif 64 ( 40 ( 70 e ( Island 28 ( ( Mount uTrQ ( 30 ( ( ( ( ( ( ( ( ( JIdi ( ( k ( ! ( ( Ñ 5 ( A ( Ñ ! A ( d 3 © ! ( ( d 28 012 © uTrP ! ((( 70 ( 50 ( ( 9Ñ ( lJLm ( ( ( C ! 33 d © ( 56 D ( ( ( ! d B ( 5 ( 40 ( ( (( ( ( ( r ( 33 35 Hansen 0 ( ( ( ca.161 Al ( ! e LOWER CRETACEOUS ! 72 . ( (( ! ( .( ( ( e 27 30 ( ( lmJLm ( lmJLm 11 33 5 ( ( ( A k 11 ! 0 5© 87 ( ( 34 25 ! 0 uTrP 4 ( Late Valanginian to Barremian ! ( TrJBvs uTrK ! ( ( lmJLm ( ! 57 uTrQ 70 ! D D Radome 4 ( ( ( ( 0 ( ( ( ( 0 34 200 ( ( ( ( 9Ñ lJLs 12 ( 44 33 ! ( ( ( (( ( LONGARM FORMATION EQUIVALENTS 9Ñ ( ! ( MAP SYMBOLS ( ! 38 47 (( ( ( ( 45 ( 271 5610000N ( ( ( A ca.160-167 Al ( 2 ( ( ( D 30 0 ( d ( Pemberton ( D 0 # d ( ( ( ! 40 9 4 Thinly bedded to massive sandstone, siltstone, mudstone, pebble conglomerate ( 2 9? ( ( ( 9? 9 0 ( D . Geological contact, defined D ( .( lKL 0 mJPf1 21 30 50 10 11 ! ( 400 (( Ñ( Ñ ( 70 ( and minor coal; locally fossiliferous. lJLf Ñ 12 2 11 Hills ( Ñ 14 ! ( ( ( 0 ( ! ( ( ( 2 ÑÑÑ ( ( ( 0 ( ( Geological contact, approximate Ñ (16 D lJL ( D ( lJVx ( 20 Ñ 30 54 ( ( ( 70 Ñ Ñ 33 ( ( 76 ( ( 00 5610000N ( TrJBvs 2 ! ca.145-150 Al 2 60 44 ! 8 ! 25 14! ®( 14Ñ 22 4-5 (! . D 8 ( ( ® ! Ñ (( ( 82 ( . ( Geological contact, inferred ( ! HH D 308 ! HH . ( D 30 JIpo HH . k OO A Ñ lJLs? Ñ © OOLL ( ca.145-150 AlD d e © 4 LL 2 ( ! ( ( 35 80 BB 46 45 24 ( 57 Wanokana UPPER TRIASSIC (CARNIAN) TO MIDDLE JURASSIC (MID-BAJOCIAN) ( e © EE ! © EE Unconformity, approximate ! 54 28 48 r RR ( ! D ( 4 (D ( d GG ( !( ( 46 d( ! ( 0 ! 4 68 D C ( ( 80 ( D 42 ( 0 0 TrJBvs uTrP 34 ( ( (( 2 18 lJHs ( ( BONANZA GROUP ( ( ( ( ( 0 lJLm ( ( 09 0 ( G uTrK 67 ( ( ( 35 Pluton 09 Unconformity, inferred 2 0 ( P 1 0 47 lJLm ( ( l 00 lmJLm ( 30 0 ! ( e ( e ( ( 32 ( D ( ( lJL lJVx lJLv g r 88 90 270 ( 15 D d 89 Rhaetian or Hettangian to mid-Bajocian (Holberg - Winter Harbour Area) 17 47 uTrQ ! ( ( 47 d (( ( a u uTrQ 2 ( 88 d ( D 35 High-angle fault, defined (block on downthrown side if known) D ( 16 t p ( 400 D 2 ( D Mt ( ! 10 ( t ! ( ( ( e 2 d ( 17 ( D 0 ( ( ( 35! ( m ( 55 JIdi-qm D ( ( 42 ( ( (( LEMARE LAKE VOLCANICS (subdivided by lithotype) ( ( 0 ( ( 48 29 ( ( ( 14 High-angle fault, approximate ! ! ( ( ( ( ((((( 32 ( ( uTrK 5 D 23 87 ( ! ( ( 26 ( Brandes ( ( ! 28 Age designation: mJ, Middle Jurassic; lmJ, Lower and/or Middle Jurassic; lJL ( 55 31 ( ( ( (267 ( ( ( ! D ! ( ( 28 30 E ( 43 ( 2 ((( ( d (( (d 64 2 ( ( ( lmJLm d High-angle fault, inferred ( ( ( ( d ( 0 ( lJ, Lower Jurassic; TrJ, uppermost Triassic - lowermost Jurassic 08 ( ( ( 74 (( ( ! 0 ( D ( (( ( ( 08 2 D ( 1 ( C ( ( D Porphyry ( A 0 Porphyry D ( ! © ( (( D 0 ( © r ! ( ( 70 lmJLm ( 48 Reverse fault, approximate (teeth on upper plate) ®2 24 e uTrQ ( ( 58 ( 169.1 (±0.5) ! uTrP uTrQ C e ( ( 35 uTrQ ( ( 45 É ( ( ( 45 TrJBvs r k ( 24 FFAA ( e ( ! AA f(( ( ! UU lmJLm ( e f f( UULL D36 ( Undifferentiated basaltic to rhyolitic, predominantly subaerial lavas and pyroclastic rocks including Reverse fault, inferred k # ( 247 f ( ( LLTT 33 37 ! uTrK ( ( ( TT d ( lJL g ( ( ( ( 269 50 ( JIpo ©4 d ( ( (( ( mJLm 0 ( L ash-flow and rare airfall tuffs and reworked equivalents, minor pillow lavas, breccia, hyaloclastite n ( (f( ! 10 ( JBid i ( 48 ( f ( 50 Axial trace of anticline n ( uTrK mJPf1 and pyroclastic surge deposits, locally intercalated with marine to non-marine, volcanic ( n ( ( (( ( ( ( ( ! mJPf1 ( ( f( ( ( ( f( ( o ! ( ( ( (( (( f ( ( E 07 ( ! ( uTrQ 34 ( ( ( ( 07 conglomerate, sandstone, siltstone, mudstone, impure limestone and localized debris-flow deposits.