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PlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPluton

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FAULTFAULT

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WANOKANA

WANOKANA

WANOKANA

WANOKANA

WANOKANA

WANOKANA

WANOKANA

WANOKANA

WANOKANA

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HOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERG


NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NAHWITTI

NahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwitti

BatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholith

GoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyry

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BROWNING

BROWNING

BROWNING

BROWNING

BROWNING

BROWNING

BROWNING

BROWNING

BROWNING

SPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCER

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STRANBY

STRANBY

STRANBY

STRANBY

STRANBY

STRANBY

STRANBY

STRANBY

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WILLIAM

WILLIAM

WILLIAM

WILLIAM

WILLIAM

WILLIAM

WILLIAM

WILLIAM

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FAULT

FAULTFAULT

FAULTFAULT

FAULT

FAULT

FAULT

Pemberton

Hills

HOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERG

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Nose

PlumperHill

HARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURWINTERWINTERWINTERWINTERWINTERWINTERWINTERWINTERWINTER

MountKains

Mount

Hansen

(Not Mapped)

Flat TopMountain

(Not Mapped)

(Not Mapped)

(Not Mapped)

Brandes

Mount

Radome

Sound

Holberg

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Inlet

Bish

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k

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Harbour

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ekH

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River

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Quatsino

Hathaway

Inlet

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PointKains

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127° 48'128° 00'

128° 00'

127° 48'

50° 30'

128° 12'

50° 36'

128° 12'

50° 42'

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G.T. Nixon, J.L. Hammack, V.M. Koyanagi, G.J. Payie, L.D. Snyder, A. Panteleyev, N.W.D. Massey, D.A. Archibald, J.W. Haggart, M.J. Orchard, R.M. Friedman, T. Tozer,

H.W. Tipper, T.P. Poulton, J. Palfy, F. Cordey and D.J. Barron

GEOLOGY

NTS 92L/12W, 102I/8, 9

GEOCHRONOLOGY

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)

BC Geological SurveyGEOSCIENCE MAP 2006-3

by

by

J.W. HAGGART (Geological Survey of Canada), D.A. ARCHIBALD (Queen's University)

D.A. ARCHIBALD (Queen's University)R.M. FRIEDMAN (The University of British Columbia)

Geology of the Holberg - Winter HarbourArea, Northern Vancouver Island

PALEONTOLOGY

M.J. ORCHARD, T. TOZER, H.W. TIPPER, T.P. POULTONJ.W. HAGGART (Geological Survey of Canada)J. PALFY (Hungarian Natural History Museum)

F. CORDEY (University of Lyon)

by

and pyroclastic surge deposits, locally intercalated with marine to non-marine, volcanicconglomerate, sandstone, siltstone, mudstone, impure limestone and localized debris-flow deposits.

Plagioclase-megacrystic basaltic to andesitic lavas locally intercalated with, and laterallyequivalent to, aphanitic and plagioclase-phyric flows near the base of the LeMare LakeVolcanics; locally forms pillow lavas (LVpx).

Hettangian (or possibly Rheatian to Sinemurian) (Holberg - Winter Harbour Area)

Volcaniclastic and volcanic lithologies: predominantly basaltic to andesitic epiclastic waterlain breccias and tuffs, includes lithic lapilli tuff and tuff-breccia of phreatomagmatic origin; minor pillow lava and hyaloclastite; locally interbedded fine-grained volcaniclastic and sedimentary rocks.

(late) Early Norian to Rhaetian or ?Hettangian (Holberg - Winter Harbour Area)

Interbedded volcaniclastic and lesser sedimentary strata (predominantly submarine): buff to grey-green, thin to very thickly bedded, calcareous to non-calcareous, volcanic breccia, lithic and feldspathic wacke, siltstone and impure limestone; lithic-crystal tuff, lapilli tuff and reworked equivalents; and minor vitric tuff, pebbly sandstone, shale and volcaniclastic debris-flow breccia.

Rhaetian to Hettangian or ?Sinemurian (Holberg - Winter Harbour Area)VOLCANICLASTIC-SEDIMENTARY UNIT

PARSON BAY FORMATIONMedium grey to black, laminated to medium bedded impure limestone, calcareousto non-calcareous mudstone, siltstone, and shale, locally intercalated with minor grey-green lithic wacke, feldspathic wacke, lithic, crystal and vitric tuff and reworked

Mainly rhyolitic or dacitic to rhyolitic lavas and/or pyroclastic rocks, including flow and pyroclastic breccias, welded to non-welded crystal-lithic lapilli tuffs and rare airfall tuffs;may include thin interbedded sedimentary deposits.

Thinly bedded to massive sandstone, siltstone, mudstone, pebble conglomerate and minor coal; locally fossiliferous.

Age designation: mJ, Middle Jurassic; lmJ, Lower and/or Middle Jurassic;

Undifferentiated basaltic to rhyolitic, predominantly subaerial lavas and pyroclastic rocks includingash-flow and rare airfall tuffs and reworked equivalents, minor pillow lavas, breccia, hyaloclastite

Mainly basaltic to andesitic pillow lava; may include pillow breccia, hyaloclastite andreworked equivalents.

phreatomagmatic deposits; may include rare lava flows.

lJ, Lower Jurassic; TrJ, uppermost Triassic - lowermost Jurassic

Mainly sedimentary strata including impure limestone, calcareous to non-calcareous mudstone, shale, siltstone, sandstone and tuffaceous equivalents.

Mainly basaltic to andesitic volcanic breccia of epiclastic and pyroclastic origin, and variably reworked lithic-crystal tuff; locally fine-grained sedimentary interbeds.

Rhyolitic lavas and ash-flow tuffs with minor intercalated epiclastic deposits; subunits1 and 2 may represent separate stratigraphic units separated by basalt-andesite lavas(mJL/Pm) or the same unit repeated by intrusion/faulting in the Hushamu Creek valley.

LEMARE LAKE VOLCANICS (subdivided by lithotype)

UPPER TRIASSIC (CARNIAN) TO MIDDLE JURASSIC (MID-BAJOCIAN)

LAYERED ROCKSUPPER CRETACEOUS

LOWER CRETACEOUSLate Valanginian to BarremianLONGARM FORMATION EQUIVALENTS

BONANZA GROUPRhaetian or Hettangian to mid-Bajocian (Holberg - Winter Harbour Area)

BLUMBERG FORMATION

Mainly basaltic to andesitic lava flows with minor intercalated volcaniclastic and sedimentary lithologies similar to Lvs; locally includes minor pillow lava and breccia.

Interbedded volcaniclastic and sedimentary strata, includes lithic and crystal-lithic lapilli tuffs and reworked equivalents, pyroclastic and epiclastic volcanic breccias,sandstone, siltstone, mudstone, impure limestone, and minor debris-flow and

Cenomanian or Early Turonian to ?Santonian

Cenomanian to ?Turonian

KARMUTSEN FORMATIONCarnian

Medium to pale grey, thinly bedded to massive micritic limestone and locally bioclastic limestone; minor silica replacements and chert nodules; rare laminated interbeds, oolitic layers and algal mats; locally fossiliferous.

Trend/locality of thin grey limestone beds and lenses intercalated with basaltnear the top of the succession.

UPPER TRIASSICVANCOUVER GROUP

Carnian to (late) Early Norian (Holberg - Winter Harbour Area)QUATSINO FORMATION

SHALE UNIT

Massive to thinly bedded lithic to arkosic wacke with minor pebble to cobble conglomerate.

Dark grey, calcareous to non-calcareous siltstone and impure limestone interbedded with subordinate wacke and minor pebble conglomerate.

Massive conglomerate with minor lenses of coarse-grained lithic wacke.

Aphanitic to plagioclase-phyric and locally plagioclase-megacrystic basaltic lava flows, commonly amygdaloidal; predominantly subaerial flows in the upper part of the succession; may include minor pillow lava, breccia and hyaloclastite.


equivalents and volcaniclastic breccia, and rare pebbly sandstone, conglomerate and debris-flow deposits; calcareous facies locally contain colonial coral horizons; organic-rich facies comprise carbonaceous to graphitic shales, mudstone and limestone; locally abundant fossils.

QUEEN CHARLOTTE GROUP EQUIVALENTS (IN PART)

Victoria Lake Megacrystic Basalt

Middle Jurassic (mid-Bajocian)Pemberton Hills Rhyolite

Dark grey, weakly to non-calcareous siltstone and fine-grained sandstone; locallyfossiliferous; only known exposures confined to the south shore of Holberg Inlet.

HettangianHOLBERG SILTSTONE

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Medium to coarse-grained, equigranular granitoid rocks and porphyry;includes hornblende +/- biotite-bearing diorite (di), quartz diorite (qdi),plagioclase +/- hornblende porphyry (po) and minor quartz monzonite/monzodiorite (qm) and granodiorite (gd).

INTRUSIVE ROCKS

Subvolcanic basaltic to andesitic, aphanitic to porphyritic intrusions:d: diabase; dp: plagioclase-phyric diabase.

Subvolcanic rhyolite dikes, sills and intrusive complexes.

Rhyolite sill complex possibly equivalent to Alert Bay Volcanics.

EARLY TO MIDDLE JURASSIC

TERTIARY (?Neogene)

ISLAND PLUTONIC SUITE

Minor Intrusions

JI

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JBif

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Primary flow lamination in volcanic rocks, inclined, vertical

Reverse fault, approximate (teeth on upper plate)

High-angle fault, defined (block on downthrown side if known)

7 Early Jurassic (Late Pliensbachian - Toarcian)

Ar40/Ar39 hornblende (Hb) date (Ma, 2 sigma error)

5 Late Triassic (Carnian - Late Carnian)

2 Early Jurassic

1 Late Triassic (Rhaetian)2 Late Triassic (Late Norian)3 Late Triassic (Middle Norian)

1 Early Jurassic (Hettangian - Sinemurian)

4 Late Triassic (Early Norian)

3 Jurassic4 Late Triassic (Late Carnian - Middle Norian)

.........................

MINFILE locality (102I 010/92L 10)

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Dike, inclined, verticalB

Lineation (slickenfibres on fault plane)

1 Late Cretaceous2 Early Cretaceous (Hauterivian)

2


Bedding, inclined, vertical#

Welding, inclinedE

>

10 Early Jurassic (Early Sinemurian)

6 Early or Early - Middle Jurassic

8 Early Jurassic (Sinemurian - Pliensbachian)9 Early Jurassic (Late Sinemurian)

11 Early Jurassic (Middle Hettangian)12 Late Triassic (Late Norian)

14 Late Triassic13 Late Triassic (Late Carnian)

3 Early Cretaceous (Valanginian)

5 Late Jurassic - Early Cretaceous4 Early Cretaceous


Ar40/Ar39 mineral date (Ma, 2 sigma error);Panteleyev et al. (1995); Al, alunite; Sc, sericite

.........................

Limit of mapping

U-Pb zircon date (Ma, 2 sigma error)

Outcrop examinedd

Outcrop too small to show at map scale(

GSC macrofossil locality (ages as above)

010/10

GSC conodont locality (ages as above)

Plunge of primary flow fold axis

Primary flow fold with dip of axial plane40

Radiolaria locality (with indicated age)

Macrofossil locality (with indicated age)

Reverse fault, inferred

5

Conodont locality (with indicated age)

Geological contact, inferred

MAP SYMBOLSGeological contact, definedGeological contact, approximate

Axial trace of syncline

Plunge of minor fold axis Minor fold with dip of axial plane

Axial trace of anticline

High-angle fault, approximateHigh-angle fault, inferred

Unconformity, approximateUnconformity, inferred

Roads, paved

167 (± 6) Hb

200 (± 2)

167 (± 6) Al

Roads, dirt

5

2

1

9

70


©©©©©©©©©©©©©©©©©©©©©©©©©

15

30

32A

40

D!54

57

64

22

Holberg - Winter Harbour Area92L/12W, 102I/8,9

Geoscience Maps

2006-4 2006-1

2006-3 2006-2

USACanada

Vancouver

Victoria

Peninsula

BritishColumbia

Olympic

NanaimoPort Alberni

Campbell River

Vancouver Island

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Pacific Ocean

Port Alice

Port Hardy

Port McNeill

Muller, J.E. and Roddick, J.A. (1983): Alert Bay - Cape Scott; Geological Survey of Canada, Map 1552A, scale 1:250 000.

Muller, J.E., Northcote, K. E. and Carlisle, D. (1974): Geology and mineral deposits of Alert Bay-Cape Scott map area,Vancouver Island, British Columbia; Geological Survey of Canada, Paper 74-8.

Panteleyev, A., Reynolds, P. H. and Koyanagi, V.M. (1995): 40Ar/39Ar ages of hydrothermal minerals in acid sulphate-altered Bonanza volcanics, northern Vancouver Island (NTS 92L/12); in Geological Fieldwork 1994, BC Ministry of Energy, Mines and Petroleum Resources, Paper 1995-1, pages 61-65.

Jeletzky, J.A. (1976): Mesozoic and ?Tertiary rocks of Quatsino Sound, Vancouver Island, British Columbia; GeologicalSurvey of Canada, Bulletin 242, 243 pages.

Massey, N.W.D., McIntyre, D.G., Desjardins, P.J. and Cooney, R. T. (2005): Digital geology map of British Columbia: wholeprovince; BC Ministry of Energy, Mines and Petroleum Resources, Geofile 2005-1.

References

Magnetic Declination

NNM

Approximate mean magnetic declination 2005 for centre of map area: 19 degrees

40 minutes east decreasing annually 13 minutes per year

Base Map InformationBase map has been produced from digital TRIM (Terrain Resource Inventory Management) 1:20 000 topographic database provided by the British Columbia Ministry of Environment, Lands and Parks.

North American Datum (NAD) 1983. Universal Transverse Mercator Projection (Zone 9). Elevation in metres above mean sea level. Contour interval 100m. Nixon, G.T., Hammack, J.L., Koyanagi, V.M., Payie, G.J., Snyder, L.D., Panteleyev, A., Massey, N.W.D.,

Archibald, D.A., Haggart, J.W., Orchard, M.J., Friedman, R.M., Tozer, T., Tipper, H.W., Poulton, T.P.,Palfy, J., Cordey, F. and Barron, D.J. (2006):Geology of the Holberg - Winter Harbour area, northern Vancouver Island; BC Ministry of Energy,Mines and Petroleum Resources, Geoscience Map 2006-3.

Recommended Citation

4

kilometresScale 1:50 000

0 2

K.A. JohnstonDigital Cartography:

Data CompilationG.T. Nixon, K.A. Johnston and M.C. Kelman

BC Geological Survey GEOSCIENCE MAP 2006-3 Geology of the ...cmscontent.nrs.gov.bc.ca/geoscience/PublicationCatalogue/Geoscie… · 93 74 98 245 77 244 271 185 240 79 78 247 181 80

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