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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ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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14?14
1414
1589
8?
14
14
6?12
12
12
14
6
2
4?
3
4?
1414
14
121114
9 10
148
1412
9
14
12
13
14
3
3?
2
2
9
2
5
3
3
3
15
15
14
99
8
8
12
3
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
169.1 (±0.5)
169.6 (±0.4)
160-170
200 (± 2.1)
......................... .........................
.........................
..................................................
.........................
.........................
.........................
.........................
..................................................
.........................
165.1 (± 2.8) Hb
ca.145-150 Alca.145-150 Al
ca.160-167 Al
ca.161 Al
176 (± 3) Hb
173 (± 2) Hb170 (± 2) Sc
165 (± 14) Hb
165.6 (± 3.6) Hb
177.0 (± 6.4) Hb
80
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54
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82
66
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57
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26
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87
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28
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31
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52
20
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34
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38
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30
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29
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35
40
44
7542
52
56
28
25
5040
24
20
1040
55
75
17
38
25
25
10
17
50
16
50
35
25
55
3770
58
26
46
50
7055
25
4442
30
41
67
75
62
27
46
35
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42
28
2242
13
29
37
14
32
43
28
30
335
33
75
33
33
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D
74
67
B
A
AB
B
A
A
A
B
B
A
A
A
A
B
A
BA
A
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A
AB
A
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70
62
85
82
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74
60
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60
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57
55
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44
56
78
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52
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66
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25 70
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57
26
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5
55
59
34
54
50
54
90
90
45
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70
63
75
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47
17
70
40
90
54
2
2
2
4
2
2
2
2
22
2
42
24
3
2
22
2
2
2
3
24
2
2
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2
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212
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10
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9
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54
26
35
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45
14
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fffffffffffffffffffffffff
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WanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokanaWanokana
HushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuHushamuPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPluton
PlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPlutonPluton
FAULTFAULTFAULT
FAULTFAULT
FAULTFAULTFAULT
FAULT
WANOKANA
WANOKANA
WANOKANA
WANOKANA
WANOKANA
WANOKANA
WANOKANA
WANOKANA
WANOKANA
FAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULT
FAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULT
HOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERG
FAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULT
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NAHWITTI
NahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwittiNahwitti
BatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholithBatholith
GoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedGoodspeedPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyry
PorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyryPorphyry
FAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULTFAULT
BROWNING
BROWNING
BROWNING
BROWNING
BROWNING
BROWNING
BROWNING
BROWNING
BROWNING
SPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCERSPENCER
MtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtMtBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandesBrandes
STRANBY
STRANBY
STRANBY
STRANBY
STRANBY
STRANBY
STRANBY
STRANBY
STRANBY
FAULTFAULTFAULT
FAULTFAULT
FAULTFAULTFAULT
FAULT
WILLIAM
WILLIAM
WILLIAM
WILLIAM
WILLIAM
WILLIAM
WILLIAM
WILLIAM
WILLIAM
FAULT
FAULT
FAULTFAULT
FAULTFAULT
FAULT
FAULT
FAULT
Pemberton
Hills
HOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERGHOLBERG
McIntoshMount
Peak
Nose
PlumperHill
HARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURHARBOURWINTERWINTERWINTERWINTERWINTERWINTERWINTERWINTERWINTER
MountKains
Mount
Hansen
(Not Mapped)
Flat TopMountain
(Not Mapped)
(Not Mapped)
(Not Mapped)
Brandes
Mount
Radome
Sound
Holberg
BayJules
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Creek
Cree
k
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rg
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ino
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r
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k
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ekH
elpe
r
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Goodspeed
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MondayRocks
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Ahwhichaolto
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CreekCreek
Botel Lake
WedelIsland
Creek
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PointKains
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HuntIslets
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leo
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50° 30'
50° 36'
50° 42'
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.
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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
mJPf1/2
Lvs
Ls
lJVx
Lf
Lm
uTrPv
uTrKls
Lv
Lp
uKus
lKL
uKBcg
uKBsn
L
lJHs
TrJBvs
uTrP
uTrQ
uTrK
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
Tif
JBif
JBi
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)
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MINFILE locality (102I 010/92L 10)
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6 Late Triassic
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E Cleavage, fault-related, inclined
Dike, inclined, verticalB
Lineation (slickenfibres on fault plane)
1 Late Cretaceous2 Early Cretaceous (Hauterivian)
2
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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
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
Ar40/Ar39 mineral date (Ma, 2 sigma error);Panteleyev et al. (1995); Al, alunite; Sc, sericite
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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
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32A
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57
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Holberg - Winter Harbour Area92L/12W, 102I/8,9
Geoscience Maps
2006-4 2006-1
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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
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