C OL DRAFT COPY - cmscontent.nrs.gov.bc.cacmscontent.nrs.gov.bc.ca/geoscience/Publication... · 85...

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36

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35

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37

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21

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27

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32

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83

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84

73

74

79

86

85

87

88

89

9091

75

62

6364

72

70

68

69

71

65

66

67

41

43

42

45

57-64

53-5651-52

46-47

44

49

50

199.2 (±0.8)

201.1 (±0.8)

196.7 (±0.7)

197.1 (±0.5)

234

244

391

383385

387

390393

404

335

345344

349351

365

375

414

405

413

418419

442

443

236

209

219

221223

229

247

220

206

210

226

258

407

382389

396

398

406

411

420422

367

337339

366

369370

373

295

308

313

314315

320

410412

421

426

435

441

377

417

424

425

271

254256 257

259

276277

279

290

348

331

338

342343

353

362363

381

194

176

216217

218

263

3

54

55

56

57

58

59

102

103

107

112

232

233

234

264

284

293

314

53

52

51

-6159

57

54

58

56

96

Limit of mapping

VICTORIA LAKE

PLUTON

LAKES

FAU

LT

KILPALA

KILPALA

PLUTON

MERRY WIDOW

PLUTON

RAINIER

FAULT

KWAIS

MAR

BLE

A

u cP

u Q

u Q u K

u K

u K

u K

u K

u K

u K

gdJI

u K

u K

u K

u K

gdJI

?

u K

u K

u K

u K

u K

u K

u Q

u Q

u Q

u Q

aPu

u Q

u Q

u Q

u Q

poIJ

di-poIJ

qdi-poJI

poJIu Q

u Q

u a?P

u aPJBmi f

PJBmi f Y(Pl)

A-PJBmi f (Aug)(ltl,tbr)

PJBmi f Y(Pl)

JBmi f

JIdi-qdi

u P

JBmi ltl,t-br,vbr

PJBmi f

JIdi

JIdi

JBmi f

JB

JBmi f

A-PJBmi f (Pl)(ltlx)

A-PJBmi f (Pl)(vsn,vbr)

AJBmi f

PJBmi f

JBmi f

A-PJBmi f (Pl) ,(ltlx)Y

A-PJBmi f (Pl)

JIdi

A-PJBmi f

(Pl)(ltlx)

JB

JBmi f

JIgb-qmzdi

JBmi f

JIqmzdi

JBmi f

PJBmi f

PJBmi f

JBmi f

AYJBmi f ,dbr

Pu

JIgb-qmzdi

Pu

Pu

Pu

Pu

PuQu

Qu

iJ

?

?

Qu

PJBmi f

JB

Ku

B

iJB

iJB

a

-P(PI)YPu a

AY

P(csn,pibr,ht)

u

P ltl ,t-bru

Afm -P (PI)Y

Ku Afm -P(PI)Y

Ku Afm -P (PI)Y

THR

EE

FAULT

RIV

ER

RIVER

FAUL

T

CREEK

BEN

SON

RIV

ER

CREEK

FAULT

RIVER

FAULT

JB

JB

JB

JB

JB

JB

JI

u K?

u K

u K

u K

u K

u K

u K

u Q

u Q

JB

J

KARMUTZEN

CR

EEKFAU

LT

Vmi

ltl ,t-brVmi

JBls,vsnJB

A-PJBmi f (Pl,Aug,Hb)(ltlx, vbr, vsn, vsl, sls)

A-PJBmi f(Pl,Aug)

(ltlx, vsn, vbr, vsl)Y

P-JBmi f (Pl)(vsn, vsl, txl)

P

JB ltlx, vbr,

tlvJBf

A-PJBmi f (Pl)

u K

u K

u KKu AYfm

Ku A-P(Pl)Yfm

JIpo

A A-P(Hb,Opx,Pl)fV

Ku AYfm

Ku A-P(Pl)Yfm

Ku A- (Pl)Yfm P

Ku P(Pl)Yfm

FAULT

LAKEN

IMPKISH

CLU

XEW

E

T

u P

LlK

NuK

AVT

u aP

Ku AYfm

mi P(Aug)Yu P

mi A-P(Pl)Y,u P

u P

Ku A- (Pl)Yfm P

AVT

u P u Q

P-JBmi f(Aug,Pl),ltl,tbr,vbr

P

u cPJBiAugpo

qmzdiJI

au P

diJI

PJBmi f (Pl)Y,

qmz-poJI

u cP

JBmi f (vsn,vbr)AY

u cP

PJBmi f(tbr,ltlx)

A-PJBmi f

(Pl,Aug,Ol)(vbr,vsn,ltlx)

u cP

u cP

u aP

u aP

qdi-poJI

AVT

u K

u K

Pu V

V

QuPu

Pu Vc

u K

iJB

Qu

S

Pu c

J

JI

JB

JB

u K

c

PJBmi f (Pl)Y

au P

aPu

A-PJBmi f (Pl)(tbr) A-PJBmi f (Pl)

A- (Pl)

PJBmi f (Pl)

JBf

A-P (Pl)(ltl,tbr,vsn)

AJBmi f (ltlx, vbr)

PJBmi (Pl)Y

JB Pldb

(Pl)-AY

AS,JBif f (tbr)

PJBmi f (Pl)-AY

PJBmi f (Pl)-AY

PJBmi f (Pl)-AY

a

Pu

Pu m A-P(Pl)Y,P(Ol,Aug)Y,

s

Pu s

sPu c

Pu

m P(Ol,Aug)Y

Pu ?

JBi

Pu a

a

a

Pu c

mi f

Pu c

A

A

u cP

c

u Pc

u Pc

Pu ?

Pu ?

S

JBmi f

ltl

ltlltl tbr

JB

A

JBmi f

vbr

pi pbr

Vltlx,t-br

miu PVlt ,t-br

tvlx

Qu

Pu cb

Pu a

lx A

u cP

Ku ls

Ku ls

Ku ls

u K

SNOWSADDLE

PLUTON

JB

u Pcb

JBvbr,tls

Pmi f Y(Pl)

i

T

vsn (vsl)

JB(ls, wtlv)

mitlx, vbr, cvsnf

JBmiltlx, vbr, cvsn, vsl(mi f A-P(Pl,Aug,Ol),dbr,sls)

JBmiltlx, vbr, cvsn(mi f A-P(Pl,Aug))

JBmiltlx, vbr, cvsn, csl(sls, tlv)f

JB

JB Pldbi

V

199.4 ± 3.4 Hb

197.9 ± 1.3 Ph

172.0 ± 0.6 Bi

130

129

128

132

133

131

45T

Widow

Creek

Rainier

Newt Lake

Merry

Creek

Benson Lake

RAINI

ER C

REEK

FAU

LT

u K

u Q

BEN

SON

FAULT

Qu

Pu

u K

iJB

Qu

Qu

Qu

a

Pu

Pu a

a

iJB

iJB

Pu a

74

349

375

35

40

41

42

43

44

454648

49

5051

91

114

115

189

190

295320

322

340341

55R12

R18

R19

R20R21

R9

R10R11R13

R16R17

R14

R1

R2R3

R6

R7R8

RIVER

700

600

500 40

0

300

200

197.9 ± 1.3 Ph

u Q

Kilometres0 1

INSET MAP SCALE 1 : 20 000

2

MERRY WIDOW Cu-Fe-Au SKARN CAMP

5

Outcrop examined (control)

57

22

66

54

32

30

MAP SYMBOLSGeological contact:

High-angle fault (ball on downthrown side if known)

Unconformity:

Bedding (facing known: inclined)

Bedding (facing unknown: inclined)

Primary flowage structures in volcanic rocks (inclined)

Stylolite orientation

Dike (inclined, vertical,Tertiary)

Minor fault (inclined, vertical, with plunge and trend of slickenside striations)

Plunge and trend of minor fold axes (vergence unknown)

Macrofossil locality (Tables 3, 4)

Limit of mapping

T30

definedapproximateinferred

defined

inferredapproximate

Conodont locality (Tables 5, 6)

Lithogeochemical assay locality (Table 2)

Ar - Ar mineral date (Ma ± 2 ; Hb, hornblende; Ph, phlogopite; Table 9)

8

190±2 Hb

facies boundary, inferredtrace of thin stratigraphic unit

U-Pb Zircon date (Ma ± 2 ; Table 8) 170±2

40 39

inferred

hidden

approximate

hidden

47 342R4

R5R15

aphanitic / fine-grained (<1mm)

lava flow

laminar flowage structures

ABBREVIATIONS AND NOMENCLATURE FOR

A compositional range is compounded (e.g. , mafic to intermediate)

Epiclastic* Pyroclastic Other**

VOLCANIC AND SEDIMENTARY ROCKS

where is composition, is lithology, and denotes other descriptors

f

m

mi

i

lxx l

pyroclastic brecciatuff-breccialapilli tufftuff

pillow lavapillow breccia

pbrt-brltt

f

pipibr

weldedw

vitriccrystallithic

porphyritic (1-5mm)

amygdaloidalvxl A

P

YS

hyaloclastiteh

brecciaconglomeratesandstonesiltstoneshale

limestone

brcgsnslsh

ls

Lithology:

Descriptors:

vt

l laharic

tuffaceousvolcanic

Prefixes:

Suffixes:

**

1

2

dc calcareous

debris flow

Composition:

listed below

where undivided

mafic (basaltic)intermediate (andesitic)felsic (rhyolitic-rhyodacitic-dacitic)

Volcaniclastic nomenclature after Cass and Wright (1988)

includes autoclastic and quench-fragmented products

pyroclastic or epiclastic (non-genetic)

3

volcanic and/or nonvolcanic constituents*mixed epiclastic/pyroclastic (tuffites) includes flow folds

megacrystic (>5mm<15mm)P

JB

JB

mudstonemd

s silty / sandya argillaceous

plagioclase

olivine

Pl

Olhigh-Ca clinopyroxeneAug

Stratigraphy

Least altered

Alkali metasomatized

Severely altered

Minor Intrusions

Island Plutonic Suite

Class

Classification

WHOLE - ROCK GEOCHEMISTRY LEGEND

Basalt andesite Andesite

Dacite/Rhyodacite/

Rhyolite

Alkali metasomatized

Severely altered

Major Intrusion Minor Intrusion

Alkali metasomatized

(includes flow breccia)

orthopyroxeneOpxhornblendeHb

SiO (wt %) 53 572 53 I 57 63I 63I

Basaltic

Least altered

Least altered

21 3

parentheses denote minor lithologies(sn, vbr)

BENSON LAKELIMESTONE

OLDSPORT MINE

RAVEN PIT

MERRY WIDOWPIT

KINGFISHERPITS

MARTEN

BLUEBIRD

(Pl)

mi

JBvbr, ctlx, csn, tls

(Pl)Y

u PVlt ,vbrlx

au P

JBs

JBs

JBs

JBsJBs

JBsJBs

JBs

JBw

JBs

?

JBs

JBs

JBs

JBs

JBs JBs

JBs

JBw

JBw

JBs

tbr

(Pl)

Pu cb

Base Map Information:

Recommended Citation:

References (for geology compiled outside the limit of mapping):

Roddick, J. A., and Muller, J. E. (1983): Geology Alert Bay - Cape Scott, British Columbia; Geological Survey of Canada, Map 1552A.

Massey, N. W. D., Desjardins, P. J. and Grunsky, E. C. (1994): Geological Compilation, Vancouver Island, British Columbia (92B,C,E,F,G,K,L; 102I); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1994-6.

Base 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.

Nixon, G. T., Payie, G. J., Snyder, L. D., Long, S., Finnie, A., Friedman, R. M., Archibald, D. A., Orchard, M. J., Tozer, T., Poulton, T. P. and Haggart, J. W. (2000): Geology of the Alice Lake Map Area, Northern Vancouver Island; B.C. Ministry of Energy and Mines, Geoscience Map 2000-7.

Digital Cartography: Mainly by J. L. Armitage.

JBs

68

55

5

CrossLake

NIM

PKISH

LippyCreek

ThurburnBay

Creek

Colonial

Cayeghle

NEROUTSOS

INLET

Utlu

hC

reek

VICTO

RIA

LAKE

ALICE

LAKE

Sore

nson

Creek

Jeune

Creek

Jakonaal

Teihsum

River

Kauwinch

River

How

lal Creek

Yootook

River

Benson

River

Kathleen

Lake

Benson Lake

Malook

Creek

Pinc

h

Creek

Wad

y

Craf

t

Creek

Merry

Widow Creek

Rainier

Creek

Lake

Three

LakesC

reek

Keogh

AnglerLake

ThreeIsleLake

Raging

TahsishLake

Tlakwa

Karmutzen

Kilpala

Rive

r

Clux

ewe

Rive

r

NewtLake

River

Nequilipaalis

Creek

Creek

Creek

Creek

Creek

Welch

Lakes

Tahsish

RiverKashutl

River

Ououkinsh

Marble

River

Teihsum

River

Bens

on R

iver

Creek

Tahs

ish

River

Creek

Creek

IronLake

Kwais

Creek

Power River

Lake

LAKE

Marble

Maynard

Lac

Trui

te

River

FAU

LT

B en son

Rive

r

PJBmi f -AY(Pl)

37

31

31

49

2811

18

26

22

22

73

11

33

31

25

36

85

1621

19

28

65

40

80

qdi-poJI

JB

qdi-poJI

JIqdi

JBiffA

MINFILE locality (092L 010; Table 1) 10

53

53

55

Whole-rock geochemistry locality (Tables 11, 13)(see whole-rock geochemistry legend)

R6277

u K

Qu

Qu

gb-qmzdiIJ

JB

JB

Cayu

se

u PV

MAGNETIC NORTHTRUE NORTH

1° 21'20° 46'

Approximate mean magnetic declination 2000 for the centre of the map area: 20° 46'E decreasing annually 9.8' to 2005

LOCATION MAP

Victoria

Nanaimo

VancouverPort Alberni

Campbell River

Port Alice

Port Hardy

Pacific Ocean

Vancouver Island

OlympicPeninsula

BritishColumbia

Alice Lake Map Area

CanadaUSA

Geoscience Maps

2000-5 2000-6

2000-8 2000-7

Island Copper

92L/6

Kilometres

1 0

SCALE 1 : 50 000

NTS 92L/6

Geological Survey Branch

GEOLOGY OF THE ALICE LAKE MAP AREA, NORTHERN VANCOUVER ISLAND

1 2 3 4

Ministry of Energy and MinesEnergy and Minerals Division

PALEONTOLOGYby

M. J. ORCHARD, T. TOZER, T. P. POULTON and J. W. HAGGART (Geological Survey of Canada)

GEOCHRONOLOGYby

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

GEOLOGYby

G. T. NIXON. G. J. PAYIE and L. D. SNYDER (B. C. Geological Survey)S. LONG and A. FINNIE (University of Plymouth)

G. T. NIXON, G. J. PAYIE, L. D. SNYDER, S. LONG, A. FINNIE, R. M. FRIEDMAN, D. A. ARCHIBALD,M. J. ORCHARD, T. TOZER, T. P. POULTON and J. W. HAGGART

GEOSCIENCE MAP 2000 - 7

S

GE

OLO

G I C A L

BR

I T

I S H C O L

U RV

EY

U M

BI A

LONGARM FORMATION EQUIVALENTS

LATE VALANGINIAN TO BARREMIAN

HETTANGIAN (?RHAETIAN in part) TO MID-BAJOCIAN

CARNIAN

ALERT BAY VOLCANICS

UPPER TRIASSIC

TERTIARY

LOWER CRETACEOUS

UPPER TRIASSIC TO MIDDLE JURASSIC

QUATSINO FORMATION

PARSON BAY FORMATION

KARMUTSEN FORMATION

UPPER CRETACEOUS

NANAIMO GROUP EQUIVALENTS

"BONANZA VOLCANICS"

BONANZA GROUP

VANCOUVER GROUP

(LATE) LOWER NORIAN TO RHAETIAN

CARNIAN TO (LATE) LOWER NORIAN

INTRUSIVE ROCKS

EARLY TO MIDDLE JURASSIC

MINOR INTRUSIONS

ISLAND PLUTONIC SUITE

CAMPANIAN TO ?MAASTRICHTIAN

JBf JB if

NuK

LlK

u P

u P

u P

u P

Vu P

u Q

u K

JI

iBJ

c

a

s

JsUndivided strata of the Parson Bay Formation and overlying unnamed sedimentary and volcaniclastic rocks of the Bonanza Group outside the limit of mapping.

Medium grey-green, medium to coarse-grained, laminated to very thickly bedded, plagioclase-rich lithic wacke and minor pebbly sandstone, locally graded and cross-bedded, and channel-fill mass-flow breccia with rip-up clasts.

Undivided thin to medium bedded impure limestone, calcareous to non-calcareous mudstone, siltstone, and shale intercalated with fine-grained volcaniclastic rocks including tuff and debris-flow breccia.

Calcareous facies: medium to dark grey, laminated to medium bedded impure lime mudstone, calcareous to non-calcareous siltstone and mudstone with minor shale. Locally contains colonial coral horizons and thin interbeds of crystal-lithic wacke.

Arenaceous facies: grey-green, calcareous to non-calcareous volcanic sandstone and siltstone, mudstone and shale interbedded with variable proportions of impure limestone. Locally contains vitric, lithic and crystal tuff or reworked equivalents, volcaniclastic debris-flow breccia, and minor pebbly sandstone and conglomerate.

u PcbCarbonaceous facies: black to dark grey, carbon-rich lithologies of the calcareous facies.

T

T

T

T

T

T

T

T

T

NEOGENE

Volcanic rocks: predominantly basaltic lithic tuff and tuff-breccia of phreatomagmatic origin, lesser pillow lava, hyaloclastite, and interbedded water-washed equivalents (see table of abbreviations and nomenclature).

AVT

Siliciclastic facies: dark grey to grey-green, predominantly non-calcareous, laminated to medium-bedded shale, mudstone, siltstone, sandstone and minor thin impure limestone; locally contains volcaniclastic debris-flow breccia with limestone clasts.

Undivided sedimentary and volcaniclastic strata (predominantly submarine): grey-green, thin to very thickly bedded, calcareous to non-calcareous, intercalated volcanic breccia, sandstone, and siltstone, impure limestone, mafic to intermediate lithic-crystal tuff and reworked equivalents, and minor felsic lithic-crystal-vitric tuff, feldspathic wacke, shale and volcaniclastic debris-flow breccia.

JBmiPlagioclase-megacrystic basaltic lavas locally intercalated with, and laterally equivalent to, aphanitic flows near the base of the "Bonanza Volcanics".

BsTJ

BwTJ

f P

LOWER NORIAN TO HETTANGIAN OR SINEMURIAN)

Medium to coarse-grained, equigranular granitoid rocks and porphyry; includes hornblende ± biotite-bearing gabbro (gb), diorite (di), quartz diorite (qdi), quartz monzodiorite (qmzdi), granodiorite (gd), and plagioclase ± hornblende and hornblende porphyry (po).

, subvolcanic aphanitic to porphyritic basaltic intrusions, locally columnar jointed or weakly layered: A, aphanitic; Augpo, augite porphyry; Pldb, coarsely plagioclase-phyric diabase, equivalent to plagioclase-megacrystic lavas occuring near the base of the "Bonanza Volcanics".

UNNAMED VOLCANICLASTIC-SEDIMENTARY STRATA

HETTANGIAN (?RHAETIAN in part)

(Pl)

Predominantly felsic lavas and/or pyroclastic rocks or intermediate to felsic lavas and/or pyroclastic rocks.

, basaltic to rhyolitic, predominantly subaerial lavas and pyroclastic rocks locally intercalated with marine to non-marine, coarse to fine-grained pyroclastic, epiclastic and sedimentary rocks. Subdivided according to composition and lithology (see table of abbreviations and nomenclature).

Basaltic to rhyolitic, aphanitic to porphyritic flows, flow domes and volcanic breccia and minor volcanic conglomerate (see table of abbreviations and nomenclature).

Medium to coarse-grained arkosic to lithic wacke, pebble to cobble conglomerate, siltstone and minor coal. Locally fossiliferous.

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

BTJ , lithologies are probably to in age.

Thinly bedded to massive lime mudstone; silica replacements common and rare chert nodules; rare laminated interbeds and oolitic layers; locally fossiliferous.

, aphanitic to coarsely plagioclase-phyric, commonly amygdaloidal, subaerial basaltic lava flows with minor pillow basalt, pillow breccia and hyaloclastite (see table of abbreviations and nomenclature).

, thin horizons of pale grey limestone intercalated with Karmutsen basalt near the top of the succession.

lsu KT

iBJT , subvolcanic intrusions inferred to be or in age.

RHAETIAN TO HETTANGIAN (?SINEMURIAN)

LAYERED ROCKS

JBBTJ

lsu KT

iBJTiBJ

u KT

JB

DRAFT COPY

SnowsaddleMtn.

JeuneLanding

PORTALICE

FrigonIslets

KerPoint

KetchenIsland

PulpMill

MerryWidow

Mtn

TlakwaMtn

Karmutzen

Mtn

Castle

Mtn

KARM

UTZEN

RAN

GE

127° 24' 127° 12'

127° 24' 127° 12'

50° 30'

50° 24'

50° 18'

50° 18'

50° 24'

5570

000N

68

66

67

69

73

71

72

74

75

78

76

77

79

81

82

83

84

85

86

87

88

89

5590

000N

91

92

93

94

95

96

65

64

63

64

63

65

66

67

68

69

5570000N

71

73

72

74

77

75

76

78

79

5590000N

82

81

83

84

86

85

87

88

89

95

91

92

93

94

9606 07 08 09 610000E 11 12 13 14 15 16 17 18 19 620000E 21 22 23 24 25 26 27 28 29 630000E 31 32 33 34 35 36 37 38 39 640000E 41 42

06 07 08 09 610000E 11 12 13 14 15 16 17 18 19 620000E 21 22 23 24 25 26 27 28 29 630000E 31 32 33 34 35 36 37 38 39 640000E 41 42

MountRenwick

TWIN PEAKS

5580

000N

5580000N