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25
38
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72 60
13
17
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42
47
28
75
24
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64
40
68
50
21 40
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1933
60
6462
82
78
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18
8373
63
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65
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853770
4830
1280
74
30
35
42
375280
43
38
90
40
26
40
45
34
32
60
5218
205035
42 3235 54
80
43
3515
30 80
42
25
28
27
48
37
54
5028
70
3527
45
37
202040
355060
60
7520
33
7520
19
22
25
26
16
35
80
2435
70
6530
70
38
32
21
15
7575
35 22
22
30
62 2620
36
8
30
20
19
43
48
34
17
24
2627
34
14
80
52
33
4346
80
5
30
78
3821
57
52
80
70
55
40
50
36
82
35
36
3568
50
35
5624
36
55
85
24
4076
51
18
12
30
32
25
24
30
20
32
42
40
30
35
25
26
64
25
21
85
40
1845 34
36
60
6322
28
37
40 47
22
56 78
206060
55
30
30
70
30
4639
35
15
40
25
67
73
25
47
38
77
68
80
256
13
60
68
57
29
42
85
65
36 3230
36
25
36
45
3038
27
40 70
85
8545
51
65
5535
4770
75
26
4480
35
35
37
3030
4025
20
3547
75
48
21
28
25
60 20
55
4525
28
45
45 30
30
70
82
25
23 35
45
40
3738
75
35
50
40
70
80
32
55
38
60
31
33
32
10
26
24
73
43
30
11
22
18
1126 28
49
37
3131
21
1619
50
26
75
45
2515
30
20
25 30
25
62
60
3280
85
25
3835
75
75
27
55
4028
39
33
8028
403024
4023
2740
3652
32
42
32
33 25
8032
3428
27
35
33
38
35
55
75
32
70
5
83
80-82
767778
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
