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( ! ( ! ( Vanderhoof Anahim Lake Nazko 126°W 125°W 125°W 124°W 124°W 123°W 123°W 54°N 54°N 53°30'N 53°30'N 53°N 53°N 52°30'N 52°30'N Cadwallader terrane Coast Plutonic Complex Tatla Lake Metamorphic Complex Stikine terrane Stikine terrane including Nechako basin Vanderhoof Metamorphic Complex Quesnel terrane Cache Creek terrane Stikine terrane TREK Project Area 0 20 40 60 10 km Tectonic Domains ! ! \ VICTORIA Vancouver Prince George ALBERTA Pacific Ocean BRITISH COLUMBIA TREK Project Area YUKON TERRITORY U.S.A. U.S.A. ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! 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( 125°W 125°W 124°W 124°W 54°N 53°N 53°N Nazko Vanderhoof Anahim Lake 2014 and 2015 Data Collection Locations " ) " ) X W " ) X W " ) ) W uKKv uKKha lmJH uKKvt lKS uKKr EOlEv EMJS EO MiPlCv uKKxt 65.7 167.5 HOLY CROSS ZAK CO FRED CRITCHLOW HC 6 124°56'W 124°56'W 124°58'W 124°58'W 125°W 125°W 125°2'W 125°2'W 53°50'N 53°48'N 53°48'N 53°46'N 53°46'N Holy Cross Mountain Detailed Geology of the Holy Cross Area 0 1 2 km 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 & ( ( ( ( ( ( ( 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 ( ! ( " ) X W " ) X W " ) ! ( ! ( W W W W W W ) W uKKr LJEKF uKKv mJHN uKKxt lmJHEx LKBmg uJBNv muJBs lmJHE lmJHEt MiPlCv MiPlBd EO mJHQ lmJHEb lmJHEr MLJd uJBNv muJBs MiPlCv LKBmg LKBmg mJHN Top Lake Fault Tsacha Mountain 180 74.6 165.3 155.9 178.8 68.36 67.4 70.2 KEY BUCK KEY WEST BLACKWATER BLACK BEAR HAVANA MT TSACHA BLACKWATER SOUTH TOP LAKE 125°4'W 125°4'W 125°W 125°W 124°56'W 124°56'W 124°52'W 124°52'W 53°16'N 53°16'N 53°12'N 53°12'N 53°8'N 53°8'N ( ( ( ( ( ( Laidman Batholith Blackwater Pluton Blackwater Access Road Fawnie Dome Mount Davidson Key Stock Detailed Geology of the Tsacha Mountain Area 0 3 6 km 093I 092P 093J 093F 092N 093L 093E 093D 093C 093A 093B 092O 092M 093H 093G 093K Tectonic Domains TREK Project Area 128°W 126°W 122°W 124°W 54°N 52°N 120°W 51°N 53°N 55°N National Topographic System AEROMAGNETIC CORRELATION WITH BEDROCK GEOLOGY, TREK PROJECT AREA, NORTHERN INTERIOR PLATEAU, CENTRAL BRITISH COLUMBIA Miocene to Pliocene Basalt dykes Eocene Quanchus Plutonic Suite Late Cretaceous Blackwater Plutonic Suite Quartz monzonite to monzogranite Plagioclase porphyritic diorite Jurassic to Paleogene Coast plutonic complex Late Jurassic to Early Cretaceous Francois Lake Plutonic Suite Middle to Late Jurassic Diorite and quartz diorite Early and Middle Jurassic Stag Lake Plutonic Suite Triassic to Jurassic Brooks diorite complex Reduction to pole (RTP) layer generated from total magnetic grid. The data used to generate the grid are the 2013 TREK Airborne Magnetic Survey (Aeroquest Airborne, 2014, 62.5m grid cell size, 250m line spacing) and GSC Canada-wide TMI grid (250m grid cell size). The merged grid was generated by Fathom Geophysics. -436 885 625 360 95 -170 INTRUSIVE ROCKS METAMORPHIC ROCKS EQ LKBmg LKBd JTg E LJ KF EMJS PJV TrJBd MiPlbd MLJd JKT VOLCANIC AND SEDIMENTARY ROCKS MiPlCv MiHoAv EOIEv EO uKKha uKKxt uKKvt uKKr uKKv lKBMv uJBNv muJBs mJHQ mJHT mJHN lmJHEb lmJHEr lmJHEt lmJHEx lmJHE lJHT lmJH PTrs PTrCCsv PTrCCum lKS luKNs Lake General ! ! City River Road Protected area Ar-Ar biotite Geochronology (ages in Ma) Ar-Ar whole-rock # Ar-Ar hornblende * # U-Pb zircon W X U-Pb titanite K-Ar biotite K-Ar hornblende ) K-Ar whole-rock K-Ar feldspar " J S Faults / Contacts 4 4 4 4 4 4 4 ( ( ( ( ( ( ( ( & & M M Thrust fault, approximate / inferred / interpreted from geophysics / concealed Contact, defined / approximate / inferred / interpreted from geophysics Normal fault, approximate / inferred / interpreted from geophysics / concealed Sinistral fault, approximate / inferred / interpreted from geophysics / concealed Dextral fault, approximate / inferred / interpreted from geophysics / concealed Unknown fault, approximate / inferred / interpreted from geophysics / concealed Fold axial trace, inferred / interpreted from geophysics X W Iron oxide breccias and veins P-Cu-Au-Ag-U " ) Epithermal Au-Ag: low sulphidation X W Polymetallic veins Ag-Pb-Zn+/-Au X W Cu±Ag quartz veins $ + Cu skarn ! ( Porphyry Cu ± Mo ± Au ! ( Porphyry Mo (Low F- type) # * Ultramafic-hosted asbestos # * Volcanic ash - pumice BC MINFILE Occurrences Volcanic Redbed Cu " ) Post Accretionary Miocene to Holocene Anahim volcanics Miocene to Pliocene Chilcotin Group Eocene to Oligocene Endako Group Eocene Ootsa Lake Group Upper Cretaceous Kasalka Group Andesite to trachyandesite flows Crystal-lithic tuff Vitric tuff Flow-laminated rhyolite Undifferentiated Kasalka Group Lower to Upper Cretaceous Nazko belt Skeena Group Middle Jurassic to Lower Cretaceous Bowser Lake Group Moose Lake volcanics Nechako volcanics Bowser Lake Group sediments Stikine Terrane Lower and Middle Jurassic Hazelton Group Quock Formation Tagai succession Naglico Formation Entiako Formation Basalt flows Flow-laminated dacite Lithic lapilli tuff and ash tuff Crystal lithic tuff Undifferentiated Entiako Formation Telkwa Formation Undifferentiated Hazelton Group Permian to Triassic Limestone, shale and siltstone Cache Creek Terrane Permian to Triassic Chert, argillite, basalt and limestone Serpentinized peridotite Jurassic to Cretaceous Tatla Lake metamorphic complex Permian to Jurassic Vanderhoof metamorphic complex Geoscience BC MAP 2017-06-02 MDRU MAP 13-2017 AEROMAGNETIC CORRELATION WITH BEDROCK GEOLOGY, TREK PROJECT AREA, NORTHERN INTERIOR PLATEAU, CENTRAL BRITISH COLUMBIA PART OF 1:250 000 NTS SHEETS 093 B, C, F & G J.J. Angen, M. Rahimi, C.J.R. Hart, E. Westberg, J. M. Logan and R. Kim 1:250 000 North American Datum 1983, UTM Projection, Zone 10 July 2017 0 10 20 2 mi 0 10 20 2 km Product of the Mineral Deposit Research Unit of The University of British Columbia as part of Geoscience BC’s Targeting Resources through Exploration and Knowledge (TREK) Project.This map comprises new mapping carried out during the summer of 2014 and 2015 as well as interpretation of aeromagnetic data (Aeroquest Airborne Ltd., 2014) and compilation of previous map- ping (Tipper, 1959; 1961; 1963; 1969; Diakow and Levson, 1997; Struik et al., 2007; Mihalynuk et al., 2008; Bordet, 2014; Christie et al., 2014). Geoscience BC is an independent, non-profit organization that generates earth science in collaboration with First Nations, local communities, government, academia and the resource sector. Our independent earth science enables informed resource management decisions and attracts investment and jobs. Geoscience BC gratefully acknowledges the financial support of the Province of British Columbia. The Mineral Deposit Research Unit is a collaborative venture between the mining industry and The University of British Columbia. The unit, which operates on the support and financial assistance provided by the mining industry and the Natural Sciences and Engineering Research Council of Canada, is an internationally recognized research group devoted to solving mineral explora- tion-related problems. Recommended Citation: Angen, J.J., Rahimi, M., Hart, C.J.R., Westberg, E., Logan, J.M. and Kim, R. (2017): Aeromagnetic correlation with bedrock geology, TREK project area, northern Inte- rior Plateau, central British Columbia; Geoscience BC Map 2017-06-02 and MDRU Map 13-2017, scale 1:250 000. Magnetic declination Year 2017 Latitude 53.25° N Longitude 124.5° W Model used IGRF12 17.678° E changing by 0.20° W per year ¡ ¡ M N N
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125°W
125°W
124°W
124°W54°N
53°N 53°NNazko
Vanderhoof
Anahim Lake
2014 and 2015 Data Collection Locations
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65.7
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HOLY CROSS
ZAK
CO
FRED
CRITCHLOW
HC 6
124°56'W
124°56'W
124°58'W
124°58'W
125°W
125°W
125°2'W
125°2'W
53°5
0'N
53°4
8'N
53°4
8'N
53°4
6'N
53°4
6'N
Holy Cross Mountain
Detailed Geology of the Holy Cross Area
0 1 2km
44444
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Tsacha Mountain
180
74.6
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KEY
BUCK
KEY WEST
BLACKWATER
BLACK BEAR
HAVANA
MT TSACHA
BLACKWATERSOUTH
TOP LAKE
125°4'W
125°4'W
125°W
125°W
124°56'W
124°56'W
124°52'W
124°52'W
53°1
6'N
53°1
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53°1
2'N
53°1
2'N
53°8
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53°8
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LaidmanBatholith
BlackwaterPluton
Blackwater Access Road
FawnieDome
MountDavidson
KeyStock
Detailed Geology of the Tsacha Mountain Area
0 3 6km
093I
092P
093J
093F
092N
093L
093E
093D 093C 093A093B
092O092M
093H093G
093K
Tectonic Domains
TREK Project Area
128°W 126°W 122°W124°W
54°N
52°N
120°W51°N
53°N
55°N
National Topographic System
AEROMAGNETIC CORRELATION WITH BEDROCK GEOLOGY, TREK PROJECT AREA, NORTHERN INTERIOR PLATEAU,
CENTRAL BRITISH COLUMBIA
Miocene to PlioceneBasalt dykes
EoceneQuanchus Plutonic Suite
Late CretaceousBlackwater Plutonic Suite
Quartz monzonite to monzogranitePlagioclase porphyritic diorite
Jurassic to PaleogeneCoast plutonic complex
Late Jurassic to Early CretaceousFrancois Lake Plutonic Suite
Middle to Late JurassicDiorite and quartz diorite
Early and Middle JurassicStag Lake Plutonic Suite
Triassic to JurassicBrooks diorite complex
Reduction to pole (RTP) layer generated from total magnetic grid.The data used to generate the grid are the 2013 TREK Airborne Magnetic Survey (Aeroquest Airborne, 2014, 62.5m grid cell size, 250m line spacing) and GSC Canada-wide TMI grid (250m grid cell size). The merged grid was generated by Fathom Geophysics.
-436 88562536095-170
INTRUSIVE ROCKS
METAMORPHIC ROCKS
EQ
LKBmgLKBd
JTg
ELJ KF
EMJS
PJV
TrJBd
MiPlbd
MLJd
JKT
VOLCANIC AND SEDIMENTARY ROCKS
MiPlCv
MiHoAv
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EO
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PTrs
PTrCCsvPTrCCum
lKSluKNs
Lake
General!! City
River
RoadProtected area
Ar-Ar biotite
Geochronology (ages in Ma)
Ar-Ar whole-rock#
Ar-Ar hornblende*
#
U-Pb zirconW
X U-Pb titanite
K-Ar biotiteK-Ar hornblende
) K-Ar whole-rockK-Ar feldspar"
J
S
Faults / Contacts
44 44 44 44 44 44 44
(( (( (( (( (( (( (( ((
&
&
M
M
Thrust fault, approximate / inferred / interpreted from geophysics /concealed
Contact, defined / approximate / inferred / interpreted fromgeophysics
Normal fault, approximate / inferred / interpreted from geophysics /concealed
Sinistral fault, approximate / inferred / interpreted from geophysics /concealed
Dextral fault, approximate / inferred / interpreted from geophysics /concealed
Unknown fault, approximate / inferred / interpreted from geophysics / concealed
Fold axial trace, inferred / interpreted from geophysics
XW Iron oxide breccias and veins P-Cu-Au-Ag-U") Epithermal Au-Ag: low sulphidationXW Polymetallic veins Ag-Pb-Zn+/-AuXW Cu±Ag quartz veins$+ Cu skarn!( Porphyry Cu ± Mo ± Au!( Porphyry Mo (Low F- type)#* Ultramafic-hosted asbestos
#* Volcanic ash - pumice
BC MINFILE OccurrencesVolcanic Redbed Cu")
Post AccretionaryMiocene to Holocene
Anahim volcanicsMiocene to Pliocene
Chilcotin GroupEocene to Oligocene
Endako GroupEocene
Ootsa Lake GroupUpper Cretaceous
Kasalka GroupAndesite to trachyandesite flows Crystal-lithic tuff Vitric tuffFlow-laminated rhyoliteUndifferentiated Kasalka Group
Lower to Upper CretaceousNazko beltSkeena Group
Middle Jurassic to Lower CretaceousBowser Lake Group
Moose Lake volcanicsNechako volcanicsBowser Lake Group sediments
Stikine TerraneLower and Middle Jurassic
Hazelton GroupQuock FormationTagai successionNaglico Formation
Entiako FormationBasalt flows Flow-laminated dacite Lithic lapilli tuff and ash tuffCrystal lithic tuffUndifferentiated Entiako Formation Telkwa FormationUndifferentiated Hazelton Group
Permian to TriassicLimestone, shale and siltstone
Cache Creek TerranePermian to Triassic
Chert, argillite, basalt and limestoneSerpentinized peridotite
Jurassic to CretaceousTatla Lake metamorphic complex
Permian to JurassicVanderhoof metamorphic complex
Geoscience BC MAP 2017-06-02
MDRU MAP 13-2017
AEROMAGNETIC CORRELATION WITH BEDROCK GEOLOGY, TREK PROJECT AREA, NORTHERN INTERIOR PLATEAU, CENTRAL BRITISH COLUMBIA
PART OF 1:250 000 NTS SHEETS 093 B, C, F & G
J.J. Angen, M. Rahimi, C.J.R. Hart, E. Westberg, J. M. Logan and R. Kim
1:250 000North American Datum 1983, UTM Projection, Zone 10
July 2017
0 10 202mi
0 10 202km
Product of the Mineral Deposit Research Unit of The University of British Columbia as part of Geoscience BC’s Targeting Resources through Exploration and Knowledge (TREK) Project.This map comprises new mapping carried out during the summer of 2014 and 2015 as well as interpretation of aeromagnetic data (Aeroquest Airborne Ltd., 2014) and compilation of previous map-ping (Tipper, 1959; 1961; 1963; 1969; Diakow and Levson, 1997; Struik et al., 2007; Mihalynuk et al., 2008; Bordet, 2014; Christie et al., 2014). Geoscience BC is an independent, non-profit organization that generates earth science in collaboration with First Nations, local communities, government, academia and the resource sector. Our independent earth science enables informed resource management decisions and attracts investment and jobs. Geoscience BC gratefully acknowledges the financial support of the Province of British Columbia. The Mineral Deposit Research Unit is a collaborative venture between the mining industry and The University of British Columbia. The unit, which operates on the support and financial assistance provided by the mining industry and the Natural Sciences and Engineering Research Council of Canada, is an internationally recognized research group devoted to solving mineral explora-tion-related problems. Recommended Citation: Angen, J.J., Rahimi, M., Hart, C.J.R., Westberg, E., Logan, J.M. and Kim, R. (2017): Aeromagnetic correlation with bedrock geology, TREK project area, northern Inte-rior Plateau, central British Columbia; Geoscience BC Map 2017-06-02 and MDRU Map 13-2017, scale 1:250 000.
Magnetic declinationYear 2017
Latitude 53.25° NLongitude 124.5° WModel used IGRF12
17.678° E changing by 0.20° W per year ¡¡M NN
