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Ministry of Energy Mines and Responsible for Core Review

093N Geological Legend

 

Manson River

LAYERED ROCKS

EAST OF THE PINCHI FAULT

CENOZOIC
     QUATERNARY

Qal

Unconsolidated glacial till and alluvium
TERTIARY

Tsb

Basalt, volcanic wacke and fossiliferous volcanic ash-rich mud
CENOZOIC AND MESOZOIC
     CRETACEOUS TO TERTIARY(?)
KTvs Plagiociase+homblende±biotite, quartz-eye rhyolite tuff and flow, minor mafic lapilli tuff, siltstone, sandstone, quartzofeldspathic conglomerate
KTu USLIKA FORMATION: conglomerate, sandstone, siltstone and mudstone; minor coal
MESOZOIC

UTJu

TAKLA GROUP (muTsc - IJTC): undivided
JURASSIC
     LOWER JURASSIC

lJTC

TWIN CREEK FORMATION: heterolithic lapilli tuff, plagioclas±quartz porphyritic flows and agglomerate/tuff breccia

lJCL

CHUCHI LAKE FORMATION: plagioclase±augite porphyry flows and fragmental volcanics
TRIASSIC
     UPPER TRIASSIC

uTP

PLUGHAT MOUNTAIN FORMATION: predominantly green augite±plagioclase porphyritic basalt flows and fragmentals, maroon basalt, pillow basalt, amygdaloidal olivine porphyritic basalt, heterolithic lapilli tuff, volcanic sandstone and siltstone, and limestone
uTWL WITCH LAKE FORMATION: green and maroon, augite±plagioclase and homblende, plagioclase porphyritic flows and volcaniclastics
uTWG WILLY GEORGE SEQUENCE: augite-plagioclase lapilli tuff, crystal tuff, sedimentary breccia, arkose/wacke, argiffite, siltstone
uTrIL INZANA LAKE FORMATION: green tuff, lapilli tuff, grey siltstone and slate
uTRC RAINBOW CREEK FORMATION: grey slate, thin-bedded siltstone, minor volcaniclastic sediments
MIDDLE TO UPPER TRIASSIC
muTSC SLATE CREEK FORMATION: grey slate, siltstone, argillite, and limestone
PALEOZOIC
     PENNSYLVANIAN TO PERMIAN

PPNC

NINA CREEK GROUP: undivided Mount Howell and Pillow Ridge formations; grey to black argiffite, green and red ribbon chert, diabase sills, pillow basalt±variolites, diabase-gabbro sills, within Manson fault zone, may contain Manson Lakes Ultramafites
MISSISSIPPIAN TO PERMIAN

MPLR

LAY RANGE ASSEMBLAGE: green and maroon augite±plagiociase and augite±olivine porphyritic basalt, crystal and lapilli tuff, volcanic sandstone, siltstone, sificeous argillite, chert and quartzite-bearing grit
PALEOZOIC AND PROTEROZOIC
     UPPER PROTEROZOIC TO PERMIAN

PPNA

UNDIVIDED INGENIKA, ATAN, RAZORBACK MOUNTAIN, ECHO LAKE, OTTER LAKES, BOULDER CREEK, BIG CREEK AND COOPER RIDGE GROUPS: miogeoclinal rocks (of North American affinity) dominated by siliciclastics; quartzite, impure quartzite, limestone, argillite and wacke
PROTEROZOIC
      UPPER PROTEROZOIC

PWC

WOLVERINE COMPLEX: amphibolite and calcsilicate gneiss, schist, marble, granodiorite and pegmatitic dikes and sills (intrusive bodies are Cretaceous to Tertiary in age)

LAYERED ROCKS

WEST OF THE PINCHI FAULT

CENOZOIC
     QUATERNARY

Qal

Unconsolidated glacial till and alluvium
MESOZOIC
TRIASSIC
          UPPER TRIASSIC

uTrKS

UNDIVIDED KUTCHO AND SINWA FORMATIONS: andesitic flows, tuffs and breccias with minor mafic intrusions, chlorite and hornblende schists, minor argillite, chert and limestone

uTrS

STUHINI GROUP: mafic and intermediate flows and tuffs, tuffaceous wackes, bladed plagioclase porphyry, siltstone, limestone, and minor shale
MESOZOIC AND PALEOZOIC
     CARBONIFEROUS TO JURASSIC

CJCC

CACHE CREEK COMPLEX: ribbon chert, limestone, argillaceous quartzite, argillite, slate, maric intrusions, minor conglomerate, greywacke and metamorphosed equivalents

INTRUSIVE ROCKS

MESOZOIC
CRETACEOUS
MIDDLE TO LATE CRETACEOUS

KGB

GERMANSEN BATHOLITH: coarse-grained granite, granodiorite, related pegmatitic phases and aplite dikes (includes the Klawli stock)
JURASSIC
     EARLY JURASSIC
EJM MOUNT MILLIGAN INTRUSIVE COMPLEX: granite, hornblende granite and monzonite; contains minor granitic intrusions of Cretaceous and Tertiary(?) age
EJT TOPLEY INTRUSIONS: granodiorite, quartz diorite, diorite, minor granite, syenite, gabbro and pyroxenite
TRIASSIC AND CRETACEOUS
     LATE TRIASSIC TO EARLY CRETACEOUS

TrKH

HOGEM INTRUSIVE COMPLEX: medium to coarse-grained syenite, monzonite, quartz monzonite, granodiorite and diorite; JKu: undivided contemporaneous intrusions
TRIASSIC TO JURASSIC
LATE TRIASSIC TO EARLY JURASSIC

TJvc

VALLEAU CREEK COMPLEX: fine to coarse-grained diorite, gabbro, pyroxenite and homblendite
MESOZOIC AND PALEOZOIC
MISSISSIPPIAN TO TRIASSIC
MTro OCEANIC ULTRAMAFITES: peridotite, dunite, minor pyroxenite and serpentinite
Geological map and legend derived from:

Armstrong, J.E. (1949): Fort St. James Map-area, Cassiar and Coast Districts, British Columbia; Geological Survey of Canada, Memoir 252, Map 907A, Scale 11:380,160.

Ferri, F. and Melville, D.M. (1994): Bedrock Geology of the Germansen Landing - Manson Creek Area (94N/9, 10, 15; 94C/2); B.C. Ministry of Energy, Mines and Petroleum Resources, Bulletin 91.

Garnett, J.A. (1978): Geology and Mineral Occurrences of the Southern Hogem Batholith; B.C. Ministry of Energy, Mines and Petroleum Resources, Bulletin 70, Scale 1:125,000.

Nelson, J.L., Bellefontaine, K.A., Green, K.C. and MacLean, M. (1991): Geology and Mineral Potential of the Wittsichica Creek and Tezzeron Creek Map Areas (93N/I; 93K11 6); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1991-3, 4 map sheets, Scale 1:50,000.

Nelson, J.L., Bellefontaine, K.A., MacLean, M. E. and Rees, C.J. (1992): Geology and Mineral Potential of the Chuchi Lake and Klawli Lake Map Areas (93N/2E; 7E); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1992-4, 2 map sheets, Scale 1:50,000.

Nelson, J.L., Bellefontaine, K.A., Mountjoy, K.E. and MacLean, M.E. (1993): Geology and Geochernistry of the KlavAi Lake Map Area (93N[7W); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1993-3, 1 map sheet, Scale 1:50,000.

Bailey, D., Nelson, J.L., Bellefontaine, K.A. and Mountjoy, K.E. (1993): Geology and Geochemistry of the Kwanika Creek Map Area (93N/I I E); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1993-4, 1 map sheet, Scale 1:50,000.

Nelson, J.L., Bellefontaine, K.A., Mountjoy, K.E. and MacLean, M.E. (1993): Geology and Geochernistry of the Discovery Creek Map Area (93N/1 4E); B.C. Ministry of Energy, Mines and Petroleum Resources, Open File 1993-5, 1 map sheet, Scale 1:50,000.

Wheeler, J.O. and McFeely, P. (compilers) (1991): Tectonic Assemblage Map of the Canadian Cordillera and Adjacent Parts of the United States of America; Geological Survey of Canada, Map 1712A, Scale 1:2,000, 000.

See  Manson River (093N) Summary Sheet for an overviews of the map areas and additional regional references.

Positions of all geological contacts are approximate. In the case of an apparent disagreement between an occurrence’s geological location on the map and its stratigraphic setting given in the MINFILE documentation, the latter should be given priority.