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Ministry of Energy Mines and Responsible for Core Review

092HNE Geological Legend

Tulameen 

STRATIFIED ROCKS

CENOZOIC

 

QUATERNARY

 

    PLEISTOCENE AND RECENT

Qal

Unconsolidated alluvial, glaciofluvial and lacustrine deposits, till, colluvium, and landslides

 

TERTIARY

   

  MIOCENE AND PLIOCENE

MPv

Plateau Basalt:  Basalt, olivine basalt, minor tuff

 

EOCENE

   PRINCETON GROUP (EPs, EPv)

EPs

Sandstone, conglomerate and argillite (includes ALLENBY FORMATION)

 

EPv

Intermediate and local mafic and felsic flows, volcaniclastics

MESOZOIC

CRETACEOUS

    MIDDLE AND UPPER CRETACEOUS

KSB

SPENCES BRIDGE GROUP:  Intermediate, locally felsic and mafic volcanics, sandstone, shale and conglomerate

 

KSBS

SPIUS CREEK FORMATION OF SPENCES BRIDGE GROUP:  Mafic volcanics

 

KS

Chert-grain sandstone and conglomerate

TRIASSIC

    UPPER TRIASSIC

   NICOLA GROUP (TNv, TNw, TNc, TNe, TNs):

TNv

Undifferentiated mafic to felsic volcanics and minor argillite

 

TNw

Western Volcanic Facies:  Felsic to intermediate pyroclastics, argillite, local carbonate

 

TNc

Central Volcanic Facies:  Intermediate feldspar and feldspar augite porphyry pyroclastics and flows, local carbonate

 

TNe

Eastern Volcanic Facies:  Mafic augite and hornblende porphyritic pyroclastics and flows (mapped as TP in the Pennask Mountain area)

 

TP

PEACHLAND CREEK FORMATION:  Feldspar porphyry subvolcanic intrusions, mafic to felsic and felsic tuffs and felsic flows

 

TNs

Sedimentary Facies:  Argillite, sandstone, tuff and local breccia and conglomerate (mapped as TW and TS in the Pennask Mountain area)

 

TW

WHISTLE CREEK FORMATION:  Massive to bedded andesitic ash and lapilli tuff, minor tuffaceous siltstone

 

TS

STEMWINDER MOUNTAIN FORMATION:  Argillite, tuffaceous siltstone and limestone, minor polymictic conglomerate and ash tuff

 

 

INTRUSIVE ROCKS

CENOZOIC

 

TERTIARY

 

    EARLY TERTIARY

eTg

Granitic intrusions (including "Otter Intrusions")

 

eTi

Intrusions of intermediate composition

 

MESOZOIC

 

CRETACEOUS

 

    MIDDLE AND LATE CRETACEOUS

mKgd

SUMMERS CREEK STOCKS:  Mainly granodiorite, some quartz monzonite and diorite

 

mKg

ALLISON CREEK STOCKS:  Mainly granite, also syenodiorite, monzonite and granodiorite

 

LATE JURASSIC AND EARLY CRETACEOUS

JKgd,g

EAGLE PLUTONIC COMPLEX:  Foliated granodiorite, muscovite-biotite granite

 

JURASSIC

 

    MIDDLE JURASSIC

mJg

OSPREY LAKE BATHOLITH:  Granite and granodiorite

 

eJgd

PENNASK AND BROMLEY BATHOLITHS:  Granodiorite

   

    EARLY JURASSIC

eJsg, c, du

TULAMEEN ULTRAMAFIC COMPLEX:  Syenogabbro, clinopyroxenite, dunite

 

eJu

Ultramafic stocks related to the TULAMEEN ULTRAMAFIC COMPLEX

 

LATE TRIASSIC AND/OR EARLY JURASSIC      

TJgd

Granodiorite, granite, quartz monzonite and minor diorite (includes Allison Lake Pluton)

 

TJd

Diorite, quartz diorite and monzonite, usually as small stocks in the NICOLA GROUP

 

TJm

Monzonite and syenite, as small stocks in the Nicola Group

 

TJqp

Pyritic quartz porphyry (altered granodiorite/ quartz diorite ?)

 

METAMORPHIC ROCKS

MESOZOIC

 

TRIASSIC

 

    LATE TRIASSIC

TNm

NICOLA GROUPAmphibolite, foliated diorite, mylonite, chlorite schist and minor limestone.  Derived from Nicola Group volcanic and sedimentary facies

 

Geological map and legend adapted from:

Dawson, G.L. and Ray, G.E. (1988):  Geology of the Pennask Mountain Area (92H/16):  Ministry of Energy, Mines and Petroleum Resources, Open File 1988-7, Scale 1:25, 000

Monger, J.W.H. (1989): Geology, Hope, British Columbia Geological Survey of Canada, Map 41-1989, sheet 1, 1:250 000.

Nixon, G.T. and Rublee, V.J. (1988):  Alaskan-type Ultramafic Rocks in British Columbia:  New Concepts of the Structure of the Tulameen Complex; in Ministry of Energy, Mines and Petroleum Resources, Geological Fieldwork 1987, Paper 1988-1, Figure 2-2-2.

Preto, V.A. (1979):  Geology of the Nicola Group between Merritt and Princeton; Ministry of Energy, Mines and Petroleum Resources, Bulletin 69, Figure 1, Scale 1:50,000.

 

See TULAMEEN (092HNE) Summary Sheet for an overview of the map area 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.