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TitleGeological setting of the eastern Bella Coola map area, west-central British Columbia
AuthorHaggart, J W; Mahoney, J B; Diakow, L J; Woodsworth, G J; Gordee, S M; Snyder, L D; Poulton, T P; Friedman, R M; Villeneuve, M
SourceGeological Survey of Canada, Current Research (Online) no. 2003-A4, 2003, 9 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
ProvinceBritish Columbia
NTS93D/01; 93D/02; 93D/07; 93D/08; 93D/15
AreaBella Coola River; Dean River
Lat/Long WENS-127.0000 -126.0000 53.0000 52.0000
Subjectsstructural geology; regional geology; bedrock geology; structural features; volcanic rocks; igneous rocks; sedimentary rocks; plutonic rocks; magmatism; shear zones; Hazelton Group; Monarch volcanic deposits; Stick Pass plutonic suite; Desire plutonic suite; Fougner plutonic suite; Four Mile plutonic suite; Nooskulla plutonic suite; Jurassic; Cretaceous; Mesozoic
Illustrationssketch maps; cross-sections
ProgramTargeted Geoscience Initiative (TGI-1), 2000-2003
Released2003 01 23
AbstractJurassic and Cretaceous magmatic-arc volcanic and sedimentary strata are widely distributed across the eastern Bella Coola map area (NTS 93 D) in two northwest-trending outcrop belts. (?)Lower to Middle Jurassic arc rocks, found in the east, are correlative with the youngest part of the Hazelton Group, distributed widely to the north. Lower Cretaceous volcano-sedimentary strata are found west of the principal Jurassic arc rocks and correlate with the Monarch volcanic deposits, widespread to the south. Plutonic suites of (?) Middle Jurassic, Cretaceous, and Tertiary (Paleogene) ages increase volumetrically westward across the map area. Cretaceous plutonic rocks of ca. 122-119 Ma age may be comagmatic with the Monarch assemblage. East-west extension appears to have characterized both Hazelton Group and Monarch magmatism. Northwest-trending, steeply-dipping ductile shear zones in the central and western parts of the
study area involve (?)Jurassic and (?)Cretaceous plutons but are cut by intrusions of Tertiary age.