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TitleVanderhoof Metamorphic Complex and surrounding rocks, central British Columbia
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AuthorWetherup, S; Struik, L C
SourceCordillera and Pacific margin/Cordillère et marge du Pacifique; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1996-A, 1996 p. 63-70,
PublisherNatural Resources Canada
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (1996). Cordillera and Pacific margin, Geological Survey of Canada, Current Research no. 1996-A
ProvinceBritish Columbia
NTS93G/12; 93G/13
AreaChilako River; Eulatazella Lake; Nechako River; Cluculz Lake
Lat/Long WENS-124.0000 -123.5000 54.0000 53.5000
Subjectsigneous and metamorphic petrology; structural geology; lithology; paragneisses; orthogneisses; gneisses; field relations; metamorphic rocks; faults; structural features; bedrock geology; Miocene; Pliocene; Eocene; Lower Triassic; Upper Carboniferous; ultramafic rocks; volcanic rocks; andesites; dacites; basalts; igneous rocks; limestones; sedimentary rocks; plutonic rocks; granitic rocks; deformation; metamorphism; amphibolites; Vanderhoof Metamorphic Complex; Cache Creek Group; Chilcotin Group; Ootsa Lake Group; Quanchus assemblage; Frank Lake Pluton; Tertiary; Permian; Carboniferous
Illustrationsphotographs; sketch maps
ProgramNechako NATMAP Project
Released1996 02 01
AbstractVanderhoof Metamorphic Complex is defined here as a suite of paragneiss and orthogneiss units underlying the area south and southeast of Vanderhoof, British Columbia (93F/9, 16 and 93G/5, 6, 12, 13). These rocks are in fault contact with structurally overlying ultramafic rocks and basalt of the Cache Creek Group. The fault contact is a low angle detachment that has down to the southeast motion in the central part of the exposed complex. The paragneiss of the complex has fine grained clastic rock, limestone, marl and possibly basalt protoliths. Orthogneiss of the complex is mostly biotite granite and granodiorite, which forms sills, dykes, and plutonic masses. Metamorphic grade is indeterminate from field evidence. These rocks are intruded and overlain by felsic to intermediate volcanic and intrusive rocks, probably of Tertiary age.