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TitleCurrent Research, Part B / Recherches en cours, Partie B
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorGeological Survey of Canada
SourceGeological Survey of Canada, Paper no. 83-1B, 1983, 456 pages, Open Access logo Open Access
Lang.English; French
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
File formatpdf
Subjectsgeneral geology
Illustrationsphotographs; block diagrams; columnar sections; correlation charts
Released1983 07 01; 2013 10 17
AbstractThe complex consists of an anorthositic basic rock suite in fault contact with an al kali syenite body. Most of the intrusion recrystallized under Lower amphibolite facies metamorphic conditions. The attitude of isomodal and mineral graded layers and distribution of stratigraphie zones illustrate that the layered basic portion was originally a funnel-shaped basin. These rocks formed as igneous cumulates that crystallized in the order ol+pl, opx, cpx. The stratigraphic section consists of ol-pl cumulates (anorthosites, troctolitic and olivine leuconorites, and olivine norites) overlain by olivine-free rocks with opx and cpx as cumulus minerals (norite, gabbro and leucocratic equivalents). The syenitic portion consists of very coarse grained alkali syenite underlain abruptly or transitionally by medium grained syenite and intruded by a quartz-bearing facies. No intrusive relationships between the basic layered rocks and syenite occur. A comagmatic origin from a basal tic parent is doubtful because of their near equal outcrop dimensions.

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