| Title | Current Research, Part B / Recherches en cours, Partie B |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Geological Survey of Canada |
| Source | Geological Survey of Canada, Paper no. 83-1B, 1983, 456 pages, https://doi.org/10.4095/109286  Open Access |
| Image |  |
| Year | 1983 |
| Document | serial |
| Lang. | English; French |
| Media | paper; on-line; digital |
| Related | This publication contains the
following publications |
| File format | pdf |
| Subjects | general geology |
| Illustrations | photographs; block diagrams; columnar sections; correlation charts |
| Released | 1983 07 01; 2013 10 17 |
| Abstract | The 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. |
| GEOSCAN ID | 109286 |
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