The Oka anorthosite, lying thirty miles northwest of Montreal, was mapped with particular attention to the distribution of the anorthosite varieties present and the geological structure of these occurrences. It was found that the anorthosite varieties were irregularly distributed within the area, even within an individual outcrop. All the anorthosite was classified according to Buddington’s classification of anorthosites. Samples were collected upon which detailed petrographic studies were made. These studies included flat stage and universal stage work on the plagioclase, determination of the anorthite content of the plagioclase by means of immersion oils, and identification of the accessory minerals. Modal analyses were made on a number of thin sections to insure accuracy of naming.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.114753 |
| Date | January 1962 |
| Creators | Vaughan, William. S. |
| Contributors | Kranck, E. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Earth Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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