A mineralogical, geochemical and geochronological study of postorogenic carbonatites in the Eden Lake complex, northern Manitoba.
| dc.contributor.author | Elliott, Barrett | |
| dc.contributor.examiningcommittee | Sherriff, Barbara (Geological Sciences) Mumin, Hamid (Department of Geology, Brandon University) | en |
| dc.contributor.supervisor | Chakhmouradian, Anton (Geological Sciences) | en |
| dc.date.accessioned | 2009-08-24T22:26:26Z | |
| dc.date.available | 2009-08-24T22:26:26Z | |
| dc.date.issued | 2009-08-24T22:26:26Z | |
| dc.degree.discipline | Geological Sciences | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | The first documented carbonatites in Manitoba occur as dykes and pods up to 15 meters in length and several meters in width at Eden Lake hosted in a post-orogenic syenitic complex within the Trans-Hudson Orogen. The carbonatites consist dominantly of calcite with lesser clinopyroxene, feldspar, apatite and titanite. Primary and xenocrystic clinopyroxene have distinct compositions, whereas xenocrystic feldspar has well-developed plagioclase and alanite rims. The whole-rock major- and trace-element composition of the carbonatite is consistent with global averages for calcio-carbonatites. Stable-isotope compositions of calcite indicate an igneous origin; the low δ13C ratios may reflect the influence of subducted sedimentary carbonate. A zircon age of 1815±8 Ma corresponds with the time of emplacement, whereas younger titanite ages reflect local thermal history. Although field relations suggest a genetic link to the host syenites, whole-rock geochemical data is incompatible with immiscibility or crystal fractionation models, suggesting a discrete mantle source for the carbonatite. | en |
| dc.description.note | October 2009 | en |
| dc.format.extent | 7860903 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/1993/3179 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Carbonatite | en |
| dc.subject | Manitoba geology | en |
| dc.subject | Trans-Hudson Orogen | en |
| dc.subject | Eden Lake | en |
| dc.subject | Alkaline rocks | en |
| dc.title | A mineralogical, geochemical and geochronological study of postorogenic carbonatites in the Eden Lake complex, northern Manitoba. | en |
| dc.type | master thesis | en_US |
| local.subject.manitoba | yes | en_US |