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dc.contributor.advisormitchell, roger h.
dc.contributor.authorxiong, jian
dc.date.accessioned2016-09-09t14:43:35z
dc.date.available2016-09-09t14:43:35z
dc.date.issued1995
dc.identifier.urihttp://knowledgecommons.lakeheadu.ca/handle/2453/769
dc.description.abstractthe coldwell alkaline complex is located on the north shore of lake superior, and consists of three centers representing three magmatic episodes. center i consists of gabbro, and layered and unlayered ferroaugite syenite. center ii consists of alkalic biotite gabbro, miaskitic nepheline syenite, amphibole nepheline syenite, perthitic nepheline syenites and recrystallized nepheline syenites. center iii consists of magnesio-hornblende syenite, ferro-edenite syenite, contaminated ferroedenite syenite, and quartz syenite. the textures and compositions of the feldspars and apatite from these three centers were examined using cathodoluminescence (cl) and the scanning electron microscope (sem). all of the colours described in the text refer to cathodoluminescence colours. the feldspars in center i consist of light blue to light violet blue, optically homogeneous alkali feldspar; braid microperthite and incipient perthi te; and irregular vein or patch perthite. the irregular vein and patch perthite contain light violet blue cryptoperthitic patches, light blue exsolved albite and dull blue exsolved k-feldspar. during late-stage fluid-induced alteration, these feldspars were replaced by violet secondary albite and purple secondary k-feldspar; and were coarsened by a deuteric antiperthitic rim. the fe-rich antiperthitic rim consists of deep red secondary albite and brown secondary k-feldpsar. the later dominates in the upper series of the layered and unlayered syenites. the homogeneous alkali feldspar crystallized at high temperatures :t!700°c, exsolved into microperthite at 650-550°c and formed irregular vein and patch perthite at 520-420°c.en_us
dc.language.isoen_usen_us
dc.subjectcathodoluminescenceen_us
dc.subjectfeldsparen_us
dc.subjectapatiteen_us
dc.subjectcoldwell alkaline complexen_us
dc.titlecathodoluminescence studies of feldspars and apatites from the coldwell alkaline complexen_us
dc.typethesis
etd.degree.namemaster of scienceen_us
etd.degree.levelmasteren_us
etd.degree.disciplinegeologyen_us
etd.degree.grantor阿根廷vs墨西哥竞猜 en_us


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