Date of Award


Degree Type


Degree Name

Master of Science (MS)




Dr. J. H. Crocket


Dr. H. D. Grundy


The quartz-carbonate horizon of the Kirkland Lake-Larder Lake area of Ontario is the subject of continuing controversy over its origin, and relationship with the surrounding rocks and the many gold occurrences.

Part of the essential information required is the carbonate mineralogy of the rocks. In the past the carbonate minerals have been identified by optical and presumably chemical means.

In the present study the carbonate mineralogy was determined using X-ray diffraction and scanning electron microscopic techniques. To the author's knowledge, this is the first time these techniques have been employed in an analysis of the quartz-carbonate rocks of the Kirkland Lake-Larder Lake area.

The quartz-carbonate rocks consist mainly of quartz, magnesite, dolomite, chlorite, albite and muscovite with accessory amounts of pyrite, rutile, talc and possibly leucoxene and ankerite.

A semi-quantitative estimate of the percentages of quartz, dolomite and magnesite was made using X-ray diffraction, and two series of prepared standards.

The possibility of a correlation between the carbonate mineralogy and known gold deposits was also explored. The data obtained in this study tend to tentatively suggest a positive correlation between magnesite in the quartz-carbonate rocks and the known gold deposits.

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