This paper contains the results of the first study of a series of diabase sills and dikes in the northern Mackenzie Mountains of northwestern Canada. The Mackenzies are, at this time, one of the least known regions of the Canadian Cordillera. [...]

It is well known that halos of altered rocks surround many deposits of sulphide and other ores. These halos are characterized by a mineralogical and, or, chemical composition which is different from that of the rocks farther away from the deposits. [...]

In general, the object of this work was to expose a low grade metamorphic rock to pressures and temperatures characteristic of higher grades of metamorphism, and observe any reactions that took place. [...]

Qualitative, semi-quantitative, and quantitative x-ray spectrometric and optical spectrographic data are given for pyrrhotite, chalcopyrite and pyrite, and qualitative and semi-quantitative data for sphalerite, from the properties in Dore lake area in the Chibougamau district, Quebec. [...]

A detailed study of certain Grenville rusty paragneisses was made. The work includes a description and discussion of the petrography; a study of the variations of certain elements in biotites, garnets and total rock with advancing metamorphism; and a classification of these rocks into Eskola's metamorphic facies. [...]

Throughout historical time men have attempted to explain the origin of mineral deposits. Many theories were presented during this period, to be contested or supported according to the experience or beliefs of the critic, but few have been discarded because the genesis of mineral deposits can be explained in many ways. This lack of agreement on the origin of mineral deposits testifies to their diversity, to the ambiguity of information we gather concerning them, and particularly to our lack of knowledge of the earth's internal structure, composition, and physical-chemical processes. [...]

During the summer of 1950 the author was employed by the Geological Survey of Canada to assist in the geological mapping of the Griffis Lake Map Area, Quebec, on a scale of one inch equals one-half mile. [...]

This work is being attempted to study the type, genesis and commercial possibilities of a series of very large bodies of massive pure quartz in the Watshishou Knoll area. The writer spent eight days during the fall of 1949 mapping the area on a scale of 1138 feet to the inch. Specimens were collected,and were subsequently studied in the laboratories of McGill University. [...]

For many years Labrador has been a land of mystery. The country is not well known, though today for economic reasons, its development is more apparent. Knowledge of the geography of the country is more complete than that of the geology. [...]

This paper is concerned with the description and illustration of stromatoporoid and favositid species collected from Silurian sediments of the Matapedia-Temiscouata region, and the determination of their stratigraphic ranges. [...]