The Mount Reed quadrangle occupies 183 square miles in southern Quebec-Labrador. It is extensively covered by glacial drift and outwash with about 5 percent exposure. The ice sheet margin retreated northwards. The most extensive rock type is the biotite-quartz-oligoclase gneiss with garnetiferous and graphitic varieties. The gneiss consists of maficrich foliations of biotite and miner hornblende and felsicrich foliations of white quartz and oligoclase. [...]

It was proposed to make an investigation of the terrestrial heat flow in the area about Montreal using boreholes drilled to explore for gas or oil. A fairly satisfactory D.C. thermistor bridge method of measuring temperatures at depth has been developed and three boreholes have been surveyed.

The writer takes this opportunity to acknowledge the encouragement and guidance received from Dr. V.A. Saull under whose direction these experiments were carried out. The interest shown and suggestions offered by the writer is colleagues are greatly appreciated. Financial assistance was received through Research Grant number 26-53 awarded to Dr. Saull by the Geological Survey of Canada.

The present study is concerned with the description and petrogenesis of a group of basic and ultrabasic intrusive rocks in the District of Cochrane, Ontario. It includes descriptions of localities where exposures are good or considered to be petrogenetically significant and petrographic descriptions of the intrusive rocks. Comparisons are made with other basic and ultrabasic rock occurrences.

This thesis describes the design, construction and operation of an apparatus for experimentation with small, cylindrical samples under conditions of high temperature and pressure in the presence of fluids. It is also possible to deform the sample while subjected to these "hydrothermal" conditions by developing a differential which can produce either shearing or tensional phenomena. Both open and closed systems can be employed. [...]

The material presented in the body of this thesis is the result of petrographic and mineralographic studies carried out on specimens of peridotite and their associated rock types from various localities in Northern Quebec and Ungava. The major portion of the examination was of a petrographic nature, although a limited amount of polished section work was done on sulphide bearing specimens of ultrabasic rock from some of these same areas.

The presence of sulphide mineralization in the Bathurst-Newcastle area of New Brunswick has been known since early in the nineteenth century. Lindeman (1917) discussed the iron ore deposits in the area and mentioned that pyrite was found along the footwall of one iron deposit. In later years sporadic work was carried out, but it was concerned mainly with the iron ore and regional mapping (Alcock 1941).

The general geology of an area of 50 square miles comprising the western half of La Motte township, Abitibi County, Quebec, is described. Peridotites and dunites occur as sills in Early Precambrian volcanic and sedimentary rocks. The belts of rock constitute part of the northern limb of a major anticlinorium. Granitic rocks of the Preissac-La Motte-La Corne batholithic complex probably derived from a common magma chamber occupy about 75 per cent of the map-area. The younger muscovite- and biotite-bearing quartz monzonite masses contain a higher percentage of potash feldspar than the biotite granodiorite masses.

The rapid depletion of iron ore reserves in the Lake Superior region, coupled with increased blast furnace efficiencies resulting from the use of high grade iron ore concentrates, has created considerable interest in the development of low grade iron deposits throughout North America. As a result, the low grade magnetite deposits of the "Grenville" region of eastern Ontario and western Quebec have received considerable attention, and several large deposits such as the Marmora and Hilton mines have recently been brought into production. With this in mind, the writer was commissioned by Hull Iron Mines, Ltd., of Montreal to investigate a group of small magnetite deposits north of Hull, Quebec, which they are presently developing.

This thesis presents the results of a reconnaissance seismic program carried out by the Geophysics Division of the Geological Survey of Canada during the months April to August, 1960, in the Queen Elizabeth Islands, N. W. T. The seismic investigations were a part of a continuing, comprehensive, Arctic research program directed by the Polar Continental Shelf Project (P.C.S.P.). The P.C.S.P. was created by a Federal Cabinet directive in 1959 and is a division of the Department of Mines and Technical Surveys. The seismic operations in the summer of 1960 were of a preliminary and reconnaissance nature designed to measure the thickness of the sedimentary section in as many localities as possible and to lay the foundations for detailed investigations in following years.