The principal object of the present work has been to construct a calorimetric apparatus capable of accurate heat of solution determinations and adaptable to use on a wide variety of minerals. In addition, to demonstrate its application, it was proposed to use this apparatus to examine the effect of surface energy on the heat of solution of quartz. The heat of solution of a substance in a given solvent, is the heat evolved or absorbed when the substance is dissolved in that solvent.

During the 1951 and 1952 field seasons, the writer was employed by the Ontario Department of Mines to carry out a geological survey on the greenstone belt in the vicinity of Lumby lake in the southeast corner of the District of Kenora, Ontario. During the 1951 season the area between Redpaint and Bar lakes was covered, and in 1952 mapping was extended southwestward to Finlayson lake and eastward to the Thunder Bay District boundary. [...]

The Munro "A" asbestos orebody is located in Munro Township, 13 miles east of Matheson in the district of Cochrane, Northern Ontario. Matheson is 206 miles by rail north of North Bay. It is also served by Highway #11 (Fergus on Highway), being 321 miles north of Toronto, and also by Highway #101, which will eventually run from Timmins, through Matheson, to the Quebec border. This road is metalled and in good condition from Matheson to the Munro Mine turn-off.

The Truro map-area, Colchester and Hants Counties, Nova Scotia, lies between latitudes 45° 15' and 45° 30' north and longitudes 63° 00' and 63° 30’ west. The area, which covers about 400 square miles, lies in the north central part of the province. The city of Truro, with a population slightly in excess of 12,000, is situated in the approximate centre of the map-sheet. Cobequid Bay, an eastward extension of the Bay of Fundy, divides the western half of the mapped area into north and south parts.

Geochemical methods in mineral exploration are devised to locate and pin-point zones containing more than normal amounts of the elements which result from the weathering and scattering of primary mineral deposits, minerals in wall rock and alteration zones. These geochemical "anomalies" are known as secondary dispersion patterns, the character of which depend upon the agent of dispersion, whether mechanical or physico-chemical, and the nature of the materials through which the process of dispersion takes place.

A large volume of literature has accumulated dealing with the problem of the limestone conglomerates of the Quebec Group. Most of the field work has been restricted to the vicinity of Quebec City, where the occurrence is not representative of the whole. The present investigation evaluates existing ideas on the origin of the conglomerate on the basis of field evidence collected mainly near Grosses Roches and also at Trois Pistoles. A new approach, the gravitational gliding hypothesis, is proposed. It is postulated that the limestone conglomerate formed as a beach talus below Lower Cambrian to Lower Ordovician limestone cliffs.

The existence of Baffin Island has been known for many years, but, since the time of the last world conflict, when its strategic importance became evident, increasing interest has been shown in its history and development. In this, no easy pattern can be followed, because of the many factors influencing the settlement of the Island. Its geographical location made it a resting place for explorers, and provided harbours for whaling fleets of earlier years. Trading posts were placed by the Hudson' s Bay Company at accessible points along the coast, and the Royal Canadian Mounted Police has, in recent years, established stations at four localities.

Twenty-three base metal deposits in Late Precambrian layered rocks of the "Labrador Trough'', 250 miles north of Knob Lake, New Quebec, are described. The metals of the deposits are copper, nickel, zinc, lead, gold and silver; not all occur in one deposit.

“Granite wash” refers to partly reworked residual material overlying the basement and underlying marine strata. Its distribution is irregular and its age varies from place to place. Recent oil discoveries have made the Granite Wash economically interesting. Representative samples from a cored wall, Gulf Clear Rills 14-10, on the northern flank of the Peace River high, were subjected to detailed petrographic examination. Only the lowest few feet of core, if any, were found to be basement, consisting of tectonized granitoid gneiss. The rock types studied indicate no mineralogical variations in the source rock, only variations in degree of crushing and hence grain size.

This report is based on the Field Work carried out by the writer during the summer of 1957, and on subsequent laboratory investigations at McGill University during the ensuing winter. The map-area forms part of the concessions in Labrador held by the Iron Ore Company of Canada. The area mapped lies within the "Labrador Trough” which oonta1ns a folded and faulted assemblage of Precambrian sedimentary series intruded by volcanic and plutonic igneous rocks. The first part of this report deals with the general character of the country and the Regional Geology. The second part is a detailed study of the Kaniapiskan (Huronian System) of upper Precambrian, west of Wabush Lake, with emphasis on the iron formation and the iron ore deposits in it.