During the summer of 1955 the author was employed by Bellechasse Mining Corporation to make a geological map of a group of 77 claims and to supervise a Packsack drill programme on mineralized showings at Pegma Lake. Aeromagnetic anomalies were checked and geological mapping of these anomalies was carried out in the area surrounding Pegma Lake. This thesis is concerned with the general geology and petrology of the rocks in the claim group. A mineralographical study is made of the metallic minerals in mineralized rocks of the area.

The Addington-Preston area is bounded on the east and west by longitudes 74°45’ and 75°15’ and on the north and south by latitudes 46°15’ and 46°00’ North and it encompasses an area of approximately 430 square miles (Figure 1). It was mapped by the writer during the summers of 1955 and 1956 and the preliminary reports were published by the Quebec Department of Mines (Pollock, 1956, 1957). The area includes parts of Amherst, Addington, Preston and Papineau townships in Papineau county and parts of La Minerve, Clyde, Joly, Lesage, Rivard, Rocheblave, and all of Labelle and Gagnon townships in Labelle county.

Reverse magnetic polarization of rocks "in situ" is a phenomenon which has been observed and reported by several workers since its discovery by Brunhes (1906) in baked clays and adjacent basalts of Miocene age in Central France. Earlier, Folgheraiter (1899) had noticed the reverse polarization of fragments of ancient pottery discovered in Central Italy and he had concluded from this observation that the earth’s magnetic field was probably temporarily reversed from its present direction in this part of the world during Recent times.

The Woodstook and Millville areas are in the continuation of the New England Province of the Northern Appalachians. The oldest exposed rocks are sedimentary and are presumed to be Ordovician in age. Overlying these are Silurian sediments, which contain the iron and manganese deposits of the Woodstook area. The Ordovician and Silurian sediments indicate deposition in an unstable marine geosynclinal environment. Granite and allied rocks intruded the Silurian and older strata during the Devonian period.

The East Sullivan copper-zinc deposit is one of a group of simil.ar ore deposits situated along an east-west belt in the Noranda - Val d’Or district of Northwestern Quebec. The Horne Mine at Noranda, the Waite-Amulet deposits and the Normetal Mine are three other important producers of this group. The purpose of this study of the East Sullivan Mine is to present a description of the geology and ore deposits and to discuss the general problem of origin of the ores. There is no published work on this mine and but little study, outside that required for mine development, has been carried out.

In the systematic hydrothermal investigation or mineral systems in modern laboratories, the influence of several variables can be determined. In most recent studies the variables have been three: composition of the solid phase, temperature, pressure of water in contact with the solid phase. In general the investigators have varied each of these three properties of the systems and have determined the shifts in mineral equilibria caused by each change. In nature, mineral assemblages are undoubtedly controlled by other r variables in addition to these three. The present paper is concerned with an attempt to determine experimentally whether changes in other physical conditions are reflected by changes in the minerals present at a given temperature.

Abnormal concentrations of metals in peats have been frequently reported in the literature. One of the earliest reports is from Townsend (1845). He mentions a bog in western Ireland that contained sufficient copper to warrant mining; over 300 tons of copper were mined from the peat ash. The copper originated from small veins occurring in the surrounding rocks. Lovering (1927) reported on spongy masses of native copper in a peaty deposit near Cooke Montana. Forrester (1942) and Eckel (1949) have described copper bearing peats in Montana and Colorado.

The purpose of this study is to firstly, determine as accurately as optical methods permit the chemical composition of the various amphiboles in the Wabush Iron Formation. Secondly, determine the minerals associated with the amphiboles. Thirdly, give complete physical, optical, chemical and X-ray data for one of the grunerites and partial data for a manganiferous cummingtonite of the Wabush Iron Formation, to serve as a reference for other investigators who may be studying these amphiboles.

Pyrrhotite and sphalerite deposition temperatures were determined in the ores of New Calumet Mine, Quebec. Forty-five pyrrhotite and fifty-two sphalerite determinations were made taken from various samples. Out of these, both geothermometers were used in 18 specimens. In most cases both values were reasonably close. Only four specimens showed greater difference for the two geothermometers than 56°C, the mean difference being 17°C. The temperature values for pyrrhotite range from 350° to 484°C, of that of sphalerite from 370° to 538°C. Using these values, isotherms were drawn throughout the orebodies based on the sphalerite data. The pyrrhotite values did not show any apparent systematic variation. The sphalerite isotherms coincide with the down-dip trend of the principal ore zones. No significant change in deposition temperatures is shown with depth. The thermal gradients are steepest laterally. "Hot spots" in the major ore zones may indicate channel-ways through which mineralizing solutions travelled.

This thesis is based on a detailed investigation into the distribution, mode of formation and original source of the sand and gravel deposits located in the vicinity of the four Monteregian hills (St. Bruno, St. Hilaire, Rougemont, Johnson) lying immediately to the east and south east of Montreal. Prior to this investigation no detailed work on the mode of formation and possible source of the gravels and sands had been carried out, although McGerrigle (1936) had mapped the distribution of the deposits on a scale of 1"-4 miles. In the Montreal area, Byers (1933) carried out a similar investigation laying particular stress on the mode of formation of the deposits rather than on the possible source of the sands and gravels.