Geophysical investigations in the Ungava Bay – Hudson Strait region of Northern Canada

1970 ◽  
Vol 7 (4) ◽  
pp. 1062-1076 ◽  
Author(s):  
A. C. Grant ◽  
K. S. Manchester

Continuous seismic profiler surveys have defined the limits of the Paleozoic outlier in Ungava Bay, and indicate that similar rocks occur to the north beneath Hudson Strait. These surveys have shown also that the strata underlying Hudson Strait are down-warped to form a synclinal structure with its axis parallel to the bathymetric trend of the Strait. Extrapolations based upon the dips and thicknesses indicated on the seismic profiler records and on physiographic evidence, suggest that the southwestern side of Hudson Strait has been down-faulted relative to the block of Paleozoic strata in Ungava Bay. These relationships postulated on the basis of seismic profiler results are supported by aeromagnetic, sea-magnetometer, and sea-gravimeter data from that region. A seismic and magnetic profile from Frobisher Bay indicates that a Paleozoic outlier occurs there as well. Although the submarine physiography of this region is primarily controlled by structure and secondarily modified by sub-aerial erosion, glacial erosion may account for local detail.

1980 ◽  
Vol 70 (4) ◽  
pp. 1199-1223
Author(s):  
Robert E. Wallace ◽  
Ta-Liang Teng

abstract On August 16, 22, and 23, 1976, a succession of three large earthquakes (M = 7.2, 6.8, 7.2) occurred in the Sungpan-Pingwu area of Szechuan Province, People's Republic of China. Their successful predictions resulted in a substantial reduction in the loss of lives. The epicenters of these events progressed from north to south along the Huya Fault, a NNW-striking fault between the NE-trending Lungmenshan fracture zone and the north-trending Mienchiang fracture zone in western Szechuan. The greatest intensity reported was IX; isoseismals were crudely elliptical with the long axis parallel to the trend of the Huya Fault. The predictions were made with a reasonably good magnitude window (less than 0.5 magnitude unit), a rather large space window (about 150 km ×150 km), and a remarkably good time window (within a day). The detailed prediction process began with field monitoring some 6 yr before the Sungpan-Pingwu events and ended with the final issuance of warning and mass evacuation. During the few weeks preceding the earthquakes, about 1,300 observations of noninstrumental anomalies and precursory phenomena were reported by scientists and lay brigades: outgassings, fireballs and other earthquake lights, abnormal animal and plant behavior, and telluric currents.


Author(s):  
Lea Tufford

Canada has a wide expanse of geographic terrain that encompasses urban, sub-urban, rural, and remote areas. The purpose of this chapter is to explore the unique challenges of mandatory reporters living and working in northern parts of provincial and territorial Canada. The chapter opens with a discussion of how the north has been defined historically and by Indigenous and settler perspectives. The chapter proceeds to examine the economic and social context of northern Canada before moving into a review of the challenges facing mandatory reporters. The chapter offers suggestions to mandatory reporters to balance their statutory responsibilities with the contextual reality of living in the community.


Polar Record ◽  
1971 ◽  
Vol 15 (99) ◽  
pp. 893-920
Author(s):  
Alan Cooke ◽  
Clive Holland

During the period covered by this instalment of our list, the accomplishments of the North West Company, both in geographical exploration and in the realization of profits were great. It consolidated its position in the fur-rich Athabasca district and, with a few posts along Mackenzie River, began to draw in the furs of that immense territory. Its traders invaded not only the western part of Rupert's Land but even Hudson Bay itself. The Hudson's Bay Company rose only slowly to the challenge of its formidable rival, but, gradually, it began to adopt new policies and new techniques and to meet the North West Company on its own grounds and on its own terms. Finally, after a bitter struggle that was almost the destruction of both companies, the Hudson's Bay Company, in 1821, effectively absorbed the North West Company in a coalition that gave the older company greater strength than ever and a wider monopoly than Prince Rupert had thought of.


2009 ◽  
Vol 17 (4) ◽  
pp. 206-208
Author(s):  
Brian Loosmore

Born and raised in the Orkney Islands, Dr John Rae joined the Hudson's Bay Company and rose to be Chief Factor. Unusually tough and intelligent, he explored much of northern Canada, mapping the north eastern shore and finding controversial evidence of the lost Franklin expedition of 1845. A talented botanist, geologist, anthropologist and cartographer, he was northern Canada's most distinguished explorer.


ARCTIC ◽  
1965 ◽  
Vol 18 (2) ◽  
pp. 146
Author(s):  
A.R. Byers

James Buckland Mawdsley, M.B.E., Ph.D., F.R.S.C., a Charter Associate of the Arctic Institute of North America, died very suddenly on 3 December 1964 at the age of 70. As Director of the Institute for Northern Studies, University of Saskatchewan, he played a major role in its organization and development and exerted a very great influence on research in northern Canada. He was born on 22 July 1894 near Siena, Italy, the son of British-American parents. In 1904 the Mawdsley family left Italy and settled in the village of Gainsborough, southeastern Saskatchewan. After receiving his public and high school training in Saskatchewan he entered McGill University in 1913. His career, like that of many of his contemporaries, was interrupted by the First World War. Twice wounded in France, first with the Princess Patricia Canadian Light Infantry and then as a pilot with the Royal Flying Corps, he was awarded the M.B.E. at the end of the war. In 1919 he returned to McGill and two years later graduated in Mining Engineering. He then went to Princeton University where he obtained his Doctor of Philosophy degree in Geology in 1924. That same year he joined the Geological Survey of Canada and for the next five years applied his scientific knowledge to the problems of the regional geology of northwestern Quebec. A new chapter in his life began in 1929 when he accepted the appointment of professor and head of the Department of Geology at the University of Saskatchewan, a position he held until he became Dean of Engineering in 1961 and also the Director of the Institute for Northern Studies. In 1963 he retired as Dean and was then able to devote all his time to the affairs of the Institute. In addition to his academic duties his professional activities included field work in northern Saskatchewan for the Geological Survey of Canada and the Saskatchewan Department of Mineral Resources, and private consulting assignments took him to other parts of northern Canada, to the United States and Great Britain. He was the author of 51 scientific papers and his honours were many. He was elected a Fellow of the Royal Society of Canada in 1933 and was chairman of Section IV for the year 1954-55. He was president of the Geological Association of Canada during 1955-56 and of the Canadian Institute of Mining and Metallurgy for 1961-62. In 1953 he was awarded the Institute's Barlow Memorial Medal in recognition of his paper entitled "Uraninite-bearing deposits, Charlebois Lake area, northeastern Saskatchewan". He was a Fellow and Director of the Royal Canadian Geographical Society, a Fellow of the Geological Society of America, a member of the Society of Economic Geologists, the Engineering Institute of Canada, and the Association of Professional Engineers of Saskatchewan. He had an eventful life, travelled widely, met and was a friend to many people. Such qualities as tact, kindliness, sincerity and respect for the thoughts of others enabled him to present his views without arousing undue antagonism, and to cooperate with others in reaching decisions. Recognized as an able administrator, scientist, and teacher, perhaps his greatest service will prove to be the influence he had on those who worked or studied under him. In them he not only instilled a feeling of scientific curiosity but also a keen interest and love of the North.


Polar Record ◽  
1947 ◽  
Vol 5 (33-34) ◽  
pp. 14-26 ◽  
Author(s):  
J. T. Wilson

Exercise Musk-ox was no isolated adventure, but the culminating test of several years of wartime work. In it, vehicles, equipment, and techniques of training and of air-supply, secretly developed during the war, were given an open test to ascertain their usefulness in northern Canada. Because the public had not been aware of this secret work by the services, Exercise Musk-ox was hailed by them as a new idea, but it would not have been possible had not the equipment and methods all been ready and proven before tbe close of the war.So great had been these wartime improvements that none of those men best acquainted with the north country and with older methods of transportation believed that the ground party had any chance of driving 2600 miles without roads across the Arctic and sub-Arctic in less than 2½ months. Neither was it generally realised that the military purposes had already been served and that this was no tactical exercise but a demonstration of the soundness of military development and an experiment in applying it to peaceful pursuits in the Canadian Arctic.


Polar Record ◽  
1965 ◽  
Vol 12 (81) ◽  
pp. 683-702
Author(s):  
Amil Dubnie ◽  
W. Keith Buck

For the purpose of this paper, northern Canada comprises all the territory north of lat 60° N. Included in this area of approximately 1500000 square miles are all of Yukon and Northwest Territories and small parts of Quebec and Labrador. Although the area is clearly defined by latitude, the subject matter of this paper also takes into account those developments farther south which have a direct effect upon the north.


Sign in / Sign up

Export Citation Format

Share Document