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The AAPG/Datapages Combined Publications Database

CSPG Special Publications


Canada's Continental Margins and Offshore Petroleum Exploration — Memoir 4, 1975
Pages 895-895
Abstracts: B. Offshore Symposium - Geological Association of Canada/Mineralogical Association of Canada

Broad Structure of the Central and Northern Nova Scotian Continental Shelf: Abstract

A. K. Goodacre1


As is well known, the Orpheus gravity feature outlines the seaward extension of a major fault zone that cuts east-west across Nova Scotia from the Minas Basin to Chedabucto Bay. This fault zone is also reflected in the earth’s Previous HitmagneticNext Hit field and recently available Previous HitmagneticNext Hit data indicate that there is generally Previous HitmagneticNext Hit material to the north of this zone and non-Previous HitmagneticNext Hit material to the south. Model studies of Previous HitmagneticNext Hit profiles over the east end of the Orpheus feature indicate that the Previous HitmagneticNext Hit basement is deeply buried and that the discontinuity is nearly vertical. Profiles over the Cobequid Highlands indicate that the contact dips to the south and that the minimum mean value of magnetization is about .001 emu. Samples of diorite and gabbro from the Cobequid Highlands exhibit this magnetization. Combined analysis of gravity and Previous HitmagneticNext Hit anomalies over the northern Scotian Shelf show that gravity lows often tend to correlate with Previous HitmagneticNext Hit highs and that significant remnant magnetization is often present in the basement rocks. Gravity and Previous HitmagneticTop trends suggest a continuity of regional basement structure between southeastern Newfoundland and eastern Cape Breton Island.


Acknowledgments and Associated Footnotes

1 Earth Physics Branch, Department of Energy, Mines and Resources, Ottawa, Ontario

Copyright © 2009 by the Canadian Society of Petroleum Geologists