About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

CSPG Special Publications


Canada's Continental Margins and Offshore Petroleum Exploration — Memoir 4, 1975
Pages 898-898
Abstracts: B. Offshore Symposium - Geological Association of Canada/Mineralogical Association of Canada

Unconformity-Bounded Sequences of the Central Scotian Shelf: Previous HitIndicatorsNext Hit of Differential Tectonism and Resultant Previous HitHydrocarbonNext Hit Migration: Abstract

Leigh Smith1


Stratigraphic analysis of the Sable Island C-67, Onondaga E-84, Oneida O-25 and Naskapi N-30 well sections shows that a succession of ten unconformity-bounded sequences are present, ranging in age from Pleistocene to? Early Jurassic.

Regional epeirogenic oscillations produced a cyclic alternation of depositional and erosional episodes with diapirism locally accentuating the differential erosional effects. The present sedimentary pile of the Scotian Shelf is a complex of the resultant differentially-preserved sequences.

Study of these differential erosional relationships gives a Previous HitdirectNext Hit measure of the amount of effective uplift that occurred during any particular erosional episode, whether locally or in terms of regional variations. This information can then be directly applied to delineate the spatial relationships through time of petroleum source, migration path and reservoir rocks in the region. Reliance on seismic exploration can thus be broadened by integration of regional geologic and geophysical analyses.

At least four lithically-distinct sequences occur in the offshore Tertiary. Analysis of these units is vital to the delineation of Previous HithydrocarbonTop migration patterns in the offshore region since the Cretaceous.


Acknowledgments and Associated Footnotes

1 Queen’s University, Kingston, Ontario

Copyright © 2009 by the Canadian Society of Petroleum Geologists