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PRELIMINARY OBSERVATIONS OF A PALEO-SEDIMENTARY SYSTEM USING 3-D SEISMIC, OFFSHORE NEWFOUNDLAND, EASTERN CANADA

By
M.A. WILLIAMSON
M.A. WILLIAMSON
Geological Survey of Canada (Atlantic) Box 1006 Dartmouth Nova Scotia, B2Y 4A2
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J. SHTMELD
J. SHTMELD
Geological Survey of Canada (Atlantic) Box 1006 Dartmouth Nova Scotia, B2Y 4A2
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K. DICKIE
K. DICKIE
Geological Survey of Canada (Atlantic) Box 1006 Dartmouth Nova Scotia, B2Y 4A2
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R.A. FENSOME
R.A. FENSOME
Geological Survey of Canada (Atlantic) Box 1006 Dartmouth Nova Scotia, B2Y 4A2
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V. PASCUCCI
V. PASCUCCI
Dipartimento di Scienze della Terra Universita di Siena 53100, Siena. Italy
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K. COFLIN
K. COFLIN
Geological Survey of Canada (Atlantic) Box 1006 Dartmouth Nova Scotia, B2Y 4A2
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D.B. PRIOR
D.B. PRIOR
Geological Survey of Canada (Atlantic) Box 100 Dartmouth Nova Scotia, B2Y 4A2 Current address: College of Geosciences Texas A&M University College Station, Texas 77843-3148, USA
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Published:
December 01, 1996

ABSTRACT

Petroleum industry 3-D seismic data over the Hibernia Oil field, offshore eastern Canada, allows high resolution imaging of a shelf indenting submarine canyon system of Paleocene age. This canyon provided a point source of sediments for a lowstand wedge and basin floor fans preserved elsewhere in the basin and together form a well preserved Lowstand Systems Tract. Now buried by up to 2 kilometres of sediment, the quality and resolution of coverage allows mapping, visualization, and interpretation of canyon morphology and the palco-shelf sedimentary environments.

Morphological differences along the course of the canyon provide clues to the geological mechanisms that initiated and modified the feature. These include changes in hydrodynamic regimes, slumping, headward erosion, and fluvial incision. Although not drilled, the nature of the Canyon’s fill is indicated by significant positive seismic relief over a portion of its length. This is attributed to differential compaction implying relatively coarse sediment fill. Comparison with recent outer shelf and upper slope canyon systems such as studied in the Gulf of Mexico’s Mississippi, Lavaca, and Yoakum canyons reveal several similarities.

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GCSSEPM

Stratigraphic Analysis Utilizing Advanced Geophysical, Wireline and Borehole Technology for Petroleum Exploration and Production

Jory A. Pacht
Jory A. Pacht
Seis-Strat Servies, Inc. Sugar Land, Texas
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Robert E. Sheriff
Robert E. Sheriff
University of Houston Houston, Texas
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Bob F. Perkins
Bob F. Perkins
GCSSEPM Foundation West Hartland, Connecticut
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SEPM Society for Sedimentary Geology
Volume
17
ISBN electronic:
978-0-9836097-6-6
Publication date:
December 01, 1996

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