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Appalachians of Southern Quebec Seen Through Seismic Line No. 2001

P.J. Laroche
P.J. Laroche
SOQUIP, Quebec
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January 01, 1983


In the fall of 1978, the Societe Quebecoise d'Initiatives Petrolieres (SOQUIP), using a Geosource vibrator crew, recorded for the Government of Quebec a 150 km (93 mi) long seismic line across the St. Lawrence Lowlands in order to promote interest in the area.

This seismic line was shot from a point on the St. Lawrence River 50 km (31 mi) southwest of Quebec City southeastward to the USA border.

The profile crosses Cambro-Ordovician rocks of the Taconian orogen subdivided in three northeast-to-southwest-trending lithostructural domains: the autochthonous domain of the foreland thrust belt, the allochthonous domain of the Humber zone and the Dunnage zone, and overlying rocks of the Connecticut Valley-Gaspe synclinorium. For more geological information about the general tectonic and stratigraphic context of the area, the reader is referred to a list of selected papers.

The geophysical interpretation of this relatively fair-to-poor quality seismic data (Figure 1) is based on correlations from many deep wells, other seismic lines, and surface geology. Thrusted sheets can be recognized on the seismic profile and numerous fault planes can be interpreted of which a few are marked on Figure 2.

Depth conversions (Figure 3) were done by extracting average velocity information from available sonic logs and applying it to the different rock units or their lateral equivalent throughout the seismic profile.

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AAPG Studies in Geology

Seismic Expression of Structural Styles: A Picture and Work Atlas. Volume 1–The Layered Earth, Volume 2–Tectonics Of Extensional Provinces, & Volume 3–Tectonics Of Compressional Provinces

A. W. Bally
A. W. Bally
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American Association of Petroleum Geologists
ISBN electronic:
Publication date:
January 01, 1983




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