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New insights into the structure of the Sudbury igneous complex from downhole seismic studies

David Snyder, Gervais Perron, Karen Pflug and Kevin Stevens
New insights into the structure of the Sudbury igneous complex from downhole seismic studies
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (June 2002) 39 (6): 943-951

Abstract

New vertical seismic profiles from the northwest margin of the Sudbury impact structure provide details of structural geometries within the lower impact melt sheet (usually called the Sudbury Igneous Complex) and the sublayer norite layer. Vertical seismic profile sections and common depth point transformation images display several continuous reflections that correlate with faults and stratigraphic boundaries logged from drill cores. Of four possible mechanisms that explain repeated rock units, late-stage flow or normal faulting that occurred within the last layers to cool and crystallize might best explain the observations, especially the most prominent reflectors observed in the seismic data. These results reaffirm previously proposed two-stage cooling and deformation models for the impact melt sheet.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 39
Serial Issue: 6
Title: New insights into the structure of the Sudbury igneous complex from downhole seismic studies
Affiliation: Geological Survey of Canada, Ottawa, ON, Canada
Pages: 943-951
Published: 200206
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 16
Accession Number: 2002-067091
Categories: Structural geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Geol. Surv. Can., Contrib. No. 2001066
Illustration Description: sects., strat. cols., 1 table, geol. sketch maps
N46°25'00" - N46°49'60", W81°40'00" - W80°45'00"
Secondary Affiliation: Falconbridge Exploration, CAN, Canada
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200221
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