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TitreA statistical analysis of the spatial association of seismicity with drainage patterns and magnetic anomalies in western Quebec
AuteurGoodacre, A K; Bonham-Carter, G F; Agterberg, F P; Wright, D F
SourceTectonophysics vol. 217, no. 3/4, 1993 p. 285-305, https://doi.org/10.1016/0040-1951(93)90011-8
Année1993
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 19291
ÉditeurElsevier BV
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/0040-1951(93)90011-8
Mediapapier; en ligne; numérique
Formatspdf
ProvinceQuébec; Ontario
SNRC31G/05; 31G/06; 31G/07; 31G/08; 31G/09; 31G/10; 31G/11; 31G/12; 31G/13; 31G/14; 31G/15; 31G/16; 31J
Lat/Long OENS -76.0000 -74.0000 47.0000 45.2500
Sujetsméthodes analytiques; méthodes statistiques; analyse statistique; configurations hydrographiques; anomalies magnétiques; sismicité; détermination des contraintes; orientation des contraintes; réseau de contraintes; tendances structurelles; failles; linéations; caractéristiques structurales; epicentres; secousses séismiques; paragneiss; roches métamorphiques; Aphébien; magnétisme du champ complet; anomalies gravimétriques; levés géophysiques; établissement de modèles; Hélikien; géologie structurale; géophysique; géomathématique; Protérozoïque
Illustrationssketch maps; probability diagrams; formulae
Résumé(disponible en anglais seulement)
The "weights of evidence" statistical method, previously applied to the problem of relating mineral occurrences to geological and geomorphological features, has been applied to the question of whether in a particular area there may be a spatial correlation between seismic epicenters and various geological and geophysical parameters. We find that seismicity in western Quebec is associated with NNE-trending drainage features and positive aeromagnetic anomalies. Our interpretation is that NNE-trending zones of weakness are being re-activated in the presence of a NE-SW regional compressive stress field and that less competent zones in the upper crust, as delineated by positive aeromagnetic anomalies, are causing stress and, hence, seismicity to be concentrated in the subjacent middle crust.
GEOSCAN ID133511