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TitreCascadia margin, northeast Pacific Ocean: hydrate distribution from geophysical investigations
AuteurSpence, G D; Hyndman, R D; Chapman, N R; Riedel, M; Edwards, N; Yuan, J
SourceNatural gas hydrate in oceanic and permafrost environments; par Max, M D (éd.); Coastal Systems and Continental Margins vol. 5, 2000 p. 183-198, https://doi.org/10.1007/978-94-011-4387-5 15
Année2000
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 2000007
ÉditeurSpringer Netherlands
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1007/978-94-011-4387-5 15
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière
Sujetsgaz; hydrate; méthane hydraté; gîtes d'hydrate; sismicité; interpretations sismiques; levés sismiques; levés de reflexion sismiques; données sismiques; flux thermique; marges continentales; méthane; forage en mer profonde; forage à grande profondeur; combustibles fossiles; géochimie; géophysique; tectonique
Illustrationslocation maps; seismic reflection profiles; graphs
ProgrammeOcean Drilling Program
Résumé(disponible en anglais seulement)
Natural gas hydrate was first recognized on the Cascadia margin in 1985 through the characteristic bottom-simulating reflector (BSR) on conventional multichannel seismic data (Davis and Hyndman, 1989, Davis et al., 1990). Since then, the Cascadia accretionary margin has received the most intensive studies of any convergent margin for determination of the in-situ properties of marine gas hydrate. Key control for understanding the properties and formation processes of hydrate has been derived from drill holes of the Ocean Drilling Program (ODP) Leg 146, carried out in 1992. Estimates of hydrate concentration were provided through analysis of downhole seismic and resistivity logs and through measurement of chlorinity in pore fluids from recovered sediment core samples.
GEOSCAN ID215435