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TitreStratigraphy of the Seymour Inlet-Belize Inlet complex and Draney Inlet, British Columbia: results from piston cores 2007007PGCSTN007 and 2009003PGCSTN007, and freeze core 2007007PGCSTN006
TéléchargerTéléchargements
AuteurDallimore, A; Enkin, R J; Cooke, K A; Hay, M B
SourceCommission géologique du Canada, Dossier public 6747, 2019, 142 pages (1 feuille), https://doi.org/10.4095/313614 (Accès ouvert)
Année2019
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/313614
Mediaen ligne; numérique
Liensreadme
Formatspdf; rtf
ProvinceColombie-Britannique
SNRC92M/02; 92M/03; 92M/04; 92M/05; 92M/06
Lat/Long OENS-128.0000 -126.5000 51.5000 51.0000
Sujetssédiments marins; silts; sables; boues; échantillons carrotés; paléoenvironnement; analyses stratigraphiques; diagraphie géophysique; susceptibilité magnétique; interprétations géophysiques; interpretations sismiques; levés acoustiques marins; levés sismiques marins; levés de refraction sismiques; bathymétrie; structures sédimentaires; laminations; géologie marine; géologie des dépôts meubles/géomorphologie; stratigraphie; géophysique
Illustrationsphotographs; location maps; geoscientific sketch maps; seismic profiles; geophysical logs; tables; lithologic sections; profiles
ProgrammeGéoscience pour la sécurité publique - gestionnaire, Géoscience pour la sécurité publique
Diffusé2019 02 18
Résumé(Sommaire disponible en anglais seulement)
The Seymour Belize Inlet complex (Figure 1) and Draney Inlet, British Columbia, are coastal inlets in the mainland central coast of British Columbia. Both inlets host anoxic bottom waters which are often the environments where laminated sediments are preserved undisturbed. These laminated sediment columns are rare, unique and valuable recorders of environmental change, which can be dated on an annual scale, yielding high temporal resolution paleoenvironmental records. Many of B.C.'s inlets have been studied over the years (Dallimore and Jmieff, 2010, and Figure 2), but only a very few contain laminated sediments. These include Saanich Inlet (See Marine Geology Special Issue No. 174), Effingham Inlet (e.g., Hay et al., 2009; Dallimore et al., 2005; Chang et al. 2003) and Frederick Sound in the Seymour-Belize Inlet complex (Table 1). Quantitative techniques from that earlier work, based on the measurement of physical properties of the sediments, are now well developed for accurately interpreting high-resolution environmental history in these environments (e.g., Dallimore et al., 2008; Ivanochko et al. 2008a and b).
To extend paleo-environmental interpretations regionally, the central B.C. Seymour-Belize Inlet complex (Figure 3) has been investigated during a series of nine collaborative oceanographic research cruises (Table 2) mounted from the Institute of Ocean Sciences in Sidney, B.C.. This work has been variously funded over the years by Natural Resources Canada-Geological Survey of Canada-Pacific; Fisheries and Oceans Canada- Ocean Sciences and Productivity; the Canadian Hydrographic Service and Natural Sciences and Engineering Research Council of Canada, Discovery Grant and Ship Time grants programs.
This Open File presents a very detailed stratigraphy (Figure 4) and magnetic susceptibility physical property measurements from a freeze core and a 15 m piston core taken from Frederick Sound in the Seymour-Belize Inlet Complex in 2007, and for a 14.7 m piston core from Draney Inlet taken in 2009 (Figure 5). These detailed data, on a centimetre scale over the length of the cores, form the data archive for work on this core to be published in the literature post 2011.
Résumé(Résumé en langage clair et simple, non publié)
Sédiments du fond océanique échantillonnés dans les bassins de fjord le long de la côte Pacifique du Canada sont particulièrement utiles pour l¿enregistrement des variations climatiques et les âges des tremblements de terre au cours des 10000 dernières années. Ce dossier public fournit un collection des données brutes et une interprétation préliminaire des carottes de sédiments prélevés dans deux fjords de la côte centrale de la Colombie-Britannique.
GEOSCAN ID313614