Capítulo de Libro
Stratigraphic and Depositional Architecture of a Slope Channel System: Isaac Channel 5, Castle Creek South, Isaac Formation, Windermere Supergroup, British Columbia, Canada
Título del libro: Atlas of Deep-Water Outcrops
Fecha de publicación:
2007
Editorial:
American Association of Petroleum Geology
ISBN:
978-0-89181-063-6
Idioma:
Inglés
Clasificación temática:
Resumen
A detailed architectural analysis was conducted on Isaac Channel 5 in the Castle Creek area (east-central British Columbia, Canada, Figure 1). Isaac Channel 5 developed within a Neoproterozoic slope turbidite system along the passive western margin of North America where debris flows and mass movements were common (see Arnott and Ross, Chapter 22, this volume). Isaac Channel 5 crops out across a 3.5-km (2.1-mi)-long section oriented oblique to mean paleoflow (toward the northwest) and represents an enduring transport and depositional pathway that accumulated ~100 m (~330 ft) of mostly sand sediment (Figures 2, 3). It consists of three stacked, high net-to-gross channel-complex fills (each 8–30 m [25–100 ft] thick) that correspond to shorter term flow conduits (C1, C2, and C3; Figures 2, 3). Channel complexes are multistory units that consist mainly of thick-bedded, Bouma Ta and Tab divisions, mudstone-clast breccia, and medium-bedded, dune cross-stratified sandstone. Granule conglomerate to medium-grained sandstone is the most common grain-size range. Five different channel-fill elements were identified within the channel complexes. Each consists of a different assemblage of facies, stratal patterns, and/or lateral dimensions, and unique reservoir characteristics (Figure 12). The development of channel-fill elements is linked to specific combinations of flow and sediment flux conditions that controlled aggradation and erosion within channels. Channel complexes are capped by siltstone-rich, thin-bedded units (T3 and T4; Figures 2, 3) that represent intervening episodes of overbank and levee sedimentation (local channel-complex deactivation). Additionally, debrite deposits (D1 and D2), which occur typically at the base of channels and channel complexes, are the result of cohesive sediment-gravity flows during channel/channelcomplex initiation. These siltstone- and mudstone-rich units, which separate channel complexes and extend across the full outcrop (>3 km [>2 mi] long), represent the most important potential impediments to intrastratal fluid flow. Strata of Isaac Channel 5 document the stratigraphic complexity, in terms of evolution and reservoir characterization, that can be expected in slope turbidite channel systems, developed in passive margins. Further, it is a potential analog for similar systems developed in continental margin basins that are mostly known from subsurface data (e.g., offshore Brazil, Egypt, Gulf of Mexico, and West Africa).
Items relacionados
Mostrando titulos relacionados por título, autor y tema.
-
Capítulo de Libro Outcrop characterization of a passive-margin, channel-complex set: Isaac Channel 5, Neoproterozoic Isaac Formation, British Columbia, CanadaTítulo del libro: Atlas of Deep-Water OutcropsSchwarz, Ernesto ; Arnot, R. W. C. - Otros responsables: Nilsen, Tor Helge - (American Association of Petroleum Geology, 2007)
Archivos asociados
Licencia
Identificadores
Colecciones
Capítulos de libros(CIG)
Capítulos de libros de CENTRO DE INVEST.GEOLOGICAS (I)
Capítulos de libros de CENTRO DE INVEST.GEOLOGICAS (I)
Citación
Schwarz, Ernesto; Arnott, R. W. C.; Stratigraphic and Depositional Architecture of a Slope Channel System: Isaac Channel 5, Castle Creek South, Isaac Formation, Windermere Supergroup, British Columbia, Canada; American Association of Petroleum Geology; 2007; 97-101
Compartir