GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreEarly Triassic peritidal carbonate sedimentation on a Panthalassan seamount: The Jesmond succession, Cache Creek Terrane, British Columbia, Canada
AuteurSano, H; Onoue, T; Orchard, M J; Martini, R
SourceFacies vol. 58, 2012 p. 113-130, https://doi.org/10.1007/s10347-011-0270-4 (Accès ouvert)
Année2012
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100491
ÉditeurSpringer Nature
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1007/s10347-011-0270-4
Mediapapier; en ligne; numérique
Formatspdf
ProvinceColombie-Britannique
SNRC92I/13; 92I/14; 92P/03; 92P/04; 92P/05; 92P/06
Lat/Long OENS-122.0000 -121.0000 51.5000 50.7500
SujetsTrias inférieur; roches sédimentaires; calcaires; dolomies; sedimentation; carbonates; monts sous-marins; biostratigraphie; calcaires à debris jointifs; fossiles; morphologie des fossiles; descriptions des fossiles; faciès; descriptions de faciès; Terrane de Cache Creek ; Foraminfère; sédimentologie; stratigraphie; Mésozoïque; Trias
Illustrationslocation maps; photomicrographs; stratigraphic columns; tables
ProgrammeGisements polymétalliques - nord-ouest de la Cordillère canadienne (Yukon et Colombie-Britannique), GEM : La géocartographie de l'énergie et des minéraux
Diffusé2011 04 11
Résumé(disponible en anglais seulement)
The Jesmond succession of the Cache Creek Terrane in southern British Columbia records late Early Triassic peritidal carbonate sedimentation on a mudflat of a buildup resting upon a Panthalassan seamount. Conodont and foraminiferal biostratigraphy dates the succession as the uppermost Smithian to mid-Spathian. The study section (ca. 91 m thick) is dominated by fine-grained carbonates and organized into at least 12 shallowing-upwards cycles, each consisting of shallow subtidal facies and overlying intertidal facies. The former includes peloidal and skeletal limestones, flat-pebble conglomerates, stromatolitic bindstones, and oolitic grainstone, whereas the latter consists mainly of dolomicrite. The scarcity of skeletal debris, prevalence of microbialite, and intermittent intercalation of flat-pebble conglomerate facies imply environmentally harsh conditions in the mudflat. The study section also records a rapid sea-level fall near the Smithian-Spathian boundary followed by a gradual sea-level rise in the early to mid-Spathian.
GEOSCAN ID288097