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TitreChemical fingerprinting of detrital minerals in the Upper Jurassic - Lower Cretaceous sandstones, Scotian Basin
TéléchargerTéléchargements
AuteurPe-Piper, G; Tsikouras, B; Piper, D J W; Triantaphyllidis, S
SourceCommission géologique du Canada, Dossier public 6288, 2009, 150 pages, https://doi.org/10.4095/248226 (Accès ouvert)
Image
Année2009
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/248226
Mediaen ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'est
Lat/Long OENS-64.0000 -53.0000 46.0000 43.0000
Sujetsminéraux détritiques; débris; grès; lithologie; analyses chimiques; analyse chimique; tourmaline; grenat; spinelle; chromite; feldspath; muscovite; biotite; phlogopite; amphibolites; pyroxene monoclinique; chlorite; apatite; épidote; faciès diagénétiques; diagenèse; Crétacé inférieur; Jurassique supérieur; pétrographie; puits; pétrologie du sediment; interprétations géochimiques; géochimie des roches totales; carottes; minéralogie; géochimie; sédimentologie; géologie marine; Mésozoïque; Crétacé; Jurassique
Illustrationslocation maps; tables; ternary diagrams; plots
ProgrammeAnalyse de bassin et ressources géoscientifiques, Géoscience en mer
Diffusé2009 12 07
Résumé(disponible en anglais seulement)
Understanding the provenance of sandstones in the Scotian basin using detrital petrology is a petroleum exploration tool because of the importance of Upper Jurassic - Lower Cretaceous sandstone reservoirs. Furthermore, detrital petrology is an important influence on diagenesis and thus reservoir quality. The chemistry of 25 types of detrital minerals (excluding quartz) has been determined by electron microprobe using samples from the Upper Jurassic - Lower Cretaceous interval in 26 wells across the full extent of the Scotian basin. Variations in mineral chemistry that can be related to provenance have been analysed for tourmaline, garnet, spinel/chromite, feldspar, muscovite, biotite, amphibole, clinopyroxene, chlorite, epidote and apatite. These mineral chemical compositions are compared with analyses from rocks in the Appalachians and Grenville province and where necessary the wider literature. Identification of sources for most of the minerals is tentative, due to insufficient analytical data from potential sources on land. Differences in mineral assemblages are found between the following groups of wells: La Have platform, extreme western Sable sub-basin, main Sable sub-basin, western Abenaki sub-basin, eastern Abenaki sub-basin and SW Grand Banks. Stratigraphic variation is less prominent than geographic variation and is partly masked by diagenetic loss of minerals at burial depths > 2.7 km.
GEOSCAN ID248226