| Titre | Thermal maturity and hydrocarbon potential of the sedimentary succession from the Hecla field in Sverdrup Basin, Arctic Canada |
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| Auteur | Gentzis, T; Goodarzi, F |
| Source | Recent advances in organic petrology and geochemistry, a symposium honoring Dr. P. Hacquebard: proceedings; par Kalkreuth, W D (éd.); Bustin, R M (éd.); Cameron, A R (éd.); International Journal of Coal
Geology vol. 19, issue 1-4, 1991 p. 483-517, https://doi.org/10.1016/0166-5162(91)90031-d |
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| Année | 1991 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 50090 |
| Séries alt. | Alberta Research Council Contribution Series 2044 |
| Éditeur | Elsevier BV |
| Réunion | Recent advances in organic petrology and geochemistry, a symposium honoring Dr. P. Hacquebard, Joint Meeting of the Society for Organic Petrology and the Canadian Coal Petrographers Group; Calgary,
Alberta; CA; Septembre 9-14, 1990 |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/0166-5162(91)90031-d |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Nunavut; Territoires du Nord-Ouest |
| SNRC | 99; 89; 79; 69; 59; 49; 39; 120; 340; 560 |
| Région | Axel Heiberg Island; île d'Ellesmere; Melville Island; Prince Patrick Island |
| Lat/Long OENS | -124.0000 -60.0000 84.0000 75.0000 |
| Sujets | roches mères; antecedents thermiques; pyrolyse; dépôts organiques; carbone organique; pétrologie de la houille; Bassin de Sverdrup ; Groupe de Schei Point ; Formation de Deer Bay ; Formation de Jameson
Bay ; Formation de Murray Harbour ; géologie générale; combustibles fossiles; Jurassique; Crétacé |
| Illustrations | cartes de localisation; diagrammes stratigraphiques; graphiques; diagrammes schématiques |
| Diffusé | 1991 12 01 |
| Résumé | (disponible en anglais seulement)
The thermal maturity and source-rock potential of the Upper Palaeozoic and Mesozoic sediments in the Hecla field, Melville Island, Arctic Canada, have been
studied using reflected-light microscopy and Rock-Eval pyrolysis. Approximately 250 polished whole-rock samples were examined and their retlectance (% Ro, random) measured. In addition, approximately 100 samples were subjected to Rock-Eval/TOC
analyses. Hydrogen-rich organic matter in the Schei Point Group sediments is dominated by alginite ( Tasmanales), dinoflagellate cysts with minor amounts of sporinite, cutinite, resinite and liptodetrinite in an amorphous fluorescing matrix.
Vitrinite reflectance in Cretaceous sediments ranges from 0.41 to 0.54%; in Jurassic sediments it ranges from 0.43 to 0.64% and in Triassic sediments from 0.50 to 0.65%. The Triassic Schei Point Group calcareous shales and marlstones contain organic
matter mainly
of marine origin, whereas the predominantly terrestrially-derived organic matter present in the Jameson Bay ( Lower Jurassic ) and in the Upper Jurassic to Lower Cretaceous Deer Bay formations have lower TOC. Only the Ringnes
Formation has a TOC content of equivalent to or greater than Schei Point source rocks. Within the Schei Point Group, the Cape Richards and Eden Bay members of the Hoyle Bay Formation are slightly richer in TOC than the Murray Harbour Formation (Cape
Caledonia Member). Higher average TOC contents ( > 3.0%) have been reported in the Cape Richards and Eden Bay members in almost all Hecla drillholes. Variations in the level of thermal maturity of Mesozoic sediments in the Hecla field are a function
of burial depth. The stratigraphic succession thickens towards the main Sverdrup Basin depocentre located in a N-NE direction. The pattern of the isoreflectance contours at the top of the Triassic (Barrow Formation) is similar to that of formation
boundary lines of the same formations, an indication that present-day maturation levels are largely controlled by basin subsidence. |
| GEOSCAN ID | 203867 |
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