| Titre | Possible tectonic influence on Upper Ordovician stratigraphy and source rock distribution in the southern Hudson Platform, northern Ontario |
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| Auteur | Armstrong, D |
| Source | 2014 AAPG Eastern Section Meeting; 90195, 2014 p. 1  Accès
ouvert |
| Liens | Online - En ligne
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| Année | 2014 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20190416 |
| Éditeur | American Association of Petroleum Geologists |
| Réunion | AAPG 43rd Eastern Section Meeting; London, ON; CA; Septembre 27-30, 2014 |
| Document | site Web |
| Lang. | anglais |
| Media | en ligne; numérique |
| Formats | html |
| Province | Ontario |
| Région | Baie d'Hudson |
| Sujets | Bassin d'Hudson Bay ; combustibles fossiles; géophysique; stratigraphie; paléontologie; Sciences et technologie; Nature et environnement |
| Programme | GEM2 : La géocartographie de l'énergie et des minéraux Roches mères des hydrocarbures de la région d'Hudson/Ungava |
| Diffusé | 2014 09 01 |
| Résumé | (disponible en anglais seulement)
The Ontario Geological Survey (OGS) has been working on the Hudson Platform Project with the geological surveys of Canada and Manitoba. The project involved
reassessment of existing data (e.g. offshore and onshore wells, seismic surveys) and acquisition of new data (e.g. biostratigraphy, apatite fission track, Rock EvalTM6). Results indicate that the Hudson Bay Basin (HBB) has oil potential. The Platform
in northern Ontario includes the southern margin of the HBB, Cape Henrietta Maria Arch (CHMA), and Moose River Basin (MRB). The present day basin configuration probably developed in the Devonian. The Paleozoic succession consists of Upper Ordovician
(Edenian) to Upper Devonian (Famennian) shallow marine carbonates, evaporites and shales. The Aquitaine Sogepet et al. Pen No. 1 well is an important reference section in the southern HBB. Recent mineral exploration drilling in the northern MRB
provides abundant new data. Correlation of Ordovician and Silurian stratigraphy from Pen No. 1 well into the MRB has been assisted by new bio- and chemo-stratigraphic data. The Upper Ordovician transgression extended into the northern MRB and is
represented by Maysvillian bioturbated subtidal carbonates overly thin basal siliciclastics. Near the CMHA these are overlain by organic-rich lime mudstones of the Maysvillian to Richmondian Boas River Formation that represent either maximum
transgression or the onset of regression. The latter is suggested by: 1) sparse restricted faunal assemblage; 2) the overlying restricted evaporite-bearing dolomudstone unit (Surprise Creek Fm); and 3) roughly equivalent strata in the MRB, consisting
of restricted marine dolomudstones with thin organic-rich seams (up to 15% TOC). Data are very sparse in the southern HBB, so this organic facies may be more widespread than current data indicate. Overlying the regressive Surprise Creek Formation in
the HBB are subtidal bio-wackestones of the Caution Creek and Chasm Creek formations. These units are mostly absent in the MRB, either not deposited or cut by an overlying unconformity. The overlying Red Head Rapids (RHR) Formation is characterized
by evaporite cycles in the HBB and poorly developed cycles which include terrestrial(?) red beds in the MRB. New stratigraphic evidence suggests that part of the Red Head Rapids is Hirnantian. Missing sub-RHR strata in the MRB suggests either
differential subsidence across the CMHA or differential uplift of the MRB area prior to RHR time. |
| GEOSCAN ID | 321691 |
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