| Titre | Geomorphologic and sedimentary evolution of a transgressive thermokarst coast, Mackenzie Delta region, Canadian Beaufort Sea |
| Auteur | Hill, P R; Solomon, S |
| Source | Journal of Coastal Research vol. 15, no. 4, 1999 p. 1011-1029 |
| Liens | Online - En ligne
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| Liens | Online - En ligne
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| Année | 1999 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 1998175 |
| Document | publication en série |
| Lang. | anglais |
| Media | papier |
| SNRC | 107C/11; 107C/14 |
| Lat/Long OENS | -135.0000 -134.0000 70.0000 69.5000 |
| Sujets | géologie de l'arctique; milieux sédimentaires; pergélisol; trangressions; thermokarst; exploration pétrolière; milieu côtièr; Holocène; géologie marine; sédimentologie; combustibles fossiles; géologie des
dépôts meubles/géomorphologie |
| Illustrations | location maps; models; schematic models; photographs; graphs; cross-sections, stratigraphic; seismic profiles; stratigraphic columns |
| Programme | Northern Oil And Gas Action Program (NOGAP) |
| Programme | CRSNG Conseil de recherches en sciences
naturelles et en génie du Canada |
| Résumé | (disponible en anglais seulement)
Transgression of a thermokarst coastline results in the development of a distinctive coastal morphology consisting of breached thermokarst lakes, separated by
narrow headlands fringed by barrier-spit complexes and sandflats. A detailed description of the geomorphology and sediment facies of one such area east of North Head in the Canadian Beaufort Sea is combined with seismic and core analysis from the
adjacent inner shelf to develop a sedimentologic model for use in interpolating geotechnical conditions in the region. The model proposes the sedimentary successions that develop during transgression in a number of sub-environments related to the
thermokarst morphology. It differs from conventional shoreface evolution models in that thermokarst processes create additional accommodation space at the coastline. This extra space, formerly occupied by ground ice, is rapidly filled by coastal and
shelf lithosomes, the latter consisting principally of mud from the nearby Mackenzie River. |
| GEOSCAN ID | 209856 |
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