Evidence for a deep gas-hydrate stability zone associated with submerged permafrost on the Canadian Arctic Beaufort Shelf, Northwest Territories / M. Riedel … [et al.]. : M44-2015/8E-PDF
"The presence of offshore permafrost on the Canadian Beaufort Sea Shelf has long been recognized from seismic and borehole data. These thermal conditions could support a gas hydrate stability zone beneath the subsea permafrost. In this study we present the first evidence for the widespread occurrence of gas hydrate on the Beaufort Shelf using 3-D seismic data. A reflector was identified at a depth of ~1000 m that mimics some of the behaviour of the traditional bottom-simulating reflectors (BSRs) in marine gas hydrate regimes. However, the reflection is not truly bottom-simulating, as its depth is controlled by the thinning wedge of subsea permafrost. The reflection cross-cuts strata and marks a zone of enhanced reflectivity, possibly originating from free gas accumulated at this phase boundary. Implications of this widespread gas hydrate zone include: deep-drilling hazards associated with the free gas, potential overpressure, lateral fluid migration and associated seafloor expulsions"--Provided by publisher.
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| Ministère/Organisme | Canada. Natural Resources Canada. Geological Survey of Canada. |
|---|---|
| Titre | Evidence for a deep gas-hydrate stability zone associated with submerged permafrost on the Canadian Arctic Beaufort Shelf, Northwest Territories / M. Riedel … [et al.]. |
| Titre de la série | Current research, 1701-4387 ; 2015-8 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographical references. |
| Information sur la publication | [Ottawa] : Natural Resources Canada, 2015. |
| Auteur / Contributeur | Riedel, Michael. |
| Description | 17 p. : col. charts, col. ill., col. maps. |
| ISBN | 978-0-660-03233-7 |
| Numéro de catalogue |
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| Numéro de catalogue du ministère | 296987 |
| Descripteurs | Ocean floor Permafrost Natural gas Geophysics Seismology |
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