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.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.820662&sl=0
| Department/Agency | Canada. Natural Resources Canada. Geological Survey of Canada. |
|---|---|
| Title | Evidence for a deep gas-hydrate stability zone associated with submerged permafrost on the Canadian Arctic Beaufort Shelf, Northwest Territories / M. Riedel … [et al.]. |
| Series title | Current research, 1701-4387 ; 2015-8 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Includes bibliographical references. |
| Publishing information | [Ottawa] : Natural Resources Canada, 2015. |
| Author / Contributor | Riedel, Michael. |
| Description | 17 p. : col. charts, col. ill., col. maps. |
| ISBN | 978-0-660-03233-7 |
| Catalogue number |
|
| Departmental catalogue number | 296987 |
| Subject terms | Ocean floor Permafrost Natural gas Geophysics Seismology |
Request alternate formats
To request an alternate format of a publication, complete the Government of Canada Publications email form. Use the form’s “question or comment” field to specify the requested publication.- Date modified: