Sedimentology and stratigraphy of the reindeer formation (early tertiary) in the subsurface, MacKenzie Delta - Beaufort Sea area, Northwest Territories, by Franz W. Nentwich.

A method is described of matching environmentally significant areas (ESAs) with the most appropriate form of management for each, selected from all the available forms. This involves comparing the purpose, reasons for significance, existing uses, and tenure, of each ESA, with the characteristics of agencies, protected area categories, legislation, and non-statutory arrangements for management, as well as examining agency coordination mechanisms or other means of implementation. The method was formulated for ESAs in the Northwest Territories (NWT) of Canada, but is considered to have wide applicability. It is illustrated with a test application to seven proposed ESAs in what is termed the eastern Beaufort Sea region.

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Albedo of Melting Sea Ice in the Southern Beaufort Sea

Journal of Glaciology ◽

10.3189/s0022143000013022 ◽

1971 ◽

Vol 10 (58) ◽

pp. 101-104 ◽

Cited By ~ 1

Author(s):

M.P. Langleben

Keyword(s):

Sea Ice ◽

Northwest Territories ◽

Beaufort Sea ◽

Ice Cover ◽

Short Wave ◽

Wave Radiation ◽

Short Wave Radiation ◽

Melting Period ◽

Fast Ice ◽

Made In

AbstractTwo Kipp hemispherical radiometers mounted back to back and suspended by an 18 m cable from a helicopter flying at an altitude of about 90 m were used to make measurements of incident and reflected short-wave radiation. The helicopter was brought to a hovering position at the instant of measurement to ensure that the radiometers were in the proper attitude and a photograph of the ice cover was taken at the same time. The observations were made in 1969 during 16 flights out of Tuktoyaktuk, Northwest Territories (lat. 69° 26’N., long. 133° 02’W.) over the fast ice extending 80 km north of Tuktoyaktuk. Values of albedo of the ice cover were found to decrease during the melting period according to the equation A = 0.59 —0.32P where P is the degree of puddling of the surface.

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Early Tertiary thermotectonic history of the northern Yukon and adjacent Northwest Territories, Arctic Canada

Canadian Journal of Earth Sciences ◽

10.1139/e17-109 ◽

1997 ◽

Vol 34 (10) ◽

pp. 1366-1378 ◽

Cited By ~ 5

Author(s):

Paul B. O'Sullivan ◽

Larry S. Lane

Keyword(s):

Northwest Territories ◽

Fission Track ◽

Middle Eocene ◽

Geothermal Gradient ◽

Crystalline Rock ◽

Early Eocene ◽

Channel Formation ◽

Rapid Cooling ◽

Early Tertiary ◽

History Of

Apatite fission-track data from 16 sedimentary and crystalline rock samples indicate rapid regional Early Eocene denudation within the onshore Beaufort–Mackenzie region of northwestern Canada. Rocks exposed in the area of the Big Fish River, Northwest Territories, cooled rapidly from paleotemperatures of >80–110 °C to <6 0°C at ca. 56 ± 2 Ma, probably in response to kilometre-scale denudation associated with regional structuring. The data suggest the region experienced a geothermal gradient of ~28 °C/km prior to rapid cooling, with ~2.7 km of section having been removed from the top of the exposed section in the Moose Channel Formation and ~3.8 km from the top of the exposed Cuesta Creek Member. Farther to the west, rocks exposed in the headwaters of the Blow River in the Barn Mountains, Yukon Territories, were exposed to paleotemperatures above 110 °C in the Late Paleocene prior to rapid cooling from these elevated paleotemperatures due to kilometre-scale denudation at ca. 56 ± 2 Ma. Exposure of these samples at the surface today requires that a minimum of ~3.8 km of denudation occurred since they began cooling below ~110 °C. The apatite analyses indicate that rocks exposed in the northern Yukon and Northwest Territories experienced rapid cooling during the Early Eocene in response to kilometre-scale denudation, associated with early Tertiary folding and thrusting in the northern Cordillera. Early Eocene cooling–uplift ages for onshore sections are slightly older than the Middle Eocene ages previously documented for the adjacent offshore foldbelt and suggest that the deformation progressed toward the foreland of the foldbelt through time.

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