scholarly journals Extensive jarosite deposits formed through auto-combustion and weathering of pyritiferous mudstone, Smoking Hills (Ingniryuat), Northwest Territories, Canadian Arctic – A potential Mars analogue

2021 ◽  
pp. 120634
Author(s):  
S.E. Grasby ◽  
J.B. Percival ◽  
I. Bilot ◽  
O.H. Ardakani ◽  
I.R. Smith ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Canadian Arctic ◽  
Auto Combustion

Communications facilities and user problems in the Canadian Arctic

Polar Record ◽  
1968 ◽  
Vol 14 (90) ◽  
pp. 305-314
Author(s):  
T. Ringereide
Keyword(s):  
Soviet Union ◽  
Northwest Territories ◽  
Indian Population ◽  
Total Population ◽  
Canadian Arctic ◽  
Yukon Territory ◽  
Land Area ◽  
Northern Boundary ◽  
The Soviet Union ◽  
The World

The total area of Canada (land area and fresh water) is around 10 million sq km, making it the second largest country in the world, second only to the Soviet Union.For various historic and economic reasons Canada's population of 20 million is very largely concentrated in the southern part of the country, with about twothirds of the population living in large urban centres. The heavy broken line on Fig 1 shows the northern boundary of the densely populated portion of Canada. Only 1·5 per cent of Canada's total population, or 300000 people, live north of this frontier, and out of this total only about 38000 live in the Yukon Territory and the Northwest Territories. The Yukon has a population of only twenty seven people per 1000 sq km, and the Northwest Territories of eight people per 1000 sq km. The total Eskimo population in both territories is about 13600 and the total Indian population some 8000.

HEXATYLUS MULVEYI N. SP. AND DELADENUS DURUS (COBB, 1922) THORNE, 1941 (NEMATODA: NEOTYLENCHIDAE) FROM THE CANADIAN ARCTIC

1964 ◽  
Vol 42 (4) ◽  
pp. 649-653 ◽  
Author(s):  
V. M. Das
Keyword(s):  
Northwest Territories ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Single Line

Hexatylus mulveyi n. sp. and Deladenus durus (Cobb, 1922) Thorne, 1941, collected from soil in the Lake Hazen area of Ellesmere Island, Northwest Territories, are figured and described. H. mulveyi differs from H. viviparus Goodey, 1926 in the shape of the tail, the number of incisures, the single line of oocytes in the ovary, and in the vulva having elevated lips.

scholarly journals Predaceous Water Beetles (Coleoptera: Adephaga: Dytiscidae, Gyrinidae) Collected Along the Horton and Thelon Rivers in the Arctic Central Barrens of Canada

2004 ◽  
Vol 118 (3) ◽  
pp. 425 ◽  
Author(s):  
Helena V. Shaverdo ◽  
Donna J. Giberson
Keyword(s):  
Northwest Territories ◽  
Canadian Arctic ◽  
The Arctic ◽  
Water Beetles ◽  
First Time

Predaceous water beetles were collected during expeditions along two northern Canadian rivers during 2000 and 2002. Twelve species of Dytiscidae (including 11 named species and one additional genus identified from a larva) and one species of Gyrinidae are recorded from 20 sites along the Horton and Thelon rivers in the Central Barrens area of the Canadian Arctic. These records represent an extension of the distributions of four species to the northeast in the Northwest Territories (NWT), and two species to the northwest in Nunavut (NU). Oreodytes sanmarkii is reported for NWT and for the mainland of NU for the first time. Ilybius erichsoni, Hydroporus geniculatus, and Gyrinus opacus are reported for NU for the first time. Five species were recorded for the first time from the Southern Arctic ecozone, and one from the Taiga Shield ecozone. The majority of specimens were collected in habitats that were consistent with those previously known for each species.

scholarly journals Bunyavirus isolations from mosquitoes in the western Canadian Arctic

1977 ◽  
Vol 79 (1) ◽  
pp. 61-71 ◽  
Author(s):  
D. M. McLean ◽  
P. N. Grass ◽  
B. D. Judd ◽  
L. V. Ligate ◽  
K. K. Peter
Keyword(s):  
Salivary Glands ◽  
Northwest Territories ◽  
Viral Antigen ◽  
Canadian Arctic ◽  
Encephalitis Virus ◽  
Snowshoe Hare ◽  
Infection Rates ◽  
Natural Vector ◽  
Culiseta Inornata ◽  
Aedes Communis

SUMMARYStrains of California encephalitis virus (snowshoe hare subtype) were isolated from 8 of 475 pools comprising 23747 unengorged female mosquitoes of five species collected at three of six locations throughout the Mackenzie Valley of the Northwest Territories, Canada, from latitudes 60 to 69° N between 10 and 24 July 1976. Minimum field infection rates included 1:2734 for Aedes communis, 1:256 to 1:3662 for A. hexodontus and 1:911 to 1:1611 for A. punctor. Northway virus was also isolated from 1 of 3662 A. hexodontus mosquitoes collected at Inuvik (69° N, 135° W). Transmission of CE virus by A. communis infected by feeding on virus in defibrinated blood and incubation at 0, 13 and 23 °C for 13–20 days clearly demonstrates the importance of this species as a natural vector, and transmission of CE virus by Culiseta inornata after incubation at 0 and 13 °C following intrathoracic injection strengthens evidence of its role as a natural vector. Immunofiuorescence was less reliable than imunoperoxidase for detection of CE viral antigen in mosquito salivary glands.

New species of the cyathaspididPoraspis(Agnatha: Heterostraci) from the Late Silurian and Early Devonian of Northwest Territories, Canada

1998 ◽  
Vol 72 (2) ◽  
pp. 360-370 ◽  
Author(s):  
David K. Elliott ◽  
Elizabeth J. Loeffler ◽  
Yuhai Liu
Keyword(s):  
New Species ◽  
Eastern Europe ◽  
Northwest Territories ◽  
Canadian Arctic ◽  
Geographic Range ◽  
Center Of Origin ◽  
Early Devonian

Four new species of cyathaspidid extend the range of the genusPoraspisback into the Late Silurian and indicate that the Canadian arctic was its center of origin.Poraspis heintzaen. sp., P. cracens n. sp.,P. thulesn. sp. andP. parmulan. sp. also increase the known geographic range of the genus which had previously been reported only from the District of Mackenzie (NWT, Canada), Spitsbergen, western and eastern Europe. The identification ofP. sericeafrom the upper member of the Peel Sound Formation substantiates correlation of this interval with thecrouchizone of the Anglo-Welsh Borders, and provides another rare example of a species common to the Canadian arctic and European successions.

Early Devonian eurypterids from the Northwest Territories of Arctic Canada

2000 ◽  
Vol 37 (8) ◽  
pp. 1167-1175 ◽  
Author(s):  
Simon J Braddy ◽  
Jason A Dunlop
Keyword(s):  
Northwest Territories ◽  
Marine Environment ◽  
Plant Material ◽  
Canadian Arctic ◽  
Arctic Canada ◽  
Early Devonian ◽  
Rock Formation

A new eurypterid fauna from the Lower Bear Rock Formation (Early Devonian, Emsian) of Anderson River, in the Northwest Territories of the Canadian Arctic, is described. The material comprises an almost complete specimen and five isolated carapaces of Erieopterus microphthalmus; an incomplete carapace and telson referred to Drepanopterus sp.; and an isolated prosomal appendage of Carcinosoma sp. Associations include actinopterygian, sarcopterygian, and acanthodian fish, as well as lingulids, conchostracans, ostracodes, coprolites, and plant material. A nearshore marine environment is inferred. This assemblage provides the first Canadian record of Drepanopterus and the youngest Canadian occurrences of erieopterid and carcinosomatid eurypterids.

scholarly journals Glacial and Sea Level History of Lowther and Griffith Islands, Northwest Territories: A Hint of Tectonics

2007 ◽  
Vol 47 (2) ◽  
pp. 133-145 ◽  
Author(s):  
Arthur S. Dyke
Keyword(s):  
Northwest Territories ◽  
Sea Level ◽  
Ice Sheet ◽  
Canadian Arctic ◽  
Laurentide Ice Sheet ◽  
Structural Elements ◽  
Ice Flow ◽  
Ice Load ◽  
Last Glaciation ◽  
History Of

ABSTRACT Lowther and Griffith islands, in the centre of Parry Channel, were overrun by the Laurentide Ice Sheet early in the last glaciation. Northeastward Laurentide ice flow persisted across at least Lowther Island until early Holocene déglaciation. Well constrained postglacial emergence curves for the islands confirm a southward dip of raised shorelines, contrary to the dip expected from the ice load configuration. This and previously reported incongruities may indicate regionally extensive tectonic complications of postglacial rebound aligned with major structural elements in the central Canadian Arctic Islands.

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