scholarly journals Quaternary deposits in the Frederikshåb district, South-West Greenland

1966 ◽  
Vol 11 ◽  
pp. 35-36
Author(s):  
M Kelly
Keyword(s):  
Quaternary Geology ◽  
Quaternary Deposits ◽  
West Greenland ◽  
South West ◽  
Inland Ice ◽  
Free Area ◽  
Outer Coast

The Quaternary geology of an area of approximately 3000 km2 in the vicinity of Frederikshåb has been mapped during the summers 1964-1966. In this part of Greenland the unglaciated land between the outer coast and the margin of the Inland Ice is 40-70 km wide. The ice-free area is mostly a plateau at about 1000 m with isolated tops reaching 1600 m, and is deeply dissected by fjords some of which reach the ice margin. Small cirque glaciers occur in the higher parts of the plateau.

scholarly journals The Nordre Strømfjord shear zone and the Arfersiorfik quartz diorite in Arfersiorfik, the Nagssugtoqidian orogen, West Greenland

2006 ◽  
Vol 11 ◽  
pp. 145-162 ◽  
Author(s):  
Kai Sørensen ◽  
John A. Korstgård ◽  
William E. Glassley ◽  
Bo Møller Stensgaard
Keyword(s):  
Shear Zone ◽  
Volcanic Rocks ◽  
Quartz Diorite ◽  
Ductile Deformation ◽  
Chemical Compositions ◽  
West Greenland ◽  
South West ◽  
Wide Range ◽  
Inland Ice ◽  
Zone Deformation

The Nordre Strømfjord shear zone in the fjord Arfersiorfik, central West Greenland, consists of alternating panels of supracrustal rocks and orthogneisses which together form a vertical zone up to 7 km wide with sinistral transcurrent, ductile deformation, which occurred under middle amphibolite facies conditions. The pelitic and metavolcanic schists and paragneisses are all highly deformed, while the orthogneisses appear more variably deformed, with increasing deformation evident towards the supracrustal units. The c. 1.92 Ga Arfersiorfik quartz diorite is traceable for a distance of at least 35 km from the Inland Ice towards the west-south-west. Towards its northern contact with an intensely deformed schist unit it shows a similar pattern of increasing strain, which is accompanied by chemical and mineralogical changes. The metasomatic changes associated with the shear zone deformation are superimposed on a wide range of original chemical compositions, which reflect magmatic olivine and/ or pyroxene as well as hornblende fractionation trends. The chemistry of the Arfersiorfik quartz diorite suite as a whole is comparable to that of Phanerozoic plutonic and volcanic rocks of calc-alkaline affinity.

scholarly journals Quaternary deposits around Holsteinsborg

1968 ◽  
Vol 15 ◽  
pp. 23-24
Author(s):  
A Weidick
Keyword(s):  
Submarine Canyon ◽  
Drainage Channel ◽  
Ice Ages ◽  
Quaternary Deposits ◽  
West Greenland ◽  
Inland Ice

The area investigated in 1967 is situated between 66°20' and 67°10' N. 52°30' and 54°W. and is part of the high outer coastal terrain of central West Greenland. The greatest heights - more than 1000 m - are seen in the northernmost and southernmost parts of the area. These parts are separated by an E-W-running depression around Ikertoq fjord. the western continuation of which is seen offshore in Holsteinsborg Dyb (the Holsteinsborg trough), a submarine canyon 500 m deep separating Store Hellefiske Banke from Lille Hellefiske Banke. Whilst the banks are thought to be ice margin deposits which accumulated during the ice ages, the Holsteinsborg trough acted during these times as a drainage channel for the Inland Ice.

scholarly journals Quaternary geology of the Ivigtut-Nunarssiut region, South-West Greenland

1977 ◽  
Vol 85 ◽  
pp. 64-67
Author(s):  
M Kelly
Keyword(s):  
Quaternary Geology ◽  
Gravity Survey ◽  
The South ◽  
West Greenland ◽  
The North ◽  
South West ◽  
Southern Area ◽  
Pack Ice ◽  
Ice Conditions ◽  
Bad Weather

In order to provide data for the 1:500000 map sheet (Quaternary geology of Greenland, sheet l) a reconnaissance was made of the Quaternary geology of the Ivigtut and Nunarssuit regions shown on Fig. 16, in conjunction with a gravity survey carried out by D. J. Blunden, University of London. The coverage of the southern area, however, was very scant due to prolonged bad weather and difticult pack ice conditions. In addition the survey of marine limits was extended to the adjacent Frederikshåb and Neria areas to the north. The topography of the area consists ofa rolling plateau descending from about 800 m in the north to less than 300 m in the south, dissected by steep sided fjords and inlets. Notable are the 'coastal mountains' - relatively sharp featured hills standing above the plateau leveion the western ends of peninsulas and offshore islands. Other isolated eminences occur inland up to c. 1200 m.

scholarly journals New zircon ages from the Tasiusarsuaq terrane, southern West Greenland

2008 ◽  
Vol 15 ◽  
pp. 73-76 ◽  
Author(s):  
Tomas Næraa ◽  
Anders Scherstén
Keyword(s):  
Continental Crust ◽  
Spatial Relationship ◽  
Outer Part ◽  
The South ◽  
West Greenland ◽  
North East ◽  
Geological Processes ◽  
South West ◽  
Terrane Accretion ◽  
Inland Ice

In the last three field seasons the Geological Survey of Denmark and Greenland (GEUS) has undertaken mapping in the south-eastern part of the Nuuk region in southern West Greenland, and here we present new zircon ages that help constrain the northern boundary of the Tasiusarsuaq terrane. The Archaean geology of the Nuuk region is commonly interpreted as a tectonic collage assembled through lateral accretion and collision of oceanic and continental slivers and blocks (e.g. Friend & Nutman 2005). Popular jargon de scribes these as terranes, bounded by faults or mylonite zones and characterised by rocks of contrasting origin on either side of their tectonic boundaries (Coney et al. 1980). The Isukasia and Færingehavn terranes (Figs 1, 2) are the oldest terranes at ≥3.75 Ga, and extend from the outer part of Godthåbsfjord in the south-west to the margin of the Inland Ice in the north-east, but they might not have a common geological history (Friend & Nutman 2005). The Tre Brødre terrane is mainly represented by the Ikkatoq gneiss and occurs in close spatial relationship with the Færingehavn terrane, and also as a pronounced thrust unit along the Qarliit Nunaat thrust between the Færingehavn and Tasiusarsuaq terranes (Fig. 1; Nutman et al. 1989). The terrane boundaries in the inner fjord region near the Inland Ice margin are less well constrained; the Tre Brødre terrane extends into the region from the south-west, the Kapisilik terrane is defined from the northern and eastern part and borders the Tasiusarsuaq terrane to the south and possibly to the east. The terrane accretion is believed to have taken place in two events. The first terrane accretion is defined from the northern part of the region, and possibly involves the Isukasia, Kapisilik and Akia terranes. The thermal event stitching these terranes is dated to c. 2.99–2.95 Ga (Fig. 2; Hanmer et al. 2002; Friend & Nutman 2005). The second accretion phase of the major continental blocks is believed to have occurred at around 2.725–2.71 Ga. This second event is well described, and in- cludes anatexis and emplacement of continental crust-derived granites, which are associated with contemporaneous metamorphism (Friend et al. 1996). Figure 2 outlines regional plutonic, metamorphic and su- pracrustal events. Individual terranes were formed during relatively short time periods with active geological processes of creation and recycling of continental crust, and most of the terranes follow a similar pattern of development. The first plutonic events consisted of primitive magmas and produced ton a- lite–trondhjemite–granodiorite (TTG) and dioritic gne isses. Younger, more evolved granitic magmas were often intruded simultaneously with high-grade metamorphism. This development may reflect a stabilisation of the individual terranes.

The structure and function of the Greenland Health Services

Polar Record ◽  
1974 ◽  
Vol 17 (107) ◽  
pp. 139-141
Author(s):  
Søren Andersen
Keyword(s):  
Local Government ◽  
Health Services ◽  
Ice Sheet ◽  
Structure And Function ◽  
The State ◽  
West Greenland ◽  
South West ◽  
And Function ◽  
Free Area

Greenland, the world's largest island, stretches some 2 700 km from north to south and about 1 050 km from east to west. It has a total area of 2175 km2, five-sixths of which is covered by an ice sheet. About 40 000 Greenlanders and 7 000 Danes inhabit a coastal ice-free area of about 150 000 km2, most of which is in south-west Greenland. Since 1953, Greenland has been an integral part of the Kingdom of Denmark and is represented by two elected members of the Danish Parliament (Folketing), and it has its own local government. The country is administered from Denmark by the Ministry of Greenland (Ministeriet for Grønland) and, in Greenland, the Governor (Landshøvdingen) is the chief representative of the State.

Airborne geophysical surveys in Greenland – 1996 update

1997 ◽  
pp. 75-79
Author(s):  
Robert W. Stemp
Keyword(s):  
Mineral Exploration ◽  
Geological Mapping ◽  
Digital Data ◽  
Magnetic Survey ◽  
Aeromagnetic Survey ◽  
West Greenland ◽  
South West ◽  
Geophysical Surveys ◽  
The Government ◽  
Airborne Geophysical Data

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Stemp, R. W. (1997). Airborne geophysical surveys in Greenland – 1996 update. Geology of Greenland Survey Bulletin, 176, 75-79. https://doi.org/10.34194/ggub.v176.5069 _______________ Two major airborne geophysical surveys were carried out in 1996, the third year of a planned five-year electromagnetic and magnetic survey programme (project AEM Greenland 1994–1998) financed by the Government of Greenland, and the second year of an aeromagnetic survey programme (project Aeromag) jointly financed by the governments of Denmark and Greenland; both projects are managed by the Geological Survey of Denmark and Greenland (GEUS). The two 1996 surveys were: 1) Project Aeromag 1996 in South-West and southern West Greenland;2) Project AEM Greenland 1996 in South-West Greenland. All areas surveyed and planned for future surveys as of March 1997 are shown in Figure 1. Results of both the 1996 surveys were released in March 1997, as a continuation of a major effort to make high quality airborne geophysical data available for both mineral exploration and geological mapping purposes. The data acquired are included in geoscientific databases at GEUS for public use; digital data and maps may be purchased from the Survey. The main results from the 1996 surveys are described in Thorning & Stemp (1997) and Stemp (1997). Two further new airborne surveys have already been approved for data acquisition during the 1997 field season, with subsequent data release in March 1998. A summary of all surveys completed, in progress or planned since the formal inception of project AEM Greenland 1994–1998 is given in Table 1. The programme was expanded to include a separate regional aeromagnetic survey in 1995, provisionally for 1995–1996, with extension subject to annual confirmation and funding.

Qaanaaq 2001: mineral exploration reconnaissance in North-West Greenland

2002 ◽  
pp. 133-143
Author(s):  
Bjørn Thomassen ◽  
Peter R. Dawes ◽  
Agnete Steenfelt ◽  
Johan Ditlev Krebs
Keyword(s):  
Mineral Exploration ◽  
Mining Industry ◽  
Field Work ◽  
Original Series ◽  
West Greenland ◽  
North West ◽  
Ice Caps ◽  
High Plateau ◽  
Set Up ◽  
Inland Ice

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Thomassen, B., Dawes, P. R., Steenfelt, A., & Krebs, J. D. (2002). Qaanaaq 2001: mineral exploration reconnaissance in North-West Greenland. Geology of Greenland Survey Bulletin, 191, 133-143. https://doi.org/10.34194/ggub.v191.5141 _______________ Project Qaanaaq 2001, involving one season’s field work, was set up to investigate the mineral occurrences and potential of North-West Greenland between Olrik Fjord and Kap Alexander (77°10´N – 78°10´N; Fig. 1). Organised by the Geological Survey of Denmark and Greenland (GEUS) and the Bureau of Minerals and Petroleum (BMP), Government of Greenland, the project is mainly funded by the latter and has the overall goal of attracting the interest of the mining industry to the region. The investigated region – herein referred to as the Qaanaaq region – comprises 4300 km2 of ice-free land centred on Qaanaaq, the administrative capital of Qaanaap (Thule) municipality. Much of the region is characterised by a 500–800 m high plateau capped by local ice caps and intersected by fjords and glaciers. High dissected terrain occurs in Northumberland Ø and in the hinterland of Prudhoe Land where nunataks are common along the margin of the Inland Ice.

scholarly journals Contribution to the lichen biota of South West Greenland. Ivittuut area

Botanica ◽  
2018 ◽  
Vol 24 (2) ◽  
pp. 143-149
Author(s):  
Eric Steen Hansen
Keyword(s):  
West Greenland ◽  
South West ◽  
Lichen Biota

Abstract Hansen E. S., 2018: Contribution to the lichen biota of South West Greenland. Ivittuut area. - Botanica, 24(2): 142-149. The paper lists 180 lichen taxa from Ivittuut area, South West Greenland. Nine lichen taxa are new to South West Greenland, viz. Aspicilia aquatica, A. berntii, Candelariella dispersa, Cephalophysis leucospila, Endocarpon pulvinatum, Ionaspis suaveolens, Lecanora atromarginata, Thelidium pyrenophorum and Vestergrenopsis elaeina.

scholarly journals Quaternary deposits between the Sukkertoppen ice cap and Nordre Strømfjord

1970 ◽  
Vol 28 ◽  
pp. 23-25
Author(s):  
A Weidick ◽  
N.W Ten Brink
Keyword(s):  
Land Area ◽  
The West ◽  
Quaternary Deposits ◽  
Sea Levels ◽  
West Greenland ◽  
Marine Deposits ◽  
Ice Cap

The area investigated during 1969 is located approximate1y between 66° 10' and 67° 30' N, and 50° and 52° W, the eastem half of the West Greenland ice-free land area transected by Søndre Strømfjord. The principal objectives of the work were to map and describe the glacial and emerged marine deposits for a Quatemary map at 1:500 000 scale, and to collect material for establishing a radiometric chronology of former ice-margin positions and sea levels. In order to study as large an area as possible, the investigations north of Søndre Strømfjord and Sondrestrom Airbase were conducted by A. Weidick, the area south of this by N. W. Ten Brink.

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