scholarly journals Continuation of the palaeomagnetic field work in eastern North Greenland

1981 ◽  
Vol 106 ◽  
pp. 95-98
Author(s):  
C Marcussen
Keyword(s):  
Field Work ◽  
Complete Collection ◽  
Rock Samples ◽  
Upper Proterozoic ◽  
Lower Palaeozoic ◽  
North Greenland

The aim of the 1980 fjeld work was to extend the collection of orientated rock samples from North Greenland obtained in 1979 (Abrahamsen & Marcussen, 1980). The material consists of Upper Proterozoic to Lower Palaeozoic sediments as well as the presumed interglacial sediments at Kap København (Table 5). The two years' palaeomagnetic field work has resulted in anearly complete collection of orientated rock samples from all formations older than the Silurian flysch. The collection may be divided into six stratigraphical units (figs 28, 29).

scholarly journals Notes on some Lower Palaeozoic to Tertiary faunas from eastern North Greenland

1974 ◽  
Vol 65 ◽  
pp. 18-23
Author(s):  
J.S Peel ◽  
P.R Dawes ◽  
J.C Troelsen
Keyword(s):  
Field Work ◽  
The South ◽  
Initial Field ◽  
North East ◽  
The North ◽  
Lower Palaeozoic ◽  
North Greenland

The north-east 'corner' of Greenland is geologically probably the least known region in North Greenland. Various expeditions have visited the coastal parts but geological detail, particularly faunal information, has remained surprisingly scarce. Initial field work by Koch (1923, 1925) and Troelsen (1949a, b, 1950) showed that a Precambrian to Silurian section - unfolded in the south, folded in the north - was unconformably overlain by a Carboniferous to Tertiary section, now referred to as the Wandel Sea basin (Dawes & Soper, 1973).

scholarly journals Investigation of Lower Palaeozoic rocks in northern East Greenland

1978 ◽  
Vol 90 ◽  
pp. 107-109
Author(s):  
P Frykman
Keyword(s):  
Field Work ◽  
East Greenland ◽  
Rock Samples ◽  
Lower Palaeozoic

Field work in 1977 was carried out primarily to collect rock samples for use in establishing a biozonation based on micro-fossils for the East Greenland Cambro-Ordovician sequence described by Cowie & Adams (1957). The most extensive sampling was done in the two type-sections of Cowie & Adams (1957) in Albert Heim Bjerge and Ella ø (fig. 35) in which macro-fossils are relatively sparse. In addition to this, an investigation was made of the virtuaIly unexplored C. H. Ostenfeld Nunatak in the Wordie Gletscher, from which Cowie & Adams (1957, p. 45) reported the presence of rocks belonging to the Hyolithus Creek Formation and the Cass Fjord Formation.

scholarly journals Lithostratigraphic framework of the Upper Proterozoic and Lower Palaeozoic deep water c1astic deposits of North Greenland

1982 ◽  
Vol 107 ◽  
pp. 1-20
Author(s):  
J.D Friderichsen ◽  
A.K Higgins ◽  
J.M Hurst ◽  
S.A.S Pedersen ◽  
N.J Soper ◽  
...  
Keyword(s):  
Deep Water ◽  
Carbonate Sediments ◽  
Early Ordovician ◽  
Late Precambrian ◽  
Upper Proterozoic ◽  
Lower Palaeozoic ◽  
North Greenland

The deep water clastic and subordinate carbonate sediments of the Franklinian Basin of North Greenland are assigned to 6 lithostratigraphic groups. The lowest, Skagen Group (new), consists of structureless quartzitic sandstones and phyllitic mudstones of ?late Precambrian to Cambrian age. The folIowing Paradisfjeld Group (revised) is dominated by lime mudstones and is probably of Cambrian age. Redeposited limestone conglomerates characterise thc top parts of thc group. Thc subscqucnt Polkorridoren Group (revised) consists of thick sandstone turbidite and mudstone units of Cambrian age. The overlying Vølvedal Group (new) consists of cherts, mudstones, turbiditic sandstones and resedimented chert and carbonate conglomerates and is of Cambrian to earliest Ordovician age. The folIowing Amundsen Land Group (new) is dominated by cherts and mudstones with resedimented limestone conglomerates, and is of early Ordovician to early Silurian age. The youngest, Peary Land Group, is dominated by turbiditic sandstones and mudstones and ranges in age from earliest Silurian to possibly earliest Devonian. The 'Sydgletscher Group' is disbanded: the component parts are placed in the Polkorridoren Group, Vølvedal Group, Amundsen Land Group and Peary Land Group.

scholarly journals The Precambrian, Eocambrian and early Palaeozoic stratigraphy of the Jørgen Brønlund Fjord area, Peary Land, North Greenland

1971 ◽  
Vol 96 ◽  
pp. 1-42
Author(s):  
H.F Jepsen
Keyword(s):  
Lower Cambrian ◽  
Field Work ◽  
Sedimentary Sequence ◽  
Long Period ◽  
Composite Section ◽  
Lower Palaeozoic ◽  
Early Palaeozoic ◽  
North Greenland

The sedimentary sequence in the platform area (approx. 2500 km2) around Jørgen Brønlund Fjord, North Greenland, has been mapped, and sections through the Precambrian, Eocambrian and Lower Palaeozoic sequence are described. After a summary of the previous geological field work carried out in the area, a lithological description of a composite section through the sequence below the Lower Cambrian Brønlund Fjord Dolomite (Troelsen, 1949) is given. This sequence, which is about 1000 m thick, is divided into four formations – in ascending order: Inuiteq Sø Formation (sandstone), Morænesø Formation (tillite and dolomite), Portfjeld Formation (dolomite) and Buen Formation (sandstone and shale). The first three named formations are separated by two unconformities both representing a long period of erosion. The strata are cut by two dolerite sequences, of which the older (the Midsommersø dolerites) is of Precambrian age and intrudes only the Inuiteq Sø Formation. Intrusions of the younger sequence penetrate all the strata in the Jørgen Brønlund Fjord area and are regarded as post-Palaeozoic. In the last section the chronostratigraphy and the correlation with neighbouring areas are discussed. Special attention is given to the two newly discovered erosional unconformities, which together with the tillite occurrence and the radiometric K/Ar dated Midsommersø dolerites, throw new light on the stratigraphy of North Greenland.

scholarly journals Structural geology of central Peary Land, North Greenland

1979 ◽  
Vol 88 ◽  
pp. 55-62
Author(s):  
S.A.S Pedersen
Keyword(s):  
Field Work ◽  
Aerial Photographs ◽  
Laboratory Studies ◽  
Fold Belt ◽  
Ice Caps ◽  
The North ◽  
Lower Palaeozoic ◽  
Southern Border ◽  
Structural Aspects ◽  
North Greenland

The region investigated in 1978 between Jørgen Brønlund Fjord - Øvre Midsommersø in the south and Frederick E. Hyde Fjord in the north consists of c. 1½ km thiekness of Lower Palaeozoic carbonates overlain by an up to 1 km thick series of Silurian flysch (Christie & Peel, 1977). In general the region is part of the Palaeozoic platform that ean be divided into three major E-W trending physiographic belts: a southern belt where the carbonates form plateaus incised by steep valleys, a central belt consisting of characteristic conical mountains marked by concentric terraces of resistant sandstone beds in the flyseh (Dawes, 1976, fig. 249), and in the fold belt to the north the mountains rise up to altitudes of 1000-1500 m and are covered by extensive ice caps (fig. 17). The southern border of the region, the Øvre Midsommersø - Jørgen Brønlund Fjord area, was mapped by Jepsen (1971) while the Lower Palaeozoic stratigraphy in the central part af the region has been established by Christie & Peel (1977) at Børglum Elv. Some structural aspects af the gealogy at Frederick E. Hyde Fjord are briefly described by Dawes (1971) and Dawes & Soper (1973). Prior to the field work a comprehensive photogeological interpretation was carried out on vertical aerial photographs (seale c. 1:60000) and compiled on six uneontoured l: 100000 photomosaic maps. The 1978 field work and laboratory studies using a Kern PG 2 photogrammetric instrument form the first detailed study of the fold belt margin. For descriptive purposes the region investigated in 1978 has been subdivided into seven areas (fig. 17), the main struetural features of which form the basis of this report.

Investigations of past climate and sea-ice variability in the fjord area by Station Nord, eastern North Greenland

1969 ◽  
Vol 35 ◽  
pp. 67-70 ◽  
Author(s):  
Niels Nørgaard-Pedersen ◽  
Sofia Ribeiro ◽  
Naja Mikkelsen ◽  
Audrey Limoges ◽  
Marit-Solveig Seidenkrantz
Keyword(s):  
Sea Ice ◽  
Outer Part ◽  
Late Summer ◽  
Field Work ◽  
The Arctic ◽  
Research Station ◽  
Fjord System ◽  
Sea Bottom ◽  
Satellite Radar ◽  
North Greenland

The marine record of the Independence–Danmark fjord system extending out to the Wandel Hav in eastern North Greenland (Fig. 1A) is little known due to the almost perennial sea-ice cover, which makes the region inaccessible for research vessels (Nørgaard-Pedersen et al. 2008), and only a few depth measurements have been conducted in the area. In 2015, the Villum Research Station, a new logistic base for scientific investigations, was opened at Station Nord. In contrast to the early exploration of the region, it is now possible to observe and track the seasonal character and changes of ice in the fjord system and the Arctic Ocean through remote sensing by satellite radar systems. Satellite data going back to the early 1980s show that the outer part of the Independence–Danmark fjord system is characterised by perennial sea ice whereas both the southern part of the fjord system and an area 20–30 km west of Station Nord are partly ice free during late summer (Fig. 1B). Hence, marine-orientated field work can be conducted from the sea ice using snow mobiles, and by drilling through the ice to reach the underlying water and sea bottom.

Terranes

1992 ◽  
Vol 13 (1) ◽  
pp. 1-4 ◽  
Author(s):  
B. J. Bluck ◽  
W. Gibbons ◽  
J. K. Ingham
Keyword(s):  
Hanging Wall ◽  
Fault System ◽  
Upper Proterozoic ◽  
Lower Proterozoic ◽  
Central Highland ◽  
Thrust Zone ◽  
Lower Palaeozoic ◽  
Moine Thrust Zone ◽  
Shallow Marine Sediments ◽  
Northern Highlands

AbstractThe Precambrian and Lower Palaeozoic foundations of the British Isles may be viewed as a series of suspect terranes whose exposed boundaries are prominent fault systems of various kinds, each with an unproven amount of displacement. There are indications that they accreted to their present configuration between late Precambrian and Carboniferous times. From north to south they are as follows.In northwest Scotland the Hebridean terrane (Laurentian craton in the foreland of the Caledonian Orogen) comprises an Archaean and Lower Proterozoic gneissose basement (Lewisian) overlain by an undeformed cover of Upper Proterozoic red beds and Cambrian to early mid Ordovician shallow marine sediments. The terrane is cut by the Outer Isles Thrust, a rejuvenated Proterozoic structure, and is bounded to the southeast by the Moine Thrust zone, within the hanging wall of which lies a Proterozoic metamorphic complex (Moine Supergroup) which constitutes the Northern Highlands terrane. The Moine Thrust zone represents an essentially orthogonal closure of perhaps 100 km which took place during Ordovician-Silurian times (Elliott & Johnson 1980). The Northern Highlands terrane records both Precambrian and late Ordovician to Silurian tectonometamorphic events (Dewey & Pankhurst 1970) and linkage with the Hebridean terrane is provided by slices of reworked Lewisian basement within the Moine Supergroup (Watson 1983).To the southwest of the Great Glen-Walls Boundary Fault system lies the Central Highlands (Grampian) terrane, an area dominated by the late Proterozoic Dalradian Supergroup which is underlain by a gneissic complex (Central Highland Granulites) that has been variously interpreted as either older

scholarly journals Upper Proterozoic and Lower Palaeozoic strata in northern East Greenland

1989 ◽  
Vol 145 ◽  
pp. 103-108
Author(s):  
M.J Hambrey ◽  
J.S Peel ◽  
M.P Smith
Keyword(s):  
North Atlantic ◽  
The Arctic ◽  
North Atlantic Region ◽  
Atlantic Region ◽  
East Greenland ◽  
Upper Proterozoic ◽  
Clastic Sediments ◽  
Upper Riphean ◽  
Lower Palaeozoic ◽  
The Subject

The Caledonides of East Greenland contain the best exposures of Upper Riphean to Ordovician sediments in the Arctic - North Atlantic region. At its thickest the sequence contains 13 km of Eleonore Bay Group clastic sediments and carbonates, the 0.8 km thick Tillite Group and 3 km of Cambro-Ordovician strata (Henriksen & Higgins, 1976; Henriksen, 1985). These sediments crop out in a belt stretching for nearly 300 km through the fjord region, between 71° 38' and 74° 25'N. Those in the northern part of the region, between Brogetdal in Strindberg Land and southern Payer Land, and especiaIly Albert Heim Bjerge and C. H. Ostenfeld Nunatak, were the subject of investigation during 1988 (figs 1, 2).

scholarly journals Eastern North Greenland 1994, the 1:500 000 mapping project

1995 ◽  
Vol 165 ◽  
pp. 53-58
Author(s):  
N Henriksen
Keyword(s):  
Field Work ◽  
Fully Integrated ◽  
General Overview ◽  
North East ◽  
Field Season ◽  
Geological Map ◽  
Field Campaigns ◽  
Council Of Ministers ◽  
North Greenland ◽  
Land Region

The second field season of the Geological Survey of Greenland's (GGU) mapping project in eastern North Greenland (1993–95) was carried out according to plan and with full accomplishment of all geoscientific goals. The programme aims at producing a general overview of the onshore geology of the Jokelbugten to Kronprins Christian Land region (78–81 °N) in eastern North Greenland (Fig. 1) to be compiled as sheet no. 9 in GGU's 1:500 000 geological map sheet series; this is the last remaining incomplete map sheet at this scale in North and North-East Greenland. The field work was initiated in 1993 with limited reconnaissance work (Henriksen, 1994a), and in 1994 the first of two more intensive field campaigns was carried out. In addition to establishing a general overview of the regional geology the work aims at obtaining an evaluation of the economic geological potential of the region, in respect of both minerals and hydrocarbons. Two glaciological programmes were fully integrated with the project: one was carried out by the Alfred Wegener Institute (AWi), Bremerhaven, Germany, while the other was partly based on a special grant from the Nordic Council of Ministers.

scholarly journals Wandel Sea Basin: basin analysis – a summary

1995 ◽  
Vol 165 ◽  
pp. 42-48
Author(s):  
E Håkansson ◽  
L Stemmerik
Keyword(s):  
Financial Support ◽  
Research Council ◽  
Science Research ◽  
Field Work ◽  
Geological Mapping ◽  
Basin Analysis ◽  
Geological Survey ◽  
Natural Science Research Council ◽  
Field Season ◽  
North Greenland

In 1991 a three year research project was initiated by the Geological Institute, University of Copenhagen with financial support from the Ministry of Energy, the Danish Natural Science Research Council and the Carlsberg Foundation. The 'Wandel Sea Basin: basin analysis' project was carried out in collaboration with the Geological Survey of Greenland and included field work in North Greenland; in eastern Peary Land in 1991 and Amdrup Land in 1993 (Fig. 1; Hakansson et al., 1994). The project is a continuation of earlier investigations in the Wandel Sea Basin carried out during geological mapping of North Greenland by the Geological Survey of Greenland in 1978–1980 and during later expeditions to the area (e.g. Hakansson, 1979; Hakansson et al., 1981, 1989, 1991, 1994). Hydrocarbon related studies of the Wandel Sea Basin were continued during the 1994 field season (Stemmerik et al., this report).

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