scholarly journals Field work in 1986 in the Fiskefjord area, southern West Greenland

1987 ◽  
Vol 135 ◽  
pp. 36-42
Author(s):  
A.A Garde ◽  
S.B Jensen ◽  
M Marker
Keyword(s):  
Field Work ◽  
The South ◽  
Field Mapping ◽  
West Greenland ◽  
Basement Rocks ◽  
Outer Coast

Field mapping of Archaean basement rocks for the Fiskefjord map sheet at the scale 1:100 000, initiated in 1980 (Garde & McGregor, 1982; Garde, 1984, 1986), was continued by four teams in June-August 1986. The authors worked along the outer coast and in the vicinity of Fiskefjord (fig. 1) supported by rubber dinghies and the GGU cutter J. F. Johnstrup. Mapping around the lake Quagssup taserssua and reconnaissance mapping on the northern parts of Bjørneøen and Storø was supported by a Bell Jet Ranger helicopter. V. R. McGregor continued his mapping at the south-western corner of the map sheet area for three weeks in August.

scholarly journals Field investigations in the Precambrian terrain of the Thule district, North-West Greenland

1979 ◽  
Vol 95 ◽  
pp. 14-22
Author(s):  
P.R Dawes
Keyword(s):  
Field Work ◽  
Crystalline Basement ◽  
Field Mapping ◽  
West Greenland ◽  
North West ◽  
Field Investigations ◽  
Precambrian Terrain ◽  
Outer Coast ◽  
Three Phases

The field mapping of the Precambrian crystalline basement and overlying Thule Group of the Thule district aimed at the production of a 1:500000 map sheet between 75°15'N and 78°N was continued in July and August (fig. 5). The field work was split up, due to the varying availability of transport facilities, into three phases. (1) The charter of a Bell 204 helicopter from Thule Air Base enabled mapping in western Inglefield Land, and in the nunatak terrain of Prudhoe Land and Melville Bugt. (2) Investigation of the outer coast of western Melville Bugt was carried out with the aid of GGU cutter K. J. V. Steenstrup. (3) Detailed stratigraphical work in the middle and upper part of the Thule Group was based on foot traverses from Thule Air Base.

scholarly journals Field work between Fiskefjord and Godthåbsfjord, southern West Greenland

1984 ◽  
Vol 120 ◽  
pp. 45-50
Author(s):  
A.A Garde
Keyword(s):  
Granulite Facies ◽  
Field Work ◽  
Precambrian Basement ◽  
The South ◽  
West Greenland ◽  
Basement Rocks ◽  
Logistic Support

The 1980-1981 field work in Precambrian basement rocks for the Fiskefjord map sheet was continued in 1983. V. R. McGregor mapped granulite facies gneisses south of outer Fiskefjord in the south-western part of the map sheet area. The author worked inland between Godthåbsfjord and Fiskefjord from the eastern map sheet boundary at 50°54'E westwards to 51°45'E (fig. 22) and some notes concerning the lithologies, geometry and geochronology of this area are presented below. The GGU cutter K. J. V. Steenstrup and a Jet Ranger helicopter on weekly charter from Godthåb provided logistic support for the two Fiskefjord teams and for four teams mapping in the Ivisårtoq area (see Brewer et al., this report) as well as for the GGU glaciological station at Qamanârssûp serrnia.

scholarly journals New methods for the geological analysis of Tertiary volcanic formations on Nuussuaq and Disko, central West Greenland, using multi-model photogrammetry

1992 ◽  
Vol 156 ◽  
pp. 19-34
Author(s):  
A.K Pedersen ◽  
K.S Dueholm
Keyword(s):  
Volcanic Eruption ◽  
Field Work ◽  
South Coast ◽  
The South ◽  
West Greenland ◽  
Model Method ◽  
New Methods ◽  
Clastic Sediments ◽  
Series Of Experiments ◽  
Flow Directions

A series of experiments with multi-model photogrammetry were made during the compilation of a 80 km long section along the south coast of Nuussuaq. The section covers a range of Tertiary volcanic lithologies which overlie Mesozoic to Tertiary clastic sediments. The multi-model method allows the geological analyses of flat-lying lithologies in steep or inaccessible terrain and the compilation of detailed sections, profiles, and block diagrams. Drawing of sections or maps is combined with accurate structural measurements to document the flow directions of both subaerial and subaqueous volcanic units and to demonstrate syn-and post-volcanic basin movements and the location of volcanic eruption sites. Multi-model photogrammetry experiments made by compiling the geology of areas already covered by field work has led to major new discoveries. Similar experiments made on areas, which had not been visited in the field before the compilation, but which were visited later, demonstrates that the method is an important new tool in geological reconnaissance.

scholarly journals Epithermal gold and massive sulphide mineralisation in oil impregnated Palaeogene volcanic rocks of Ubekendt Ejland,West Greenland

2004 ◽  
Vol 4 ◽  
pp. 77-80 ◽  
Author(s):  
Stefan Bernstein ◽  
Christian Knudsen
Keyword(s):  
East Coast ◽  
Volcanic Rocks ◽  
Field Work ◽  
Hydrothermal Activity ◽  
Massive Sulphide ◽  
Sulphide Mineral ◽  
The South ◽  
West Greenland ◽  
Sulphide Mineralisation ◽  
Volcaniclastic Rocks

The discovery in 2002 of a gold mineralised quartz-carbonate vein at Ubekendt Ejland, central West Greenland, yielding 0.6 ppm Au over 0.7 m, led to a reconnaissance sampling project in summer 2003. Most of the accessible quartz-carbonate veins on the south-east coast of the island (Figs 1, 2) were sampled during boat-supported field work. Massive sulphide mineral deposits (Fe-Zn-Pb) were located in the centre of brecciated quartz-carbonate vein systems at several places along the south and south-east coast of the island, and gold anomalies mainly associated with the occurrence of the massive sulphides were identified. Pervasive hydrothermal alteration of the volcanic wall rocks surrounds the quartz-carbonate vein systems, which comprise low-temperature mineral assemblages dominated by dolomite and veined by chalcedony and fibrous silica. Evidence of oil migration into volcaniclastic rocks prior to the intense hydrothermal activity was found in several places in the form of organic carbon, interpreted to be pyrobitumen, that infills pores and cavities in hyaloclastites.

scholarly journals High temperature pyrrhotite and telluric iron mineralisations in western Disko, central West Greenland

1975 ◽  
Vol 75 ◽  
pp. 51-53
Author(s):  
F Ulff-Møller
Keyword(s):  
High Temperature ◽  
West Coast ◽  
Field Work ◽  
The South ◽  
The West ◽  
Joint Zone ◽  
West Greenland

The main purpose of the summer field work was to carry out a detailed investigation of the high temperature niekeliferous pyrrhotite and tellurie iron mineralisation whieh oeeurs in the subvolcanie intrusions of the Hammers Dal Complex (Pedersen, this report, and in press), and to seareh for other occurrenees with an econornic evaluation in view. The dyke-like intrusions are mainly found in gorges in the south facing slope of the E-W trending Hammers Dal, about 10 km from the west coast of Disko. They are exposed only in the upper 400 m of the Rinks Dal Member. The depth of the intrusions was thus 400-500 m below the palaeosurfaee, marked by the weakly eontaminated basalts and more strongly eontaminated 'andesites' of the Niaqussat Member which are considered to be the extrusive equivalents of the intrusions. The magma seems to have intruded along a joint zone dipping about 70° WSW forming pipes or dyke-like bodies plunging gently NNW.

scholarly journals Border relations between the amphibolite facies Finnefjeld gneiss complex and granulite facies grey gneisses in the Fiskefjord area, southern West Greenland

1988 ◽  
Vol 140 ◽  
pp. 49-54
Author(s):  
M Marker ◽  
A.A Garde
Keyword(s):  
Granulite Facies ◽  
Field Work ◽  
Geological Mapping ◽  
Amphibolite Facies ◽  
The South ◽  
West Greenland ◽  
South Eastern ◽  
Gneiss Complex ◽  
Eastern Boundary ◽  
The 1950S

The authors carried out geological mapping in August 1987 at the south-eastern boundary of the Finnefjeld gneiss complex around 65°N. The field work was supported by the GGU cutter 'J. F. Johnstrup'. Based on reconnaissance mapping in the 1950s Berthelsen (1951, 1957,1962) divided the Archaean gneiss terrain in the southem Sukkertoppen district between Godthåbsfjord and Søndre Isortoq into three major tectonic units: the Nordland, the Finnefjeld and the Alangua complexes. This division was also followed by Noe-Nygaard & Ramberg (1961).

scholarly journals Field work on Precambrian rocks in the Buksefjorden region, southern West Greenland

1977 ◽  
Vol 85 ◽  
pp. 60-64
Author(s):  
B Chadwick ◽  
K Coe ◽  
P.M Compton ◽  
A Nutman
Keyword(s):  
Field Work ◽  
The South ◽  
West Greenland ◽  
Precambrian Rocks ◽  
Base Camp

Four teams took part in field work in the 1976 season, the penultimate in the project started in 1972 to map the 1:100 000 scale Buksefjorden sheet. Chadwick completed mapping Angissorssuaq and surrounding islands; Coe worked between Taserssuatssiat and Alángordlia; Compton mapped between the western part of Taserssuatssiait and Buksefjorden, and Nutman began a detailed study of Amitsoq gneisses and rocks ofthe Akilia association in the Narssaq peninsula and islands to the south and west. As in the first two years of the project, the programme was not run from a GGU base camp, but help from staff at the Itivnera base in Godthåbsfjord is acknowledged. Valuable assistance was also received from officials at Nordafar. We also wish to acknowledge the help given (often under great difficulties) by GGU skipper Flemming Nielsen and his crew and by staff and pilots of Greenlandair Charter AIS.

scholarly journals Field mapping of the early Proterozoic Karrat Group on Svartenhuk Halvø, central West Greenland

1984 ◽  
Vol 120 ◽  
pp. 25-31
Author(s):  
J Grocott ◽  
R Vissers
Keyword(s):  
Field Work ◽  
Early Proterozoic ◽  
Field Mapping ◽  
West Greenland ◽  
Precambrian Rocks

Field work on the Precambrian rocks of Svartenhuk Halvø was continued in 1983 in connection with the production of the 1:100 000 sheet 71 V.l N. The work was complementary to that of 1981 (van den Eeckhout & Grocott, 1982), and attention was focussed on the middle and upper reaches of Kangiussap auvfâ in the east of Svartenhuk Halvø (fig. 10).

Upernavik 98: reconnaissance mineral exploration in North-West Greenland

1999 ◽  
pp. 39-45 ◽  
Author(s):  
Bjørn Thomassen ◽  
Johannes Kyed ◽  
Agnete Steenfelt ◽  
Tapani Tukiainen
Keyword(s):  
Mineral Exploration ◽  
Mining Industry ◽  
Field Work ◽  
Geological Survey ◽  
Original Series ◽  
West Greenland ◽  
North West ◽  
One Year

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., Kyed, J., Steenfelt, A., & Tukiainen, T. (1999). Upernavik 98: reconnaissance mineral exploration in North-West Greenland. Geology of Greenland Survey Bulletin, 183, 39-45. https://doi.org/10.34194/ggub.v183.5203 _______________ The Upernavik 98 project is a one-year project aimed at the acquisition of information on mineral occurrences and potential in North-West Greenland between Upernavik and Kap Seddon, i.e. from 72°30′ to 75°30′N (Fig. 1A). A similar project, Karrat 97, was carried out in 1997 in the Uummannaq region 70°30′–72°30′N (Steenfelt et al. 1998a). Both are joint projects between the Geological Survey of Denmark and Greenland (GEUS) and the Bureau of Minerals and Petroleum (BMP), Government of Greenland, and wholly funded by the latter. The main purpose of the projects is to attract the interest of the mining industry. The field work comprised systematic drainage sampling, reconnaissance mineral exploration and spectroradiometric measurements of rock surfaces.

The Archaean Atâ intrusive complex (Atâ tonalite), north-east Disko Bugt, West Greenland

1999 ◽  
pp. 103-112
Author(s):  
Feiko Kalsbeek ◽  
Lilian Skjernaa
Keyword(s):  
Intrusive Complex ◽  
The South ◽  
Original Series ◽  
Early Proterozoic ◽  
West Greenland ◽  
North East ◽  
The North ◽  
Southern Border ◽  
Area North ◽  
Igneous Layering

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Kalsbeek, F., & Skjernaa, L. (1999). The Archaean Atâ intrusive complex (Atâ tonalite), north-east Disko Bugt, West Greenland. Geology of Greenland Survey Bulletin, 181, 103-112. https://doi.org/10.34194/ggub.v181.5118 _______________ The 2800 Ma Atâ intrusive complex (elsewhere referred to as ‘Atâ granite’ or ‘Atâ tonalite’), which occupies an area of c. 400 km2 in the area north-east of Disko Bugt, was emplaced into grey migmatitic gneisses and supracrustal rocks. At its southern border the Atâ complex is cut by younger granites. The complex is divided by a belt of supracrustal rocks into a western, mainly tonalitic part, and an eastern part consisting mainly of granodiorite and trondhjemite. The ‘eastern complex’ is a classical pluton. It is little deformed in its central part, displaying well-preserved igneous layering and local orbicular textures. Near its intrusive contact with the overlying supracrustal rocks the rocks become foliated, with foliation parallel to the contact. The Atâ intrusive complex has escaped much of the later Archaean and early Proterozoic deformation and metamorphism that characterises the gneisses to the north and to the south; it belongs to the best-preserved Archaean tonalite-trondhjemite-granodiorite intrusions in Greenland.

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