scholarly journals Field work in the Frederikshåb area

1966 ◽  
Vol 11 ◽  
pp. 32-35
Author(s):  
S.B Jensen
Keyword(s):  
Field Work ◽  
Geological Mapping ◽  
West Greenland ◽  
Geological Maps ◽  
The Town

The systematic geological mapping of the area in West Greenland between 60°30' and 62°00' N, i.e between the fjord Sermiligârssuk and the town Frederikshåb, was begun by GGU in 1963. The aim is to publish two geological maps In a scale of 1:100 000. The area is the northern continuation of the Ivigtut area which was mapped by GGU in the years 1954-1960. Reconnaissance mapping up to 1960 mainly by A. Berthelsen revealed many features of the geology, and was a help in the practical planning of the field work.

scholarly journals Investigation of the Qaqarssuk carbonatite complex, southern West Greenland

1985 ◽  
Vol 125 ◽  
pp. 34-40
Author(s):  
C Knudsen
Keyword(s):  
Soil Cover ◽  
Field Work ◽  
Soil Samples ◽  
Geological Mapping ◽  
Residual Soil ◽  
Carbonatite Complex ◽  
West Greenland ◽  
Geophysical Mapping

During the summer of 1984 the Qaqarssuk carbonatite complex was visited as a part of the EEC supported project 'Apatite Mineralisations in Carbonatite and Ultramafic Intrusions in Greenland'. The complex is situated 60 km east of Sukkertoppen and was originally found and mapped by Kryolitselskabet Øresund AJS (Vuotovesi, 1974, and Gothenborg et al., 1977). The field work in 1984 was focussed on geological mapping of the complex (on 1: 10 000 orthophoto map), and on geophysical mapping of the thickness of the overburden (described by Kjærgaard & Olsen, this report). Collection of soil samples was carried out in order to evaluate a possibie residual soil cover as a source for phosphorous and niobium. Apatite and REE mineralised rocks were also sampled for beneficiation studies.

scholarly journals Remote geological mapping using 3D photogrammetry: an example from Karrat, West Greenland

2018 ◽  
pp. 63-66 ◽  
Author(s):  
Erik Vest Sørensen ◽  
Pierpaolo Guarnieri
Keyword(s):  
Field Work ◽  
Geological Mapping ◽  
Small Subset ◽  
Digital Cameras ◽  
Digital Photogrammetry ◽  
West Greenland ◽  
Geological Interpretation ◽  
Invaluable Tool ◽  
3D Photogrammetry ◽  
Geological Map

The geology of the Paleoproterozoic Karrat Group in West Greenland (71°–74°50´N) was investigated during the field seasons 2015–2017, using a combination of digital photogrammetry and traditional field work in a collaboration between the Geological Survey of Denmark and Greenland and the Ministry of Minerals Resources of Greenland. The area is characterised by steep alpine terrain with more than 2000 m of relief that in many places is completely inaccessible, which makes field work extremely difficult. Therefore 3D mapping using digital photogrammetry is an invaluable tool in the investigation of the region. Early geological investigations of the area involved the first use of photogrammetry in Greenland (Henderson & Pulvertaft 1987). This contribution serves as an example of the present-day use of photogrammetry in geological interpretation, following the workflow outlined in Sørensen & Dueholm (2018). During the last three years, more than 50 000 stereo images have been collected using handheld, calibrated digital cameras while conducting field work in the area (Rosa et al. 2016, 2017, 2018). The images, which cover large parts of the steep cliff sections in which the geology is superbly exposed, are essential to the ongoing revision of the geological map sheets covering the area. Here we present a small subset of the data from the island of Karrat (Fig. 1), showcasing the potential of 3D geological mapping in Greenland as well as presenting new insights into the geology of the Karrat Group.

scholarly journals Investigations on the Quaternary deposits in the Godthåbsfjord area, southern West Greenland

1975 ◽  
Vol 75 ◽  
pp. 63-65
Author(s):  
A Weidick
Keyword(s):  
Field Work ◽  
Quaternary Deposits ◽  
West Greenland ◽  
The Town

A reconnaissance of the Quaternary deposits around Godthåbsfjord was carried out during the summer with the assistance of Flemming Damslund. The field work represented a northerly continuation of the reconnaissance of 1973 in the Fiskenæsset area (Weidick, 1974) and was made with the purpose of collecting information for tbe Quaternary Map Sheet 1:500 000 Frederikshåbs Isblink - Søndre Strømfjord. The area surveyed extended from Nordlandet and the islands west of the town of Godthåb to the inner branches of Godtbåbsfjord at Kangersuneq (fig. 11).

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 Corundum crystals with blue-red colour zoning near Kangerdluarssuk, Sukkertoppen district, West Greenland

1988 ◽  
Vol 140 ◽  
pp. 46-49
Author(s):  
A.A Garde ◽  
M Marker
Keyword(s):  
Field Work ◽  
Geological Mapping ◽  
West Greenland

Results are presented of field work at a corundum locality near the head of Kangerdluarssuk, east of Maniitsoq/Sukkertoppen, West Greenland. The authors carried out geological mapping and sampling over four days in August 1987 to evaluate the quality of the corundum as a possibIe gemstone.

scholarly journals Sedimentological observations in Cretaceous and Tertiary rocks in the northern part of the West Greenland sedimentary basin

1981 ◽  
Vol 105 ◽  
pp. 26-27
Author(s):  
F Andreasen
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Sedimentary Basin ◽  
Sedimentary Basins ◽  
Field Work ◽  
Depositional Environments ◽  
The West ◽  
West Greenland ◽  
Geological Maps

As part of the programme to produce geological maps at a scale of 1:100000 field work was carried out in the eastem part of the area covered by map sheet 71 V.l N(Svartenhuk Halvø). Reconnaissance work was carried out in parts of the area covered by map sheet 72 V.l S. At a number of localities detailed sedimentological sections were measured at a scale of 1: 100. Emphasis was laid on the registration of primary sedimentary structures and grain-size distribution. A large number of palaeocurrent measurements were carried out in order to describe the depositional environments and to enable an interpretation of the development and geometry of the sedimentary basins to be made.

scholarly journals Early Precambrian geology of the Godthåb area

1969 ◽  
Vol 19 ◽  
pp. 28-30
Author(s):  
V.R McGregor
Keyword(s):  
Geological Mapping ◽  
Early Precambrian ◽  
West Greenland ◽  
Precambrian Geology ◽  
The Town ◽  
Inner Parts

Work on the chronology of plutonic events in the Godthåb area, West Greenland, was continued in 1968. Geological mapping on a scale of 1:20 000 was extended to the islands south of the town of Godthåb and to the peninsula west and south of Kobbefjorden. In addition, short excursions were made to the islands between Godthåb and Færingehavn, to the southern part of the Nordland peninsula and to the inner parts of Godthåbsfjord.

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.

Mantle xenoliths from Tertiary lavas and dykes on Ubekendt Ejland, West Greenland

1998 ◽  
pp. 152-154
Author(s):  
Stefan Bernstein ◽  
C. Kent Brooks
Keyword(s):  
Field Work ◽  
Mantle Xenoliths ◽  
Alkaline Basalt ◽  
Basalt Flow ◽  
Volcanic Province ◽  
East Greenland ◽  
Original Series ◽  
West Greenland ◽  
Ultramafic Xenoliths ◽  
Extensive Collection

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Bernstein, S., & Brooks, C. K. (1998). Mantle xenoliths from Tertiary lavas and dykes on Ubekendt Ejland, West Greenland. Geology of Greenland Survey Bulletin, 180, 152-154. https://doi.org/10.34194/ggub.v180.5099 _______________ Mantle xenoliths were found in Tertiary alkaline (basanitic) lavas on Ubekendt Ejland in West Greenland in the mid 1970s by J.G. Larsen. Microprobe analyses of olivine, pyroxene and spinel in two mantle xenoliths, suggested that the xenoliths on Ubekendt Ejland are highly depleted and have high modal olivine contents, and low modal orthopyroxene and clinopyroxene (Larsen 1982). In this respect the mantle xenoliths from Ubekendt Ejland are very similar to the spinel harzburgites from Wiedemann Fjord, in the Tertiary volcanic province of East Greenland (Brooks & Rucklidge 1973; Bernstein et al. 1998). Larsen (1981) also reported dykes containing mantle nodules and a varied suite of cumulates and megacrysts, one of which has subsequently been dated to 34.1 ± 0.2 Ma (Storey et al. 1998) The basalt flow that carries the xenoliths is from what is defined as the Erqua Formation which occurs at the top of the lava succession in western Ubekendt Ejland (Fig. 1; Drever & Game 1948; Larsen 1977a, b). The basalts have not been dated, but are younger than 52.5 Ma, which is the date obtained for the underlying formation (Storey et al. 1998). During July 1997, we spent three weeks collecting xenoliths and prospecting for xenolith-bearing dykes in the Uummannaq district of central West Greenland. The field work resulted in an extensive collection of xenoliths from an alkaline basalt flow described by Larsen (1977a, b), as well as the discovery of a dyke carrying a large number of ultramafic xenoliths of various origins. 

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.

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