scholarly journals Review of the Survey's activities in 1978

1979 ◽  
Vol 95 ◽  
pp. 5-8
Author(s):  
K Ellitsgaard-Rasmussen
Keyword(s):  
Snow Cover ◽  
Air Force ◽  
Field Work ◽  
Aerial Photographs ◽  
Topographic Maps ◽  
Main Field ◽  
Geodetic Institute ◽  
Geological Maps ◽  
Field Activity ◽  
North Greenland

The main field activity of the Survey in 1978 was a study of the geology of North Greenland (fig. 1). This was the first summer of a three year project which aims at a geological synthesis of the whole region together with the compilation of two 1:500000 geological maps. Significant additions to the geological knowledge of the area included the discovery ol an extensive Proterozoic basalt province, an extension of the known distribution of the late Proterozoic to Silurian strata, and of the late Palaeozoic to Tertiary Mesozoic sequences of the Wandel Sea Basin. The field work has been undertaken in cooperation with the Geodetic Institute, establishing a set of ground central points for the preparation of topographic maps of northern Greenland. These maps will be based on a new set of aerial photographs which were taken during the summer. The Danish Air Force using a Hercules aircraft flew in the group of 32 geologists and surveyors and their equipment to Station Nord. Geological studies and surveying went according to plan, in spite of more snow cover than usual in most of Peary Land.

scholarly journals C14 dating of Survey material carried out in 1976

1977 ◽  
Vol 85 ◽  
pp. 127-129
Author(s):  
A Weidick
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
National Museum ◽  
East Greenland ◽  
Radiocarbon Age ◽  
Carbon 14 ◽  
Geodetic Institute ◽  
Map Series ◽  
North Greenland ◽  
Age Determinations

Twenty-two radiocarbon age determinations of shell samples (18), wood (3) and gyttja (1) from North and East Greenland are summarised below. All the material was collected during GGU field work. The samples have been dated at the Geological Survey of Canada, Ottawa (marked GSC); Isotopes Inc., Westwood, New Jersey, USA (marked I) and at the Carbon-14 Dating Laboratory of the Geological Survey of Denmark and the National Museum, Copenhagen (marked K). The samples in East Greenland are located by coordinates taken from the Danish Geodetic Institute 1:250000 map series; in North Greenland from the U.S.A.F. World AeronauticaI Chart 1: 1000000, 5th edition.

scholarly journals Reconnaissance work in the Triassic of the Wandel Sea Basin, eastern North Greenland

1977 ◽  
Vol 85 ◽  
pp. 11-15
Author(s):  
E Håkansson ◽  
C Heinberg
Keyword(s):  
Air Force ◽  
Field Work ◽  
Regional Mapping ◽  
Structural Detail ◽  
The North ◽  
Single Section ◽  
North Eastern ◽  
Logistic Support ◽  
North Eastern Part ◽  
North Greenland

The North-eastern part is one of the geologically least known areas in Greenland and although late Palaeozoic, Mesozoic and Tertiary strata are known to comprise the Wandel Sea basin, litlIe stratigraphical and structural detail is available (for summaries see Peel et al., 1974; Dawes, 1976). As a forerunner to GGU's forthcoming regional mapping project in northern Greenland, a reconnaissance tour to the Wandel Sea basin was attempted through the courtesy of the Royal Danish Air Force. However, due to partial failure in logistic support the field work was severely restricted and only part of the eastern Peary Land sequence was visited. Here only a single section was measured.

scholarly journals Radiocarbon dating of samples collected during the 1984 expedition to North Greenland

1985 ◽  
Vol 125 ◽  
pp. 5-8
Author(s):  
M Ghisler
Keyword(s):  
Radiocarbon Dating ◽  
East Coast ◽  
Mineral Exploration ◽  
Field Work ◽  
Field Studies ◽  
Petroleum Geology ◽  
Laboratory Studies ◽  
Main Field ◽  
The West ◽  
North Greenland

The Geological Survey of Greenland (GGU) continued the investigation of the geology of Greenland during the year with both field studies in Greenland and laboratory studies in Copenhagen. Field work was carried out between June and September by two main field groups in the northern and southernmost parts of Greenland separated by more than 2000 km. Smaller groups worked in several areas along the west coast and a short reconnaissance was accomplished along the south-east coast. GGU's work encompassed geochemical and geophysical studies, mineral exploration, petroleum geology, environmental investigations, and glaciology. Seventy-nine scientists and technicians participated in the summer's field work. In addition to the GGU parties several groups from other institutions worked in dose collaboration with GGU. The areas of activity in 1984 are indicated on fig. 1.

scholarly journals Microplankton and sedimentological studies in the Nûgssuaq and Disko region, central West Greenland

1976 ◽  
Vol 80 ◽  
pp. 39-42
Author(s):  
J.M Hansen
Keyword(s):  
Natural Science ◽  
Field Work ◽  
Basin Analysis ◽  
Geological Survey ◽  
Main Field ◽  
West Greenland ◽  
Field Activity

In 1975 the Danish Natural Science Foundation (SNF) and the Geological Survey of Greenland (GGU) initiated an investigation of the microplankton (dinoflagelIate cyst) of the Cretaceous and Tertiary sediments in central West Greenland. The purpose of this investigation is the establishment of a dinoflagelIate stratigraphy based on samples from measured sections to assist in a basin analysis. SNF provided the funds for the establishment of a laboratory for palynological preparation and investigation. They also funded a Leitz Orthoplan microscope with a Leica camera for the study of the microplankton, and two of the six Honda ATC 90 motor tricycles that facilitated the field work. The main field activity in 1975 has been outlined by Croxton (this report). As mentioned by Schiener & Henderson (1975), seven weeks field work were carried out in 1974 by the writer and T. Jürgensen. In 1974 ten sections (M1 - M10) totalling 2670 m of sediment were measured and 201 samples were collected. T. Jürgensen also measured a series ofsections (T2 -T14). In 1975 nineteen sections(M11-M29) were measuredand 837 samples were collected (see fig. II for localities).

scholarly journals Mapping in the Umanak district, central West Greenland

1979 ◽  
Vol 95 ◽  
pp. 27-30
Author(s):  
T.C.R Pulvertaft
Keyword(s):  
Aerial Photographs ◽  
Advanced Stage ◽  
West Greenland ◽  
Geodetic Institute ◽  
Geological Maps ◽  
General Geology ◽  
Field Season ◽  
Logistic Support ◽  
The Individual ◽  
Senior Students

Publication of 1:100000 geological maps from central West Greenland has reached a stage when five maps have been issued, and a sixth is in an advanced stage of preparation. However, until the summer of 1978, one of the most readily accessibie areas in this part of Greenland - that around and east of Umanak - had not been mapped in greater detail than required for the production of the 1:500000 sheet Søndre Strømfjord - Nfigssuaq. Consequently it was decided that the writer, together with a group of senior students from the Institute of General Geology, Copenhagen University, should remap the area over a period of three seasons with a view to preparation of the 1:100000 sheet 70 V.2 Nord - Agpat. This work was started in the 1978 field season when in all four geologists, each with an assistant, were in the fieid. The areas in which the individual geologists worked are shown in fig. 9. Mapping was carried out on enlargements of vertical aerial photographs provided by the Geodetic Institute, the 1:50000 topographic sheets being unsuitable for detailed mapping. Logistic support was provided by the GGU cutter N. V. Ussing, with Flemming Nielsen as skipper.

scholarly journals C14 dating of survey material carried out in 1977

1978 ◽  
Vol 90 ◽  
pp. 119-124
Author(s):  
A Weidick
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
East Greenland ◽  
North West ◽  
Radiocarbon Age ◽  
Carbon 14 ◽  
Geodetic Institute ◽  
North East ◽  
North Greenland ◽  
Age Determinations

Fourty-two radiocarbon age determinations of shell samples (27), wood (2) and gyttja (13) from North-West, North, East, and South Greenland are summarised below. All the material was collected during GGU field work in recent years. The samples have been dated by the Geological Survey of Canada, Ottawa (marked GSC), Isotopes Inc., Westwood, New Jersey, USA (marked I) and the Carbon-14 Dating Laboratory of the Geological Survey of Denmark and the National Museum, Copenhagen (marked K). The samples in North-West, South and East Greenland are located by the coordinates from the Danish Geodetic Institute maps; in North Greenland coordinates are from the U.S.A.F. World Aeronautical Chart 1:1000000, 5th edition.

scholarly journals Update of the seamless 1:500 000 scale geological map of Greenland based on recent field work in the Wandel Sea Basin, eastern North Greenland

2018 ◽  
pp. 39-42
Author(s):  
Kristian Svennevig
Keyword(s):  
Basic Research ◽  
Field Work ◽  
The Arctic ◽  
Digital Map ◽  
The Past ◽  
Geological Surveys ◽  
Current State ◽  
Geological Maps ◽  
Geological Map ◽  
North Greenland

Geological maps are core products of national geological surveys and represent the sum of geological knowledge of any given area. However, dedicated and extensive mapping projects in the Arctic are mostly a thing of the past due to difficulty in financing such costly basic research efforts. Today, an overview of the geology of Greenland is portrayed by a seamless digital 1:500 000 scale geological map (Kokfelt et al. 2013; Pedersen et al. 2013), based on printed maps on this scale produced since 1982 by the Geological Survey of Denmark and Greenland (GEUS; see Holst et al. 2013). The digital map now makes it possible to update smaller areas with new, published or otherwise quality-controlled geological data (e.g. Kolb et al. 2016). This ensures that the map reflects the current state of geological knowledge without undertaking extensive new mapping to update individual map sheets, as has previously been the modus operandi. An online version of the map is available from www.greenmin.dk/map. However, procedures are required to ensure that updates are carried out routinely and that the quality and coherence of the updated map is of the Survey’s standards. Results of recent field work in the Wandel Sea Basin (Fig. 1) and in particular the publication of a new geological map sheet Kilen on a scale of 1:100 000 (Svennevig in press) have implications for the geology shown on the above mentioned 1:500 000 scale seamless geological map of Greenland. The post-Devonian part of this map in eastern North Greenland has been updated according to the results of studies published since the publication of the original printed maps (Bengaard & Henriksen 1986; Jepsen 2000). The changes do not call for an update of the 1:2 500 000 scale geological map of Greenland (Henriksen et al. 2009).

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.

Grønlands Geologiske Undersøgelse and Geodætiske Institut North Greenland expeditions, 1978–80

Polar Record ◽  
1980 ◽  
Vol 20 (125) ◽  
pp. 153-156
Author(s):  
A. K. Higgins
Keyword(s):  
Air Force ◽  
Geological Survey ◽  
Geodetic Institute ◽  
Close Cooperation ◽  
Second Year ◽  
Map Series ◽  
North Greenland

The second year of the three-year programme of geological investigations in eastern North Greenland has been successfully completed by the Grønlands Geologiske Undersøgelse (GGU) [Geological Survey of Greenland], in close cooperation, for logistic purposes, with the Geodætiske Institute (GI) [Danish Geodetic Institute] and the Royal Danish Air Force. This programme is the culmination of many years’ planning and the results from it are to be used in the compilation of sheet 8 of the 1:500 000 Greenland geological and Quaternary map series (Watt, 1976), in addition to more detailed maps of specific areas at 1: 100 000.

Classification of vegetation in Cucphuong National Park with the aim of large-scale mapping, Vietnam

1996 ◽  
pp. 64-67 ◽  
Author(s):  
Nguen Nghia Thin ◽  
Nguen Ba Thu ◽  
Tran Van Thuy
Keyword(s):  
National Park ◽  
Large Scale ◽  
Satellite Images ◽  
Field Work ◽  
Aerial Photographs ◽  
Vegetation Map ◽  
Dense Forest ◽  
Broad Leaved Forest ◽  
Leaved Forest

The tropical seasonal rainy evergreen broad-leaved forest vegetation of the Cucphoung National Park has been classified and the distribution of plant communities has been shown on the map using the relations of vegetation to geology, geomorphology and pedology. The method of vegetation mapping includes: 1) the identifying of vegetation types in the remote-sensed materials (aerial photographs and satellite images); 2) field work to compile the interpretation keys and to characterize all the communities of a study area; 3) compilation of the final vegetation map using the combined information. In the classification presented a number of different level vegetation units have been identified: formation classes (3), formation sub-classes (3), formation groups (3), formations (4), subformations (10) and communities (19). Communities have been taken as mapping units. So in the vegetation map of the National Park 19 vegetation categories has been shown altogether, among them 13 are natural primary communities, and 6 are the secondary, anthropogenic ones. The secondary succession goes through 3 main stages: grassland herbaceous xerophytic vegetation, xerophytic scrub, dense forest.

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