bluuebunny/crossref_metadata_2025 huggingface dataset:
The Grusgraven locality: border relationships between Precambrian supracrustal rocks and orthogneisses, Kangikajik, South-East Greenland
Authors: Dawes P.R
Published: June 2021

Kangikajik peninsula in the northern part of the Ammassalik region is composed of a high grade complex of Precambrian gneisses and supracrustal rocks. Amphibolites occur both in the gneisses and supracrustal rocks which are folded together and generally interleaved. At Grusgraven, a corrie on the south coast, a particularly well-exposed outcrop reveals border relationships between gneiss and supracrustal rocks. These relationships, as well as the internal characters of the rocks, favour a model where the regional gneisses present a basement to a cover sequence composed of metasediments and amphibolites. Whether this involves an Archaean – early Proterozoic association, as isotopically dated elsewhere in the region, is unknown.
The Niflheim thrust: a tectonic contact between granulite and amphibolite facies gneisses, South-East Greenland
Authors: Escher J.C , Hall R.P
Published: June 2021

The Niflheim thrust forms part of the northern boundary zone of the Proterozoic mobile belt of the Ammassalik region and defines the southernmost extent of granulite facies gneisses north-west of Sermilik. The thrust sharply separates grey amphibolite facies gneisses (footwall) from a thick and extensive unit of brown granulite facies gneisses, suggesting considerable lateral as well as vertical transport of the brown gneisses. Above the contact, the brown gneisses have only been weakly affected by deformation, whilst below the contact intensely folded and sheared grey gneisses indicate strong deformation of the upper part of the footwall sequence during thrusting. Asymmetry of folds below the contact and the E–W trending, gently north dipping thrust contact indicate a sinistral transpressional sense of movement with an up-to-the-south main component of transport. Three undeformed, discordant basic Proterozoic dykes in the grey gneisses of the footwall are truncated by the thrust and the thrust plane has been gently folded during a late stage of the regional Proterozoic deformation. Contrasts between high-grade mineralogy of Proterozoic dykes in the northern part of the Ammassalik region and lower grade, high crustal-level dykes of the grey gneiss terrain in the south are related to the regional thrusting from the north.
Re-evaluation of the geology of the southern West Greenland shelf - Project VEST SOKKEL
Authors: Chalmers J.A
Published: June 2021

From 1970 to 1977 approximately 40000 km of multichannel seismic data were acquired between latitudes 63°N and 68°N on the continental shelf of southern West Greenland. In 1976 and 1977 five wells were drilled to explore for hydrocarbons, but all of them were dry. All exploration licences were relinquished by 1979.
Activities within the field of mineral resources
Authors: Schønwandt H.K
Published: June 2021

Increasing expectation is being placed on the successful exploitation of Greenland's mineral resources. The Geological Survey of Greenland (GGU) responds to this challenge by carrying out work programmes to collect the necessary geological information to meet the basic needs of the mineral industry. In this way GGU is able to advise the Mineral Resources Administration for Greenland on affairs concerning mineral concessions in Greenland.
Continued glaciological investigations with respect to hydropower and ice-climate relationships, at Pâkitsoq, Jakobshavn, West Greenland
Authors: Thomsen H.H , Olesen O.B
Published: June 2021

Hot-water drilling and mass-balance measurements were carried out on the Inland Ice at Pakitsoq north-east of Jakobshavn. Observations of water level fluctuations in the drill holes indicate a high subglacial water pressure close to the ice overburden pressure. Mapping the occurrence of Wisconsinan ice along the ice margin, by sampling of surface ice, was continued and observations were made around an unexpected tapping of an ice dammed lake.
Effects of glaciers on annual runoff east of Nuuk/Godthåb, West Greenland
Authors: Braithwaite R.J
Published: June 2021

The Kangerluarsunnguaq basin east of Nuuk/Godthåb has only a slight glacier cover while glaciers contribute about 80 per cent of the total runoff from Isortuarsuup Tasia. The two basins have similar seasonal variations of runoff and very different year-to-year variation. For example, annual runoff from Kangerluarsunnguaq closely follows annual precipitation variations in Nuuk, confirming that the basin is essentially a precipitation basin. By contrast annual runoff from Isortuarsuup Tasia is in anti-phase to precipitation with a lower amplitude. This is an example of the 'glacier smoothing' effect whereby ablation variations tend to offset precipitation variations. However, runoff from Isortuarsuup Tasia is also influenced by ice-dammed lakes which absorb water for several years and then drain suddenly.
Gold and platinum group metal mineralisation in the Skaergaard intrusion, southern East Greenland
Authors: Nielsen T.F.D , Schønwandt H.K
Published: June 2021

A stratabound gold and platinum metal mineralisation has been located in the Tertiary Skaergaard intrusion of the Kangerdlugssuaq area 68°N in East Greenland. The mineralisation is located in the upper part of the Middle Zone (MZ) of the layered gabbros and appears continuous over c. 40 km2. The mineralisation is 2–5 m thick with gold concentrations up to 5.6 g/t, Pd up to 3.5 g/t and Pt up to 1.5 g/t. Major and trace element distributions indicate that the gold is concentrated in the less mafic layers in the mineralised horizon. It is also concluded that previously reported TiO2 contents of the gabbros and the TiO2 enrichment in the evolving liquids of the intrusion have been underestimated by a factor of 2–3.
Stratigraphic significance of new fusulinid samples from the Upper Palaeozoic Mallemuk Mountain Group, North Greenland
Authors: Nilsson I , Håkansson E , Madsen L , Pedersen S.A.S , Stemmerik L
Published: June 2021

Dating of new fusulinid samples from the Mallemuk Mountain Group has improved constraints on age control of the regional lithostratigraphic units. Sediments of Late Carboniferous age are reported for the first time in Kronprins Christian Land where also the first recorded Sakmarian fusulinids have been found. The base of the Kim Fjelde Formation in Amdrup Land has been dated as Moscovian; this is slightly older than previous age assignments.
A stratigraphic section through the Silurian turbidite sequence (Peary Land Group)in northern Nyeboe Land, North Greenland
Authors: Larsen P , Escher J.C
Published: June 2021

A stratigraphic section is presented through the 6330 m thick Silurian turbidite sequence of the Peary Land Group at Hand Bugt in northern Nyeboe Land, North Greenland. Thickness, age and sediment characteristics of the Merqujoq, Lauge Koch Land, Wulff Land and Nyeboe Land Formations, the Castle Ø Member of Nordkronen Formation and the Chester Bjerg Formation are described.
GGU's aktiviteter i 1990
Authors: Ghisler M
Published: June 2021

GGU's aktiviteter i 1990 har været præget af en ny strategi på råstofområdet, som sigter på en mangedobling af private selskabers efterforskningsvirksomhed, med henblik på at råstofudnyttelse
Arne Noe-Nygaard 30/7/1908 – 3/6/1991
Authors: Ellitsgaard-Rasmussen K
Published: June 2021

Arne Noe-Nygaard died on June 3rd 1991, almost 81 years old; he had then been active as a geologist for 64 years. From 1942 until his retirement in 1978 Noe Nygaard was attached to the University of Copenhagen, as Director of the Mineralogical Museum (now Geological Museum), 1969–77 as Professor of Mineralogy, 1942–69, and as Professor of Dynamic Geology, 1969–78. Noe-Nygaard's great insight into the multifarious world of geology, combined with his friendly, sincere and extrovert nature, made him many influential contacts.
1990 – a year of change in hydrocarbon-geological activities at the Geological Survey of Greenland
Authors: Pulvertaft T.C.R
Published: June 2021

The background for the Geological Survey of Greenland's (GGU's) hydrocarbon-geological activities was briefly outlined in the Report of Activities for 1989 (Stemmerik et al., 1990a). In that report it was intimated that a shift of emphasis in hydrocarbon-geological activities was under way, not only from onshore to offshore but also from East to West Greenland (Fig. 1). 1990 saw this shift take more concrete form. Thus field work in East Greenland was limited to minor projects that focus on diagenesis and reservoir properties of siliciclastic sediments. All other projects onshore East Greenland have reached or are entering into final report stage
Evaluation of the hydrocarbon potential onshore North-East Greenland (72°-75°N)
Authors: Stemmerik L , Christiansen F.G , Piasecki S
Published: June 2021

In 1986 the Geological Survey of Greenland (GGU) initiated a major field and laboratory programme in the onshore areas of North-East Greenland in order to evaluate the petroleum potential and provide basic petroleum geological information for future exploration in the region (Fig. 1).
Hydraulics and hydrology on the Inland Ice
Authors: Thomsen H.H , Olesen O.B
Published: June 2021

Glacier hydrological studies are carried out on the Greenland Inland lce by the Geological Survey of Greenland (GGU) to assess the viability of possible hydro-electric power stations (Thomsen, 1986) in which surface meltwater from the Inland lee margin is by far the most important source of water. Some of this water drains on the surface to the ice margin, but most of it disappears down into the ice through crevasses and moulins. Special emphasis is made on mapping the drainage of water in and under the ice to delineate drainage basins on the Inland Ice.
GGU's mineral resource activities and their role for the mineral industry
Authors: Schønwandt H.K
Published: June 2021

Increasing numbers of exploration companies are visiting the Geological Survey of Greenland's (GGU) headquarters in Copenhagen. A main reason for this was the announcement on 10th January 1991 by the Mineral Resources Administration for Greenland of a new policy to encourage exploration and exploitation of mineral resources in Greenland. Subsequently, new legislation replacing the previous mining law, was passed in June 1991. Some of the questions asked by visitors concern the relationship between the work areas of the industry and the role of the Survey. These questions focus on two of GGU's key functions: (1) the obligation to act as a data bank by collecting and compiling all types of geodata about Greenland; and (2) the active assessment of the mineral potential of Greenland by carrying out laboratory and field studies.
Photogrammetric mapping of fluvial channel sand-bodies in the Atane Formation at Paatuut, Nuussuaq, central West Greenland
Authors: Olsen T
Published: June 2021

Upper Cretaceous deltaic sediments from the Atane Formation are well exposed in a series of steep-sided gullies at Paatuut on the south coast of Nuussuaq. The large exposures within the gullies allowed a large-scale sedimentological investigation of delta stratigraphy, sand-body geometry and fluvial style of the distributary channels. Multi-model photogrammetry was applied in several ways. Photogrammetric mapping of good exposures within the area produced accurate vertical sections up to 2 km long and 0.5 km high. A bed to bed stratigraphy of the delta cycles was established and the sand-bodies within each cycle correlated. The horizontal extent of the sand-bodies was subsequently mapped photogrammetrically using the already orientated stereomodels. This mapping allowed a three-dimensional interpretation of the sand-body geometry. Cross-sections of the sand-bodies and the sand-body geometry formed the basis for the interpretation of the fluvial style of the distributary channels. Using the three-dimensional photogrammetric data the width/thickness ratio, the sinuosity and the shape of sand-bodies as well as of palaeochannels are described. These data are useful when modelling the reservoir geometry in deltaic hydrocarbon fields.
Close-range geological photogrammetry studies: field and laboratory procedures with examples from prograde granulite facies orthogneisses, Kerala, South India
Authors: Garde A.A
Published: June 2021

Precambrian orthogneisses exposed in quarries in the Palghat Gap, KeraIa, South India, were photographed for use in geological photogrammetry studies with a 35 mm (small frame) hand-held camera. Local ground control was provided by simple means: hand level, geological compass and 2 m rule. The practical procedure of photography and acquisition of ground control data is described. The stereoscopic photographs, which show complicated field relations in gneisses with prograde, transitional amphibolite to granulite metamorphic facies relations, were studied using multi-model photogrammetry (see Dueholm, 1992) and an analytical plotter. The estimated standard deviations in the stereo models of scale, azimuth and levelling were ± 2%, 2° and 5°, respectively, but the precision was very good (Iess than 1 cm). Outcrop maps were drawn with an on-line plotter at scales varying from 1:25 to 1:200 with contour intervals between 5 and 100 cm. The plot data were transferred, edited on a Macintosh computer and made ready for publication with a vector-based graphics application.
Greenland mineral resource information to industry: increased scope in 1992
Authors: Dawes P.R , Schønwandt H.K , Thomassen B
Published: June 2021

The year 1992 has seen an expansion in the scope of the Geological Survey of Greenland's (GGU) information service to the mining industry. In the preceding few years this part of GGU's work has been improved by a number of facilities, ranging from the establishment in Copenhagen of a Mineralisation Data Bank and Core Library to a new publication policy aimed at streamlining the processing time and availability of in-house geological data, as well as ensuring improved public access to released company data stemming from concessionary exploration work in Greenland (see Ghisler 1990, 1992; Schønwandt, 1991). A more recent venture has been the introduction of a newsletter – reported on elsewhere in this report (Dawes & Thomsen).
Evaluation of hydropower potential for possible future industrial use, Nuuk area, West Greenland
Authors: Thomsen H.H , Braithwaite R.J , Weidick A , Olesen O.B
Published: June 2021

The potential of Greenland hydropower came into focus folIowing the energy crisis in 1973 and the subsequent demand for exploitation of Greenland's own energy resources. Investigations have been made since the mid-1970s on the feasibility of hydropower in Greenland. At first, emphasis was put upon large, or regional, basins that could supply new energy-intensive industries (GTO, 1975). During the 1980s, the emphasis changed to the so-called 'town basins' where hydropower would be developed to supplement the existing energy in selected Greenland towns. The first hydropower plant is under construction at the Kangerluarsunnguaq/Buksefjorden basin south-east of Nuuk, the capital of Greenland, to supply Nuuk with energy (Fig. 1). This hydropower plant is planned to come into operation in autumn 1993.
Palaeo-environmental studies on the Greenland ice sheet margin
Authors: Reeh N , Thomsen H.H , Bøggild C.E
Published: June 2021

Oxygen 18 isotope studies (δ18O) of ice from the large ice sheets of the Polar regions have given rich information about climate and environmental changes during the past c. 150 000 years (150 ka), and probably much longer. This has been demonstrated by results from the deep ice-core drilling programmes on the central part of the Greenland Inland Ice (e.g. Dansgaard et al., 1982; Johnsen et al., 1992) and Antarctica (Lorius et al., 1985; Kouzel et al., 1987). However, the old ice found at depth in the central regions of the ice sheets can also be sampled and studied at the surface of the ice sheet margins, where ice of different ages is found in a sequence with the oldest ice nearest to the ice edge (Loirus & Merlivat, 1977; Reeh et al., 1987, 1991). Oxygen isotope climate research of this kind was undertaken in 1985 and 1988 at Paakitsoq near Ilulissat/Jakobshavn, West Greenland. These studies were continued and elaborated in 1992.
GREENMIN - Database system for the registration of Greenland mineral occurrences
Authors: Lind M , Tukiainen T , Thomassen B
Published: June 2021

Systematic registration of economic mineral occurrences in Greenland is one of the important tasks of the Geological Survey of Greenland (GGU). GREENMIN (Greenland Mineralisation Data Bank) is the GGU database used for storing these data. The aim is to provide a broad range of exploration information in a systematic and accessible form for use by industry and for GGU's own resource evaluation programmes (e.g. Schønwandt, 1990). Planning and design were initiated in 1987 and systematic data registration started in July 1989. Prior to the initiation of GREENMIN. GGU prepared mineral inventory compilations (including graphic presentations) mainly for internal use and for advisory tasks with the Mineral Resources Administration for Greenland.
Search for meteoritic components in the 3800 million years old Isua supracrustal belt, West Greenland
Authors: Appel P.W.U , Chaussidon M
Published: June 2021

The Isua supracrustal rocks of West Greenland have been in international focus ever since their earliest Archaean age was demonstrated in the early 1970s. For years they were highlighted as the Earth's oldest rocks. Although the 'oldest rocks' tag has now passed elsewhere, the well preserved Isua supracrustal sequence still attracts research projects directed towards understanding the Earth's history. This note refers to one such project, carried out by the Geological Survey of Greenland in collaboration with Centre de Recherches Petrographiques et Geochimiques, Nancy, France, concerning the recognition of cosmic material in the Isua rocks. Field work in 1993 concentrated on detailed sampling of a chert sequence.
Sequence stratigraphic studies in the Jameson Land basin, East Greenland
Authors: Piasecki S , Surlyk F , Dalhoff F , Hansen C.F , Koppelhus E.B , Noe-Nygaard N , Stemmerik L
Published: June 2021

A three-year research programme in Jameson Land was initiated in 1993 as part of ongoing studies of the post Caledonian sedimentary basins in East Greenland. The project is supported by the Danish Ministry of Energy and is carried out as a collaboration between the Geological Survey of Greenland (GGU) and Geological Institute, University of Copenhagen. The purpose of the project is to examine the relationships between fluctuations in relative sea-Ievel and the distribution of source- and reservoir rocks in the Upper Permian and Jurassic sedimentary succession in Jameson Land. The aim is to provide a framework for prediction of the hydrocarbon potential offshore East Greenland.
Publications of the Geological Survey of Greenland 1993
Authors: Editorial Team
Published: June 2021

No abstract available.
Crustal structure in West and South Greenland reflected by regional distribution patterns of calcium and potassium in stream sediments
Authors: Steenfelt A
Published: June 2021

The sampling of stream sediment for reconnaissance geochemical mapping has been completed for a large contiguous area from Uummannaq to Kap Farvel in West Greenland and the compilation of analyticaI data has commenced. Distribution patterns for the first two maps produced, those of calcium and potassium, outline provinces which are related to crustal features. The geochemical provinces can be interpreted to reflect differences in the depth of the exposed crustal segments. Geochemical boundaries occurring in geologically poorly known regions may be indicative of contacts between crustal blocks which have not previously been recognised. In the appendix the quality of the analytical data used in the compilation of the geochemical maps is documented, and the procedure of calibration between data sets is presented.
A minimum age of 2944 ± 7 Ma for the Tartoq Group, South-West Greenland
Authors: Nutman A.P , Kalsbeek F
Published: June 2021

SHRIMP zircon U-Pb data for tonalite intruding greenschist of the Tartoq (group have yielded an age of 2944 ± 7 Ma. This date is interpreted as giving the time of igneous crystallisation of the tonolite and provides a minimum age for deposition of the Tartoq Group.
Structure of the Storstrømmen shear zone, eastern Hertugen af Orléans Land, North-East Greenland
Authors: Strachan R.A , Tribe I.R
Published: June 2021

The Storstrømmen shear zone is a NNE-trending belt of steep, heterogeneously deformed gneisses and mylonites, at least 8 km wide, which transects the basement gneiss complexes of the Caledonian fold belt between Dronning Louise Land and Hertugen af Orleans Land. Shear criteria indicate a consistent sinistral sense of displacement parallel to a gently-plunging L-S fabric. Mineral assemblages and fabrics within the mylonites indicate that mylonitisation was initiated under low amphibolite facies conditions and continued within the greenschist facies. The shear zone is reworked by late, steep brittle faults which are associated with cataclasis and local metamorphic retrogression.
The Germania Land deformation zone and related structures, North-East Greenland
Authors: Hull J.M , Gilotti J.A
Published: June 2021

The Germania Land deformation zone in North-East Greenland consists of two subparallel, NW-striking strands of mylonites and cataclasites. The quasiplastic mylonites formed under low grade (biotite zone) conditions following high grade Caledonian metamorphism. Displacements on the Germania Land deformation zone and parallel zones at Danmarkshavn were predominantly dextral strike slip. Along with the similar, but sinistral, Storstrømmen shear zone, these zones record a late Caledonian phase of orogen-parallel movement. The Germania Land deformation zone is also the locus of Carboniferous normal faulting and basin development.
Reconnaissance for mineral occurrences in North-East Greenland (76°–78°N)
Authors: Jensen S.M , Stendal H
Published: June 2021

Reconnaissance for indications of potentially economic mineralisation in the Caledonian fold belt of North-East Greenland has shown that stream sediment geochemical anomalies and mineral occurrences are related to Lower-Middle Proterozoic and Caledonian skarns, Caledonian shear and thrust zones, and breccias in post-Jurassic normal faults. None of the mineral showings are of economic significance. Mineralised rock samples, stream sediment silt samples and panned stream sediment heavy mineral concentrates generally have low contents of metals and incompatible elements, and only few areas stand out as being geochronically anomalous. On the basis of the present knowledge of the geology of the region the mineral potential is considered low.
New perspectives for Greenland geological research
Authors: Ghisler M
Published: June 2021

No abstract available.
Eastern North Greenland 1994, the 1:500 000 mapping project
Authors: Henriksen N
Published: June 2021

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.
A newly detected ablation phenomena in Dronning Maud Land, Antarctica
Authors: Bøggild C.E , Winther J.-G
Published: June 2021

From November 1993 to February 1994 members of the Geological Survey of Greenland (GGU) participated in a Nordic research effort in Antarctica. The Nordic Antarctic Research Programme (NARP) involves Norway, Sweden and Finland, which are all Antarctic Treaty Consultative Partners; Denmark as an observer has participated only since 1992 (Thomsen, 1994; Boggild et al., 1995). The member countries of NARP have traditionally carried out research in Dronning Maud Land. This region of Antarctica has recently gained new research interest, including survey for a joint European deep drilling programme planned for 1995/96. Future Norwegian climate studies on blue ice will therefore be closely related to the joint European deep drilling programme.
Field mapping and geophysical work in the Scoresby Sund region, East Greenland
Authors: Henriksen N
Published: June 2021

The fourth season of the five-year mapping programme in the Scoresby Sund region was carried out in July and August. A tent base camp was established at the head of Hurry Inlet and served as operation centre for 3 helicopters. The Norwegian sealer "Brandal", and a small cutter provided transport in the fjords. The expedition members numbered 44, comprising 16 geological two-man parties and supporting personnel. Five parties mapped in the crystalline complex of Liverpool Land and one party the Caledonian supracrustal and igneous rocks on Canning Land. Mapping of the post-Caledanian sediments in Jameson Land and southern Scoresby Land was undertaken by six parties (see Birkelund and Perch-Nielsen, this repart). Two parties mapped the eastern part of the Tertiary basalt area south af Scoresby Sund and one undertook Quaternary investigations in the central and eastern part of the Scoresby Sund region. A geophysical party carried out a terrestrial magnetometer investigation across central Jameson Land and a shipborne investigation in Scoresby Sund and Hall Bredning.
Field mapping of Palaeozoic, Mesozoic and Tertiary sediments in the Scoresby Sund region, East Greenland
Authors: Birkelund T , Perch-Nielsen K
Published: June 2021

An eight-week. field season concluded the four-year mapping project on the Phanerozoic sediments of the Scoresby Sund region. Six teams worked in Scoresby Land, Jameson Land, Liverpool Land and the Kap Brewster area (see Henriksen, this report). In addition to the authors the following took part in the 1971 mapping: R. G. Bromley, U. Asgard, F. Surlyk (Univ. of Copenhagen), M. Aellen (Eidg. Techn. Hochschule, Zurich), J. H. Callomon (Univ. of London) and K. Birkenmajer (Polish Acad. ScL, Krakow).
Review of the Survey's activities in 1974
Authors: Ellitsgaard-Rasmussen K
Published: June 2021

The Geological Survey of Greenland (GGU) continued activities during 1974 in accordance with its role as the official government department of the Ministry for Greenland responsibie for all practicai and scientific aspects of geological investigation. A total of 121 people travelled to Greenland in connection with a variety of geological, geophysical, glaciological and hydrogeological projects in 12 areas (fig. 2). Interest in the mineral and hydrocarbon potential of Greenland gained new impetus during 1974 as a result of the general energy crisis. GGU has continued to advise the Ministry on marters concerning concession rights for exploration and extraction of mineral and hydrocarbon resources and, together with the geological institutes of the University of Copenhagen, supported the initiative taken by the Danish Natural Science Research Foundation (Statens Naturvidenskabelige Forskningsråd) with respect to new investigations in Greenland related to economic potential. Interest in the hydrocarbon potential of the West Greenland shelf culminated during 1974 with the Ministry of Greenland inviting applications for concessions in three areas. By the closing date 22 formal applications were received. Details concerning the allocation of concession areas were announced in April 1975. Recent developments in this field in which GGU has advised the Ministry are summarised by Henderson (this report).
Revision of Ordovician-Silurian gastropods from North Greenland
Authors: Peel J.S
Published: June 2021

Ordovician-Silurian gastropods from western North Greenland collected by the British Arctic Expedition (1874-1876) and described by R. Etheridge (1878) are reviewed. Offleyotrochus n. gen. is proposed, with type species O. naresi (Etheridge, 1878) from the Silurian of Orney Ø, and assigned to the family Euomphalidae.
Collection of stream sediments for a reconnaissance geochemical survey from the Peary Land region, North Greenland
Authors: Henriksen N
Published: June 2021

The regional geochemical reconnaissance survey initiated in 1978 (Ghisler et al. 1979) was continued with the collection of stream sediments, as an integral part of the systematic geological mapping programme. The purpose of this programme is to provide information for an evaluation of the mineral potential and to obtain general geochemical data.
Geochemical and ore microscopic investigations on drainage sands from the Peary Land region, North Greenland
Authors: Ghisler M , Stendal H
Published: June 2021

This study is part of a regional geochemical survey based on stream sediment samples collected in the summers af 1978 (fig. 55) and 1979 (cf. Henriksen, this report). The purpose of the present work is a first attempt to delineate areas or geological units, which may contain mineral deposits.
Preliminary results of rock- and palaeomagnetic field work in Peary Land, North Greenland
Authors: Abrahamsen N , Marcussen C
Published: June 2021

This paper reports on the palaeomagnetic field work carried out in the Peary Land region in 1979 (fig. 60) and presents some preliminary results of the laboratory investigations. Previous work relating to the geomagnetic field in North Greenland is very limited, and no palaeomagnetic and rock-magnetic data from Peary Land have hitherto been published.
Palynology of the Middle Jurassic Lower Graben Sand Formation of the U-1 well, Danish Central Trough
Authors: Hoelstad Torsten
Published: June 2021

Twentyone sidewall core samples from the lower 56 metres of the Lower Graben Sand Formation in the U-1 well are described with respect to their kerogen content and microflora in order to gain a better understanding of the depositional environment and the age relations. Based on e.g. the inconsistent dinoflagellate cyst occurrences, marginal marine conditions are concluded. The dinoflagellate cysts Pareodinia prolongata, Acanthaulax senta, Scriniodinium crystallinum, Energlynia acollaris, Wanaea thysanota and Hystrichogonyaulax cladophora and the recovered palynomorph assemblage in general permit an age determination as follows: 21 m Callovian undifferentiated, 7.9 m latest Middle Callovian - earliest Late Callovian, 6.1 m latest Late Callovian and 21 m latest Late Callovian? - earliest Early Oxfordian.
Lower Cretaceous dinoflagellate biostratigraphy in the Danish Central Trough
Authors: Heilmann-Clausen Claus , Birkelund Tove
Published: June 2021

This study deals with Lower Cretaceous biostratigraphy based on dinoflagellates in the Central Trough (Danish North Sea sector). The stratigraphical distribution in Northwestern Europe of the species used in the analysis is evaluated on the basis of the literature, and a dinoflagellate range chart for the Lower Cretaceous of Northwestern Europe is presented. Two wells, Adda-1 and 1-1, containing a complete marine Lower Cretaceous sequence, are biostratigraphically analysed, primarily on the basis of ditch cutting samples. All six Lower Cretaceous stages are identified and their probable positions in the wells are indicated. Additional sections which cover minor parts of the Lower Cretaceous are analysed in the wells M-8, V-1, E-1 and Adda-2 (mainly based on cores and sidewall cores). The ammonite Simbirskites (Craspedodiscus) cf. gottschei, indicating the Hauterivian gottschei Zone, is described from the Adda-2 well. The lithostratigraphical and seismic stratigraphical units of the Central Trough are dated within the framework of dinoflagellate and ammonite stratigraphy. The dinoflagellate species are systematically documented in photographic plates with remarks concerning their identification where necessary. udy deals with Lower Cretaceous biostratigraphy based on dinoflagellates in the Central Trough (Danish North Sea sector). The stratigraphical distribution in Northwestern Europe of the species used in the analysis is evaluated on the basis of the literature, and a dinoflagellate range chart for the Lower Cretaceous of Northwestern Europe is presented. Two wells, Adda-1 and 1-1, containing a complete marine Lower Cretaceous sequence, are biostratigraphically analysed, primarily on the basis of ditch cutting samples. All six Lower Cretaceous stages are identified and their probable positions in the wells are indicated. Additional sections which cover minor parts of the Lower Cretaceous are analysed in the wells M-8, V-1, E-1 and Adda-2 (mainly based on cores and sidewall cores). The ammonite Simbirskites ( Craspedodiscus) cf. gottschei, indicating the Hauterivian gottschei Zone, is described from the Adda-2 well. The lithostratigraphical and seismic stratigraphical units of the Central Trough are dated within the framework of dinoflagellate and ammonite stratigraphy. The dinoflagellate species are systematically documented in photographic plates with remarks concerning their identification where necessary.
Biostratigraphy of the Jurassic strata in the Dutch Central North Sea Graben
Authors: Herngreen G.F.W , Lissenberg Th , White L.J
Published: June 2021

This contribution presents an extended abstract intended for the proceedings of the symposium: The Jurassic in the southern Central Graben, Hørsholm (Denmark) June 15-16, 1989. The full text entitled "Dinoflagellate, sporomorph, and micropaleontological zonation of Callovian to Ryazanian strata in the Central North Sea Graben, The Netherlands" has been published in the proceedings of the 2nd International Symposium on Jurassic Stratigraphy, Lisbon 1989, p. 745-762.
Formation temperatures
Authors: Jensen Peter Klint
Published: June 2021

Borehole temperatures have been studied to evaluate the natural temperature field of the geological formations (fig. 37). Formation temperature and time are main factors affecting maturation of source rocks and should, therefore, be compared with maturation measurements. Furthermore, temperature gradients through sedimentary sequences provide information about relationships between their heat conductivities, and this can be used to extrapolate temperatures measured in wells to the surrounding rock masses.
Reservoir rocks
Authors: Jacobsen Finn , Lieberking Kirsten , Nygaard Erik
Published: June 2021

The present chapter contains a review of the potential reservoir rocks drilled in the Danish Central Graben. The source data for this descriptive summary originates primarily from wells drilled to explore chalk reservoirs. The main part of possible chalk reservoirs has been evaluated only by using wire line logs, since few cores have been cut and very few tests performed. Therefore, further investigations are necessary to evaluate and describe these possible reservoir rocks properly. In this chapter, each zone in which shows have been recorded, and each porosity zone, is described. This is done with reference to the formations/log-units given earlier in the paper. The characteristics relevant to reservoir evaluation, such as the extension, thickness, depth, porosity, and permeability, are described. The characterizing terms (good, fair, etc.) used for reservoir parameters in sandstone reservoirs cannot be applied automatically to chalk reservoirs. The descriptions are accompanied by maps showing the known occurrences.
Bibliography of Moraine Deposits in Denmark 1875-1974
Authors: Marcussen Ib
Published: June 2021

The literature on Quaternary glacigene deposits in Denmark is extensive, and it may easily involve a great deal of work to unearth the relevant material on a smaller region of Denmark or on a specific subject. It is therefore my hope that this bibliography will prove helpful to students in finding this type of literature and that it may serve as a guide to students interested in the history/ development of geology, helping them to understand the background for our present interpretation of the genesis and extension of the Quaternary glacial deposits in this country. The bibliography was originally planned as part of a Nordic project. Thus the subject index was prepared in cooperation with colleagues from the other Nordic countries. Unfortunately, so many practical difficulties arose that the joint publication was abandoned. I wish to take this opportunity of thanking my colleagues for an inspiring collaboration, which due to external reasons did not lead to the result hoped for. Thanks to Jon Eirfksson (Iceland), Sylvi Haldorsen (Norway), Hans G. Johansson (Sweden) and Marjatta Pcrttunen (Finland). To professor A. Dreimanis (Canada) I express my gratitude for many stimulating discussions concerning the subject index.
LEGAL MECHANISMS AND IMPROVEMENT SOLUTIONS TO ENHANCE THE RIGHT TO ACCESS TO INFORMATION ON ADMINISTRATIVE PROCEDURES
Authors: Huyền Phạm Thị , Thảo Tống Thị Phương
Published: June 2021

Quyền tiếp cận thông tin về thủ tục hành chính là một trong những nội dung quan trọng của quyền tiếp cận thông tin và là một trong những yếu tố tạo nên tính minh bạch, tin cậy cho hoạt động quản lý nhà nước. Tuy nhiên đây là một nội dung khá mới nên cơ chế thực hiện quyền này lại chưa được pháp luật quy định rõ ràng trong một văn bản quy phạm pháp luật duy nhất, trong quá trình thực hiện còn gặp nhiều vướng mắc. Bài viết nghiên cứu về các cơ chế đảm bảo quyền tiếp cận thông tin về thủ tục hành chính theo quy định của pháp luật Việt Nam dựa trên cách tiếp cận quyền con người và các phương pháp nghiên cứu truyền thống, kết hợp so sánh luật học để từ đó đưa ra các giải pháp theo hướng quy định cụ thể trách nhiệm của các cơ quan nhà nước, đồng thời hoàn thiện các quy định pháp luật nhằm nâng cao quyền tiếp cận thông tin về thủ tục hành chính của người dân.
ANALYSIS OF INFLUENCE OF CUTTING PARAMETERS ON SURFACE ROUGHNESS AND TOOL WEAR IN HARD TURNING SINTERED TUNGSTEN CARBIDE USING CBN INSERTS
Authors: Tuấn Nguyễn Quốc , Tuấn Ngô Minh
Published: June 2021

Tiện cứng là một quá trình gia công có tiềm năng thay thế cho quá trình mài do có nhiều ưu điểm như năng suất cắt cao, bề mặt gia công tốt, thân thiện với môi trường. Cacbua vonfram thiêu kết được sử dụng rộng rãi để làm chày và khuôn cho các quá trình gia công biến dạng dẻo kim loại vì độ cứng cao và khả năng chống mài mòn so với thép hợp kim. CBN là vật liệu dụng cụ cắt siêu cứng được sử dụng để gia công các vật liệu khó gia công bằng cắt như cacbua vonfram. Trong nghiên cứu này, ảnh hưởng của các thông số cắt bao gồm vận tốc cắt, lượng chạy dao và chiều sâu cắt đến lượng mòn mặt sau và độ nhám bề mặt được phân tích bằng cách sử dụng mô hình thí nghiệm 2k với một số điểm thí nghiệm ở tâm. Kết quả nghiên cứu cho thấy lượng chạy dao là thông số có ý nghĩa nhất ảnh hưởng đến độ nhám bề mặt trong quá trình gia công và vận tốc cắt ảnh hưởng mạnh đến lượng mòn mặt sau của dao trong quá trình tiện cứng cacbua vonfram thiêu kết sử dụng mảnh CBN. Kết quả phân tích ANOVA đối với độ nhám bề mặt và lượng mòn mặt sau cho thấy cần phải sử dụng mô hình đường cong để mô tả ảnh hưởng của các thông số cắt đến độ nhám bề mặt và lượng mòn mặt sau trong quá trình gia công này.
A COMPARATIVE STUDY OF PTDF BASED-METHODS TO DETERMINE TRANSMISSION USAGE ALLOCATION FOR BILATERAL TRANSACTIONS IN POWER MARKETS
Authors: Văn Phạm Năng
Published: June 2021

Ngành điện đã và đang tái cấu trúc với mục đích tạo ra sự cạnh tranh giữa những người tham gia thị trường điện. Sự tái cấu trúc này dẫn đến những khó khăn đáng kể cho các đơn vị vận hành hệ thống điện. Một trong những khó khăn này là các đơn vị vận hành hệ thống điện cần cung cấp cho đơn vị tham gia thị trường quyền sử dụng lưới điện truyền tải một cách công bằng. Trong nghiên cứu này, phân bố công suất trên lưới điện truyền tải của các giao dịch song phương được phân tích và so sánh sử dụng hệ số phân bố truyền tải công suất (PTDF). Hệ số phân bố truyền tải công suất được phân loại thành DCPTDF và ACPTDF. Kết quả tính toán từ cả hai tiếp cận này sử dụng các hệ thống điện 3 nút và 6 nút Wood & Wollenberg được phân tích và so sánh. Sự so sánh cho thấy phân bổ công suất trên lưới truyền tải của các giao dịch song phương khi áp dụng hệ số ACPTDF chính xác hơn nhưng phức tạp hơn so với sử dụng hệ số DCPTDF. Kết quả nghiên cứu trong bài báo này cung cấp sự đánh giá chi tiết để hỗ trợ các đơn vị vận hành hệ thống điện đạt được sự công bằng trong hoạt động thị trường điện.
A MOLECULAR PHYLOGENY OF ALPINIA ROXB. (ZINGIBERACEAE): AN OVERVIEW FOR PHYLOGENY OF VIETNAMESE ALPINIA
Authors: Toàn Lê Chí
Published: June 2021

Chi Riềng Alpinia, thành viên lớn nhất của Zingiberaceae, có mối quan hệ phát sinh loài chưa rõ ràng. Các nghiên cứu hiện tại ở Việt Nam thường chỉ tập trung vào các ghi nhận loài bổ sung và loài mới của Alpinia cho hệ thực vật Việt Nam. Vì vậy, cần có một cái nhìn tổng quan về phát sinh loài của Alpinia ở Việt Nam. Công trình này dựa trên dữ liệu phân tử từ các vùng gen matK và ITS của 149 loài xác nhận rằng Alpinia được ủng hộ là nhóm phát sinh đa ngành với sáu nhánh khác nhau. 25/37 loài Alpinia Việt Nam được đưa vào phân tích phân tử, kết quả chỉ ra rằng Alpinia Việt Nam không phải nhóm đơn phát sinh và chúng nằm tại các nhánh II, IV và V của Alpinia. Hầu hết các loài Alpinia Việt Nam tập trung nằm tại nhánh IV nơi bao gồm các loài từ miền Nam Trung Quốc và Đông Nam Á. Dựa trên các phân tích phân tử, Alpinia Việt Nam có mối quan hệ di truyền chặt chẽ với nhau mặc dù chúng phân bố trên toàn lãnh thổ Việt Nam với các vùng khí hậu khác nhau như cận nhiệt đới và nhiệt đới và khó tìm thấy các đặc điểm hình thái đặc trưng chung của chúng.
IMPACTS OF FEEDBACK POSTED ON GOOGLE CLASSROOM ON STUDENTS’ SPEAKING SKILL
Authors: Quyên Vũ Thị , Hà Nguyễn Dương
Published: June 2021

Nghiên cứu nhằm tìm ra ảnh hưởng của những nhận xét mà giảng viên gửi cho sinh viên trên Google Classroom – một nền tảng miễn phí được tích hợp trên các tài khoản thư điện tử (email) đối với việc nâng cao kỹ năng nói của sinh viên năm hai, tại Trường Ngoại ngữ - Đại học Thái Nguyên. Phương pháp quan sát và khảo sát được tác giả sử dụng để thu thập dữ liệu nghiên cứu. Nghiên cứu chỉ ra rằng những nhận xét của giáo viên giúp sinh viên ý thức sâu sắc ưu điểm và nhược điểm của bản thân trong các bài nói. Trong các nhận xét, giảng viên cũng đề xuất một số biện pháp khắc phục các lỗi sinh viên mắc phải. Kết quả là khả năng nói của sinh viên dần được cải thiện. Nghiên cứu cũng chỉ ra rằng Google Classroom giúp sinh viên tiết kiệm thời gian tìm kiếm nhận xét của giảng viên dành cho bài nói của mình. Giảng viên và giáo viên có thể tham khảo nghiên cứu như một phương pháp hữu ích nhằm quản lý bài tập về nhà của học sinh, sinh viên trong thời đại công nghệ và trong bối cảnh vi-rút Corona còn hoành hành trên toàn cầu.
CHẾ TẠO CÁC NANO BẠC DỊ HƯỚNG BẰNG KÍCH THÍCH TỔ HỢP LED XANH LÁ VÀ LED XANH DƯƠNG CHO ỨNG DỤNG PHÁT HIỆN MELAMIN
Authors: Hòa Vũ Xuân
Published: June 2021

Bài báo này trình bày các nano bạc dị hướng được chế tạo bằng phương pháp quang hóa bằng cách lần lượt kích thích ánh sáng LED xanh lá và LED xanh dương với các thời gian khác nhau lên các mầm nano cầu kích thước nhỏ (~7 nm). Hình thái, kích thước được khảo sát bằng kính hiển vi điện tử quét phát xạ trường (FESEM). Cấu trúc tinh thể, thành phần nguyên tố được đo đạc khảo sát bằng nhiễu xạ tia X (XRD) và phổ tán sắc năng lượng (EDX). Tính chất quang của các sản phẩm nano bạc sau chế tạo được phân tích bởi phương pháp phổ hấp thụ UV-Vis. Các nano bạc dị hướng nhận được là các tấm phẳng dạng tam giác, dạng tam giác cụt, dạng lục giác và dạng hợp diện. Các nano hợp diện được hình thành khi kích thích các nano bạc dạng cầu dưới LED xanh dương (BLED). Các tấm phẳng nano bạc dạng tam giác được hình thành khi các mầm được kích thích bởi LED xanh lá (GLED). Kết quả khảo sát khả năng ứng dụng của các nano bạc trong phát hiện melamin bằng tán xạ Raman tăng cường bề mặt (SERS) cho độ nhạy cao (10-6 M). Từ đây hứa hẹn nhiều nghiên cứu thú vị tiếp theo trong lĩnh vực phân tích, phát hiện các chất độc hại trong an toàn thực phẩm nhờ vào các nano bạc như những cảm biến Raman.
ВПЛИВ ЗУБНИХ ПРОТЕЗІВ НА ГОМЕОСТАЗ ПОРОЖНИНИ РОТА
Authors: Акберлі Лейла Бабір кизи
Published: June 2021

Мета. Вивчення показників гомеостазу і біоценозу порожнини рота у хворих, які користуються зубними протезами для підвищення ефективності профілак-тики можливих ускладнень.Матеріал і методи дослідження. Було обстежено 160 пацієнтів у віці від 49 до 55 років зі знімними зуб-ними протезами, з яких було обрано 20 осіб із запа-ленням тканин протезного ложа для лабораторних досліджень, з них 11 протезувалися вперше – 1 група, 9 пацієнтів з багаторічним стажем носіння подібних конструкцій – 2-а група. Ще 8 осіб склали контрольну групу практично здорових осіб.Результати досліджень. Представлені в цій статті матеріали присвячені вивченню впливу знімних плас-тинкових зубних протезів на порожнину рота. При цьому одним з головних завдань було клініко-лабораторне вивчення запальної реакції у відповідь на розвиток патологічних змін в області протезного ложа і визначення ролі гомеостазу і мікробіоценозу порожнини рота в порушенні термінів адаптації до знімних пластинкових зубних протезів. Було встанов-лено, що більшість протезованих пацієнтів адапту-валися до носіння протеза лише протягом 1,5 місяця. Основний висновок по даній роботі полягає в тому, що на підставі вивчення показників гомеостазу і мік-робіоценозу порожнини рота в порівняльному аспек-ті менш виражені порушення фіксувалися у пацієнтів із запальними змінами в тканинах протезного ложа, що мають багаторічний стаж носіння протезних конструкцій.
Filosofía, unidad del conocimiento y duda metódica en René Descartes
Authors: Matos José Concepción , Ojeda-de-López Juana Cecilia , Jiménez-Barriosnuevo María-del-Carmen , Rodríguez Miryan David
Published: June 2021

Filosofía, unidad del conocimiento y duda metódica en René Descartes
The Linking of the UTCV and the MSMEs in the face of the COVID-19 pandemic and the impact for the improvement of their processes
Authors: Antonio-Vidaña Paula Rosalinda , Muñoz-Palacios Luz Del Carmen , Hernández-Peralta Alejandro De Jesús , Martínez-Navarrete Daniel
Published: June 2021

The objective of this article is an analysis of the speeches given in the face of the difficult link between MSMEs and HEIs, the UTCV case for the development of scientific projects and the completion of theses related to MSMEs, and thereby contribute to the strengthening the business organization in the face of the COVID-19 pandemic that occurred throughout the world and is present in different spaces, business, educational, among others, however, the study is limited in describing the problems given in technological higher education and their interaction with micro-entrepreneurs in the development of academic projects, the measures adopted for the fulfillment of academic and bonding activities, from a perspective on the insertion of information technologies, tools and means of organization as adjustments to educational models and processes. The methodology used is mixed with a correlational descriptive approach, through the use of bibliographic information sources for the realization of theoretical support, likewise the focus group tool was used, considering the teachers who stayed in May-August 2020. The results showed the perception of businessmen and teachers of stays linked to MSMEs, their impact and development in the face of the pandemic. The contribution is achieved once the literature and results obtained from the focus group have been reviewed, which allows establishing the degree of flexibility for the implementation of new processes to MSMEs, which allows an area of opportunity to generate interaction of scientific projects with MSMEs, as well as the forms of interaction given to COVID-19.