bluuebunny/crossref_metadata_2025 huggingface dataset:
A second glimpse of Early Cambrian life: new collections from Sirius Passet, North Greenland
Authors: Peel J.S , Morris S.C , Ineson J.R
Published: June 2021

The German mining term lagerstatten, referring to a rock of any composition containing constituents of economic interest, has been widely applied to occurrences of abundant or unusually well preserved fossils (cf. Seilacher et al., 1985). The Middle Cambrian Burgess Shale of western Canada is perhaps the most famous of all fossil-lagerstatt, with many of the approximately 140 known species preserving exquisite details of the soft anatomy of members of a community of organisms that was fossilised more than 500 million years ago (Whittington, 1985: Conway Morris, 1979, 1986; Gould, 1989). Other well known examples include the Upper Cambrian 'Orsten' of southern Sweden, the Lower Devonian Hunsruck Slate and the Jurassic Solnhofen Limestone of Germany (Stürmer et al.. 1980; Muller, 1985; Barthel et al. 1990; summary in Briggs & Crowther, 1990, pp. 266–297). The term can be applied aptly to the Sirius Passet fauna of central North Greenland, where a wealth of exceptionally preserved fossils (e.g. Fig. 1) from tile Lower Cambrian Buen Formation has been recorded from a small locality in western Peary Land, near the south-western end of the broad valley known as Sirius Passet (Fig. 2). The locality yielding the Sirius
Publications of the Geological Survey of Greenland 1991
Authors: Editorial Team
Published: June 2021

No abstract available.
Jakobshavn Isbræ area during the climatic optimum
Authors: Weidick A
Published: June 2021

The GGU glaciological investigations related to hydropower planning north (Pakitsoq) and south (Tiningnilik) of Jakobshavn Isbræ have, together with finds and dating of marine subfossils, furnished information on the history of the ice margin changes during and since the Holocene climatic optimum. The paper attempts to reconstruct the ice margin conditions and surroundings during the Holocene climatic optimum on the basis of this information.
Tourmalinites in supracrustal rocks in the Bjørnesund area, West Greenland
Authors: Appel P.W.U
Published: June 2021

In the mid-Archaean supracrustal rocks of Bjørnesund south of Fiskenæsset metre wide anthophyllite-rich zones are found hosted in mafic volcanics. These zones, which are locally associated with sulphides, are interpreted as alteration zones from hydrothermal solutions which circulated through the volcano-sedimentary pile; in places they contain thin tourmalinites. The tourmaline composition and geologic setting of the occurrences closely resemble stratabound tourmalinites of submarine hydrothermal origin which elsewhere are associated with metalliferous deposits. It is concluded that the presence of the Bjørnesund tourmalinites associated with anthophyllite zones indicates that hydrothermal processes were once active in the depositional environment where the Bjørnesund supracrustals were formed; in other regions such processes are known to have generated massive sulphide ore bodies.
Interpretation of flat-lying Precambrian structure by geological photogrammetry along a 65 km coastal profile in Nuussuaq, West Greenland
Authors: Garde A.A
Published: June 2021

Photogrammetry employing several unequal models was used in the study of a c. 65 km long coastline of Precambrian basement rocks along Qarajaq Isfjord in northeastern Nuussuaq, central West Greenland. A geological profile was drawn parallel to a steep and inaccessible coastline at a scale of 1:50 000, on the basis of photographs at scale c. 1:175 000 taken with a hand-held camera from a helicopter. Two short profiles along the same coast were drawn at a scale of 1:25 000 from photographs at scale c. 1:40 000. The multi-model photogrammetry provided an accurate, flexible and powerful geological mapping tool in inaccessible terrain, whereby the general flat-Iying structure could be analysed. Broken-up remnants of an extensive anorthosite-gabbro complex could be correlated, and several geological features not recognised in the field were discerned. However the application of multi-model photogrammetry along irregular cliff faces is less suitable in folded rocks with complex three-dimensional structures, than in flat-Iying sequences of undeformed rocks.
GGU's aktiviteter i 1992
Authors: Ghisler M
Published: June 2021

De politiske initiativer med henblik på at opnå en større råstofaktivitet i Grønland har også i 1992 præget GGU's arbejde. I løbet af året har der været et internationalt fremstød både i forbindelse med en markedsføring af Grønland som investeringsområde for mineindustrien og i forbindelse med en olieudbudsrunde offshore Vestgrønland syd for 66°N.
Geochemical mapping and geological reconnaissance in the Nagssugtoqidian mobile belt, West Greenland
Authors: Steenfelt A , Kalsbeek F , Jepsen H.F
Published: June 2021

The Early Proterozoic Nagssugtoqidian mobile belt is geologically poorly known despite its location in the more populated part of West Greenland (Fig. 1). A detailed geological map (1:100 000; Olesen, 1984) is available for the western part of the Nordre Strømfjord area, but the remaining areas have only been mapped at 1:500 000 scale with geological reconnaissance along the coast and aerial photograph interpretation of inland areas (Map sheet 3: Søndre Strømfjord - Nugssuaq; Escher, 1971).
Petroleum-geological activities in 1992: preparation and support for licensing rounds offshore West Greenland
Authors: Christiansen F.G , Marcussen C , Pulvertaft T.C.R
Published: June 2021

On 26 March 1992 tile Danish Minister for Energy formally approved the opening of the first licensing round offshore West Greenland to be held since 1975. At the same time it was announced that this licensing round would be the first of three rounds to be held offshore West Greenland at 2–3 year intervals, the present round covering the area between 62° and 66°N and the future rounds areas to the north. Naturally, compilation and circulation of information directly related to the present licensing area was a high priority activity for the Geological Survey of Greenland (GGU) in the first part of the year. The information package 'Offshore West Greenland – Exploration Information', specially prepared by GGU for the licensing round, includes the folIowing items: reprints or preprints of four papers summarising the geology and known petroleum potential of the region, a short report on ice conditions in the licensing area. a bibliography, and catalogues of all seismic and well log data. In April a special issue of the GHEXIS Newsletter summarising Iicensing terms and explaining work requirements was sent out. and in May presentations were held in Copenhagen, London, Houston and Calgary. In all 29 oil companies and 19 consultancies and providers of technical services attended these presentations, at which the political-administrative framework and licensing terms were presented by the Mineral Resources Administration for Greenland, the geological setting and petroleum potential by GGU, and the logistics of exploration in GreenIand by Nunaoil A/S. In June another issue of the GHEXlS Newsletter was sent out in which the substance of the presentations was summarised, largely for the benefit of companies that had been unable to attend the meetings. Three companies visited GGU for individual presentations.
Ice conditions offshore West Greenland
Authors: Thomsen H.H
Published: June 2021

An offshore West Greenland licensing found was formally approved by the Danish Minister of Energy on 26 March 1992, and announced in industry journals in the following months. To give interested companies an opportunity to familiarise themselves with the political framework, licensing terms, geology of the licensing area and general working conditions in Greenland, presentations were held in Europe and North America (Christiansen et al., this report. In addition GGU prepared a special information package 'Offshore West Greenland – Exploration Information 1992' for the licensing round. One of the enclosures in this package is a brief review of ice conditions offshore West Greenland with particular reference to the licensing area (Thomsen, 1992; Fig. 1). The licensing round failed to attract any applications, but ice conditions offshore West Greenland remain of prime interest to any group planning geophysical or environmental studies in the area. For this reason a summary of the report enclosed in the information package is given here.
Publications of the Geological Survey of Greenland 1992
Authors: Editorial Team
Published: June 2021

No abstract available.
Upper Maastrichtian? – lower Paleocene dinoflagellate cysts and pollen from turbidites in the Itilli region, Nuussuaq, central West Greenland – first dating of the sediments
Authors: Nøhr-Hansen H
Published: June 2021

Dinoflagellate cysts are recorded for the first time from two sections representing the uppermost part of the more than two kilometre thick turbidite succession exposed on the south-east side of the Itilli valley in Nuussuaq, central West Greenland. The cysts were recovered from sections situated immediately below the Tertiary pillow breccia at Ilugissorsuaq and at Qaasersut. The dinoflagellate cysts are rare in these sediments and the diversity appears to be low in both sections. The species Palaeocystodinium cf. P. australinum is rare whereas Phelodinium kozlowskii is very common in the uppermost sample from Ilugissorsuaq. A similar acme of P. kozlowskii has been recovered from the lower Paleocene part of the Kangilia section on the north coast of Nuussuaq. The presence of P. cf. P. australinum and the pollen Wodehousia spinata at Qaasersut indicates the presence of uppermost Maastrichtian to lowermost Paleocene sediments.
Eastern North Greenland 1993-1995 - a new 1:500 000 mapping project
Authors: Henriksen N
Published: June 2021

The Geological Survey of Greenland (GGU) initiated in 1964 a 1:500000 mapping programme to produce a general overview of the onshore geology of all the ice-free areas of Greenland. So far 10 of a total of 14 planned map sheets have been published, and one additional sheet for which field work has been completed is under compilation. Most of Greenland is therefore now covered by map sheets of this series and only three areas remain to be covered: in North-West Greenland (sheet 6), in eastern North Greenland (sheet 9) and in East Greenland (sheet 11). Eastern North Greenland (map sheet no. 9; Fig. 1) is the target of the present project, with planned field work from 1993–1995. The first season (1993) was used for logistical preparation and geological reconnaissance in advance of the more intensive field work in the two following seasons (1994–95).
Blue cancrinite from South-East Greenland
Authors: Jensen A , Nielsen T.F.D
Published: June 2021

Blue cancrinite intergrown with sodalite and albite has been found in nepheline syenite dykes in the Precambrian of South-East Greenland. Cabochons cut of the material show a blue colour with more or less pronounced aventurescence. Electron microprobe analysis and X-ray investigation have been carried out to establish the position in the cancrinite-vishnevite solid solution series. Trace elements have been determined by spectral analysis of the Greenland cancrinite as well as cancrinite from Litchfield Maine, USA and Bancroft. Ontario, Canada.
Basement-cover relationships and regional structure in the Grandjean Fjord - Bessel Fjord region (75°–76°N), North-East Greenland
Authors: Friderichsen J.D , Henriksen N , Strachan R.A
Published: June 2021

Geological mapping and isotopic investigations demonstrate that the Grandjean Fjord – Bessel Fjord region can be divided into three rock groups: (1) a Lower Proterozoic basement gneiss complex; (2) a Middle Proterozoic supracrustal cover (Smallefjord sequence); and (3) Upper Proterozoic metasediments (Eleonore Bay Supergroup). The basement gneiss complex largely comprises c. 2.0–1.7 Ga calc-alkaline granitoid orthogneisses with intercalated migmatitic supracrustal rocks. The complex is deformed by at least two sets of approximately coaxial folds which may be either Proterozoic or Caledonian in age. The Smallefjord sequence is comprised mostly of migmatitic schists and gneisses which underwent high-grade metamorphism during the late Middle Proterozoic. The dominant deformation structures within the Smallefjord sequence are associated with the development of ductile shear zones along the boundaries of all the major tectonostratigraphic units and are thought to be Caledonian in age.
Regional geology and Caledonian structure, Dronning Louise Land, North-East Greenland
Authors: Strachan R.A , Friderichsen J.D , Holdsworth R.E , Jepsen H.F
Published: June 2021

A major N-S trending thrust zone exposed in Dronning Louise Land marks the western limit of intense Caledonian deformation in East Greenland. Foreland basement to the west of the thrust zone is dominated by orthogneisses which are overlain unconformably by two sedimentary sequences (Trekant Series and Zebra Series). The Zebra Series contains Skolithos trace fossils which indicate that it is no older than latest Proterozoic. Metamorphosed correlatives of the Trekant Series and the Zebra Series can be recognised as tectonic slices within the thrust zone, and also as infoIds within the allochthonous gneisses which overlie the thrust zone. The dominant Caledonian structures are thought to have resulted from sinistral transpression, which involved partitioning of regional deformation between sinistral strike-slip movements in the east of the region, and generally NW-directed oblique thrusting and folding further to the west.
Age and origin of Caledonian granites in the Grandjean Fjord - Bessel Fjord region (75°–76°N), North-East Greenland
Authors: Hansen B.T , Henriksen N , Kalsbeek F
Published: June 2021

The Grandjean Fjord – Bessel Fjord region (75°–76°N) contains the northernmost occurrences of Caledonian granites in North-East Greenland. Most of them have been emplaced along the margins of a sequence of late Proterozoic sediments, the Eleonore Bay Supergroup, or occur within middle Proterozoic metasediments of the Smallefjord sequence. Most granites are undeformed, but granite sheets within the Smallefjord sequence may be foliated. Zircon U-Pb dates indicate that they were emplaced about 400 Ma ago. Sm-Nd, Rb-Sr, and major and trace element analyses suggest that the granites are of mixed origin. Components of crustal origin and juvenile mantle-derived material are present, and occur in variable proportions. Under these circumstances precise dating of the rocks is difficult: Rb-Sr whole-rock errorchrons yield erroneous 'ages' and zircon U-Pb data are not always easily interpreted.
The geochemistry of stream silt, North Greenland
Authors: Steenfelt A
Published: June 2021

As part of a reconnaissance drainage sampling programme directed towards mineral exploration (Ghisler et al., 1979; Henriksen, this report), 318 samples of stream silt, collected in 1978, have been analysed for 18 elements by radioisotope excited energy-dispersive X-ray fluorescence and for U by delayed neutron counting. The results are used to describe the variation of element concentrations with respect to regional and lithostratigraphical changes in the Peary Land region. When these variations are known, anomalous concentrations of elements ean be distinguished and their significance evaluated with respect to possibie mineralisations.
Preliminary Bouguer anomalies of western North Greenland
Authors: Weng W.L
Published: June 2021

During the summer af 1979 the Geodetic Institute, Copcnhagen, continued the North Greenland survey, which was initiated in 1978 (Forsberg, 1979). This comprised establishment of ground control points by help of Doppler instruments combined with barometric, triangulation and doppler-derived heights as vertical control. During 1979, as a minor part of the surveying programme, a regional gravity network was established for the area belween Hall Land and Nansen Land (fig. 66).
Jurassic - Lower Cretaceous lithostratigraphic nomenclature for the Danish Central Trough
Authors: Jensen Thorkild Feldthusen , Holm Lise , Frandsen Nils , Michelsen Olaf
Published: June 2021

The Jurassic and Lower Cretaceous sequences have been subdivided into lithostratigraphic units. The subdivision is primarily based on interpretation of petrophysical logs like gamma ray, sonic, neutron and density logs. The lithology descriptions are based on evaluation of logs and descriptions of cuttings samples, in a few intervals supplemented by sedimentological characteristics interpreted from core samples. Biostratigraphic analyses as well as seismic interpretations have been used for correlation from well to well and for description of the sediment bodies. As far as possible the lithostratigraphic units established in the adjacent regions have been extended into the Danish region. In the Jurassic sequence the following new formations are established: Lola Formation, Heno Formation, and Poul Formation. Furthermore, a hot unit is separated from the Farsund Formation. The Lower Cretaceous Valhall Formation is slightly emended, as the new Tuxen Formation and Sola Formation are separated from it. The lowest part of the Valhall Formation is defined as the Leek Member. Finally, the Vyl Formation is established as a formation marginal to the basin.
The diagenesis of the Lower Triassic Bunter Sandstone Formation, Onshore Denmark
Authors: Fine Stanley
Published: June 2021

The Lower Triassic Bunter Sandstone Formation is a continental redbed sequence deposited under arid to semi-arid conditions in a low-energy, fluviatile-aeolian sabhka environment. The sediments display many diagenetic features in common with modern and ancient redbeds deposited under similar conditions, but local influences on the diagenetic assemblage by factors such as provenance, structural setting and depositional environment can be ascertained. With burial depths of only 1000-2000 meters, effects of compaction are limited, high intergranular porosities remain, and no clear depth-related patterns are noted. The diagenetic assemblage consists of quartz and feldspar overgrowths, Fe-Ti oxides, carbonates (calcite and dolomite), analcime, authigenic clays, anhydrite and halite. The distribution of authigenic minerals is controlled by sedimentary facies, with greater amounts of poikilotopic anhydrite and halite in sandstones and more abundant dolomite and analcime in claystones and heterolithic sands. In addition, the replacement of ferromagnesian minerals by mixed-layer clays results in the greater abundance of these clays in sandstones relative to claystones. A well-preserved eogenetic assemblage consisting of albite and quartz overgrowths, analcime, dolomite, calcite, gypsum and clays is indicative of highly evaporative conditions and may reflect higher sodium concentrations in the depositional brines associated with the more basinal, low-energy parts of the depositional environment. Such concentrated brines strongly influenced the diagenetic pathways. In contrast, anhydrite and halite are the product of mesogenetic reactions in association with late stage Zechstein brines which invaded the more permeable sands during halokinesis. The strength and character of the depositional brine is an early control on subsequent diagenetic evolution. Within the specific geochemical regime of a given lithofacies, selective reactions occur which characterize particular microenvironments. These reactions impart an early eogenetic imprint upon later diagenetic events.
Geology of the Søby-Fasterholt area. Text
Authors: Koch Eske , Christensen E. Fjeldsø , Thomsen Erik
Published: June 2021

A general description of the Quaternary and Neogene of Central Jutland follows after an introductory survey of previous investigations in the area and the general regional geology of the Neogene of Denmark. The Quaternary morphology and especially the solifluction deposits and periglacial structures are described. The Tertiary deltaic browncoal bearing deposits of the S0by-Fasterholt area are described in detail (lithostratigraphy) based upon exposures, wells and the petrography of the browncoal seams. The Miocene marine Hodde Formation and the outcrops of the Gram Formation of the Søby-Fasterholt area are described in general. The Fasterholt Flora especially, but also the Damgaard Flora and the Søby Flora, is discussed in an extended chapter on the biostratigraphy, and the pollen- stratigraphy is compared to the Lower Rhenian region. Finally, The exposures revealing pre-Weichselian disharmonic folding and faulting caused by compression are described and compiled.
Log-sequence analysis and environmental aspects of the Lower Jurassic Fjerritslev Formation in the Danish Subbasin
Authors: Michelsen Olaf
Published: June 2021

The lithostratigraphic, biostratigraphic, and chronostratigraphic subdivisions of the Lower Jurassic Fjerritslev Formation in the Danish Subbasin are discussed in relation to a log-sequence analysis. The formation is subdivided into three depositional sequences. The upper and lower sequences comprise 15 minor log-sequences, which can be correlated between most well sections. These minor log-sequences are separated by strata boundaries, which by means of biostratigraphic data are shown to be synchronous. The depositional environment is discussed on the basis of previously published data and new organic geochemical data, and in relation to the published sealevel curve. Five major events of eustatic sea-level rises seem to have influenced the benthonic faunas; faunal diversity and density decreased during the sea-level rises, and subsequently increased during the higher sea-level stillstands. The level of oxygen in the bottom waters decreased during the Early Jurassic transgression.
Foreløbige geologiske kort (1:25.000) over Danmark. Forklaring til kortene og vejledning i deres brug
Authors: Sørensen Henning , Heller Erik
Published: June 2021

Den geologiske kortlægning af Danmark er ikke afsluttet. Ydermere er en del af kortlægningsresultaterne endnu ikke publiceret. Da der er et betydeligt behov for geologiske data inden for planlægning, administration, råstofkortlægning, m.m., har DGU besluttet at stille alle foreliggende geologiske kortlægningsdata til rådighed i form af foreløbige geologiske kort i 1:25.000. Kortene viser fordelingen af de forskellige jordarter mellem jordoverfladen og dybden 1 m. Grænserne mellem de forskellige jordarter er angivet, idet de enkelte jordarter er betegnet med bogstavsignaturer. Kortene vil ikke blive trykt, men kopier kan erhverves mod betaling af reproduktion og forsendelse. Nærværende publikation gør rede for den geologiske kortlægnings stade, planerne for den fortsatte kortlægning, fremstillingen af de foreløbige kort, anvendelsen af disse kort og visse fejlkilder, samt i bilag 1 for kortenes indhold af geologiske oplysninger.
The Hanklit Gaciotectonic Thrust Fault Complex, Mors, Denmark
Authors: Klint Knud Erik S , Schack Pedersen Stig A
Published: June 2021

The Hanklit cliff section is a classical glaciotectonic locality where an excellent cross-section through a thrust fault complex is exposed. The thrust imbrications were thrust from north to the south during a Late Weichselian glacier advance. Three thrust sheets with thickness of more than 50 m are involved in the thrust fault complex. The deposits exposed in the cliff-section comprise ca. 39 m diatomite with ash layers of Paleocene-Eocene age (the Fur Formation), overlain by up to 27 m of Quaternary glacigenic sediments. Common structural features related to compressional thrust fault helts, are recognizable in the glaciotectonic complex, which shows a lateral shortening of more than 40%. Structures created by soft sedimentary deformation due to high water pressure occur in relation to the thrust fault zones. The structural framework is described with the terminology of thin-skinned tectonics and flats, ramps and hanging-wall anticlines are identified in the cliff-section. A balanced cross section has been constructed. Based on this construction the structural model is verified and the glaciotectonic development is interpreted. A geoelectrical investigation has been made to support the construction of the 3-dimensional framework of the thrust complex. This demonstrates that the impressive Hanklit thrust sheet extends for more than 1 km along the strike and is displaced more than 200 m to the south. Superimposed extentional structures, situated above the sole of the Hanklit Thrust Sheet, are interpreted to be related to Tertiary subsidence tectonics.
Dinoflagellate stratigraphy of the uppermost Danien to Ypresian in the Viborg 1 borehole, central Jylland, Denmark
Authors: Heilmann-Clausen Claus
Published: June 2021

Dinoflagellate cysts in the uppermost Danian to Lower Eocene section in the cored Viborg 1 borehole are described. The stratigraphical distribution of the dinoflagellates is shown; eight informal dinoflagellate zones are suggested. The dinoflagellate assemblages in sediments from various Danish localities are correlated with the Viborg 1 cores. A correlation with assemblages from other European Paleocene-Lower Eocene deposits is proposed. Two new species are described, and two new combinations are proposed.
Foraminiferal stratigraphy of Quaternary deposits in boring no. 51.12 Anholt, Kattegat
Authors: Lykke-Andersen Anne-Lise
Published: June 2021

Material from a 229 m deep boring on the island of Anholt in the central part of the Kattegat has been stratigraphically analysed on the basis of its foraminiferal content. Due to the lack of casing in the main part of the bore hole, only very few core samples and some samples from the drilling bit were not contaminated. The results of the foraminiferal analyses have, therefore, to be treated with some reservation. The boring did not penetrate the Quaternary. The bottom 143 m of the boring represents deposits of pre-Eemian, possibly Saalian age. This interval seems to contain three marine interstadials, Anholt 1, 2 and 3, of which the upper interstadial is the warmest. Tills and glaciofluvial sediments are found between the marine sequences. The Eemian is represented by 13 m of marine deposits, which can be correlated with Eemian deposits known from other localities in the Vendsyssel-Kattegat region. They correspond to the Lower Turritella terebra Zone of the Skærumhede Series. The Early Weichselian and the lower part of the Middle Weichselian are missing, while the upper part of the Middle Weichselian, 32 m in all, is represented by marine deposits corresponding to foraminiferal zones known from the Vennebjerg Stadial and the Sandnes lnterstadial in the Vendsyssel-Kattegat region. These Middle Weichselian zones correspond to the upper part of the Portlandia arctica Zone of the Skærumhede Series. The non-marine sequence on top of these deposits is considered to be glacial, belonging to the main Weichselian glacial event. Holocene littoral sands and gravels terminate the Quaternary sequence at Anholt.
Pre-Late Cretaceous structural development of the Danish Central Trough
Authors: Michelsen O. , Mogensen T.E.
Published: June 2021

The structural development of the Danish Central Trough area from the Carboniferous to the Early Cretaceous was studied to test how far back in geological time a graben development can be justified or proved by data.
Structural development of the Dutch Central Graben
Authors: Schroot B.M.
Published: June 2021

After Heybroek (1975) described the structure of the Dutch Central North Sea Graben and NAM and RGD (1980) published a stratigraphic nomenclature of the Netherlands containing a stratigraphic model for the Jurassic sediments, further work continued, both within the industry and the Geological Survey. Because Herngreen and Wong (1989) set up a revised stratigraphy for the Late Jurassic of the Central Graben and neighbouring areas, it was felt necessary to have a closer look at the structural geology of the Central Graben and to review its hydrocarbon potential. The results of this study have been reported by Wong et al. (1989). This work just about coincided with an increased interest of the industry in the south-eastern extension of the Graben because of the Dutch seventh round of exploration licenses.
Triassic
Authors: Jacobsen Finn
Published: June 2021

Deposition during the Triassic continued in the basinal areas developed during the Permian, but in Early Triassic the highs were also gradually covered by sediments. The pattern of sedimentation in the two mega-basins is analogous to that of the Rotliegendes, i.e. with a pronounced, more coarse-grained elastic infill in the northern basin (fig. 20). The Triassic represents a regressive period in the North Sea area, with dominant continental sedimentation of sandstone, shale, and evaporites in red bed facies. Strong subsidence is recorded in the center of the Danish Subbasin with more than 5000 m Triassic sediments, and in the Horn Graben with approximately 3000 m. In the Danish Central Graben the Triassic has not yet been mapped, but thicknesses of about 2000 m or more are expected locally.
Late Cretaceous and Danian limestone
Authors: Lieberkind Kirsten , Bang Inger , Mikkelsen Naja , Nygaard Erik
Published: June 2021

At the termination of the Early Cretaceous period, the sea transgressed large earlier land areas. The transgression, the reduced relief of the continents, the generally diminished tectonic activity, the climatic change, and the enormous production of calcareous nannoplankton in the oceans profoundly changed the gross facies pattern in the North Sea region. The elastic sedimentation was replaced during Late Cretaceous time by offshore relatively deep water carbonate sedimentation. This resulted in the deposition of a chalk sequence reaching a thickness of 1-2 km in the Danish Subbasin and the North Sea area.
Potential hydrocarbon traps
Authors: Koch Jens Ole
Published: June 2021

The formation of hydrocarbon traps is the result of local depositional and deformational history. The trap formation is governed by three main parameters: the geometry of the reservoir body, the sedimentary sealing history and the tectonic history. In the present chapter is discussed the distribution of potential hydrocarbon traps in different areas, each characterized by a structural style (figs. 47, 48). After a short definition of basic trap types, various areas of the Danish Central Graben, each of which is characterized by a certain structural style, are listed and described with emphasis on the distribution of potential hydrocarbon traps.
A COMBINATION OF FASTER R-CNN AND YOLOv2 FOR DRONE DETECTION IN IMAGES
Authors: Việt Phạm Văn
Published: June 2021

Ngày nay, máy bay không người lái (drone) được sử dụng rộng rãi cho các mục đích khác nhau vì chúng không quá đắt. Các drone được sử dụng làm các phương tiện mang vật liệu nổ, máy ảnh và vật bất hợp pháp có thể gây ra các mối đe dọa an ninh. Thị giác máy tính có thể được áp dụng để phát hiện các drone hoạt động bất hợp pháp một cách hiệu quả trong nhiều điều kiện khác nhau. Một hệ thống dựa trên máy tính sử dụng các camera hiện đại có thể phát hiện ra các drone nhỏ ở xa. Hệ thống cũng có thể nhận biết được các drone tốc độ thấp và không được điều khiển từ mặt đất. Hơn nữa, hệ thống có thể hiển thị các drone thực sự. Điều này giúp hệ thống thân thiện với người dùng. Bài báo này đề xuất một cách tiếp cận lai kết hợp hai mạng nơ-ron tích chập mới nổi: Faster R-CNN và YOLOv2 để phát hiện các drone trong ảnh. Kết quả thử nghiệm cho thấy rằng phương pháp này có thể thêm tới gần 5% và hơn 11% cho độ chính xác và độ tái hiện cho Faster R-CNN và thêm tới 3% và hơn 6% cho hai chỉ số này cho YOLOv2. Việc phát hiện tốt hơn này là kết quả của sự kết hợp của hai mạng. Nếu một mạng không thể phát hiện các drone trong một bức ảnh, mạng khác có thể trợ giúp.
Control robusto de la actitud para el seguimiento de trayectoria de un VANT
Authors: Diaz-Tellez Juan , Estevez-Carreón Jaime , Silva-Juárez Alejandro , García-Ramírez Rubén Senén
Published: June 2021

This paper proposes a robust attitude tracking control applied to Vertical Take-off and Landing Micro Aerial Vehicles (VANT) based on Active Disturbance Rejection Control (ADRC) approach. The proposed technique groups the endogenous and exogenous disturbances into a total disturbance, which is estimated online via extended state observer (ESO). Once the disturbance is determined, a quaternion-based controller is proposed, which compensates and relieves the disturbance actively. The control law is bounded; consequently, it takes into account the maximum capabilities of the actuators. The stability proof of the closed-loop (observer and control) is guaranteed in the ISS sense. The simulation results allow validating the theoretical features.
Didactic demonstration of 3gdl robot dynamics and partitioned control for trajectory tracking
Authors: Ramírez-Aguirre Miguel , Ortiz-Simón José Luis , Aguilera-Hernández Martha , Cruz-Hernández Nicolás
Published: June 2021

The article presents the analysis of a robot with three degrees of freedom to follow trajectories through a partitioned control. Which is made up of two revolute and one prismatic joint where the end effector is located, that allows it to move correctly in its work area. This robot has a different structure from those most studied and analyzed by current literature, therefore it presents an opportunity to be used as a didactic resource, due to the structure, the degrees of freedom and the affinity of the models used by the students. The analysis consists of the use of the DH rule for the assignment of frames and referential axes, centers of mass, dynamic model by Jacobian and Christoffel symbols, inverse kinematic model, variables such as friction, gravitational and friction compensation, ending in a model in "Simulink" capable of following trajectories from the partitioned control law.
Analysis of drag and lift forces for a sedan car using a rear lip spoiler
Authors: Hortelano-Capetillo Juan Gregorio , Martínez-Vázquez J. Merced , Zúñiga-Cerroblanco José Luis , Rodriguez-Ortiz Gabriel
Published: June 2021

In this research, aerodynamic tests were carried out using Solidworks Flow Simulation software on a Sedan-type car, implementing different sizes of lip-type spoilers at the rear to obtain the results of the drag and lift coefficients produced by movement. of the air regardless of the design at the rear of the car and analyze if there was improvement in aerodynamics. Analyzing the results, it is obtained that the aerodynamics of the car is improved when a lip-type spoiler is fitted, the lift forces were reduced, whereas the drag forces remained constant for all the different designs.
La Filosofía de la Economía de Suficiencia: una Nueva Perspectiva para el

Desarrollo de los Emprendimientos Sociales desde Tailandia
Authors: Contipelli Ernani , Picciau Simona
Published: June 2021

A raíz de las actuales crisis globales que impactan la humanidad, los esfuerzos cooperativos se articulan entre múltiples y distintos actores sociales, con el objetivo de crear sinergias positivas y colocar al planeta en una ruta más sostenible y resiliente. Ante tal situación internacional, los emprendimientos sociales se estructuran en la creación de propuestas de cambio sistémico de nuestros tradicionales paradigmas sociopolíticos. Es por esta razón que, el objetivo del presente artículo es la discusión sobre la aplicación de la Filosofía de la Economía de Suficiencia al desarrollo de los emprendimientos sociales. Esto, se desarrollará para comprender mejor los impactos sociales y ambientales generados por dicho modelo de negocios, específicamente en el mundo post-COVID-19. Asimismo, el estudio se instrumentaliza a partir de tres aristas analíticas: I. Análisis general del concepto “emprendimientos sociales” y su relación con el Triple Bottom Line y la Responsabilidad Social Empresarial, II. Discusión sobre los Objetivos de Desarrollo Sostenible y III. Integración y relación de los puntos anteriores con la Filosofía de Economía de Suficiencia.
Exploring the Relationship between Working Capital Management, Profitability and Capital Structure
Authors: Abdussalam Abdalla Geth , Darun Mohd Ridzuan
Published: June 2021

Objective - This paper explores the relationship between working capital management (WCM), profitability and capital structure. A preliminary framework provides an understanding of the role of WCM components with capital structure and profitability.

Methodology/Technique - From the review of empirical studies it is confirmed that WCM is a main component in the financial aspects of the firms as even though WCM is targeted for the short-term decisions it has effect on the firm for the long-run.

Findings - Companies need to use working capital policy and procedures in order to navigate performance. Emphasizing on WCM would lead to formal cost controls and performance together with firm's growth and productivity. The framework is set to help financial manager of the firms to balance the costs and benefits of debt and equity and reduce common obstacles on managing cash flows for long-term fixed investment.

Novelty - The preliminary framework is original and unique that will contribute towards the enrichment of relevant literature. Practically, this study contributes to provide a better understanding of the managers and enable them to apply WCM strategies and make sure the firm is able to meet the stakeholder requirements.

Type of Paper Review

Keywords: Working Capital Management; Capital Structure; Profitability;

JEL Classification: O16, M41.
Do Intellectual Capital, Corporate Social Responsibility, and Good Corporate Governance Affect Indonesia's Mining Companies Value?
Authors: Putri Nadia Azalia , Gumanti Tatang Ary , Fadah Isti , Supriyadi Supriyadi
Published: June 2021

Objective - The purpose of this study was to analyze the effect of Intellectual Capital (IC), Corporate Social Responsibility (CSR) disclosure, and Good Corporate Governance (GCG) on the value of mining companies (as measured by Tobin's Q) listed in Indonesia Stock Exchange period 2011-2015.

Methodology/Technique - Intellectual capital was measured by Value Added Capital Employed (VACA), Value Added Human Capital (VAHU), and Structural Capital Value Added (STVA). CSR disclosure was measured using Global Reporting Initiative index. GCG was proxied using independent commissioner, managerial ownership, audit committee, and institutional ownership. Empirical analysis was conducted using linear multiple regression analysis. The samples consisted 15 mining firms.

Findings - The results showed that VACA, VAHU, and institutional ownership had a positive and significant effect on company value. STVA and independent commissioner have a positive but insignificant effect on company value. Audit committee and managerial ownership have a negative and insignificant effect on company value.

Novelty - The study suggests managers to improve the company value by investing IC subcomponents; that is, physical capital and human capital and also add the number of shares held by institutions.

Type of Paper: Empirical

Keywords: Company Value; Corporate Social Responsibility; Good Corporate Governance; Intellectual Capital.

JEL Classification: M14, M41, M51
Impact of Companies' Financial Condition and Growth toward Acceptance of Going Concern Audit Opinion: Empirical Study at Company Listed in the Jakarta Islamic Index (JII)
Authors: Wardayati Siti Maria , Sulistiyo Agung Budi , Junusi Rahman El , Alamsyah Alamsyah , Afnany Labitsta Untsa
Published: June 2021

Objective - This study aims to explain the companies' financial condition and growth which is affecting going concern audit opinion of the companies listed in the Jakarta Islamic Index (JII). Financial condition is examined through the information changes in working capital to total assets, retained earnings to total assets, earnings before interest and taxes to total assets, book value of equity to book value of total liabilities, sales to total assets.

Methodology/Technique - This study applies qualitative research with a description method and the populations used are all companies listed in JII period 2014-2015.

Findings - The results of the study explained that the companies' financial conditions affect going concern audit opinion. The worse the financial condition of the company, the greater the probability of companies to receive going concern audit opinion, and vice versa. An auditor will give a going concern audit opinion on companies that are experiencing financial difficulties. The growth of the companies affects going concern audit opinion. If the sales growth is negative, the continuity of the company will be unstable, because the company will be difficult to make profits. It can cause the financial conditions of the company experience difficulties, so that the company will receive going concern audit opinion.

Novelty - The study contributes literature with its empirical findings in the context of Indonesia.

Type of Paper: Empirical

Keywords: Working Capital to Total Assets; Retained Earnings to Total Assets; Earnings Before Interest and Taxes to Total Assets; Book Value of Equity to Book Value of Total Liabilities; Sales to Total Assets and the Company's Growth.

JEL Classification: M41, M42.
Dramaturgy Budget Policy Formulation: Intuitive Response of Politics and Power
Authors: Syarifuddin Syarifuddin , Yusuf Marwah
Published: June 2021

Objective - This study aims to capture the perspective people and government in Jembrana Bali about politics and power, as a starting point for budget policy formulation.

Methodology/Technique - The methods used in this study is dramaturgy. It is a method to analyze the front stage and back stage of the actors setting.

Findings - This study found that the way people and government of Jembrana view politics and power is a starting point for budget policy formulation. This study found that accounting man uses power and politics in formulating accounting policies. In this case, actors develop policy as a meaning of the policy for the actors.

Novelty - Unlike another study, this study using dramaturgy to observe human behavior. This technique is more interested in studying people as they are rather than adjusting them into propositions and theories that are already known.

Type of Paper: Empirical

Keywords: Local government; Budgeting; Planning; Dramaturgy; Power; Politics.

JEL Classification: H61, H83, M41.
The Influence of Leadership and Organizational Structure on The Quality of Accounting Information System
Authors: Rapina Rapina
Published: June 2021

Objective - The purpose of this research is to test and find empirical evidences on the effect of leadership and organization structure in the quality of accounting information system.

Methodology/Technique - The analytical units used in this research are state-owned enterprises enlisted in Bandung. The total samples are 49 respondents worked for state-owned enterprises in Bandung. Sample selection is done using purposive sampling method. The hypothesis in this study is tested by using multiple linear regression.

Findings - There are two variables that significantly influence quality of accounting information system. These are leadership and organizational structure.

Novelty - The study looked at the effect of leadership and organizational structure that significantly influence quality of accounting information system.

Type of Paper: Empirical

Keywords: Leadership; Organizational Structure; AIS; Information System; System.

JEL Classification: M15, M41.
The Effect of Corporate Governance, Ownership and Tax Aggressiveness on Earnings Management
Authors: Alexander Nico , Christina Silvy
Published: June 2021

Objective - The purpose of this research is to empirically examine the effect of corporate governance, ownership and tax aggressiveness on earnings management.

Methodology/Technique - The population of this research consists of non-financial companies listed on the Indonesian Stock Exchange (IDX) between 2013 and 2015. This research uses 3 recent years and utilizes different variable that have not been used in prior research. The 67 samples were choose using a purposive sampling method. The hypotheses are tested using multiple regression analysis with the SPSS program, to investigate the influence of each independent variable on earnings management.

Findings - The results show that the board of director have a positive influence on earnings management, while board independence, audit quality, managerial ownership, and tax aggressiveness have no influence on earnings management.

Novelty - This research add value in the existing literature and empirically study the effect of the board of directors, independence of the board, audit quality, managerial ownership, and tax agressiveness on earnings management.

Type of Paper: Empirical

Keywords: Earnings Management; Corporate Governance; Ownership; Tax Aggressiveness.

JEL Classification: M40, M41, M49.
Earnings Management, Effective Tax Rate (ETR) and Book-Tax Gap (BTG)
Authors: Jasrial Jasrial , Puspitasari Susy , Muktiyanto Ali
Published: June 2021

Objective - This research examines the effect of company size, changes in out-cash flow, return on assets, conservatism, and profit levelling on earnings management.

Methodology/Technique - The results of this research show that banking capital structure, capital intensity, intensity of inventory, and intensity of R & D have a significant impact on effective tax rates. Further, the results also show that, with respect to the non-banking sector, R & D expenditure contributes significantly to effective tax rates. Simultaneously, earnings management and effective tax rates, as well as other factors, also have an effect on book tax gap.

Findings - This study shows that profit management has a significantly positive effect on book tax gap, and effective tax rates has a significant negative effects o book tax gap. In terms of the non-banking sector, earnings management and effective tax rate have no effect on book tax gap. Deferred tax expenses have a lower capability to detect earnings management than accrual, in both the banking and non-banking sector.

Novelty - The study of management capabilities optimizes the role of book tax gap and effective tax rate for earning management. Both tax management and earnings management are closely related to behavior management in managing a company based on the agency theory. Furthermore, the study identifies a relationship between earnings management and book tax gap.

Type of Paper: Empirical

Keywords: Book Tax Gap; Effective Tax Rate; Earnings Management; Accrual Total; Indonesia.

JEL Classification: H26, H29.
Accrual Basis Landscape: The Absence of Political Will in Preventing Dysfunctional Behaviour in Indonesia
Authors: Syarifuddin Syarifuddin
Published: June 2021

Objective - This research aims to reveal the failure of accrual accounting to create good governance and clean government in local governments in Indonesia. Additionally, the research seeks to examine the increase in accrual based rapid growth in Indonesia and the instance of corruption among government officials.

Methodology/Technique - In connection with this objective, the study explains the practical perspective of political intervention during the adoption of accrual accounting and examines the role of the community in the implementation of accrual accounting using a critical phenomenology method.

Findings - The findings of this study show that accrual-based accounting encourages deviant behaviour within the public sector and hence, good governance and clean government cannot be achieved. Accrual basis in this regard becomes a means for actors to conceal fraud by exploiting the weaknesses of accrual-based accounting to allow for creative accounting.

Novelty - This study uses a qualitative method to describe the implementation of accrual-based accounting in local governments in Indonesia, which is a new approach to this phenomenon.

Type of Paper: Empirical

Keywords: Accrual; Accounting; Public Sector; Good Governance; Clean Government; Indonesia.

JEL Classification: M10, M14, M19