Geological Survey of Denmark and Greenland Bulletin最新文献

{"title":"Potential hydrocarbon reservoirs of Albian–Paleocene age in the Nuussuaq Basin, West Greenland","authors":"M. L. Hjuler, N. Schovsbo, G. Pedersen, J. Hopper","doi":"10.34194/geusb.v38.4408","DOIUrl":"https://doi.org/10.34194/geusb.v38.4408","url":null,"abstract":"The onshore Nuussuaq Basin in West Greenland is important for hydrocarbon exploration since many of the key petroleum systems components are well exposed and accessible for study. The basin has thus long served as an analogue for offshore exploration. The discovery of oil seeps on Disko, Nuussuaq, Ubekendt Ejland, and Svartenhuk Halvø (Fig. 1) in the early 1990s resulted in exploration onshore as well. In several wells, oil stains were observed in both the siliciclastic sandstone and in the volcanic series. An important aspect of any petroleum system is a high quality reservoir rock. The aim of this paper is to review petrophysical aspects of the reservoir potential of key stratigraphic intervals within the Nuussuaq and West Greenland Basalt groups. Reservoir parameters and porosity–permeability trends for potential siliciclastic and volcanic reservoirs within the relevant formations of the Nuussuaq Basin are discussed below. Geological setting","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"8 1","pages":"49-52"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72712831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimising geological mapping of glacial deposits using high-resolution electromagnetic induction data","authors":"K. Klint, I. Møller, P. Maurya, A. Christiansen","doi":"10.34194/geusb.v38.4387","DOIUrl":"https://doi.org/10.34194/geusb.v38.4387","url":null,"abstract":"","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"81 1","pages":"9-12"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84131398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asynchronous ice-sheet development along the central East Greenland margin: a GLANAM project contribution","authors":"L. Pérez, T. Nielsen","doi":"10.34194/geusb.v38.4416","DOIUrl":"https://doi.org/10.34194/geusb.v38.4416","url":null,"abstract":"","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"2016 1","pages":"61-64"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82625709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospectivity mapping for orogenic gold in South-East Greenland","authors":"B. Heincke, B. M. Stensgaard","doi":"10.34194/geusb.v38.4405","DOIUrl":"https://doi.org/10.34194/geusb.v38.4405","url":null,"abstract":"","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"47 1","pages":"41-44"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77341506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An integrated public information system for geology, groundwater and drinking water in Denmark","authors":"M. Hansen, Charlotte T. Thomsen","doi":"10.34194/geusb.v38.4423","DOIUrl":"https://doi.org/10.34194/geusb.v38.4423","url":null,"abstract":"Denmark has a long tradition for having central geological databases, including a systematic collection and storage of geological and hydrological information from all surficial boreholes which was initiated in 1926. Since the mid-1970s such data have been stored digitally. A large variety of users access a central Danish, geological database: the public, for information about their local drinking water quality, environmental employees in municipalities, regions and the state for using, entering and updating data as well as consultants and drilling companies working for public administration and local water works. The local Danish administrative system previously consisted of 14 counties and 248 municipalities. The counties were responsible for groundwater mapping, drinking water management and activities concerning contaminated soil, as well as for harmonisation and transfer of data to the central database. With effect from 1 January 2007, this administrative system was replaced by five regions, seven environmental centres and 98 municipalities, which required major changes in the administrative handling of borehole data at the local and regional levels. For this, a public and shared central database was established and a countrywide harmonisation of data, transfer and storage was initiated and all geological, groundwater and drinking water data were transferred to this central database at Geological Survey of Denmark and Greenland (GEUS). In an updated database system, public authorities were set up to access the central database to store their relevant borehole data and almost all data were made publicly available. The database is maintained by GEUS. It is directly connected to other public databases at GEUS including the shallow geophysical database GERDA, where e.g. borehole loggings are stored, and to the Model Database where simple geological models are stored (Fig. 1). An integrated public information system for geology, groundwater and drinking water in Denmark","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"42 1","pages":"69-72"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82058625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arctic geopolitics and the beginning of earthquake monitoring in Denmark and Greenland","authors":"A. Jacobsen","doi":"10.34194/geusb.v38.4424","DOIUrl":"https://doi.org/10.34194/geusb.v38.4424","url":null,"abstract":"","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"20 1","pages":"73-76"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85687206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Buried tunnel valleys in Denmark and their impact on the geological architecture of the subsurface","authors":"P. Sandersen, F. Jørgensen","doi":"10.34194/geusb.v38.4388","DOIUrl":"https://doi.org/10.34194/geusb.v38.4388","url":null,"abstract":"Buried valleys are elongate erosional structures in the Danish subsurface now partly or completely filled and covered with younger sediments. The majority was formed by meltwater underneath ice sheets. The number of buried-valley structures in Denmark is large, and because the valley-infill in many areas hosts significant groundwater resources, knowledge of them and their formation is important. This was the starting point of the buried-valley mapping project, which was initiated in the late 1990s and continued until the end of 2015 (Sandersen & Jørgensen 2016). This project became part of the National Groundwater Mapping Programme which was set up with the purpose of mapping the groundwater resources within areas of specific groundwater interest (Thomsen et al. 2004). The areas of specific groundwater interest encompass existing catchment areas and cover around 40% of the country. Within these areas, high-density electromagnetic surveys have typically been performed together with exploration drilling and supplementary geophysical measurements. The mapping of the buried valleys has been based on these newly collected data as well as existing data in the national databases. In some instances, it has also been possible to map buried valleys in less data-dense areas outside the surveyed areas, mainly on the basis of borehole data. The groundwater resource and its vulnerability have been important in the mapping of the buried valleys. The valleys also constitute an important part of the subsurface geological architecture, and it is obvious that a thorough knowledge of them is critical for the general understandBuried tunnel valleys in Denmark and their impact on the geological architecture of the subsurface","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"11 1","pages":"13-16"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87156495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Greenland, Canadian and Icelandic land-ice albedo grids (2000–2016)","authors":"J. Box, D. As, K. Steffen","doi":"10.34194/GEUSB.V38.4414","DOIUrl":"https://doi.org/10.34194/GEUSB.V38.4414","url":null,"abstract":"Albedo, Latin for ‘whiteness’, is a term used to describe the amount of sunlight reflected by the ground. Fresh snow albedo can exceed 85%, making it among the most reflective natural substances. Warm conditions promote snow crystal metamorphosis that, like the presence of liquid water, bring snow albedo down below 65%. With the darkening, caused by the metamorphosis, absorbed solar energy thus increases by roughly a factor of two. Seasonal snow melts over the lower reaches of a glacier leading to the exposure of bare ice with albedo below 55%. Impurities such as dust, black carbon or microbes can bring glacier-ice albedo below 30%, meaning that snow ablation gives way to impurity-rich, bare glacier ice which increases absorbed sunlight by more than a factor of three. The thickness of the winter snow layer and the intensity of spring melt are important determinants of the annual glacier-ice melt, as the amount of snow cover governs the timing of darker ice exposure; the earlier the exposure, the more ice can melt. Because snow and ice albedo properties make it an amplifier of climate change, surface albedo has been designated as an Essential Climate Variable and a Target Requirement for climate monitoring (WMO 2011). Polar orbiting satellites facilitate albedo mapping with Arctic coverage multiple times per day in clear-sky conditions. Satellite-based retrievals of surface albedo depend on accurate compensation of the intervening atmosphere. Thus, without ground truth, the satellite retrievals are uncertain. In Greenland, snow and ice albedo is monitored by automatic weather stations (AWSs) from The Greenland Climate Network (GC-Net; Steffen et al. 1996) since 1995 and after 2007 from The Programme for Monitoring of the Greenland Ice Sheet (PROMICE; van As et al. 2013). Using the GC-Net data, satellite-derived albedo values are compared with ground data (e.g. Stroeve et al. 2013). Here, we present comparisons of daily GC-Net and PROMICE albedo data to satellite-derived albedo from the NASA Moderate Resolution Imaging Spectroradiometer (MODIS) MOD10A1 product (Hall et al. 1995). MOD10A1 data have been available since May 2000 and are here de-noised, gap-filled and calibrated into a daily 500 × 500 m grid covering Greenland, Iceland and the Canadian Arctic glaciers (Fig. 1).","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"9 1","pages":"53-56"},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82198689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cretaceous and Cenozoic dinoflagellate cysts and other palynomorphs from the western and eastern margins of the Labrador–Baffin Seaway - Fig. 6","authors":"R. Fensome, H. Nøhr-Hansen, G. Williams","doi":"10.34194/geusb.v36.4397","DOIUrl":"https://doi.org/10.34194/geusb.v36.4397","url":null,"abstract":". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Systematics – general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Systematics – dinoflagellates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Division Dinoflagellata Class Dinophyceae Genus Achilleodinium Eaton 1976 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Achilleodinium biformoides (Eisenack 1954) Eaton 1976 Genus Adnatosphaeridium Williams & Downie 1966a . . . . . . . . . . . . . . . . . . . . . . . . Adnatosphaeridium vittatum Williams & Downie 1966a Genus Alisocysta Stover & Evitt 1978 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alisocysta circumtabulata (Drugg 1967) Stover & Evitt 1978 Alisocysta margarita (Harland 1979a) Harland 1979a Genus Alterbidinium Lentin & Williams 1985 emend. nov. . . . . . . . . . . . . . . . . . . . . Alterbidinium acutulum (Wilson 1967a) Lentin & Williams 1985 Alterbidinium biaperturum (McIntyre 1975) comb. nov. Alterbidinium? bicellulum (Islam 1983a) Lentin & Williams 1985 Alterbidinium ioannidesii Pearce 2010 Alterbidinium varium Kirsch 1991 Genus Apectodinium (Costa & Downie 1976) Lentin & Williams 1977a emend. Williams, Damassa, Fensome & Guerstein in Fensome et al. 2009 . . . . . . . . . . . . . . . . . . . Apectodinium homomorphum (Deflandre & Cookson 1955) Lentin & Williams 1977a Apectodinium parvum (Alberti 1961) Lentin & Williams 1977a Apectodinium quinquelatum (Williams & Downie 1966b) Costa & Downie 1979 Genus Aptea Eisenack 1958 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aptea polymorpha Eisenack 1958 Genus Apteodinium Eisenack 1958 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apteodinium australiense (Deflandre & Cookson 1955) Williams 1978 Apteodinium spiridoides Benedek 1972 Genus Areoligera Lejeune-Carpentier 1938 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Areoligera circumsenonensis Fensome et al. 2009 Areoligera gippingensis Jolley 1992 Genus Areosphaeridium Eaton 1971 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Areosphaeridium diktyoplokum (Klumpp 1953) Eaton 1971 Genus Atopodinium Drugg 1978 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Atopodinium cf. haromense Thomas & Cox 1988 Genus Axiodinium Williams et al. in Fensome et al. 2009 . . . . . . . . . . . . . . . . . . . . . . Axiodinium augustum (Harland 1979b) Williams et al. 2015 Genus Batiacasphaera Drugg 1970 .","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80154179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biostratigraphic correlation of the western and eastern margins of the Labrador–Baffin Seaway and implications for the regional geology. Fig. 5","authors":"H. Nøhr-Hansen, G. Williams, R. Fensome","doi":"10.34194/GEUSB.V37.4356","DOIUrl":"https://doi.org/10.34194/GEUSB.V37.4356","url":null,"abstract":". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tectonic setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labrador Sea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Davis Strait and Baffin Bay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General stratigraphy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offshore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labrador Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Greenland Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffin Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Onshore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Greenland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . North-eastern Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Previous palaeontological studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Biostratigraphic results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lower Cretaceous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aptian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Albian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Upper Cretaceous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cenomanian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turonian–Santonian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Campanian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maastrichtian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .","PeriodicalId":49199,"journal":{"name":"Geological Survey of Denmark and Greenland Bulletin","volume":"33 1","pages":"1-74"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77790238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}