24 resultater
Arbeidets formål har vært å kartlegge Jotundekkets anorthosittiske bergarter for påvisning av forekomster av anortositt som kan egne seg som råstoff for Al-produksjon. I rapporten er samlet resultater av undersøkelsene utført av NGU og andre siden 1975. Arbeidet har medført omfattende feltundersøkelser, XRF-analyser for hoved- og sporelementer, og mikrosondeanalyser. Undersøkelsene har medført en nytolkning av tektonostratigrafien i de kaledonske dekkeområdene mellom Hardanger og Sogn.
Fortrolig til 04.05.2003. The Engebøfjellet eclogite deposit is situated at the northern side of Førde- fjord near the small community Vevring in Naustdal kommune, Sogn og Fjordane county, W.Norway. Geologically the Førdefjord area belongs to the "Western Gneiss Region", between the Devonian Kvamshesten basin to the south and the Devonian Håsteinen basin to the North.
Confidental until 31.12.2003. Geological mapping of a planned extraction area for hard rock aggregates has been carried out at Gulstø, Bremanger for EUROVIA. A number of hand-specimens were collected and thin-sections of these rocks were subsequently examined under the microscope.
Geological mapping of a planned extraction area for hard-rock aggregates has been carried out at Seljestokken, Flora municipality, for Hertig Natursteine AG. A number of hand-specimens of the bedrock were collected and thin-sections were subsequently examined under the microscope. The bedrock of the area consists of fine-granied, Devonian sandstone with a few, thin beds of siltstone. The thin-sections show that the grain size usually ranges between 0.4 and 0.05 for most of the rocks.
The report is a guidebook for a four day excursion in connection to the COPENA meeting held at NGU 18.-22.Aug.1997. The first day of the excursion will visit localities in the Caledonian Nappes at Oppdal, and then continue over Sogne- fjell to Sogndal with stops along the contacts to the Jotun Nappe and in the nappe itself. The second day the excursion will continue through the Western Gneiss Region to Måløy with several stops in the Proterozoic gneisses.
In 1996, the Geological Survey of Norway started the project "Fracture zones and groundwater of Sunnfjord". The aim of the project was to get a regional understanding of deformation along bigger post-Devonian lineaments/fracture zones in crystalline rocks, and the relevance of these lineaments in connection with well capacity. This report presents results from the tracer tests, borehole tomography and electrical conductivity profiles conducted in September 1999.
The Geological Survey of Norway and the Norwegian Petroleum Directorate established the TWIN Project (Tropical Weathering In Norway) in 2009 to improve the understanding of deep weathering on mainland Norway as well as offshore. All known reports of deep weathering in Norway have been reviewed and registered in a GIS database.
Geological mapping of the planned extraction area for hard-rock aggregates named Gulestø in Bremanger, has earlier been carried out at for EUROVIA. The bedrock of the area consists of fine-granined, Devonian sandstone with thin beds of siltstone/claystone. Six samples for mechanical testing were collected in the second phase of the investigation. The results of the testing show very little variation in the mechanical strength.
Gravity data have been interpreted with a view to determining the depth extent of the Devonian Hornelen Basin. We find that the Hornelen Basin has a maximum depth of 3-4 km (below sea level). Uncertainity in the modelling originates in the low density contrast between the Devonian sedimentary rocks and the crystalline basement rocks. There is a rather close correlation between surface geology and gravity maps, which provides constraints on the gravity modelling.
This report presents geophysical interpretation of gravity data as part of a project whose main objective is to supplement the mapping of Quaternary geology at Stryn. This is achieved through the extraction of depth to bedrock information with the use of gravity data which in turn yields soil thickness and bedrock morphology maps.
A helicopterborne geophysical survey was undertaken by the Geological Survey of Norway (NGU) over the Gjølangen area in Sogn og Fjordane county. The primary geophysical target was rutile bearing eclogite bodies, and to investigate if helicopterborne geophysical surveying is suitable for prospecting of this type. The survey consisted nominally of 1065 line kilometres with a line spacing of 100 metres.
Utenfor Midt-Norge ligger det sedimentære bassenger like inntil fastlandet som kan inneholde olje/gass forekomster. Hovedstrukturelementer på land i Møre-Trøndelagområdet kan følges ut på kontinentalsokkelen. En slik strukturell sammenheng i overgangen land/sjø kan bare tolkes ved hjelp av geofysiske metoder. Petrofysiske data er avgjørende npr man ønsker å gjøre nøyaktige tolkninger av geologi fra aeromagnetiske og gravimetriske data.
Glacial geology of Middle and Inner Nordfjord, western Norway.Olav W. FarethPage(s): 1-55
This report gives an overview of Norwegian prospecting on anorthosites, with emphasis on the calcic types dominant in the Inner Sogn-Voss area of Western Norway. The high aluminium content of these large anorthosite bodies by the Sognefjord has made them the target of potential alternative sources for the aluminium-industry. In several phases during the last 90 years major Norwegian companies have done extensive geological investigations with this aim.
The eclogite province of W.Norway is subdivided into 8 geographic regions. The three southernmost of these regions - Holsnøy, Dalsfjord and Førdefjord, are surrounded by large areas without known eclogites, while the regions from Nord-fjord and northwards form parts of a large eclogite province. The rutile content is generally 1-2%; 3-4% rutile or more occur within some eclogites in the Holsnøy (Hordaland), Dalsfjord and Førdefjord (both Sogn and Fjordane) regions.
This report contains the scientific program and abstract volume for the lectures and posters presented during the Alice Wain Memorial West Norway Eclogite Field Symposium. The lecture and field symposium, held in Selje from June 21st-28th, 2003, focuese on the dynamic processes of high- and ultrahigh- pressure metamorphism and exhumation of eclogites and associated rock tupes. The Symposum commemorates the outstanding to contributions to west Norway eclogite research by the late Dr.
Gravity measurements have been carried out along 10 profiles in the region in between Naustdal and Engebø. The objective of the measurements was to detect new heavy bodies of eclogite and to map the extension to the depth of the known eclogite at Bygdahaugen. To confirm the ability of the gravity method, two profiles were measured across the known eclogite deposit in Naustdal. The size (depth) of this deposit should be estimated.
This report is a guidebook for the field excursions conducted during the Alice Wain Memorial West Norway Eclogite Field Symposium held in Selje from June 21st-28th, 2003. Eskola (1921) drew attention to some of the aesthetically impressive eclogites and garnet peridotites that outcrop in the coastal region of west Norway between Bergen and Trondheim.
Primary and re-equilibrated mineral assemblages from the Sveconorwegian mafic intrusions of the Kongsberg and Bamble areas, Norway.John D. Brickwood, James W.
Geology of the Hemnefjord-Orkanger area, south-central Norway.Robert D.
Industrian minerals - towards a future growthTor-Arne Karlsen, Brian SturtPage(s): 7-14Download  3,7 MB
Bedrock geology of the Altevatn-Måskanvarri area, Indre Troms, northern Scandinavian Caledonides.Lars Kristian StølenPage(s): 5-23
The present report aims on graviational slope failures in Møre & Romsdal andSogn & Fjordane counties. It presents selected examples and an overview of theregional occurrence of rock avalanches and other bedrock failures.
From Archaean to Proterozoic on Hardangervidda, south NorwayAnne Birkeland, Ellen M.O. Sigmond, Martin J.