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Marmorforekomster opptrer på 3 tektonostratigrafiske nivåer i Midt-Norge: Seve- og Köli-ekvivalente dekker i Øvre allokton samt Helgeland dekkekompleks i Øverste allokton. Amfibolittfacies Sevedekke-bergarter opptrer først og fremst som tynne isoklinalt innfoldete soner i Vestranden og omfatter amfibolitter, kalksilikatbergarter og glimmerskifre. Baltiske kontinentranden som ble sub- dusert og metamorfosert i amfibolittfacies (og delvis eklogittfacies) for 500 Ma siden.
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.
Mannen is an unstable rock slope in the Romsdal Valley in the Møre og Romsdal County (western Norway). The slope is under continuous monitoring since 2009 by the Åknes/Tafjord Beredskap IKS. As part of the detailed site investigations, two more than 130 m deep, vertical cored boreholes have been drilled in 2010 and 2011.
Forkortet: The western coast of Norway is particularly vulnerable to active rockslide development due to the recent post-glacial uplift and the deep incision of the fjords created by glacial activity, leading to extremely steep fjord sides. The purpose of this work was to determine the influence of structural geology on the hazard analysis related to large rock avalanches in the Storfjorden area.
The borehole KH-08-12 was drilled in August/September 2012 by Geo Drilling and the logging was executed in March 2013 by the Geological Survey of Norway (NGU). The borehole is located at WGS-84 6895850N 395400E zone 32W and ca. 735 meters above sea level, at the upper western part of the Åknes rock slope. The drill cores are logged with regards to bedrock type, fracture frequency and zones of interest with respect to sliding plane(s).
The project aims to produce a modern geoscientific atlas and databank to be used in prospecting for mineral resources and in the evaluation of environmental and geochemical issues within a belt extending from W of Norway to the E border of Finland. The N and S limits of the project area meet the coast at Syv Søstrene and Stad respectively.
This guidebook was prepared for the Norwegian part (seven days) of Excursion no.
Åknes is known as the most hazardous rockslide area in Norway at present, and is among the most investigated rockslides in the world, representing an exceptional natural laboratory. This study focuses on structural geology on five zones to interpret and understand the geometry of the rockslide area. The interpretations are further used to build a geological model of the site.
The field trip of the 3rd Slope Tectonics conference visits areas of past rock slope failures and present-day unstable rock slopes and aims to discuss the structural and geological conditions of these sites, the morphologies and tectonic fabrics induced by slope movements and the role of glaciers, isostatic uplift and major faults in the development of rock slope failures.
... anomalier som indikerer oppsprekning, og i samtåd med geolog er det satt ut brønner. Geofysiske målinger over mulig vannførende ...
Rapporten presenterer følgende gravimetriske fargekart; Et kart over observerte Bougueranomalier, og et residual anomalikart for områdene 62 grader N til 67 grader N i målestokk 1:1 mill. Et residual kart i målestokk 1:500 000 over Trøndelag. Kartene kan bestilles ved NGU. Metoder for residual-regional separasjon diskuteres. En grafisk metode, som forfatteren har kalt "Profilmetoden", er utviklet og brukt til å framstille residualkart.
As part of the prospecting activities of the oil company PERTRA at "The Frøya High", the Geological Survey of Norway (NGU) was asked to provide resistivity values of the underlying basement rocks. PL321 is considering to use Sea Bed EM Resistivity Logging to evaluate the hydrocarbon possibilities in the area. At the Frøya Høgda, Upper Jurassic reservoir sandstone is lying directly upon Frie emneord: Laboratorieforsøk ; Brønnlogging : Resistivitet ; PL 321
Mannen is an unstable rock slope located in Romsdalen in Møre og Romsdal county. The most active part is located in the uppermost part of the slope and has an estimated volume of 2.5-3 Mm3 and moves with a velocity of approximately 4-5 cm/year. Since 2009, the unstable rock slope at Mannen is under continuous monitoring by the Åknes/Tafjord Beredskapssenter IKS. A 138 m deep, vertical cored borehole has been drilled in 2010 in the uppermost part of the Mannen rock slope.
This report describes a one-day field trip to observe relationships between brittle normal faults and landscape evolution on a post-glacial passive margin.
I 1966 ble det tatt 9 forskjellige bergartsprøver: 4 prøver av grunnfjellsbergarter fra Folladalen i Trollheimen, 3 prøver av en granitt ved Eidfjord, Indre Hardanger, 1 prøve av en granittgneis fra Hardangerjøkulen og 1 prøve av en rhyolitt fra Hjartdal i Telemark. Resultatene er publisert i 1967 av Lab. voor Isotopen Geologi i Amsterdam.
Gravity and magnetic data were acquired in the area of Eidsøra, close to Tingvollfjorden, where different segments of the Møre-Trøndelag Fault Complex are proposed. The new data assist in identifying the fault segments and to gain a better understanding of its subsurface expression. In total 265 new gravity stations were established in an area of 4x4 km, and 14 magnetic profiles were measured.
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.
Geology and petrochemistry of the Smøla-Hitra Batholith, Central Norway.Håvard Gautneb, David RobertsPage(s): 1-24
Glacial geology of Middle and Inner Nordfjord, western Norway.Olav W. FarethPage(s): 1-55
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.
The Geological Survey of Norway (NGU) have assessed the possibilities for use of saline groundwater in fish-farming and research, through a research project at the aquaculture research institute AKVAFORSK at Sunndalsøra. From the data collected during the study, the following conclusions can be drawn: -Salt groundwater appears to have a high and stable mineralogical (inorganic chemical) quality, which is well suited to use in aquaculture. Its stable temperature is another positive factor.
Trekantformede jordskred (også kalt ikke-kanalisert jordskred; Debris avalanche) er en skredtype som kjennetegnes ved at skredet starter i et punkt og utvider seg langs skredløpet til en stor bredde i dalbunnen. Dette bidrar til at slike skredhendelser kan bli svært ødeleggende for samfunnet. Trekantformede jordskred er ikke den vanligste skredtypen i Norge og er derfor lite beskrevet tidligere.
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.
Geometry and vertical extent of the late Weichselian ice sheet in northwestern Oppland County, NorwayBjørn Follestad, Ola FredinPage(s): 1-19
Geology of the Hemnefjord-Orkanger area, south-central Norway.Robert D.
The report provides an evaluation of the hazard related to Skår/Baraldsnes area in accordance with a contract with Hydro Technology and Projects. Geological and historical data on rock-avalanche events demonstrate that the high-risk areas are concentrated to the inner part of deep fjords of western Norway. The studied locations, Baraldsneset, Oppstadhornet and Hellenakken, are situated outside the high-risk areas.
I et samarbeid med Statens vegvesen Region Midt har Norges geologiske undersøkelse (NGU) utført berggrunnsgeologisk og strukturgeologisk kartlegging i områdene der E39 er planlagt å krysse Romsdalsfjorden bl.a. med tunnel under fjorden. I tillegg har NGU vurdert om det finnes hittil ukjente ustabile fjellparti som kan være en trussel for den planlagte fjordkrysningen.
Geology and metamorphic evolution of the Roan area, Vestranden, Western Gneiss Region, Central Norwegian Caledonides.Charlotte MøllerPage(s): 1-31
Bedrock geology of the Altevatn-Måskanvarri area, Indre Troms, northern Scandinavian Caledonides.Lars Kristian StølenPage(s): 5-23
Past landslide deposits store valuable and important information that can be used for geohazard analysis. This includes data on frequency of events, run-out distances and dynamics of rock avalanches. Investigations of rock-avalanche events also give possibilities for back-calculation (modelling of avalanches), such as conditions for sliding in potential unstable slopes. A complete swath bathymetry dataset from the inner parts of Storfjorden and its tributary fjords has been studied.
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.
Neotectonics in the Ranafjorden area, northern NorwayOdleiv Olesen, Svein Gjelle, Herbert Henkel, Tor Arne Karlsen, Lars Olsen, Terje SkogsethPage(s): 5-8
From Archaean to Proterozoic on Hardangervidda, south NorwayAnne Birkeland, Ellen M.O. Sigmond, Martin J.