Blar i NGU-publikasjoner på emneord "DATERING"
Viser treff 21-40 av 93
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Compilation of geochronological data for Cenozoic volcanic activity on the African plate and for selected Northern African sedimentary basins
(NGU-Rapport (2012.014), Report, 2012)A compilation of published isotope geochronological data for Cenozoic volcanic \/ magmatic activity on the African plate and for part of the adjacent Antarctic plate was created within the African Plate project (TAP; ... -
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR
(NGU Bulletin (421), Journal article, 1991)Combined geological and petrochemical data suggest that the Lapland Granulite Belt can be divided into a lower sedimentary-volcanic unit and an upper, predominantly sedimentary sequence. Metamorphic rocks from the lower ... -
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway.
(NGU Bulletin (440), Journal article, 2002)Gas-release spectra derived from the analysis of plagioclase from three geographically distinct but geochemically comparable dolerite dykes from the eastern part of Varanger Peninsula, northern Norway, show similar features ... -
Environmental investigation of two stations from the Snorre Field, Tampen area, 1996
(NGU-Rapport (97.009), Report, 1997)Cores from two stations in the Tampen area, in the Norwegian Trench west of Florø, have been analysed (geochemistry, sedimentology, physical properties) and dated (210Pb-dating). One station was located 1000 m downstream, ... -
From Archaean to Proterozoic on Hardangervidda, south Norway
(NGU Bulletin (433), Journal article, 1997) -
Geochemistry and Rb-Sr dating of trondhjemite dykes from the Gula Group, near Snøan, Sør-Trøndelag.
(NGU-Rapport (96.163), Report, 1996)Trondhjemite dykes forming part of a swarm cutting the Gula Group metasedimentsand tectonically overlying Støren Group metabasalts in the district south ofStøren, Sør-Trøndelag, have been investigated in road-cuts in the ... -
Geochemistry and Rb-Sr isochron age of trondhjemite dykes from the Gula Complex, near Snøan, Central Norway.
(NGU Bulletin (437), Journal article, 2000)Trondhjemite dykes trending c.ENE-WSW and transecting early metamorphic fabrics in rocks of the Gula Complex south-southwest of Støren, are themselves weakly metamorphosed and foliate. Geochemical data show that the dykes ... -
Geologi og landskapsutvikling langs Gaula for lokaliteter knyttet til arkeologiske utgravinger
(NGU-Rapport (2018.022), Report, 2018)I forbindelse med NTNU Vitenskapsmuseets arkeologiske utgravninger i perioden 2015-2018 i Melhus kommune, Sør-Trøndelag, er det behov for mer kunnskap om hvordan området kan ha sett ut i forhistorisk tid. Rapporten er en ... -
Geological note: Age of the Hamningberg dolerite dyke, Varanger Peninsula, Finnmark: Devonian rather than Vendian - a revised enterpretation
(NGU Bulletin (451), Journal article, 2011)In an earlier geochronology paper in this same journal, discordant U-Pb ages on zircons from a dolerite dyke near Hamningberg, Varanger Peninsula, Finnmark, were interpreted to favour a Vendian (Ediacaran) age of intrusion ... -
Geology and structural evolution of the Precambrian rocks of the Oslofjord - Øyeren area, Southeast Norway.
(NGU Bulletin (398), Journal article, 1984)The area (1200 km\u00B2) described covers the northern part of a major thrust segment in the eastern subprovince of the Sveonorwegian orogenic belt along the southwestern margin of the Baltic Shield. The oldest rock unit ... -
Geology of the southern part of the Kautokeino Greenstone Belt: Rb-Sr geochronology and geochemistry of associated gneisses and late intrusions.
(NGU Bulletin (403), Journal article, 1985)The southern part of the Kautokeino Greenstone Belt is divided into four volcanic formations separated by sedimentary units. The formation represent a development from Archaean komatiitic sequences to Middle Proterozoic ... -
Glacial geology,deglacition chronology and sea-level changes in the southern Telemark and Vestfold counties, Southeastern Norway
(NGU Bulletin (435), Journal article, 1999)A revised and more detailed deglaciation chronology is presented in the soputhern Telemark and Vestfold, southeastern Norway, based mainly on information and results from mapping projects on the superficial deposits carried ... -
Gol: Utvidelse av skredgeologisk kartleggingsarbeid
(NGU-Rapport (2017.011), Report, 2017)Denne rapporten beskriver arbeidet og resultatet av stratigrafiske undersøkelser og dateringer av skredavsetninger i det bebygde området Breidokk i Gol. Rapporten er et supplement til den kvartærgeologiske kartleggingen ... -
Implication of isotope data on the metamorphism of the basic volcanites from the Sjangeli Window, northern Sweden
(NGU Bulletin (415), Journal article, 1989)The Lower Proterozoic supracrustal rocks of the Sjangeli area form an approximately N-S striking belt. The supracrustal belt consists of three metamorphosed volcanic and volcanosedimentary units, which are intercalated ... -
Isotopic age determinations in South Norway: II. The problem of errorchron ages from Telemark rhyolites.
(NGU Bulletin (418), Journal article, 1990)Two sets of Telemark Supracrustal acid metavolcanics of the Rjukan Group were investigated by the Rb-Sr whole-rock method. Eleven smples within a sampling range of about 10 m were taken at Kvamsstøl at a distance of about ... -
Isotopic composition, deposition ages and environemnts of Central Norwegian Caledonian marbles
(NGU Bulletin (427), Journal article, 1995) -
Kentallenite (olovine-monzonite) in Bindal, Central Norwegian Caldonides.
(NGU Bulletin (413), Journal article, 1988)A rock-type identified as kentallenite is reported from the southwestern partof the Helgeland Nappe Complex, Central Norway. The kentallenite is ahypabyssal rock and belongs to a suite of appinitic mafic dykes and smallstocks ... -
Late Quaternary geological development of the Jutland Bank and the initiation of the Jutland Current, NE North Sea
(NGU Bulletin (430), Journal article, 1996)Using shallow seismic and core data, a reconstruction has been made of the Late Pleistocene-Early Holocene palaeogeography of Jutland Bank, NE North Sea. A division of Late Pleistocene and Holocene deposits into five ... -
Late Vendian U-Pb zircon age of a dolerite dyke from near Hamningberg, Varanger Peninsula - a preliminary report
(NGU-Rapport (96.162), Report, 1996)A dolerite dyke cutting very low-grade metasandstones of the Løkvikfjellet group near Hamningsberg, NE Varanger Peninsula, has yielded a U-Pb zircon age (upper intercept) of 554+20\/-14 Ma; and a lower intercept of c.375 ...