Blar i NGU Open Archive på forfatter "Sundvoll, Bjørn"
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A likely Early Ordovician age for the regional penetrative cleavage in the Gaissa Nappe Complex.
Sundvoll, Bjørn; Roberts, David (NGU Bulletin (441), Journal article, 2003)Pervasively cleaved mudstones and claystones from two different parts of the Gaissa Nappe Complex in Finnmark wre subjected to Rb-Sr whole-rock analytical investigation. Although neither of the two groups of samples yielded ... -
A probable Permian hydrothermal alteration age for a quartz syenite dyke from Stabben, Nordmøre.
Sturt, Brian A.; Sundvoll, Bjørn; Askvik, Helge (NGU Bulletin (432), Journal article, 1997)A Rb-Sr whole-rock isochron from a quartz-syenite dyke at Stabben, Nordmøre, has provided an age of 263 +- 6Ma. This could be taken to indicate a crystallisation age for the dyke, i.e. Early Permian. The age, however, does ... -
Caledonian granitoids in the Frøya-Froan area, central Norway.
Nordgulen, Øystein; Sundvoll, Bjørn; Solli, Arne (NGU Bulletin (427), Journal article, 1995) -
Geochemistry and Rb-Sr dating of trondhjemite dykes from the Gula Group, near Snøan, Sør-Trøndelag.
Roberts, David; Sundvoll, Bjørn (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.
Sundvoll, Bjørn; Roberts, David (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 ... -
Geologiske undersøkingar på Frøya og Froøyane.
Nordgulen, Øystein; Sundvoll, Bjørn; Bøe, Reidulv; Solli, Arne (NGU-Rapport (90.073), Report, 1990)Kartlegging på Frøya og Froøyane har vist at berggrunnen for det meste er samansatt av kaledonske intrusivar som i nokre område innheld xenolittar av metasedimentere bergarter med ukjend alder. På Frøya og i ein del område ... -
Isotopic composition, deposition ages and environemnts of Central Norwegian Caledonian marbles
Sundvoll, Bjørn; Trønnes, Reidar G. (NGU Bulletin (427), Journal article, 1995) -
Oslo. Berggrunnskart Oslo M 1:250 000; trykt i farger
Sundvoll, Bjørn; Berthelsen, Asger; Olerud, Svein; Sigmond, Ellen M.O. (Map, 1996)Beskrivelsen finnes på kartet. -
Rb-Sr dating of cleaved mudstones from eastern and western parts of the Gaissa Nappe Complex, Finnmark
Roberts, David; Sundvoll, Bjørn (NGU-Rapport (2002.110), Report, 2002)Samples of pervasively cleaved mudstones and claystones from two different parts of the Gaissa Nappe Complex in Finnmark were subjected to Rb-Sr analytical investigation with the aim of trying to dtermine the metamorphic ... -
Rb-Sr isotope systematics in the magmatic rocks of the Oslo rift.
Sundvoll, Bjørn; Larsen, Bjørn, T. (NGU Bulletin (418), Journal article, 1990)Fifty-one different units of Oslo Rift magmatic rocks have been investigated by the Rb-Sr isotope method. Isochron ages obtained for all but three of the units vary between 295 Ma and 240 Ma. The ages from the southern ... -
Strontium isotope composition of the Bindal Batholith, Central Norwegian Caledonides
Nordgulen, Øystein; Sundvoll, Bjørn (NGU Bulletin (423), Journal article, 1992)Forkortet: A strontium isotope study of the Bindal Batholith has been carried out. The data generally do not permit precise and accurate age calculations; however, good estimates for initial Sr ratios are commonly obtained. ... -
The Oslo paleorift - A review and guide to excursions. Isotop- and trace-element chemistry, geochronology.
Sundvoll, Bjørn (NGU (337), Journal article, 1978) -
U-Pb geochronology and geochemistry of trondhjemites and norite pluton from the SW Trondheim Region, Central Norwegian Caledonides
Nilsen, Odd; Corfu, Fernando; Roberts, David; Sundvoll, Bjørn (NGU Bulletin (441), Journal article, 2003)Zircon analyses from two trondhjemites and a biotite norite from a part of the southwestern Trondheim Region have yielded almost identical Early Silurian ages. The biotite norite and one of the trondhjemites, from a quarry ...