Browsing NGU Open Archive by Author "Andriessen, P.A.M."
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Dating explosive volcanism perforating the Precambrian basement in southern Norway.
Andriessen, P.A.M.; Boelrijk, N.A.I.M.; Hebeda, E.H.; Verschure, R.H.; Priem, H.N.A.; Verdurmen, E.A.Th.; Maijer, C. (NGU (380), Journal article, 1983)K-Ar and Rb-Sr dating have been performed on various hypabyssal diatreme-facies volcanic rocks perforating the Sveconorwegian zone of the Precambrian basement in southern Norway. The dated rocks were taken from the Fen ... -
Isotope geochronology in the high-grade metamorphic Precambrian of southwestern Norway: new data and reinterpretation.
Wielens, J.B.W.; Verschure, R.H.; Verdurmen, E.A.Th.; Priem, H.N.A.; Hebeda, E.H.; Boelrijk, N.A.I.M.; Andriessen, P.A.M. (NGU (359), Journal article, 1980)A new series of isotopic age data is reported from the high-grade metamorphic Precambrian in S.W. Norway, mainly from the Sirdal-Ørsdal area. U-Pb investigations on suites of zircons from three augen gneisses and a pyroxene ... -
Isotopic age determinations in South Norway: II. The problem of errorchron ages from Telemark rhyolites.
Maijer, C.; Verschure, R.H.; Andriessen, P.A.M. (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 ...