Blar i Artikler på emneord "RØNTGENFLUORESCENS"
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Age determinations from the Iveland-Evje area, Aust-Agder.
(NGU (300), Journal article, 1973)A Rb\/Sr isochron age determination on intrusive granite and monzonite from the Iveland-Evje area gave an age of 1038+- 43 m.y. Biotite from the granite dated by the K\/Ar method gave an age of 845+-60 m.y. These values ... -
Determination of major and trace elements in rocks employing optical emission spectroscopy and X-ray fluorescence.
(NGU (322), Journal article, 1975)An optical emission spectrometric method for major element determination and an X-ray fluorescence method for the determination of trace elements are described. The first method combines a tape machine with a direct reader ... -
Isotopic evidence on the age of the Trysil porphyries and granites in eastern Hedmark, Norway.
(NGU (266), Journal article, 1970)Rocks from the (sub-Jotnian) acidic plutonic and volcanic basement complexes in the Trysil area, eastern Hedmark, yield a Rb-Sr isochron age of 1541+-69 million years. This agrees within the limits of error with the isochrom ... -
Rb-Sr isochron age of Caledonian acid volcanics at Stord, western Norway.
(NGU (300), Journal article, 1973)An eight-point Rb-Sr whole-rock isochron from Caledonianrhyolites at Stord in western Norway defines an age of 455 +- 5 m.y.and an initial 87Sr\/86Sr of 0.7071 +- 0.00018. This places thevolcanism in the Upper Ordivicium, ...