Browsing NGU-publikasjoner by Subject "ISOTOP"
Now showing items 1-20 of 20
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A note on the sulphur composition of chalcopyrite and pyrrhotite from the Moskogaissa mines, Birtavarre, Troms.
(NGU (203), Journal article, 1958)Under et besøk i Oslo sommeren 1956 var prof. A.M. Bateman (Yale Univ., USA) så vennlig a tilby å gjøre en bestemmelse av det stabile svovelisotop-forholdet i prøver fra Birtavarre. Håpet var at en slik bestemmelse kanskje ... -
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 ... -
Baryttleging i Finnmark. S- og Sr-isotop undersøkelser i Trollfjord- dalen, Varangerhalvøya.
(NGU-Rapport (88.160), Report, 1988)Svovelisotop analyser er gjort på prøver av barytt i bergartsprøver og vaskepanneprøver. Sammenfallende S-isotop verdier viser at barytt i bekke- sedimentene er erosjonsprodukter av påviste baryttmineraliseringer i fast ... -
Baryttleting i Finnmark. Feltrapport for 1987 fra Trollfjorddalen, Varangerhalvøya.
(NGU-Rapport (87.163), Report, 1987)Kjerneboring gjennom en baryttmineralisert forkastning og geologiske under- søkelser i fortsettelsen av denne forkastningen er gjort. I tillegg er svovel- isotop sammensetningen i barytt og svovelkis diskutert. Det var ... -
Baryttleting i Finnmark. Geologiske og geokjemiske undersøkelser utført i 1986 i Trollfjorddalen, Varangerhalvøya.
(NGU-Rapport (87.067), Report, 1987)Geologisk og geokjemisk feltmateriale innsamlet i Trollfjorddalen i 1986 er undersøkt. Arbeidet har bestått av mineralogiske undersøkelser, kjemiske analyser og S-isotop analyser. Små mengder barytt er påvist som matriks ... -
Caledonian granitoids in the Frøya-Froan area, central Norway.
(NGU Bulletin (427), Journal article, 1995) -
Carbonate rocks of Karelia: geochemistry and carbon-oxygen isotope systematics in the Jatulian stratotype and potential for magnesite deposits
(NGU-Rapport (96.086), Report, 1996)Closely spaced samples (73 in number) of shallow water, red, stromatolitic dolomite and magnesite from the Palaeoproterozoic (1980 +-27 Ma as a minimum age) Tulomozerskaya Formation in a distal portion of the Onega ... -
Carbonate rocks of the Tverrvika area, Beiarn: potential for white calcite marbles, chemistry, isotope geochemistry and age.
(NGU-Rapport (99.032), Report, 1999)Marbles at Beiarn are a part of the Sokumfjell Group belonging to the Beiarn Nappe Complex in the Uppermost Allochthon of the Nordland Caledonides. The Sokumfjell Group marbles have been subjected to several phases of ... -
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; ... -
Isotopic composition, deposition ages and environemnts of Central Norwegian Caledonian marbles
(NGU Bulletin (427), Journal article, 1995) -
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 ... -
Lead isotope determinations by inductively-coupled plasma mass spectrometry (ICP-MS): potential of sector field instruments
(NGU Bulletin (436), Journal article, 2000)Lead isotope measurements have been carried out using a high-resolution inductively-coupled plasma mass spectrometry (Finnigan MAT ELEMENT, configurated with CD-1 option) The method can be applied to all types of geological ... -
NGU GEOCHRON: Database and analysis package for Norwegian isotope geochronology
(NGU-Rapport (98.003), Report, 1998)Isotope geochronologic data analysis is an integral aspect of nearly every type of tectonic study. However, no regional compilation of Norwegian geo- chronologic data has been assembled since 1986 (Kullerud and co-workers ... -
Petrology and isotope geology of the Hunnedalen Monzonoritic Dyke Swarm, SW Norway: a possible late expression of Egersund Anorthosite magmatism
(NGU Bulletin (434), Journal article, 1998)The widest and northernmost dyke of the post-tectonic Late Proterozoic Hunnedalen Monzonoritic Dyke Swarm has been studied petrographically, chemically (major and trace element) and isotopically (Rb-Sr; Sm-Nd; K-Ar) toghether ... -
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, ... -
Strontium isotope composition of the Bindal Batholith, Central Norwegian Caledonides
(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. ... -
Sulphur isotope composition of the sandstone-lead deposits in southern Norway.
(NGU (380), Journal article, 1983)Samples of galena, pyrite and barite from the Norwegian sandstone-lead occurences in the Gjøvik area and at Osen and Galåa have been analyzed for their sulphur isotope composition. Samples from the Vassbo and Laisvall ... -
The Eurogeosurveys geochemical mapping of agricultural and grazing land soils project (GEMAS) - Evaluation of quality control results of particle size estimation by MIR prediction, Pb-isotope and MMI-extraction analysis
(NGU-Rapport (2012.051), Report, 2012)Rigorous quality control (QC) is one of the keystones to the success of any regional geochemical mapping programme. For the EuroGeoSurveys (EGS) GEMAS (Geochemical mapping of agricultural and grazing land soils) project ... -
The Oslo paleorift - A review and guide to excursions. Isotop- and trace-element chemistry, geochronology.
(NGU (337), Journal article, 1978) -
Årstidsvariasjoner i grunnvannskjemien i fem bergborede brønner sør for Bergen
(NGU-Rapport (2001.041), Report, 2012)Fern borebrønner i berg i området Lysefjorden \/ Fanafjorden ble prøvetatt hver 14. dag gjennom et helt år fra oktober 1998 til oktober 1999. Grunnvannsprøvene ble analysert for radon, pH, alkalitet, turbiditet, farge, 7 ...