Blar i Artikler på emneord "GEOKJEMI"
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Komatiitic Chlorite-amphibole rocks and mafic metavolcanics from the Karasjok greenstone belt, Finnmark, northern Norway: a preliminary report.
(NGU (382), Journal article, 1983)A general account is presented of the field relationships, geochemistry and petrology of mafic and ultramafic metavolcanics within the Precambrian Karasjok greenstone belt. These metavolcanic rocks make up the major part ... -
Major element geochemistry of Neoproterozoic successions of Varanger Pensinsula, North Norway, and Sredni and Rybachi Peninsulas, North- west Kola, Russia: provenance patterns and basin evolution
(NGU Bulletin (432), Journal article, 1997)Major element analyses of 461 samples of Neoproterozoic sedimentary rocks were classified by using petrochemical plots and statistically treated in cluster analyses. In general, the studied siliciclastic rocks represent ... -
Marginal basin type metavolcanites of the Hersjø Formation, eastern Trondheim District, Central Norwegian Caledonides.
(NGU Bulletin (412), Journal article, 1988)Forkortet.The more than 300 km long greenstone belt of the eastern Trondheim districtin the Caledonian Upper Allochthon displays considerable heterogeneity inlithology as well as metavolcanite geochemistry. A largely ... -
Petrology and geochemistry of high-grade metamorphic and igneous rocks on Langøy, northern Norway.
(NGU (207), Journal article, 1960)The rocks on Langøy have been considered as representing an igneous rock series including metamorphic sedimentary rocks of \"Caledonian type\". The present work shows that they are for the most part high-grade metamorphic ... -
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 ... -
Petrology of the Grimstad granite II. Petrography, geochemistry, crystallography of alkali feldspars and genesis.
(NGU (265), Journal article, 1970)The Precambrian Grimstad granite, South Norway, has been studied by petrographical, chemical and x-ray crystallographical analysis. It has a semi-circular outline and is partly rimmed by an agmatite. Eight different rock ... -
Petrology, geochemistry and genesis of the type area trondhjemite in the Trondheim Region, Central Norwegian Caledonides.
(NGU (351), Journal article, 1979)Trondhjemite from the Follstad district of the Trondheim region is present within allochthonous Lower Paleozoic eugenosynclinal and partly miogeosynclinal rocks of the Caledonide orogen. Four periods of trondhjemite intrusive ... -
Preliminary investigations of some Ordovician volcanics from Stord, West Norway.
(NGU (327), Journal article, 1976)Later Ordovician volcanics on Stord, W. Norway, comprise alkaline rhyolite flows and ignimbrites, and ferro-basalt (icelandite) and basaltic andesite lavas. The latter are hy-normative, \"evolved\" rocks rich in residual ... -
Provenance and sediment routing of Neoproterozoic formations on the Varanger, Nordkinn, Rybachi and Sredni peninsulas, North Norway and Northwest Russia: a review
(NGU Bulletin (452), Journal article, 2012)Provenances and sediment routing of Neoproterozoic, mainly low-grade, sedimentary successions on four large peninsulas in Northeast Norway (Varanger and Nordkinn) and Northwest Russia (Rybachi and Sredni) have been assessed ... -
Subduction-related volcanism in the Gula Nappe, southeastern Trondheim Nappe Complex, Central Norway
(NGU Bulletin (428), Journal article, 1995)Field and geochemical evidence from two meta-igneous complexes that occur in the Einunnfjellet-Savalen area, southeastern Trondheim Nappe Complex, indicates that both complexes formes in an arc-related setting. Metabasalts ... -
The alkaline complex of the Breivikbotn area, Sørøy, Northern Norway.
(NGU (231), Journal article, 1965)The alkaline rocks of the Breivikbotn area have been emplaced into highly folded and metamorphosed igneous and sedimentary rocks during the period of the Caledonian orogeny. They form an integral part of the complicated ... -
The Resfjell ophiolite fragment, southwest Trondheim region, central Norwegian Caledonides
(NGU Bulletin (409), Journal article, 1987)The Resfjell Complex of Meldal, southwestern Trondheim region, provides an almost ideal crosssection through the uppermost part of an ophiolite. The stratigraphically lowest rocks exposed are metagabbro wich are followed ... -
U-Pb geochronology and geochemistry of trondhjemites and norite pluton from the SW Trondheim Region, Central Norwegian Caledonides
(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 ... -
Urban geochemistry in Trondheim, Norway
(NGU Bulletin (438), Journal article, 2001)The chemical composition of urban surface soil in Trondheim, Norway, has been mapped to serve a two-fold purpose.\r1.) To assess whether stack-emissions from industrial sites, incinerators and crematoria as well as road ...