Blar i Artikler på emneord "OMVANDLING"
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A probable Permian hydrothermal alteration age for a quartz syenite dyke from Stabben, Nordmøre.
(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 ... -
Fra Hardangervidden III
(NGU (34), Journal article, 1902)Forkortet: The border-lines on the southwestern and southern part of the map on p.29 are to be attributed to Mr.Bjørlykke, who had a very wild region to explore. His photo, reproduced on p.63, shows veins of granite in ... -
Geologiske og petrografiske undersøkelser i Modumfeltet.
(NGU (235), Journal article, 1966)Geological mapping of part of the Modum area, the northernmost part of the Kongsberg-Bamble area in the Precambrian of southern Norway, was carried out. The different rocks are described, and metasomatic processes which ... -
Granåsen, a dolomite-brucite deposit with potential for industrial development.
(NGU Bulletin (436), Journal article, 2000)Granåsen, situated close to Mosjøen in northern Norway, is a deposit containing several million tonnes of dolomite and brucite. The deposit has been investigated and characterised in preparation for future development and ... -
Industrial mineral quality of limestone; the effect of contact metemorphism on textural properties, brightness and geochemistry
(NGU Bulletin (436), Journal article, 2000)When carbonate are altered by contact metamorphism the industrial mineral quality of the rock can be affected. Based on two contrasting limnestone units from Oslo Rift, Norway, a study has been made of the impact that ... -
Metamorphic petrology of the Froland corundum-bearing rocks: the cooling and uplift history of the Bamble Sector, South Norway
(NGU Bulletin (424), Journal article, 1993)Corundum-bearing rocks from Kleggåsen, Froland, preserve metamorphic textures which reflect the cooling and uplift path of the Bamble Sector. The P-T path may be correlated with a T-t path constructed from published ages. ... -
Supergene alteration of Norwegian Sulphide deposits - a query.
(NGU (213), Journal article, 1961)Forfatteren diskuterer en tidligere avhandling av Bjørlykke som behandler spørsmålet om supergene anrikninger i norske kisforekomster. Bjørlykkes forslag er at anrikninger av kobber, utelukkende som kobberkis (kalkopyrit), ... -
Tectonic setting of the Tronfjell Massif ; further evidence for pre-Scandian orogenesis in the Trondheim Nappe Complex, Central Norway.
(NGU Bulletin (434), Journal article, 1998)The Tronfjell Massif consists of layered mafic intrusion, containing dunites and olivine-bearing to noritic gabbros, lying within metasedimentary rocks of the Hummelfjell Group. The initially more or less flat form of the ... -
The precambrian metamorphic rocks around the lake Vegår (Aust-Agder, southern Norway).
(NGU (257), Journal article, 1968)An area about 2000 km between the Skagerak coast (Tvedestrand - Risør) and the Southern part of the Telemark province (Tjønefoss - Neslandvatn) has been investigated and is considered to be a genetically homogenous migmatitic ... -
Velfjord. Beskrivelse til det berggrunnsgeologiske gradteigskart I 18 - 1:100 000.
(NGU; Skrifter (274; 1), Journal article, 1972)The various lithologies are described. These comprise granitic basements rocks of supposed Pre-Cambrian age and Cambro-Silurian supracrustals and intrusives. The intrusives are mostly found within the Bindal and Velfjord ...