Blar i Artikler på emneord "OMDANNING"
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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 ... -
Polyphase Caledonian metamorphism in the Precambrian basement of Rogaland/Vest-Agder, SW Norway.
(NGU (380), Journal article, 1983)In the Sveconorwegian basement of Rogaland\/Vest-Agder, SW Norway, two incipient Caledonian metamorphic overprints are assumed on the basis of petrological textures and regional extension of the metamorphic mineral ... -
Precambrian and Caledonian tectonometamorphic evolution of Northeastern Seiland, Finnmark, North Norway.
(NGU (373), Journal article, 1982)The metamorphic rocks of northeastern Seiland are predominantly Precambrian gneisses and schists. The Fagervik infracrustal complex, composed of tonalitic gneisses, constitutes a basement to the Late Precambrian-Cambrian ... -
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 ... -
Rutile in eclogites as a mineral resource in the Sunnfjord Region, Western Norway.
(NGU Bulletin (436), Journal article, 2000)The world's resources of the primary titanium raw materials ilmenite and rutile are very large. However, there is a lack of high-grade, high-quality ilmenite deposits as well as good rutile deposits. Particular focus has ... -
Sedimentary, tectonic and metamorphic features of the Devonian of Røragen, Sør-Trøndelag.
(NGU (311), Journal article, 1974)An outline is given of the depositional environment of these Lower Devonian rocks following the discovery of various primary sedimentary structures which have provided some evidence of palaeocurrent directions. Tectonic ... -
Structural history of the Bygdin area, Oppland.
(NGU (247), Journal article, 1967)The tectonic history of the area, which is part of the marginal thrust zone of the Norwegian Caledonides, is described. Within the area, the Upper Jotun Nappe has been thrust over the Valdres Sparagmite and the Bygdin ... -
Structure and petrology of the Bergen-Jotun kindred rocks from the Gjendebu region, Jotunheimen, Central Southern Norway.
(NGU (373), Journal article, 1982)The Gjendebu region is located within the Jotun Nappe, highest tectonic unit of the southern Norwegian Caledonides. The structure of the area is dominated by the NE-rending Tyin-Gjende Fault, a major zone of repeated ... -
Structures and metamorphism at Brygfjell-Simafjell within the Rødingsfjellet Nappe Complex, Nordland, Norway
(NGU Bulletin (431), Journal article, 1996)Structures and metamorphic featues are described from parts of the area of 1:50 000 map-sheet Korgen. The area investigated is situated within the Rødings- fjellet Nappe Complex in the Caledonides of Nordland. The rocks ... -
Structures and ore genesis of the Grimsdalen deposits, southern Trondheim region, Norway.
(NGU (351), Journal article, 1979)The central part of the Grimsdalen area of the southern Trondheim region is occupied by a sequence of metavolcanics with subordinate metasediments, termed the Folla Group, which are correlated with the Støren Group of the ... -
The basal gneisses and basement contact of the Hestbrepiggen area, North Jotunheimen, Norway.
(NGU (252), Journal article, 1968)Pethographic, modal, chemical, X-ray and structural studies have been made on rocks from a mapped area of Basal Gneisses and Basement contact in a glaciated region in the North Jotunheim mountains. Precambrian Basal Gneisses ... -
The Caledonian fold belt i Finnmark
(NGU Bulletin (403), Journal article, 1985)Forkortet. The Caledonian allochthon in Finnmark embraces 4 major nappes or nappe complexes named, from bottom to top, the Gaissa, Laksefjord, Kalak and Magerøy. Of these the 3 lower nappe complexes acquired their internal ... -
The Caledonian mountain chain of the Southern Troms and Ofoten areas. Part I. Basement rocks and Caledonain meta-sediments.
(NGU (239), Journal article, 1966)The geology of the present area will be treated in a series ofthree publications. In the first paper the petrography and generalfeatures of the Precambrian rocks and the so-called \"basal gneisses\"are described and the ... -
The Caledonian Mountain Chain of the Southern Troms and Ofoten areas. Part II. Caledonian rocks of igneous origin.
(NGU (261), Journal article, 1969)Metamorphosed rocks of igneous origin are described fromCaledonian part of the Southern Troms and Ofoten areas. Based onmegascopic and microscopic appearance, on chemistry and on fieldrelations they can be divided into two ... -
The early major structure and petrology of rocks in the Bamble Series, Søndeled-Sandnesfjord, Aust-Agder.
(NGU (327), Journal article, 1976)The geology and major fold structures of part of the Bamble Series are described from an area near Risør, Aust-Agder (some 15 km SW of the Levang paragneiss dome). Major structures are shown to have formed prior to the ... -
The geology of the Gjersvik area, Nord-Trøndelag, central Norway.
(NGU (354), Journal article, 1979)The Gjersvik area consist of low-grade metamorphic rocks overlain in the west by the higher grade Helgeland Complex. The low-grade sequence is divided into three groups: the Gjersvik, the Limingen and the Røyrvik Groups. ... -
The geology of the Sorjusdalen area, Nordland, Norway.
(NGU (351), Journal article, 1979)The rocks of the Sorjusdalen area are divided into two distinct tectono-stratigraphic sequences, the lower termed the Pieske\/Vasten Nappe and the upper the Gasak Nappe. The mutual contact of the nappes is imbricate in ... -
The geology, exploration and characterisation of graphite deposits in the Jennestad area, Vesterålen, northern Norway
(NGU Bulletin (436), Journal article, 2000)This paper reviews graphite exploration in the Jennestad area, Nordland. As a result of helicopter aeromagnetic surveying and subsequent ground geophysics mapping and trenching, some 30, variously sized bodies of graphite ... -
The low-grade rocks of the Skålvær area, S. Helgeland, and their relationship to high-grade rocks of the Helgeland Nappe Complex.
(NGU (322), Journal article, 1975)The geological setting of low-grade rocks of the Helgeland Nappe Complex are discussed and it is concluded that the low-grade rocks are part of the nappe complex. Correlation with similar low-grade sequences in (1) the ... -
The Moyale graphite deposit, Southern Ethiopia
(NGU Bulletin (436), Journal article, 2000)Precambrian metamorphic rocks of southern Ethiopia, belonging to the Pan-African (Mozambique Belt), host the Moyale graphite deposit. The principal rock units are amphibole schists, quartz-feldspar-mica schists, granodiorites, ...