Blar i NGU Open Archive på emneord "PETROGRAFI"
Viser treff 1-20 av 385
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A fluidization breccia in granite at Skaget, Svellingen, Frøya.
(NGU (380), Journal article, 1983)The breccia consists of fragmented and comminuted host rock material and small amounts of hydrothermal quartz, epidote, laumontite, ?stilbite, calcite and montmorillonite. At least three brecciation and mineralization ... -
A likely Early Ordovician age for the regional penetrative cleavage in the Gaissa Nappe Complex.
(NGU Bulletin (441), Journal article, 2003)Pervasively cleaved mudstones and claystones from two different parts of the Gaissa Nappe Complex in Finnmark wre subjected to Rb-Sr whole-rock analytical investigation. Although neither of the two groups of samples yielded ... -
A petrographical and structural study of the rocks around the Peridotite at Engenbræ, Holandsfjord, Northern Norway. Bjergartene omkring peridotiten ved Engenbræen, Holandsfjord.
(NGU (191), Journal article, 1955)This study is a continuation of the work carried out by S. Skjeseth and the writer in 1952. The present paper only deals with an extremely well-exposed surface 1 km square in front of the retreating Engenbræ glacier. This ... -
A post-Caledonian ultrabasic biotite lamprophyre dyke of the island Ytterøy in Trondheimsfjord, Norway.
(NGU (215), Journal article, 1962)A lamprophyre having pronounced alnøitic - kimberlitic affinities is described. It is suggested that the intrusion of the dyke is connected with Permian rift faulting. -
A preliminary account of the geochemistry and ore mineral parageneses of some Caledonian basic igneous rocks from Sørøy, northern Norway.
(NGU (234), Journal article, 1965)The intrusion of the Storelv and Breivikbotn gabbros into metasediments on the island of Sørøy took place during the late stages of the first phase of Caledonian folding (F1). Both gabbros were then affected by almandine ... -
A preliminary account of the geology of the Signaldalen-Upper Skibotndalen area, Inner Troms, N. Norway.
(NGU (247), Journal article, 1967)A preliminary account of the petrography, stratigraphy and structure of an area at the Caledonian front in inner Troms, N. Norway, is given. Precambrian autochthonous gneisses are overlain by autochthonous and par-autochthonous ... -
A preliminary note on the geology of the area between Altevatn and Målselv, Indre Troms, N. Norway.
(NGU (247), Journal article, 1967)An area of approx. 1,600 square kilometres in Indre Troms, N. Norway, has been geologically mapped. The area is built up of 1)granites and migmatites of the basement, overlain by 2)non-metamorphic sediments of the Hyolithus ... -
A rift-related mafic dyke swarm in the Corrovarre Nappe of the Caledonian Middle Allochthon, Troms, North Norway, and its tectonometamorphic evolution
(NGU Bulletin (419), Journal article, 1990)Forkortet. The Corrovarre Nappe is the highest tectonic unit of the Kalak Nappe Complex, in the Caledonian Allochthon, in the Nordreisa area of Troms, North Norway. The nappe consists of meta-arkoses, metapellites and ... -
A section across the Norwegian Caledonides; Bodø to Sulitjelma.
(NGU (260), Journal article, 1969)Between coastal regions near Bodø and the relatively well-known Sulitjelma area on the Norwegian-Swedish border a number of metasedimentary sstructural units have been distinguished lying above an apparently region-wide ... -
Adamsfjord og Ul'lugai'sa. Beskrivelse til de berggrunngeologiske kart 2135 I og 2135 II - M 1:50 000 (med fargetrykt kart).
(NGU; Skrifter (381; 40), Journal article, 1983)Descriptions are presented of the different rock-types occurring in either autochthonous or allochthonous position within the confines of these two map-sheets. Five principal geological or tectonostratigraphical elements ... -
Age and petrogenesis of the Tinn granite, Telemark, South Norway, and its geochemical relationship to metarhyolite of the Rjukan Group.
(NGU Bulletin (440), Journal article, 2002)The Tinn granite is a Mid Proterozoic, foliated pluton, situated in the central part of the Telemark Sector, South Norway. It is spatially associated with metarhyolite belonging to the Tuddal Formation of the Rjukan Group ... -
Albittrike bergarter i den karelske fjellkjede på Finnmarksvidda, Nord-Norge.
(NGU (203), Journal article, 1958)Greenschists and alternating, smaller beds of graphite schists, felsites, together with intrusive rokcs of diabase and granitoid character, all belonging to the Karelidic orogeny, show strong enrichment of albite. Chemical ... -
Almenfattelig forklaring af kartet og af endel i det foregaaende anvendte geologiske udtryk
(NGU (4), Journal article, 1891) -
Alta og Gargia. Beskrivelse til de berggrunnsgeologiske kart 1834 I og 1934 IV - M 1 : 50 000.
(NGU; Skrifter (357; 32), Journal article, 1980)General descriptions of the different metasedimentary, metavolcanic and igneous rocks occurring within the area of the two map-sheets are presented. Three principal map-subdivisions are recognized: (a) a Precambrian (supposed ... -
An example of granitization in the central zone of the Caledonides of Northern Norway. Et eksempel på granittisering i den sentrale sonen av Kaledonidene i Nord-Norge.
(NGU (184), Journal article, 1953)A brief outline of the geology of the Holandsfjord area is given and the structural evolution and the granitization processes are discussed. It is concluded that the large masses of granite overlying the paragneisses may ... -
An outline of the geology of the Lyngen peninsula, Troms, Norway. (Abstract)
(NGU (269), Journal article, 1971) -
Andøens kulfeldt
(NGU (36), Journal article, 1902)Forkortet: The Andøy Coal field lies on the Eastern side of the isle of Andøy in Northern Norway (70\u00B0N). A sketch map of the northern part of this isle is found on p.28, where the coal-field is shaded. The diagram om ... -
Arbeider som Brit Hofseth ikke hadde ferdig bearbeidet, angående Holleia og gabbrofeltene i Troms petrografisk bearbeielse.
(NGU (157), Journal article, 1942) -
Aurdal. Beskrivelse til det geologiske gradteigskart.
(NGU (185), Journal article, 1954)The gneisses of the area can be divided into two distinct groups, plagioclase gneisses of a quartzdioritic composition and granodioritic gneisses. In the stripe of Archean rocks along the valley of the Begna there is a ... -
Bemærkninger om oversiluren i Brumunddalen
(NGU (37), Journal article, 1904)Forkortet: The author can not agree in some points of the description of the Upper Silurian in Brumunddalen, which Mr.K.O.Bjørlykke has published in \"Norges geologiske undersøkelses Årbok\" (1904 No.2). I. The graptolitic ...