Blar i Artikler på forfatter "Nissen, August L."
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En petrografisk-mineralogisk undersøkelse i området syd for Majavann, spesielt granaters sammensetning under regional metamorfose.
Nissen, August L. (NGU (234), Journal article, 1965)The investigated area is situated in the Norwegian Caledonian orogenic belt, south of Majavann (Nordland county). The main rock types are micagneisses and garnet-mica-schists, cristalline limestones, granodioritic-gneisses, ... -
Geochemical changes accompanying mylonitisation of granite at the base of the Helgeland Nappe Complex, Nord-Trøndelag, central Norway
Roberts, David; Nissen, August L. (NGU Bulletin (446), Journal article, 2006)A progressive conversion of megacrystic granite into mylonites at the base of the Helgeland Nappe Complex in the Caledonides of central Norway is reflected in microstructural, textural and modal changes. These mylonites ... -
Mosjøen. Beskrivelse til det berggrunnssgeologiske gradteigskart I 17 1 : 100 000.
Nissen, August L. (NGU; Skrifter (307; 12), Journal article, 1974)Description are given of the various lithologies occurring within the map area. These mainly comprise Cambro - Silurian supracrustals and intrusive, as well as granitic basement rocks of supposed Precambrian age. The ... -
Rb-Sr age of the Blåfjellhatten granite in the Olden Window, Central Norway.
Fossen, Haakon; Nissen, August L. (NGU Bulletin (420), Journal article, 1990)Rb-Sr isotope whole-rock dating of undeformed and unaltered parts of the Blåfjellhatten granite has yielded an isochron age of 1356 +- 29 Ma with I.R.=0.7254 +-0.0027, interpreted as the age of intrusion. This age contrasts ... -
U-Pb zircon ages of a tonalite and a granodiorite dykefrom the southeastern part of the Bindal Batholith,central Norwegian Caledonides
Roberts, David; Gromet, L. Peter; Nissen, August L. (NGU Bulletin (446), Journal article, 2006)An elongate tonalite pluton and a c.10 m-thick granodiorite body in the southeastern part of the Bindal Batholithand Helgeland Nappe Complex, Nord-Trøndelag, have yielded U-Pb zircon ages of 429 \u00B12 and 430 \u00B12 Ma, ...