Blar i NGU Open Archive på emneord "GEOKRONOLOGI"
Viser treff 1-20 av 106
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A 40Ar/39Ar dating study of very low-grade metamorphism from the Rybachi and Sredni Peninsulas, NW Russia -a preliminary report
(NGU-Rapport (98.168), Report, 1998) -
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 Late Quaternary correlation chart for Norway.
(NGU (223), Journal article, 1963)A correlation chart is presented containing the stratigraphical results of some selected Norwegian studies in the wide field of Quaternary geology. Studies of plant remains in bogs, pollen investigations, evidence of ... -
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 structural, stratigraphic and petrologic study of anorthosites, eclogites and ultramafic rocks and their country rocks, Tafjord area, western South Norway.
(NGU (332), Journal article, 1977)The Tafjord area of the central basal gneiss region contains Caledonized metamorphic rocks divided into two groups. The 1000 m.y. old Fetvatn Geniss is a homogeneous zone of granodioritic gneiss that was intruded as part ... -
A tectonostratigraphic transect across the central Scandinavian Caledonides, Storlien - Trondheim - Lepsøy. Part II: Excursion guide in Norway.
(NGU-Rapport (2008.064), Others, 2010)This guidebook was prepared for the Norwegian part (seven days) of Excursion no. 34 ofthe 33\" IGC, Oslo, 2008, to give participants from outside the region as comprehensive a view as possible within 10 days of the ... -
A U-Pb zircon, Archaean age for granitoid rocks in the Kunes Nappe, Laksefjord Nappe Complex, Finnmark, North Norway
(NGU Bulletin (449), Journal article, 2009)Nappes in the middle parts of the Caledonian tectonostratigraphy in Finnmark, northern Norway, contain slices of granitoid basement that hitherto have not been reliably dated. Zircons extracted from two, high-K, calc-alkaline ... -
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 determination from the Trondheim Region Caledonides, Norway: a preliminary report.
(NGU (288), Journal article, 1973)Twenty-four potassium-argon age determinations have been made on metamorphic minerals and whole-rocks (phyllites) from the Caledonides of the Trondheim region, Norway. Nineteen of the apparent ages fall between 438 and 402 ... -
Age determination of Norwegian minerals up to March 1964.
(NGU (228), Journal article, 1964)A summary of absolute age determination of Norwegian minerals and rocks up to March 1964. Map of loclities, diagrams and analysis of the data. -
Age determinations from the Iveland-Evje area, Aust-Agder.
(NGU (300), Journal article, 1973)A Rb\/Sr isochron age determination on intrusive granite and monzonite from the Iveland-Evje area gave an age of 1038+- 43 m.y. Biotite from the granite dated by the K\/Ar method gave an age of 845+-60 m.y. These values ... -
Age of gneissic rocks in the Caledonian nappes of the Alta district, northern Norway
(NGU Bulletin (403), Journal article, 1985)Result of a Rb-Sr geochronological investigation are presented which confirm the Precambrian age of gneisses forming parts of the Skillefjord and Nalganas Nappes of the West Finnmark Caledonian allochthon. In the case of ... -
Aldersbestemmelse av dypbergarter etter Rb/Sr-metoden i den sørlige del av Bindalsmassivet, Nord-Trøndelag og Nordland, II.
(NGU-Rapport (88.005), Report, 1988)I to av de undersøkte bergartene er påvist følgende isokronaldere: 569 +\/- 23 Ma for porfyrgranitten, som utgjør store deler av Bindalmassivet og 493 +\/- 24 Ma for trondhjemittiske ganger i metasedimentene. Begge bergartene ... -
Aldersbestemmelse av mylonitter etter Rb-Sr metoden fra den basale skyvesonen til Kalakdekkekomplekset, Børselv, Finnmark.
(NGU-Rapport (89.166), Report, 1989)I Rb-Sr totalbergartsdatering av mylonitter fra bunnen av Kalakdekkekomplekset nær Børselv, Finnmark, har en påvist to adskilte isokronaldere. En av prøve- seriene, SR2, har gitt en isokronalder på ca. 480-475 Ma. En annen ... -
Aldersbestemmelse etter Rb/sr-metoden av dypbergarter i den sørlige del av Bindalsmassivet, Nord-Trøndelag og Nordland.
(NGU-Rapport (86.036), Report, 1986)Senere kartlegging i den sydøstlige del av Bindalsmassivet har vist at tonalitten og den finkornete granodioritten er syntektoniske intrusjoner. Ganger av finkornet granodioritt har gitt isokronaldere på 503 +-23 Ma for ... -
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 ... -
Berggrunnskart Lebesby 2136-2 M 1:50 000
(Map, 2019) -
Berggrunnskart Øksfjord 1835-3 M 1:50 000
(Map, 2018) -
Beskrivelse av faunaen.
(NGU (155), Journal article, 1940)The fauna here reported from Karmøy is from a light often micaceous calcareous sandstone, the fossils occurring as rusty impressions and casts, mostly deformed and indistinct. Corals and crinoid stems occur in greatest ... -
Byssonychia? sp. från Karmøy.
(NGU (155), Journal article, 1940)Material: Cast of bivlved specimen and some impressions of the exterior. Diagnosis: Equivalved, laterally very unsymmetrical, form elliptical, height greater than length. Margo cardinalis, the hinge line, straight, somewhat ...