Blar i NGU-publikasjoner på emneord "DATERING"
Viser treff 1-20 av 93
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3rd Slope Tectonics Conference - Field excursion guide
(NGU-Rapport (2014.031), Report, 2014)The field trip of the 3rd Slope Tectonics conference visits areas of past rock slope failures and present-day unstable rock slopes and aims to discuss the structural and geological conditions of these sites, the morphologies ... -
40Ar-39Ar analyses of pyroxenes from dolerite dykes from southeastern Varanger Peninsula, Finnmark
(NGU-Rapport (95.158), Report, 1995)Pyroxene separates from two dolerite dykes from eastern Varanger Peninsula (at Komagnes and on the island St.Ekkerøya) have been analysed by the 40Ar- 39Ar method. The Komagnes dykes shows steps converging on a 'plateau' ... -
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 new Rb-Sr isotopic parameter for metasomatism, At, and its application in study of pluri-fenitized gneisses around the Fen ring complex.
(NGU Bulletin (445), Journal article, 2005)Emplacement of the Fen peralkaline-carbonatitic ring complex 583 Ma ago in the c. 1105 Ma old Telemark gneisses caused mineralogical, chemical and Sr-isotopic changes, i.e., fenitization, in the country rocks. Fenitization ... -
A possible basement to the Mesoproterozoic quartzites on Hardangervidda, South-Central Norway: zircon U-Pb geochronology of a migmatitic gneiss
(NGU Bulletin (437), Journal article, 2000)On Hardangrvidda west of the Mandal-Ustaoset fault zone in South Norway, some 80-90% of the crust consists of orthogneisses and foliated and massive granites in this plutonic environment the Mesoproterozoic quartzites of ... -
A proposed deglaciation chronology for the Trondheimsfjord area, Central Norway.
(NGU (373), Journal article, 1982)Radiocarbon datings of the deglaciation of the Trondheimsfjord area strongly suggest that the coastal areas and the outer part of the fjord were deglaciated before 11000 B.P. During early Younger Dryas the inland ice ... -
A Rb-Sr investigation of illite-forming events in diagenesis-grade Neoproterozoic shales, Varanger Peninsula, North Norway
(NGU-Rapport (96.154), Report, 1996)In this report we present evidence for the occurrence of at least two generation of authigenic illite in diagenesis-grade Upper Riphean and Vendian shales of the Stangenes, Nyborg and Stappogiedde Formations, Varanger ... -
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 ... -
Age and location of late Bølling - early Allerød ice-marginal substages in Mid-Norway - Outer Coast and Tingvoll, based on mapping and a compilation of 14C dates
(NGU-Rapport (2020.010), Report, 2020)The Outer Coast (OC)-Tingvoll ice margins in Mid Norway do not show continuous lines of ice marginal deposits (moraines, ice contact deltas, etc.) (Fig. 1), they appear rather as discontinuous lines of correlated deposits ... -
Age of the Krossnes Granite, West Norway
(NGU Bulletin (413), Journal article, 1988)Rb-Sr isotope whole-rock dating of the Krossnes Granite has yielded an isochron age of 430 \u00B1 6 Ma with I.R. = 0.07066 \u00B1 0.0005, interpreted as the age of intrusion. This age is close to that of the Håkre Granite ... -
Age of the Younger Dryas ice-marginal substages in Mid-Norway - Tautra and Hoklingen, based on a compilation of 14C-dates
(NGU Bulletin (454), Journal article, 2015)The ice-marginal Tautra and Hoklingen Substages in the Trøndelag counties, Mid-Norway, have for a long time been referred to as of early and late Younger Dryas (YD) age, respectively. The basis for this is the regional ... -
Befaring av skjæringer for ny E6 ved Klett, Trondheim
(NGU-Rapport (2017.001), Report, 2017)I forbindelse med vegbygging langs E6 sør for Trondheim er det noen steder laget 4-7 m dype skjæringer i løsmassene. Rapporten dokumenterer informasjon samlet inn under befaringer som ble gjort av NGU i leirskjæringene ved ... -
Benthic foraminiferal evidence of environmental change in the Skagerrak over the past six decades
(NGU Bulletin (430), Journal article, 1996)High resolution analyses of fossil benthic forminiferal assemblages have been performed on two short (<40cm) sediment cores from the deep Skagerrak Basin, NE North Sea. 210 Pb-datings of replicate cores from the same two ... -
Berggrunnskart Bamble - Kragerø M 1:50 000
(Map, 2020) -
Berggrunnskart Magerøysundet 2036-1, M 1:50 000
(Map, 2022) -
Berggrunnskartlegging i Ternholmfjorden, Stabbfjorden og Valværfjorden, Nordland : Sedimentære bergarter og strukturelle forhold
(NGU-Rapport (2003.004), Report, 2003)Sommeren 2002 urførte NGU refleksjonsseismisk kartlegging i Ternholmfjorden, Stabbfjorden og Valværfjorden i Meløy kommune, Nordland. Formålet med undersøkelsene var å foreta en videre kartlegging av forkastningsmønster ... -
Caledonian and Baikalian tectonic structures on Varanger Peninsula, Finnmark, Norway, and coastal areas of Kola Peninsula, NW Russia
(NGU Bulletin (431), Journal article, 1996)Based on data compiled from biostratigraphy, radiometric dating and palaeomag- netic studies, contractional deformation and low-grade metamorphism in the Neo- proterozoic to earliest Palaeozoic successions of coastal areas ... -
Carbonate rocks of the Tverrvika area, Beiarn: potential for white calcite marbles, chemistry, isotope geochemistry and age.
(NGU-Rapport (99.032), Report, 1999)Marbles at Beiarn are a part of the Sokumfjell Group belonging to the Beiarn Nappe Complex in the Uppermost Allochthon of the Nordland Caledonides. The Sokumfjell Group marbles have been subjected to several phases of ... -
Carbonate sand deposition along the coast of southern Norway
(NGU Bulletin (427), Journal article, 1995) -
Chemical (U-Th-Pb) dating of monazite: Analytical protocol for a LEO 1450VP scanning electron microscope and examples from Rogaland and Finnmark, Norway
(NGU Bulletin (446), Journal article, 2006)Monazite is a common accessory mineral and is a valuable mineral chronometer on account of its relatively high U and Th contents, negligible common Pb, and a high closure temperature. Because all the Pb present in monazite ...