Blar i Artikler på emneord "GEOKJEMI"
Viser treff 1-20 av 34
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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 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 ... -
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 ... -
Devonian lavas from Solund, West Norway - field relationships and geochemistry.
(NGU (382), Journal article, 1983)Devonian volcanic rocks in the Hersvik area, Solund, West Norway are represented by two lava flows occuring close to the base of the Devonian conglomerate. They are composed largely of highly flow-banded and brecciared ... -
Distribution of rock fragments, grain size and chemical elements of tills in the Lake Mjøsa area, eastern Norway
(NGU Bulletin (453), Journal article, 2014)The Lake Mjøsa area in eastern Norway forms an interesting case to study glacial erosion, transport and deposition because bedrock lithology (source of till) is relatively well known and the Geological Survey of Norway ... -
Dokka. Beskrivelse til kvartærgeologisk kart 1816 IV - M 1:50 000 (med fargetrykt kart).
(NGU; Skrifter (383; 41), Journal article, 1983)The superficial deposits and their morphological features within the map-sheet Dokka, 1816 IV, in central south-eastern Norway are classified and described. Ice movements and the course of deglaciation are reconstucted. ... -
Eisen-TitanlagerstÌtten bei Raudsand, Westnorwegen.
(NGU (234), Journal article, 1965)A number of magnetite-ilmenite deposits near Raudsand in western Norway are described. The orebodies lie in lenses and plates of amphibolite. These amphibolites are conformable within the surrounding late precambrian or ... -
Elvdal. Beskrivelse til kvartærgeologisk kart 2018 III - M 1:50 000 (med fargetrykt kart)
(NGU; Skrifter (346 ; 27), Journal article, 1979)The superficial deposits consists mainly of sandy basal till\r and gravelly-sandy ablation till. The glaciofluvial and fluvial\rsediments are mainly gravelly. The lithology of the fine gravel and the\r mineralogy of sand ... -
Geochemical changes accompanying mylonitisation of granite at the base of the Helgeland Nappe Complex, Nord-Trøndelag, central Norway
(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 ... -
Geochemical modelling of natural geo-/hydrochemical stratification dominated by pyrite ocidation and calcite dissolution in a glaciofluvial Quaternary deposit, Gardermoen, Norway.
(NGU Bulletin (434), Journal article, 1998)The PHREEQC geochemical model has been used to reproduce on a geological time scale an abrupt shift between an oxic and an anoxic zone, in the Gardermoen glaciofluvial delta deposit. Groundwater in the aquifer has a major ... -
Geochemistry and palaeogeographical setting of greenstone units on Frosta peninsula, Nord-Trøndelag, Central Norwegian Caledonides
(NGU Bulletin (450), Journal article, 2010)Volcanic and high-level intrusive rocks of the Støren Nappe exposed on the west coast of Frosta peninsula occur in two, distinct, magmatic units; the bimodal Fånes complex and the metabasaltic Granheim greenstone. North ... -
Geochemistry and petrogenesis of trondhjemites and granodiorite from Gauldalen, Central Norwegian Caledonides
(NGU Bulletin (437), Journal article, 2000)In the Gauldalen district of Central Norway, three varieties of trondhjemite cutting rocks of the Gula Complex have been distinguished on the basis of nuances of colour and field relationships. The high Al2O3, Rb and Sr, ... -
Geochemistry and petrology of dolerite dykes of probable late Caledonian age from the outer Sunnfjord region, West Norway.
(NGU (363), Journal article, 1981)Major and trace element abundances from dolerite dykes in the outer Sunnfjord region show an averall compositional similarity to continental tholeiites. The dyke rocks exhibit a fractionated nature, especially with respect ... -
Geochemistry and Rb-Sr dating of the Muruvik rhyolite tuff, Trondheimsfjord, Central Norway.
(NGU Bulletin (412), Journal article, 1988)A geochemical study of a low greenschist facies, felsic lapill-ash tuff fromnear the stratigraphic top of the Ordovician Lower Hovin Group at Muruvik,Trondheimsfjord, has shown that the pyroclastite is clearly calc-alkaline ... -
Geochemistry of dolerite and metadolerite dykes from Varanger Peninsula, Finnmark, North Norway.
(NGU (322), Journal article, 1975)Dolerite dykes provide the only manifestation of igneous activity in the thick, Riphean to Lower Cambrian, weakly metamorphosed sedimentary sequence of Varanger Peninsula. Major and trace element abundances and ratios from ... -
Geological setting of the Pb-Zn-Cu mineralization in the Mjønesfjell area Nordland, northern Norway
(NGU Bulletin (420), Journal article, 1990)The sediment Pb-Zn-Cu mineralization in the Caledonides of the Mjønesfjell area, Nordland, northern Norway has been mapped and sampled in detail as a basis for structural and geochemical studies of the mineralizations and ... -
Geology and petrochemistry of the Smøla-Hitra Batholith, Central Norway.
(NGU Bulletin (416), Journal article, 1989)The plutonic rocks which compose the Smøla-Hitra Batholith (SHB) cover an exposed area of c.1000 km\u00B2 and intrude folded, Arenig-Llanvirn, low-grade meta-sedimentary and bimodal metavolcanic rocks and higher-grade ... -
Geology of the Folldal area, southern Trondheim Region Caledonides, Norway.
(NGU Bulletin (426), Journal article, 1994)The lowest stratigraphic unit in the Folldal area is the Gula Group, comprising turbidites and minor greenstones in the lower part (the Singsås Formation) and graphitic pelites with subordinate marble and conglomerate in ... -
Groundwater chemistry during test-pumping at Sundby, Verdal, Mid-Norway
(NGU Bulletin (422), Journal article, 1992)The Sundby aquifer, Verdal, Mid-Norway has been evaluated for yield and groundwater quality as a potential water resource for the local municipa- pality. Test-pumping of the aquifer commenced in 1989, after detailed ... -
Inferred Mesozoic faulting in Finnmark: current status and offshore links
(NGU Bulletin (443), Journal article, 2005)An earlier compilation of the post-Caledonian fault system in the Caledonian domain of Finnmark is reassessed in thelight of more recent diverse data acquired from a combination of general geology onshore, well data and ...