Blar i NGU Open Archive på emneord "PREKAMBRIUM"
Viser treff 21-40 av 170
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Building stone of central and southern Ethiopia: deposits and resource potential
(NGU Bulletin (436), Journal article, 2000)The bedrock geology of Ethiopia exhibits a variety of rock types that can potentially be developed for building stone production. The ETHIONOR project has so far included investigation of such resources in the southern and ... -
Carbonate rocks of Karelia: geochemistry and carbon-oxygen isotope systematics in the Jatulian stratotype and potential for magnesite deposits
(NGU-Rapport (96.086), Report, 1996)Closely spaced samples (73 in number) of shallow water, red, stromatolitic dolomite and magnesite from the Palaeoproterozoic (1980 +-27 Ma as a minimum age) Tulomozerskaya Formation in a distal portion of the Onega ... -
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR
(NGU Bulletin (421), Journal article, 1991)Combined geological and petrochemical data suggest that the Lapland Granulite Belt can be divided into a lower sedimentary-volcanic unit and an upper, predominantly sedimentary sequence. Metamorphic rocks from the lower ... -
Contributions to the geology of Hardangervidda (West Norway) I. An explosion-breccia occurrence in Hjølmodalen.
(NGU (247), Journal article, 1967)An occurrence of breccia, which is thought to have been formed\rby a fluidization process, is described. The breccia is supposed to be\rgenetically related to similar breccias encountered in other parts of\rthe Precambrian ... -
Contributions to the geology of the Mjøsa districts and the classical sparagmite area in Southern Norway.
(NGU (220), Journal article, 1963)This publication gives a survey of the main results of geological investigations carried out in the Mjøsa districts in central Southeast Norway by the author during recent years. The transitional situation of the districts ... -
COPENA conference at NGU, August 18-22 1997: Abstracts and Proceedings
(NGU-Rapport (97.131), Report, 1997)IGCP project 371 COPENA (Structure and Correlation of the Precambrium in NE Europe and the North Atlantic Realm) is a major current research and corre- elation venture in the North Atlantic Region and the European Precambrian ... -
Correlation between the Late Precambrian Older Sandstone series of the Varangerfjord and Tanafjord areas. Preliminary report.
(NGU (266), Journal article, 1970)Sedimentary rocks belonging to the late Precambrian Older Sandstone Series (overlain unconformably by the Eocambrian-Lower Cambrian Vestertana Group) are described from the Vadsø-Komagelva area on the northern side of ... -
Correlation of Doggeelv and Lomvann formations, Komagfjord tectonic window, Finnmark: an alternative suggestion.
(NGU (234), Journal article, 1965)Føyn's beskrivelse (1964) av Bossekop-gruppen i Alta-området og jevnføringen med den eldre sandsteinserien i Tana, ledet mine tanker til en annen mulig jevnføring av Doggeelv og Lomvann formasjonene enn den som jeg har ... -
Database for alle geologiske opplysninger om den prekambriske geologien på Kvaløya, Troms fylke.
(NGU-Rapport (92.104), Report, 1992)Rapporten inneholder beskrivelse av geologien på Kvaløya, Troms fylke. Beskrivelsen er basert på eget feltarbeid utført somrene 1990 og 1991 og laboratorieundersøkelser. Videre fra trykte publikasjoner og kart og upubli- ... -
Database for alle geologiske opplysninger om forkastninger og skjær- soner som opptrer på kartblad 1:250 000 Tromsø.
(NGU-Rapport (92.107), Report, 1992)Rapporten inneholder beskrivelse av forkastninger og skjærsoner som opptrer på kartblad 1:250 000 Tromsø. Beskrivelsen er basert på eget feltarbeid utført somrene 1990 og 1991 og laboratorie-undersøkelser. Videre fra trykte ... -
De prekambriske bergarter i Telemark, I. Gruber og skjerp innen gradeteigkart E36V Kviteseid.
(NGU (216), Journal article, 1963)Approximately 115 mines and claims have been examined in the years 1941-1961 during regional geological mapping of the Kviteseid quadrangle. The map area covers a part of the \"Thelemark-Sætersdal ore province\" established ... -
Den tillittførende formasjonsgruppe i Alta - en jevnføring med Øst-Finnmark og med indre Finnmark.
(NGU (228), Journal article, 1964)The Bosskop quartzite, the tillite layer and the succeedingbeds in Alta wer mapped by the present author in 1962. The mapping wasdone on aerial photographs at about 1:20 000. Fig. 1 give the result ona reduced scale. In ... -
Description of the geological maps "Tromsø" and "Målselv", Troms I. The Precambrian window of Mauken-Andsfjell.
(NGU (247), Journal article, 1967)This paper is the first part of a description of the bedrock on the two 1:100 000 map sheets, \"Målselv\" and \"Tromsø\". The geological map \"Målselv\", accompanies the paper. This part deals with the \"window\" of ... -
Dome-bassin strukturer i grundfjeldet mellem Kolbotn og Bunnefjorden, Akershus.
(NGU (304), Journal article, 1974)Dome and basin structures in Precambrian gneisses east of the Oslo fjord have been mapped. A short description is given of the rock types and the main structure, the Gjersjø dome. The axial-plane of the youngest folding ... -
Early Proterozoic (c 2000-1900 Ma) crustal structure of the northeastern Baltic Shield: tectonic division and tectogenesis.
(NGU Bulletin (403), Journal article, 1985)Recent structural investigations in the Precambrian of northern Finnish Lapland and Norwegian Sørvaranger and their extrapolation into the neighbouring Kola Peninsula have stablished that the northeastern part of the Baltic ... -
Early Proterozoic shallow-marine albite-rich sandstone in the Karasjok Greenstone Belt, Norway.
(NGU Bulletin (403), Journal article, 1985)A remarkably little-deformed sandstone in a roadcut near Karasjok showssedimentary structures characteristic of a subaerially exposed tidalenvironment. The fining upward sequence displays flaser bedding, parallellamination, ... -
Economic potential of potassic feldpar-rich gneisses in Tysfjord/ Hamarøy, northern Norway
(NGU Bulletin (436), Journal article, 2000)Potassic feldspar gneiss in the Tysfjord\/Hamarøy area may be potential resource for future exploitation. The rock consists primarily of microcline (up to 84%) and quartz (up to 35%) together with small amounts of plagioclase ... -
Egersund. Fjeldbygningen inden rektangelkartet Egersunds omraade
(NGU (71), Journal article, 1914)Forkortet: The principal part of the rocky underground consists of labradorite-rocks, as may be seen on the map. These are not homogeneous all over the area neither with regard to the mineralogical composition, nor regarding ... -
Eocambrian rocks on the north-west border of the Trondheim basin.
(NGU (251), Journal article, 1967)Three occurrences of Eocambrian rocks on the north and west borders of the Trondhim basin are compared, namely in the Gangåsvatn, Opdal and Tømmerås areas. It is shown that the sequence in the Gangåsvann area consists of ... -
Epigenetisk koppermineralisering på Finnmarksvidda.
(NGU (203), Journal article, 1958)In the Precambrian rocks of Finnmarksvidda, one big copper deposit, Biddjovagge, and a series of small sulphide occurrences are located. The sulphides are pyrite, chalkopyrite and phyrrhotite, in some places also bornite ...