Blar i Artikler på emneord "PETROLOGI"
Viser treff 1-20 av 37
-
A new occurrence of gabbro in the Oslo Rift, South Norway
(NGU Bulletin (441), Journal article, 2003)Xenoliths made up of an assemblage of gabbro, diorite and biotite monzonite in syenite and granite and veined by these rocks have been found within a small area at the south end of lake Mykle in the southern part of the ... -
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 ... -
Amphibolites and metagabbros from the Proterozoic Telemark Suite of Setesdalsheiene, South-central Norway.
(NGU (378), Journal article, 1983)Proterozoic supracrustal rocks of the Telemark Suite, including large thicknessof basic metavolcanites, occur as a large-scale isolated outlier within theolder gneiss-migmatitegranite complex on the mountain plateau ... -
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 ... -
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 ... -
High-temperature ultramafic complexes in the North Norwegian Caledonides: I - Regional setting and field relationships.
(NGU Bulletin (405), Journal article, 1986)Forkortet.Four major (25-100 km\u00B2) ultramafic complexes were developed in the Sørøy Nappeduring the second phase of Finnmarkian deformation in the North NorwegianCaledonides. They were emplaced into layered mafic ... -
Komatiitic Chlorite-amphibole rocks and mafic metavolcanics from the Karasjok greenstone belt, Finnmark, northern Norway: a preliminary report.
(NGU (382), Journal article, 1983)A general account is presented of the field relationships, geochemistry and petrology of mafic and ultramafic metavolcanics within the Precambrian Karasjok greenstone belt. These metavolcanic rocks make up the major part ... -
Melt-mineral-fluid interaction in pealkaline silicic intrusions in the Oslo Rift, Southeast Norway. II. High temperature fluid inclusions in the Eikeren-Skrim.
(NGU Bulletin (417), Journal article, 1990)The Eikeren-Skrim subvolcanic granite complex consists of mildly peralkaline rocks, most of which contain abundant miarolitic cavities. Optical microscope studies reveal that several generations of fluids and solids were ... -
Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, Southeast Norway. I. Distribution of elements in the Eikeren ekerite.
(NGU Bulletin (417), Journal article, 1990)The behaviour of different elements during formation of the Eikeren ekerite (alkali granite) has been studied with the help of an element correlation matrix. The compositional relations are the result of partitioning of ... -
Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, Southeast Norway. III. Alkali geothermometry based on bulk fluid inclusion content.
(NGU Bulletin (417), Journal article, 1990)Decrepitation-linked ICP analyses of bulk fluid inclusion in quartz in 14 samples from the Sande nordmarkite (quartz syenite) and the Eikeren Skrim ekerite (alkali granite) plutonic complexes yield Na\/K ratios which suggest ... -
Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, Southeast Norway. IV. Fluid inclusions in the Sande nordmarkite.
(NGU Bulletin (417), Journal article, 1990)The mildly peralkaline Sande nordmarkite (quartz syenite) intrusion contains interstitial quartz and mafic minerals (alkali amphibloe, ilmenite, titanomagnetite, zirkon, sphene + calcite). Three generations of fluid ... -
Microsyenite from Lake Mykle, Oslo Rift: Subvolcanic rocks transitional between larvikite and nordmarkite
(NGU Bulletin (441), Journal article, 2003)A small body of trachyte or microsyenite cropping out east of lake Mykle in the Vestfold Graben of the Oslo Rift probably represents a subvolcanic intrusion emplaced at a fairly early stage of the intrusive history of the ... -
Petrological studies of the Neiden granite complex.
(NGU (237), Journal article, 1966)The Neiden granite complex fits well into Raguin's group of \"anatectic granites with suites of migmatites\". In this area, supracrustals of the Bjørnevatn group have, together with their gneissgranitic basement, been ... -
Petrology and geochemistry of high-grade metamorphic and igneous rocks on Langøy, northern Norway.
(NGU (207), Journal article, 1960)The rocks on Langøy have been considered as representing an igneous rock series including metamorphic sedimentary rocks of \"Caledonian type\". The present work shows that they are for the most part high-grade metamorphic ... -
Petrology and isotope geology of the Hunnedalen Monzonoritic Dyke Swarm, SW Norway: a possible late expression of Egersund Anorthosite magmatism
(NGU Bulletin (434), Journal article, 1998)The widest and northernmost dyke of the post-tectonic Late Proterozoic Hunnedalen Monzonoritic Dyke Swarm has been studied petrographically, chemically (major and trace element) and isotopically (Rb-Sr; Sm-Nd; K-Ar) toghether ... -
Petrology and metallogeny associated with the Tryvann Granite Complex, Oslo Region.
(NGU Bulletin (423), Journal article, 1992)The Tryvann Granite Complex (TGC) comprises four separate intrusive bodies within the Oslo Graben. It constitutes a differentiated suite of young (240- 245 Ma) alkaline quartz syenites and granites derived from a strongly ... -
Petrology of differential gabbro sheets in the Altenes tectonic window, North Norway.
(NGU Bulletin (414), Journal article, 1989)The petrography of two differentiated gabbro sheets in the low-grademetamorphic Karelian supracrustal sequence of the Altenes Tectonic Window isdescribed. The intrusion have generally undergone extensive deuteric alter-ation. ... -
Petrology, geochemistry and genesis of the type area trondhjemite in the Trondheim Region, Central Norwegian Caledonides.
(NGU (351), Journal article, 1979)Trondhjemite from the Follstad district of the Trondheim region is present within allochthonous Lower Paleozoic eugenosynclinal and partly miogeosynclinal rocks of the Caledonide orogen. Four periods of trondhjemite intrusive ...