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Now showing items 141-160 of 185
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(1996)The first data on the Nd isotopic composition in high-AI gneisses and associated gamet-hypersthene-biotite plagiogneisses of the Kurumkan Subgroup, the lengra Group of Aldan Shield are presented. The obtained results show ...
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(2000)A new version of stratigraphic scheme for the Kostomuksha greenstone belt in Karelia is suggested on the basis of lithological, geochemical, and isotopic data obtained for ultramafic, mafic, and acidic volcanic rocks of ...
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(1995)Three main structural units are recognized in the Archean granito-gneissic basement of eastern Finland: (1) a lower unit (Kivijärvi orthogneisses), which is highly migma-tized and characterized by circular and elliptical ...
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(1998)Lithospheric temperatures and heat flow densities (HFD) were simulated in the 650 km long SVEKA transect in the central Fennoscandian Shield. The area is characterized by anomalously thick crust (up to 55 km) and lithosphere ...
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(2001)It is accepted that during the Late Heavy Bombardment (LHB-4.2-3.8 Ga) in the Solar system, as preserved on the Moon, the terrestrial upper mantle-crust system was dominated by interactions between internal mantle processes ...
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(2004)Rare Archaean light rare earth element (LREE)-enriched mafic rocks derived from a strongly refractory mantle source show a range of features in common with modern boninites. These Archaean second-stage melts are divided ...
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(1994)Graphite-bearing peridotites, pyroxenites and eclogite xenoliths from the Kaapvaal craton of southern Africa and the Siberian craton, Russia, have been studied with the aim of: 1) better characterising the abundance and ...
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(2001)This study uses information on composition, thermal state and petrological thickness to calculate the densities of different types of subcontinental lithospheric mantle (SCLM). Data from mantle-derived peridotite xenoliths ...
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(1996)The depletion of the siderophile element tungsten (W) in the bulk silicate Earth (BSE), due to core formation, provides clues to the formation and early evolution of the Earth. This study significantly improves our knowledge ...
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(1999)Estimates of effective elastic thickness (Te), a measure of the strength of the plate, have shown that older and cool cratonic regions are characterised by a stronger lithosphere (higher Te values) than areas which have ...
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(2000)The Baltic Sea, particularly its southeastern part, is discussed in the paper. Investigations of regional character as well as specialized studies in the area are reviewed. General historical works are mentioned briefly. ...
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(2000)Zircon megacrysts represent a late stage in the crystallisation of the magmas that produced the low-Cr megacryst suite (Ol+Opx+Cpx+Gnt+Ilm+Phl+Zir) found in many kimberlites, and may carry information on the sources of the ...
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(2003)The Hisovaara structure in the northern Karelian greenstone belt includes two complexes of metamorphosed magmatic rocks different in age and composition. The earlier of them comprises metamorphosed tholeiites, boninites, ...
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(2004)The Kislaya Guba Formation studied in the Near-Imandra synform of the Late Archean Terskii-Allarechensk greenstone belt is characterized. The basal, approximately 300-m-thick horizon of the formation is composed of amphibole ...
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(2003)The global Archean record preserves ca. 35 large cratonic fragments and a less well defined number of smaller slivers. Most Archean cratons display rifted margins of Proterozoic age and therefore are mere fragments of ...
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(2003)Mantle fluids sampled by mid-ocean ridge basalts and by diamonds are depleted in the heavy isotope of nitrogen, 15N, by about 3–5 parts per mil relative to atmosphere, suggesting a common nitrogen end-member since at least ...
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(2001)There is first publication about found the archean ophiolite accotiacion in Irin-Gora, Karelia, Baltic shield, Russia
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(2003)The composition of the subcontinental lithospheric mantle (SCLM) varies in a systematic way with the age of the last major tectonothermal event in the overlying crust. This secular evolution in SCLM composition implies ...
Now showing items 141-160 of 185