Browsing Геология России by Title
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Browsing Геология России by Title
Now showing items 3135-3154 of 39126
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(2003)We present results of study of contact-reactionary rocks from the Nyurundukan ultramafic-mafic massif in northern Prebaikalia. The host metabasites metamorphosed in the conditions of amphibolite facies are shown to have ...
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(2003)The free organic components of the Orgueil carbonaceous chondrite have been the subject of much controversy. Several proposals for their source have been put forward including extraterrestrial abiotic processes, extraterrestrial ...
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(2001)Mg-skarns enclosed in dunite cumulates of the Neo-Proterozoic Ioko-Dovyren intrusion (northern Baikal region, Russia) can be traced to silica-poor dolomitic host rock layers. The dominant minerals of the skarns are brucite ...
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(2004)Contemporaneous occurrences of the geologic signals of ‘large impacts’, craton-associated continental flood basalts, and mass extinctions have occurred far too often during the past 400 Myr to be plausibly attributed to ...
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(2004)Global coverage of landmass by a network of reference GPS stations has principally changed the interpretation of the observation of active processes on the Earth using modern space geodesy. The problem of realization of ...
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(PANGAEA, 2018-10-02)Macrofauna were sampled in 2006 during cruise of RV of MSU Feodosia Gulf (Black Sea off the coast of south-eastern Crimea) with "OCEAN" Grab 0.04 m-2, at depths from 7 to 38 m. The sampled material was washed mesh 1 mm ...
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(1992)Sulphur contents and isotopic compositions have been determined in 90 fresh mantle-derived garnet and spinel peridotite and pyroxenite xenoliths from six regions of Cenozoic alkali basaltic volcanism in southern Siberia ...
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(PANGAEA, 2009-10-06)
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(PANGAEA, 2007-06-12)
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(1996)During the Neoproterozoic and Palaeozoic the two continents of Baltica and Laurentia witnessed the break-up of one supercontinent, Rodinia, and the formation of another, but less long-lived, Pangea. Baltica and Laurentia ...
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(PANGAEA, 2017-11-10)To evaluate the consequences of possible future climate changes and to identify the main climate drivers in high latitudes, the vegetation and climate in the East Siberian Arctic during the last interglacial are reconstructed ...
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(2001)Orogeny is modelled numerically by treating continental collision within full convection solutions, in order to better understand some aspects of the Variscan structures and processes. Three different approaches are taken: ...
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(2004)Studies of supercontinental cycle are mainly concentrated on the assembly, breakup and dispersal of supercontinents, and studies of continental crustal growth largely on the growth and loss (recycling) of the crust. These ...
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(2004)Models of melting accompanying mantle upwelling predict far more melt than is observed at nonvolcanic margins. The discrepancy may be explained if the paradigm of a uniform asthenosphere is incorrect. Work on the velocity ...
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(2002)The growth of juvenile continental crust during a possible superplume event at 1.9-Ga occurred chiefly in the form of new arc systems (esp. continental-margin arcs), which were accreted to cratons during supercontinent ...
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(2003)During Proterozoic time, growth of the continents took place by the addition of mantlederived, juvenile material to pre-existing continental blocks. This accretion took place largely within three tectonic environments: (1) ...
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(2004)We study possible scenarios for the evolution of continental collision zones by using a dynamic thermomechanical model that includes brittle-elastic-ductile rheology, surface erosion, and explicit metamorphic changes. This ...
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(2004)Small-scale centrifuge models were used to investigate the role of continental rift structure in controlling patterns of magma migration and emplacement. Experiments considered the reactivation of weakness zones in the ...
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(2001)Analysis of major rift systems suggests that the preexisting structure of the lithosphere is a key parameter in the rifting process. Rift propagation is not random, but tends to follow the trend of the orogenic fabric of ...
Now showing items 3135-3154 of 39126