Results 181 to 190 of about 12,831 (220)
EUROBRIDGE'97 : deep seismic sounding of the Ukrainian Shield
, 1998 Giese, R. +1 more
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Silicicolous lichen communities of the Ukrainian Crystalline Shield
Applied Vegetation Science, 2022AbstractQuestionsHow many different silicicolous lichen syntaxa occur on the Ukrainian Crystalline Shield and what ecological factors are influencing their distribution?LocationUkrainian Crystalline Shield, Steppe and Forest–Steppe zones, Ukraine.MethodsThe field research was performed during 2013–2020.
Alexander Khodosovtsev +3 more
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Tectonophysics, 2001
Abstract A palaeomagnetic study has been performed on Palaeo-Mesoproterozoic rocks from three crustal blocks of the Ukrainian Shield, southern Sarmatia. Primary remanent magnetizations have been isolated in 2.0 Ga monzonite, 2.0–1.8 Ga sandstone, 1.77–1.72 Ga anorthosite and from mafic dykes of probably Palaeo-Mesoproterozoic ages.
S.-Å. Elming +2 more
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Abstract A palaeomagnetic study has been performed on Palaeo-Mesoproterozoic rocks from three crustal blocks of the Ukrainian Shield, southern Sarmatia. Primary remanent magnetizations have been isolated in 2.0 Ga monzonite, 2.0–1.8 Ga sandstone, 1.77–1.72 Ga anorthosite and from mafic dykes of probably Palaeo-Mesoproterozoic ages.
S.-Å. Elming +2 more
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The carbonatite zone in the Ukrainian shield
International Geology Review, 1978(1978). The carbonatite zone in the Ukrainian shield. International Geology Review: Vol. 20, No. 10, pp. 1131-1140.
Yu. L. Kapustin +4 more
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Deep crustral structure in Ukrainian Crystalline Shield
International Geology Review, 1967The top of the "basaltic" layer may lie at 5 to 9 km below the surface in places and positions predictable geologically and radiochemically. A folded metamorphic complex (as old as 3.55 b.y.) is believed to exist at 3 to 4 km depth, underlain by ancient siallitic horizons which grade into the "basalt." The mean geothermal gradient in the Krivoy Rog ...
N.P. Semenenko +5 more
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Precambrian geosynclinal metallogeny of Ukrainian shield
International Geology Review, 1968The granites of the Ukrainian shield are secondary; the “shield,” in the first instance, is a segment of a fold belt which extends from the Black Sea, via the Voronezh Arch, to the Kola Peninsula. The metamorphic ungranitized anticlines are narrow folds in which are found iron, copper, zirconium and precious metals. Iron, titanium, copper, graphite and
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Principal stages in geological evolution of Ukrainian shield
International Geology Review, 1965The first attempt at coordination of the newest geochronological findings with identifiable petrographic complexes within the Ukrainian Shield, here seen as products of geosynclinal evolution and of granitization (in the modern sense), suggests the following characteristic traits of the Precambrian evolution of the earth's crust: an arrest of the upper
Ya. M. Belevtsev, A.K. Prus
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Precambrian Research, 2010
A palaeomagnetic, geochronologic and geochemical study of basic dykes in the Ukrainian Shield has been undertaken with the purpose of testing a hypothesis for timing of accretion of the Ukrainian Shield with Fennoscandia. On the basis of geological data it has been suggested that the two shields amalgamated at ca. 1900-1800 Ma.
Sten-Åke Elming +4 more
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A palaeomagnetic, geochronologic and geochemical study of basic dykes in the Ukrainian Shield has been undertaken with the purpose of testing a hypothesis for timing of accretion of the Ukrainian Shield with Fennoscandia. On the basis of geological data it has been suggested that the two shields amalgamated at ca. 1900-1800 Ma.
Sten-Åke Elming +4 more
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Ejecta of the Boltysh Impact Crater in the Ukrainian Shield
2003The Boltysh crater is an about 24-km-diameter complex impact structure, which is situated in the central part of the Ukrainian Shield. The crater is surrounded by an ejecta blanket represented by a polymict breccia layer that is preserved over an area of ~6500 km2.
Gurov, Eugene P. +2 more
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Kamenetsk—A new impact structure in the Ukrainian Shield
Meteoritics & Planetary Science, 2017AbstractThe Kamenetsk impact structure is a deeply eroded simple crater that formed in crystalline rocks of the Ukrainian Shield. This study presents structural, lithologic, and shock metamorphic evidence for an impact origin of the Kamenetsk structure, which was previously described as a paleovolcano. The Kamenetsk structure is an oval depression that
Eugene Gurov +3 more
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