Results 191 to 200 of about 1,709 (224)

Deep crustral structure in Ukrainian Crystalline Shield

International Geology Review, 1967
The 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, S.I. Subbotin, V.B. Sollogub, M.N. Ivantishin, A.V. Chekunov, V.D. Ladiyeva   +5 more
openaire   +1 more source

Precambrian geosynclinal metallogeny of Ukrainian shield

International Geology Review, 1968
The 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, 1965
The 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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Potentially Diamondiferous Rocks of the Ukrainian Shield

17th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, 2023
H. H. Pavlov, H. O. Pavlova
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Metamorphism evolution in the southwestern part of the Ukrainian Shield

International Geology Review, 1980
(1980). Metamorphism evolution in the southwestern part of the Ukrainian Shield. International Geology Review: Vol. 22, No. 5, pp. 561-567.
openaire   +1 more source

Geology and Geochronology of Early Precambrian of the Ukrainian Shield

Journal Geological Society of India, 1979
Abstract The Early Precambrian of the Ukrainian shield is represented by geological formations older than 2.6 b.y. The Archean formations are established in three big regions of the Ukrainian shield. These regions are tectonic blocks. Each block is characterized by specific petrological and geological features. In each block the grade of
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REGIONAL METAMORPHISM AND STRATIGRAPHY OF THE BASEMENT OF THE UKRAINIAN SHIELD: ARTICLE 2. GENERAL GEOCHRONOLOGICAL SCALE OF THE PRECAMBRIAN AND STRATIGRAPHY OF THE UKRAINIAN SHIELD

2023
Стратиграфічні комплекси нижнього докембрію повсюдно метаморфізовані. Тому стратиграфічне розчленування нижнього докембрію завжди нерозривно пов’язано з вивченням метаморфізму. Деякий час ступінь метаморфізму комплексів навіть використовували як ознаку відносного віку.
openaire   +1 more source

Eoarchean rock association in the Dniester-Bouh Domain of the Ukrainian Shield: A suite of LILE-depleted enderbites and mafic granulites

Precambrian Research, 2021
Leonid Shumlyanskyy, Simon A Wilde, Alexander A Nemchin   +2 more
exaly  

Problems of Stratigraphy and Geochronology of the Ukrainian Shield

Mineralogical journal, 2018
openaire   +2 more sources

Incompatible element-enriched mantle lithosphere beneath kimberlitic pipes in Priazovie, Ukrainian shield: volatile-enriched focused melt flow and connection to mature crust?

International Geology Review, 2021
Igor Ashchepkov, G Kalashnyk, N S Medvedev   +2 more
exaly