Results 171 to 180 of about 3,591 (216)

TEM-TDEM soundings in the eastern Siberian craton

Russian Geology and Geophysics, 2008
Abstract We report forward modeling results for transient magnetic fields excited by horizontal electric or vertical magnetic dipoles. Modeling was performed with reference to resistivity patterns typical of platform areas in East Siberia.
G.M. Morozova, E.Yu. Antonov
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Antiquity of peridotitic diamonds from the Siberian craton

Earth and Planetary Science Letters, 1997
Abstract Diamonds erupted by kimberlites traversing ancient continental tectosphere [1] provide a window into the evolution of continents and their mantle keels. However, the vintage of this window; that is, the timing of crystallization of peridotitic mineral inclusion-bearing diamonds beneath different cratons, has proved controversial because of ...
S.H. Richardson, J.W. Harris
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Paleoproterozoic, High‐Metamorphic, Metasedimentary Units of Siberian Craton

Acta Geologica Sinica - English Edition, 2009
Abstract:Sensitive, high‐resolution ion microprobe zircon U–Pb ages of Paleoproterozoic, high‐grade, metasedimentary rocks from the south‐western part of the Siberian Craton are reported. Early Precambrian, high‐grade complexes, including garnet–biotite, hypersthene–biotite, and cordierite‐bearing gneisses compose the Irkut terrane of the Sharyzhalgay ...
Lena URMANTSEVA, Olga TURKINA
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Density heterogeneity of the cratonic lithosphere: A case study of the Siberian Craton

Gondwana Research, 2015
Using free-board modeling, we examine a vertically-averaged mantle density beneath the Archean–Proterozoic Siberian Craton in the layer from the Moho down to base of the chemical boundary layer (CBL). Two models are tested: in Model 1 the base of the CBL coincides with the LAB, whereas in Model 2 the base of the CBL is at a 180 km depth.
Cherepanova, Yulia, Artemieva, Irina
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The Siberian lithosphere traverse: mantle terranes and the assembly of the Siberian Craton

Tectonophysics, 1999
Abstract The kimberlite fields scattered across the NE part of the Siberian Craton have been used to map the subcontinental lithospheric mantle (SCLM), as it existed during Devonian to Late Jurassic time, along a 1000-km traverse NE–SW across the Archean Magan and Anabar provinces and into the Proterozoic Olenek Province.
W.L Griffin, C.G Ryan, F.V Kaminsky, Suzanne Y O'Reilly, L.M Natapov, T.T Win, P.D Kinny, I.P Ilupin   +7 more
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Age of the Siberian craton crust beneath the northern kimberlite fields: Insights to the craton evolution

Gondwana Research, 2016
Abstract Comprehensive studies of zircon xenocrysts from kimberlites of the Kuoika field (northeastern Siberian craton) and several kimberlite fields of the eastern Anabar shield, along with data compilation on the age of kimberlite-hosting terranes, reveal details of the evolution of the northern Siberian craton.
Sergey I. Kostrovitsky, Sergey Yu. Skuzovatov, Dmitry A. Yakovlev, Jing Sun, Lutz Nasdala, Fu-Yuan Wu   +5 more
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Middle Paleozoic kimberlite magmatism in the northeastern Siberian craton

Doklady Earth Sciences, 2016
The mineral chemistry and crystal morphology of kimberlite pyropes from the Billyakh River placer in the northeastern Siberian craton are characterised in terms of the placer history. The pyropes bear signatures of chemical weathering (dissolution), presumably in a Middle Paleozoic laterite profile, and therefore were originally hosted by Middle ...
E. O. Egorova, V. P. Afanas’ev, N. P. Pokhilenko   +2 more
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Seismotectonic Activation of Modern Structures of the Siberian Craton

Geotectonics, 2018
Our research of the modern structures of Siberian Craton aims to reveal regional regularities in the seismotectonic destruction of the Earth’s crust and to clarify the dynamics of the formation of the focal zones of strong earthquakes. Analysis of activated structures and marginal suture zones located in the study area was based on structural and ...
L. P. Imaeva, V. S. Imaev, B. M. Koz’min   +2 more
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Assembly of the Siberian Craton: Constraints from Paleoproterozoic granitoids

Precambrian Research, 2020
Abstract The paper presents a synthesis of geochronological, geochemical, and isotopic data on Paleoproterozoic granitoids in the Siberian craton and, in some cases, on volcanics related to these granitoids. Different evolution stages of the craton, including its assembly, are recorded in several major events in the history of Paleoproterozoic ...
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Sayan–Biryusa Volcanoplutonic Belt (Southern Siberian Craton): Age and Petrogenesis

Russian Geology and Geophysics, 2019
Abstract —Geological, geochronological, and geochemical isotope studies are carried out for metamorphosed volcanic rocks and dolerites of the Maltsevka sequence of the Elash Group in the Biryusa block of the Siberian craton. It is found that mafic igneous rocks (dolerites and basaltic andesites) are close in composition to intraplate ...
T.V. Donskaya, D.P. Gladkochub, A.M. Mazukabzov, P.A. L’vov, E.I. Demonterova, Z.L. Motova   +5 more
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