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Dmitry P. Gladkochub Sergei A. Pisarevsky Tatiana V. Donskaya Richard E. Ernst Michael T.D. Wingate Ulf Söderlund Anatoliy M. Mazukabzov Eugene V. Sklyarov Michael A. Hamilton John A. Hanes 《Precambrian Research》2010
We present a summary of late Paleoproterozoic to Neoproterozoic mafic magmatism in the Siberian craton, including recently published U–Pb and 40Ar–39Ar dates. These new precise ages suggest that at least some of the previously published K–Ar ages of Siberian mafic bodies should be ignored. The time–space geochronological chart, or the ‘barcode’ of mafic magmatic events shows significant differences between northern and southern Siberia. Both are characterized by ∼1900–1700 Ma magmatic events, but then there was an almost 1 Ga mafic magmatic ‘pause’ in south Siberia until ∼800 Ma. Meanwhile there are indications of multiple mafic magmatic events in North Siberia (Anabar shield and Olenek uplift) between ∼1600 and 1000 Ma. A series of magmatic events probably related to the breakup of Rodinia occurred in southern Siberia after ∼800 Ma. So far, there are no indications of late Neoproterozoic mafic magmatism in North Siberia. Ca. 1000–950 Ma mafic sills were reported from Meso- to Neo-Proterozoic sedimentary successions in the Sette-Daban area on the east side of the Siberian craton, but their tectonic setting is debated. Recent Ar–Ar dates of ∼1750 Ma for NW-trending dykes in the Aldan and Anabar shields, together with similar-age NNE-trending Baikal uplift dykes in south-eastern Siberia suggest the existence of a giant radial dyke swarm possibly related to a mantle plume centred in the Vilyui River area. 相似文献
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Larin A. M. Kotov A. B. Salnikova E. B. Sklyarov E. V. Kovach V. P. Plotkina Yu. V. Anisimova I. V. Podolskaya M. M. 《Doklady Earth Sciences》2020,490(2):55-59
Doklady Earth Sciences - Granite–porphyries of the Yazovka complex occur in the northern part of the Riphean Baikal–Patom fold-thrust belt within the Tonod Uplift of the Early... 相似文献
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E. V. Sklyarov O. A. Sklyarova Yu. V. Men’shagin M. A. Danilova 《Geography and Natural Resources》2011,32(4):323-332
The paper presents a review of shallow lakes on two neighboring territories, Transbaikalia in Russia and Northeastern Mongolia.
Five systems of shallow lakes are distinguished in the regions under study: Barguzin, Eravna-Gusinoozersk, Ingoda, Onon-Borzya,
and Eastern-Mongolian systems. The shallow lakes are sub-grouped according to common chemical compositions and geochemical
evolution types. Characteristics of ground- and surface waters feeding the lakes are considered. Based on results of trace
element analyses of water samples from about 200 lakes and more than 100 springs, wells and boreholes, elements that manifest
higher concentrations, resulting from evaporation of lacustrine waters, are determined. Prospects of assessment of ore-generating
potential of the shallow lakes as ‘liquid ore’ sources in view of commercial extraction of Li, U, REE, and others metals are
discussed. 相似文献
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A. M. Larin A. B. Kotov E. B. Salnikova E. V. Sklyarov A. M. Mazukabzov I. V. Anisimova E. V. Tolmacheva Yu. V. Plotkina 《Doklady Earth Sciences》2018,482(2):1293-1297
The Dotulur alkalic granite and Usugli Depression volcanics (West Stanovoi Superterrane of the Central Asia Fold Belt) have been dated by the U–Pb method, and their geochemistry has been analyzed. The geochemistry of the rocks suggests their intraplate nature. The alkalic granite and volcanics have similar ages of 142 ± 1 Ma and 138 ± 3 Ma, respectively. Considering the Usugli Depression structural position as an upper fault slice of the Elikan metamorphic core, the obtained dates allow the formation of the mentioned core and, accordingly, the collapse of central part of the Mongol–Okhotsk orogeny to have occurred not prior to 140 Ma. 相似文献
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D. P. Gladkochub T. V. Donskaya R. Ernst A. M. Mazukabzov E. V. Sklyarov S. A. Pisarevsky M. Wingate U. Söderlund 《Geotectonics》2012,46(4):273-284
Geological data on the Precambrian basic complexes of the Siberian Craton and their isotopic age are considered. The three main episodes of Precambrian basic magmatism of Siberia correspond to certain stages of the geodynamic evolution of the craton and the Earth as a whole. In the Late Paleoproterozoic, largely in the south and the north of the craton, the basic rocks were emplaced against the background of post-collision extension, which followed the preceding collision-accretion stage responsible for the formation of the craton. In the Mesoproterozoic, primarily in the north of the craton, basic magmatism was controlled by dispersed within-plate extension apparently caused by the impact of a mantle plume. Neoproterozoic basic magmatism widespread in the southern and southeastern parts of the craton was caused by rifting, which accompanied breakdown of the Rodinia supercontinent and opening of the Paleoasian ocean along the southern margin of the Siberian Craton. 相似文献
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D. P. Gladkochub G. Nicoll A. M. Stanevich A. M. Mazukabzov E. V. Sklyarov S. A. Pisarevsky T. V. Donskaya J. Tait 《Doklady Earth Sciences》2013,450(1):494-498
The first data on the age of detrital zircons are given for Late Precambrian terrigenous rocks of the Baikal Group and Ushakovka Formation of the southern flank of the Siberian Craton. The ages obtained for 348 zircons cover the Paleoarchean to Late Ediacaran period, demonstrate the dynamics of change of sources of the clastic material in the sedimentation basin, and mark the changes of the Late Precambrian tectonic regimes. The age of the youngest group of detrital zircons extracted from the rocks of the Kachergat Formation allows us to restrict the upper age limit of accumulation of the rocks of the Baikal Group to the Late Ediacaran (Late Vendian). 相似文献