gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2017-8-3-0267gtcrust-408Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSPALEOARCHEAN MAFIC ROCKS OF THE SOUTHWESTERN SIBERIAN CRATON: PRELIMINARY GEOCHRONOLOGY AND GEOCHEMICAL CHARACTERIZATIONPALEOARCHEAN MAFIC ROCKS OF THE SOUTHWESTERN SIBERIAN CRATON: PRELIMINARY GEOCHRONOLOGY AND GEOCHEMICAL CHARACTERIZATIONIvanovA. V.IvanovA. V.

Irkutsk

Irkutsk

LevitskyI. V.LevitskyI. V.

Irkutsk

Irkutsk

LevitskyV. I.LevitskyV. I.

Irkutsk

Irkutsk

DemonterovaE. I.DemonterovaE. I.

Irkutsk

Irkutsk

ReznitskyL. Z.ReznitskyL Z.

Irkutsk

Irkutsk

Institute of the Earth’s Crust, Siberian Branch of RASРоссияInstitute of the Earth’s Crust, Siberian Branch of RASRussian FederationA.P. Vinogradov Institute of Geochemistry, Siberian Branch of RASРоссияA.P. Vinogradov Institute of Geochemistry, Siberian Branch of RASRussian Federation20171110201783477480Copyright © Ivanov A.V., Levitsky I.V., Levitsky V.I., Demonterova E.I., Reznitsky L.Z., 20172017Ivanov A.V., Levitsky I.V., Levitsky V.I., Demonterova E.I., Reznitsky L.Z.Ivanov A.V., Levitsky I.V., Levitsky V.I., Demonterova E.I., Reznitsky L.Z.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/408

The Siberian craton consists of Archean blocks, which were welded up into the same large unit by ca 1.9 Ga [Gladkochub et al., 2006; Rojas-Agramonte et al., 2011]. The history of the constituent Archean blocks is mosaic because of limited number of outcrops, insufficient sampling coverage because of their location in remote regions and deep forest and difficulties with analytical studies of ancient rocks, which commonly underwent metamorphic modifications and secondary alterations. In this short note, we report data on discovery of unusual for Archean mafic rocks of ultimate fresh appearance. These rocks were discovered within southwestern Siberian craton in a region near a boundary between Kitoy granulites of the Sharyzhalgai highgrade metamorphic complex and Onot green-schist belt (Fig. 1). Here we present preliminary data on geochronology of these rocks and provide their geochemical characterization.

The Siberian craton consists of Archean blocks, which were welded up into the same large unit by ca 1.9 Ga [Gladkochub et al., 2006; Rojas-Agramonte et al., 2011]. The history of the constituent Archean blocks is mosaic because of limited number of outcrops, insufficient sampling coverage because of their location in remote regions and deep forest and difficulties with analytical studies of ancient rocks, which commonly underwent metamorphic modifications and secondary alterations. In this short note, we report data on discovery of unusual for Archean mafic rocks of ultimate fresh appearance. These rocks were discovered within southwestern Siberian craton in a region near a boundary between Kitoy granulites of the Sharyzhalgai highgrade metamorphic complex and Onot green-schist belt (Fig. 1). Here we present preliminary data on geochronology of these rocks and provide their geochemical characterization.

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The authors declare that there are no conflicts of interest present.