PALEOARCHEAN MAFIC ROCKS OF THE SOUTHWESTERN SIBERIAN CRATON: PRELIMINARY GEOCHRONOLOGY AND GEOCHEMICAL CHARACTERIZATION
https://doi.org/10.5800/GT-2017-8-3-0267
Abstract
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.
About the Authors
A. V. Ivanov
Institute of the Earth’s Crust, Siberian Branch of RAS
Russian Federation
Irkutsk
Russian Federation
Irkutsk
I. V. Levitsky
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Russian Federation
Irkutsk
Russian Federation
Irkutsk
V. I. Levitsky
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS
Russian Federation
Irkutsk
Russian Federation
Irkutsk
E. I. Demonterova
Institute of the Earth’s Crust, Siberian Branch of RAS
Russian Federation
Irkutsk
Russian Federation
Irkutsk
L Z. Reznitsky
Institute of the Earth’s Crust, Siberian Branch of RAS
Russian Federation
Irkutsk
Russian Federation
Irkutsk
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Review
For citations:
Ivanov A.V., Levitsky I.V., Levitsky V.I., Demonterova E.I., Reznitsky L.Z. PALEOARCHEAN MAFIC ROCKS OF THE SOUTHWESTERN SIBERIAN CRATON: PRELIMINARY GEOCHRONOLOGY AND GEOCHEMICAL CHARACTERIZATION. Geodynamics & Tectonophysics. 2017;8(3):477-480. https://doi.org/10.5800/GT-2017-8-3-0267
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