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https://doi.org/10.26516/2541-9641.2026.1.115

EDN: GVXFCU

Global and Regional (Siberian) Processing of the Lithosphere 2.7 Byr ago: Isotopic Evidence

S.V. Rasskazov^1,2

¹Institute of the Earth's Crust SB RAS, Irkutsk, Russia

²Irkutsk State University, Irkutsk, Russia

Abstract. A review of radiogenic isotope data indicates significant processing of the lithosphere ca. 2.7 Byr ago on a global and regional (Siberian) scales. This time marks the beginning of the middle geodynamic epoch of Asian mantle evolution that ends ca. 1.8 Byr ago. The middle mantle geodynamic epoch corresponds to the lithosphere generation that resulted in large continental segregations of the Siberian and other paleocontinents.

Keywords: Earth's evolution, middle geodynamic stage, U/Pb, Sm/Nd, Re/Os isotope systems

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Rasskazov Sergei Vasilevich,

doctor of geological and mineralogical sciences, professor,

664003 Irkutsk, st. Lenina, 3,

Irkutsk State University, Faculty of Geology,

Head of Dynamic Geology Char,

664033 Irkutsk, st. Lermontova, 128,

Institute of the Earth's Crust SB RAS,

Head of the Laboratory for Isotopic and Geochronological Studies,

tel.: (3952) 51–16–59,

email: rassk@crust.irk.ru