...Fig. 3. Schematic geologic structure of the Shumikha block. Compiled by M.Yu. Rumyantsev and O.M. Turkina. 1 — Devonian volcanosedimentary deposits of the Rybnaya depression; 2 — Late Riphean-Cambrian volcanosedimentary deposits. Late Riphean metavolcanogenic (paleoisland-arc) complex...

... granitoids abundant within the cis-Sayan uplift were earlier assigned to the Sayan and Shumikha complexes but there was no consensus on their geodynamic environments. Geochemical studies of the Sayan granitoids at the junction between the Biryusa block and the Urik-Iya graben fill and the Shumikha granitoids...

... complex granitoids are similar to other Early Proterozoic postcollisional granitoid complexes on the periphery of the Siberian craton — Tarak, Sayan, Shumikha, and Kodar. Some petrochemical differences between these granitoid complexes are due to regional variations in the compositions of the sources...

... of the Paleoproterozoic (1.85 Ga) magmatic zircons from the granites as compared with the Archean crustal rocks of the Bulun terrane testifies to the contribution of juvenile material to the granite formation. Highly ferroan granodiorites and granites of the Shumikha pluton in the Onot terrane are enriched in HFSE...

... and Geophysics) 39 ( 1 ), 55 – 64 (52–61). Rumyantsev , M.Yu. , Turkina , O.M. , Nozhkin , A.D. , 1998 . Geochemistry of the Shumikha gneiss amphibolite complex of the Kan Block (northwest of East Sayan) . Geologiya i Geofizika (Russian Geology...

... of different rock suites for each series. Fig. 2. Scheme of the location of Late Ordovician magmatic associations in the north of Altai–Sayan folded area. 1 , sediments (D 2gv –C); 2 , Early Devonian magmatic areas; 3–5 , Late Ordovician magmatic complexes: 3 , volcanics of Kachinsk–Shumikha, KShD...

... of the Siberian Platform basement; 4–8 , Proterozoic complexes in the northwestern part of the East Sayan segment of the accretionary belt: Kan ( 4 ), Shumikha–Kirel’ ( 5 ), Arzybei ( 6 ), and Derba ( 7 ) blocks and Kuvai volcanic zones (Kuvai and other formations) ( 8 ); 9 , geologic boundaries: a , faults...

... in the Paleoproterozoic. These metamorphites are intruded by a number of massifs of Early Proterozoic granitoids of the Sayan and Shumikha complexes. In this work, we present results of complex geological and analytical (geochronological, geochemical, and isotope-geochemical) research into granitoids of the Kitoi...

... to the generation of granitic melt ( Figs. 6 A and 7 A). The major contribution of the Archean crust is assumed for Paleoproterozoic granitoids of granite–greenstone blocks in the northwestern Sharyzhalgai uplift (Alar and Shumikha plutons) ( Turkina and Kapitonov, 2017 ). In contrast to these granitoids...

.... In the latitudinal section across the strike of the zone of the Baikal-Yenisei fault, a system of tilted blocks forms along the regional shear zones. They include microblocks 33, 37–43, and 46 along the southern side of the Shumikha fault and microblocks 67–70, and 79 along the southern side of the Kan-Atamanovo...