...–Vitim batholith of 150,000 km 2 in area. At later stages, formation of geochemically distinct intrusive suites occurred with total or partial overlap in time. In the interval of 305–285 Ma two suites were emplaced: calc-alkaline granitoids with decreased SiO 2 content (the Chivyrkui suite of quartz...

... of the Chivyrkui complex and transitional from calc-alkaline to alkaline granites and quartz syenites of the Zaza complex formed. Like the earlier Barguzin granites, these rocks belong mainly to high-K calc-alkaline series ( Fig. 2 a , b ), with K > SiO 2 , potassium content is slightly higher than Barguzin...

... was postorogenic, but it was initiated and influenced by the mantle plume. Synplutonic intrusions, CD, and mafic inclusions of basic rocks are observed mainly in the quartz syenites and monzonitoids of the Chivyrkui, Zaza, and Lower Selenga complexes ( Litvinovsky et al., 1995a ,b) but are not detected...

... in the period 330–280 Ma. The formation of the Barguzin granites significantly overlapped in time (305–285 Ma) with the origin of high-K calc-alkaline quartz monzonites, quartz syenites, and gabbroids of the Chivyrkui Complex and transitional calc-alkaline to alkali leucogranites and quartz syenites...

... intrusive series with synplutonic basites (Lower Selenga complex, 285–278 Ma); 3 , granites and quartz syenites with synplutonic basites (Zaza complex, 305–285 Ma); 4 , calc-alkalic quartz syenites, quartz monzonites, and gabbroids (Chivyrkui complex, 305–285 Ma); 5 , calc-alkalic granites (Barguzin...

... quartz monzonites Southwestern part of the batholith (Golondokon River basin) U-Pb 291.7 ± 1 Yarmolyuk et al., 1997a Mama-Oron complex 19 Granites and pegmatites Northern part of the batholith (right bank of the Vitim River) U-Pb 354 ± 12 322 ± 5 Neimark et al., 1990 Chivyrkui...