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Journal Article

Stages and conditions of metamorphism of mafic granulites in the Early Precambrian complex of the Angara–Kan terrane (southwestern Siberian Craton) Available to Purchase

O.M. Turkina, V.P. Sukhorukov
Published: 01 November 2015
Russ. Geol. Geophys. (2015) 56 (11): 1544–1567.
DOI: https://doi.org/10.1016/j.rgg.2015.10.004
...O.M. Turkina; V.P. Sukhorukov Abstract We present results of study of mineral assemblages and PT -conditions of metamorphism of mafic garnet–two-pyroxene and two-pyroxene granulites in the Early Precambrian metamorphic complex of the Angara–Kan terrane as well as the U–Pb age and trace-element...
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View PDF for article title, Stages and conditions of metamorphism of mafic granulites in the Early Precambrian complex of the <span class="search-highlight">Angara</span>–<span class="search-highlight">Kan</span> <span class="search-highlight">terrane</span> (southwestern Siberian Craton)
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Geological sketch map of the Angara–Kan terrane (Yenisei Ridge). Compiled with the use of data from (Nozhkin and Turkina, 1993; Vernikovskaya et al., 2010). 1, overlying Phanerozoic (a) and Neoproterozoic (b) sediments; 2, ophiolite and island-arc complexes of the Predivinsk terrane (NP3); 3–5, metamorphic complexes of the Angara–Kan terrane: 3, metasedimentary–volcanic and 4, essentially metasedimentary rocks of the Yenisei amphibolite–gneiss (PP4) and 5, Kan granulite–gneiss (AR?) complexes; 6, alkali syenites and trachytes (T1-2), as well as rhyolites and leucogranites (D2), of the Severnyi volcanotectonic depression; 7, granitoids of the Lower Kan massif (O3); 8, syenites and granites of the Posol’naya massif (Є1-2); 9, subalkalic granites and leucogranites of the Chistopol’e massif (NP2); 10, subalkalic granites, leucogranites (PP4), 11, gneissic granites, plagiogranites, and porphyritic granites (PP3) of the Taraka massif; 12, faults (a) and thrusts (b); 13, unconformity (a) and other (b) boundaries; 14, sampling sites for U–Pb dating. I, Angara–Kan terrane; II, Predivinsk terrane. Inset shows the contours of the map from Fig. 1.

Geological sketch map of the Angara–Kan terrane (Yenisei Ridge). Compiled w... Available to Purchase

Published: 01 February 2016
Fig. 1. Geological sketch map of the Angara–Kan terrane (Yenisei Ridge). Compiled with the use of data from ( Nozhkin and Turkina, 1993 ; Vernikovskaya et al., 2010 ). 1 , overlying Phanerozoic ( a ) and Neoproterozoic ( b ) sediments; 2 , ophiolite and island-arc complexes of the Predivinsk
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Geological sketch map of the northern Angara–Kan terrane (Yenisei Ridge), compiled by A.D. Nozhkin (2014). 1, overlying Phanerozoic (a) and Neoproterozoic (b) sediments; 2, Neoproterozoic ophiolite and island-arc complexes of the Predivinsk terrane; 3–5, Early Precambrian metamorphic complexes of the Angara–Kan terrane: 3, metasedimentary–volcanic and 4, essentially metasedimentary rocks of the Yenisei amphibolite–gneiss complex; 5, the Kan granulite– gneiss complex; 6, granitoids of the Belaya Rechka massif (NP2?); 7, syenites and granites of the Posol’naya massif (Є1-2); 8, subalkalic granites and leucogranites of the Chistoe Pole massif (NP2); 9, subalkalic granites and leucogranites (PP4) and 10, gneiss-granites, plagiogranites and porphyritic granites (PP3) of the Taraka pluton; 11, faults (a), thrusts (b); 12, unconformity boundaries (a), other boundaries (b); 13, sampling sites. Inset shows the contours of the map in Fig. 1.

Geological sketch map of the northern Angara–Kan terrane (Yenisei Ridge), c... Available to Purchase

Published: 01 November 2015
Fig. 1. Geological sketch map of the northern Angara–Kan terrane (Yenisei Ridge), compiled by A.D. Nozhkin (2014). 1 , overlying Phanerozoic ( a ) and Neoproterozoic ( b ) sediments; 2 , Neoproterozoic ophiolite and island-arc complexes of the Predivinsk terrane; 3 – 5 , Early Precambrian
Journal Article

Late Paleoproterozoic volcanic associations in the southwestern Siberian craton ( Angara–Kan block ) Available to Purchase

A.D. Nozhkin, O.M. Turkina, I.I. Likhanov, N.V. Dmitrieva
Published: 01 February 2016
Russ. Geol. Geophys. (2016) 57 (2): 247–264.
DOI: https://doi.org/10.1016/j.rgg.2016.02.003
...Fig. 1. Geological sketch map of the Angara–Kan terrane (Yenisei Ridge). Compiled with the use of data from ( Nozhkin and Turkina, 1993 ; Vernikovskaya et al., 2010 ). 1 , overlying Phanerozoic ( a ) and Neoproterozoic ( b ) sediments; 2 , ophiolite and island-arc complexes of the Predivinsk...
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View PDF for article title, Late Paleoproterozoic volcanic associations in the southwestern Siberian craton ( <span class="search-highlight">Angara</span>–<span class="search-highlight">Kan</span> block )
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Journal Article

TECTONICS AND EVOLUTION OF GRANITOID MAGMATISM IN THE YENISEI RIDGE Available to Purchase

V.A. Vernikovsky, A.E. Vernikovskaya
Published: 01 January 2006
Russ. Geol. Geophys. (2006) 47 (1): 35–52.
...–630 Ma. The earliest event was associated with high-grade metamorphism (granulite to amphibolite facies) and emplacement of the Taraka granites within the Angara-Kan terrane. The following event occurred at 880–860 Ma, but the Eruda, Kalamy, and Teya granites had rather emplaced beyond the Yenisei...
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View PDF for article title, TECTONICS AND EVOLUTION OF GRANITOID MAGMATISM IN THE YENISEI RIDGE
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Journal Article

Isotope Lu–Hf composition of detrital zircon from paragneisses of the Sharyzhalgai uplift: evidence for the Paleoproterozoic crustal growth Available to Purchase

O.M. Turkina, N.G. Berezhnaya, V.P. Sukhorukov
Published: 01 July 2016
Russ. Geol. Geophys. (2016) 57 (7): 1016–1026.
DOI: https://doi.org/10.1016/j.rgg.2016.06.002
... through the contribution of juvenile material took place. On the southwestern margin of the Siberian craton, detrital zircons with ages of ~2.3–2.4 and 1.95–2.0 Ga are widespread in Paleoproterozoic paragneisses of the Irkut and Angara–Kan terranes and in terrigenous rocks of the Urik–Iya graben, which...
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View PDF for article title, Isotope Lu–Hf composition of detrital zircon from paragneisses of the Sharyzhalgai uplift: evidence for the Paleoproterozoic crustal growth
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Ar-Ar age spectra of micas from the Yenisei suture zone: biotites (a, b) from paragneisses of the western part of the Angara–Kan terrane (samples PR-07-26, PR-07-45) and muscovite (c) from a leucogranite (sample PR-07-36) in the NW part of the Predivinsk terrane.

Ar-Ar age spectra of micas from the Yenisei suture zone: biotites ( a , b ... Available to Purchase

Published: 01 May 2010
Fig. 9. Ar-Ar age spectra of micas from the Yenisei suture zone: biotites ( a , b ) from paragneisses of the western part of the Angara–Kan terrane (samples PR-07-26, PR-07-45) and muscovite ( c ) from a leucogranite (sample PR-07-36) in the NW part of the Predivinsk terrane.
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Diagram (Na2O + K2O)–SiO2 for the volcanics of the Yenisei complex (Angara–Kan terrane). Associations: 1, metaandesite–dacite–trachyrhyodacite; 2, metabasalt–leucobasalt; 3, metabasalt–andesite-basalt–trachyandesite; 4, metabasalt.

Diagram (Na 2 O + K 2 O)–SiO 2 for the volcanics of the Yenisei complex (A... Available to Purchase

Published: 01 February 2016
Fig. 2. Diagram (Na 2 O + K 2 O)–SiO 2 for the volcanics of the Yenisei complex (Angara–Kan terrane). Associations: 1 , metaandesite–dacite–trachyrhyodacite; 2 , metabasalt–leucobasalt; 3 , metabasalt–andesite-basalt–trachyandesite; 4 , metabasalt.
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T–εHf diagram for zircons from Paleoproterozoic paragneisses and Archean granulites of the Irkut terrane. Paragneisses: 1, garnet–cordierite–biotite, 2, orthopyroxene–biotite; 3, Neoarchean granulite of intermediate and felsic composition; 4, Paleoarchean granulite; 5, garnet–two-pyroxene mafic granulite of the Angara–Kan terrane. Dash lines mark the field of isotope evolution of the Archean crust of the Irkut terrane at 176Lu/177Hf = 0.015.

T – ε Hf diagram for zircons from Paleoproterozoic paragneisses and Arche... Available to Purchase

Published: 01 July 2016
, garnet–two-pyroxene mafic granulite of the Angara–Kan terrane. Dash lines mark the field of isotope evolution of the Archean crust of the Irkut terrane at 176 Lu/ 177 Hf = 0.015.
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A tectonic scheme of the Sayan-Yenisei thrust-folded area. 1 — Sharyzhalgai terrane, granulite-gneiss complexes (AR-PR); 2 — Biryusa terrane, granulite-amphibolite complexes (AR?-PP); 3 — Angara-Kan terrane, granulite-amphibolite complexes (PP); 4 — East Angara terrane, terrigenous-carbonate deposits of passive continental margin (NP); 5 — Central Angara terrane, metamorphosed from greenschist to amphibolite mainly flysch facies (MP?-NP); 6 — metamorphosed from greenschist to amphibolite facies, chiefly, volcanic and volcanosedimentary series (PP) of the Tumanshet, Urik-Iya, and Onot terranes; 7 — undifferentiated complexes of Derba terrane; 8 — undifferentiated complexes of Kan terrane; 9 — Panimba ophiolite belt (MP-NP?); 10 — overlying predominantly molassa complexes (NP2–3); 11 — predominantly carbonate deposits (NP2–3); 12 — island-arc complexes and associated ophiolites (NP2) of the Yenisei belt — Isakovka and Predivinsk island-arc terranes; 13 — island-arc and volcanosedimentary complexes of East Sayan (NP2?); 14 — overlying predominantly volcanogenic and volcanosedimentary series (D) of Agul trough; 15 — overlying Phanerozoic predominantly sedimentary complexes; 16 — granitoids of Taraka and Sayan complexes (PP3); 17 — syn- and postcollisional granitoids of Teya and Eruda complexes (NP1); 18 — syn- and postcollisional granitoids of Ayakhta and Glushikha complexes (NP2); 19 — main faults. Boxed are areas of paleomagnetic studies: 1 — Sayan trough, Biryusa Sayan region, 2 — Predivinsk area, 3 — Ust’-Angara area.

A tectonic scheme of the Sayan-Yenisei thrust-folded area. 1 — Sharyzhalg... Available to Purchase

Published: 01 January 2007
Fig. 2. A tectonic scheme of the Sayan-Yenisei thrust-folded area. 1 — Sharyzhalgai terrane, granulite-gneiss complexes (AR-PR); 2 — Biryusa terrane, granulite-amphibolite complexes (AR?-PP); 3 — Angara-Kan terrane, granulite-amphibolite complexes (PP); 4 — East Angara terrane
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Scheme of fault tectonics and granitoid magmatism in the Transangarian segment of the Yenisei Ridge, based on Kachevsky et al. (1998), Vernikovsky et al. (2003), Vernikovsky et al. (2009). 1, Teya complex collisional granitoids (883–861 Ma); 2, Ayakhta complex syncollisional granites and leucogranites (761–749 Ma) (a), Glushikha complex postcollisional leucogranites (752–718 Ma) (b); 3, Tatarka active margin complex: alkaline and nepheline syenites, ijolites, urtites, trachytes and carbonatites (711–630 Ma); 4, ophiolites of the Isakovka (NP3) and Rybny–Panimba (MP) belts; 5, upthrows and thrusts; 6, normal faults; 7, established sinistral strike-slip component in faults; 8, identified and inferred faults; 9, largest faults and sutures; Colored ovals contain U–Pb zircon ages of granitoids in Ma (from Vernikovskaya et al., 2002, 2003, 2004, 2006; 2007; Vernikovsky et al., 2002, 2003, 2007; Postnikov et al., 2005; and this study). Fault zones: An, Angara; P, Priyenisei; I, Ishimba; T, Tatarka; A, Ankinov; K, Kovdor. Inset: Is, Isakovka terrane; II, Central Angara terrane; III, East Angara terrane; IV, Predivinsk terrane; V, Angara Kan terrane. Dashed field, Tatarka–Ishimba suture zone. 1, terrane boundaries.

Scheme of fault tectonics and granitoid magmatism in the Transangarian segm... Available to Purchase

Published: 01 January 2016
; 2007 ; Vernikovsky et al., 2002 , 2003 , 2007 ; Postnikov et al., 2005 ; and this study). Fault zones: An, Angara; P, Priyenisei; I, Ishimba; T, Tatarka; A, Ankinov; K, Kovdor. Inset: Is, Isakovka terrane; II, Central Angara terrane; III, East Angara terrane; IV, Predivinsk terrane; V, Angara Kan
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PT-conditions of metamorphism for the mafic granulites of the Angara–Kan terrane. Solid and dashed crosses show the PT-conditions estimated in the THERMOCALC and TWQ software, respectively, for samples: 1, 46-09; 2, 34-09; 3, 44-09. The Grt-in lines were calculated in the Perplex 668 software; circled numbers show samples: 1, 46-09; 2, 34-09; 3, 44-09; 4, 48-09; 5, 37-09. The modeling was carried out in the NCFMAST system with the use of garnet, orthopyroxene, clinopyroxene (Holland and Powell, 1996), and plagioclase (Fuhrman ans Lindsley, 1988) mixing models. I and II, Grt-in lines for olivine and quartz tholeiites, respectively, and solidus, after (Ringwood, 1975). Arrow indicates the probable retrograde trend for the mafic granulites.

PT -conditions of metamorphism for the mafic granulites of the Angara–Kan t... Available to Purchase

Published: 01 November 2015
Fig. 12. PT -conditions of metamorphism for the mafic granulites of the Angara–Kan terrane. Solid and dashed crosses show the PT -conditions estimated in the THERMOCALC and TWQ software, respectively, for samples: 1, 46-09; 2, 34-09; 3, 44-09. The Grt-in lines were calculated in the Perplex 668
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The geological setting of Precambrian and Phanerozoic igneous complexes of the South Yenisei Ridge, with use of geological materials and geochronological data. After (Vernikovskaya et al., 2004) with additions. 1, overlapping Phanerozoic (a) and Neoproterozoic (b) deposits; 2, ophiolites and island arc complexes of the Predivinsk terrane (NP3); 3–5, metamorphic complexes of the Angara–Kan terrane: 3, Yenisei amphibolite-gneissic (PP); 4, Ataman granulite-gneissic (PP); 5, Kuzeev granulite-metabasite-gneissic (PP); 6, rhyolites, tuff breccias, lava breccias, ignimbrites, leucogranites (D2), alkaline syenites and alkaline trachytes (T1-2) of the Severnaya volcanic-tectonic depression; 7, Nizhnekan pluton granitoids (O3); 8, Posol’naya pluton syenites and granites (C−1-2); 9, Chistopol’ pluton subalkaline granites, leucogranites (NP2); 10, Taraka pluton granodiorites, granites, low-alkaline granites and sub-alkaline granites (PP). 11, faults (a), thrusts (b); 12, Yenisei fault. The dotted line on the inset shows the boundaries of the geological scheme.

The geological setting of Precambrian and Phanerozoic igneous complexes of ... Available to Purchase

Published: 01 May 2010
, ophiolites and island arc complexes of the Predivinsk terrane (NP 3 ); 3 – 5 , metamorphic complexes of the Angara–Kan terrane: 3 , Yenisei amphibolite-gneissic (PP); 4 , Ataman granulite-gneissic (PP); 5 , Kuzeev granulite-metabasite-gneissic (PP); 6 , rhyolites, tuff breccias, lava breccias
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Geology and structure of the Zimoveinyi massif of the South Yenisei Ridge (Kachevsky, 2003; Shneider, 1965). 1, Meso-Cenozoic deposits; 2, Paleoproterozoic amphibolites, ortho-and paragneisses, marbles of the Angara–Kan terrane(?); 3, Priyenisei tectonic zone: cataclasites, milonites (a), blocks of hypersthene-feld-spar-garnet gneisses (PP3?) (b); 4, Kovdor tectonic zone: cataclasites, milonites (a), amphibolites, ortho- and paragneisses, marbles (PP3?) (b); 5, Cambrian–Ordovician granitoid intrusions of the Posol’ny collisional complex(?); 6, garnet granulites of intermediate and acidic composition; 7, orthometamorphic rocks of amphibolite and granulite facies: metabasalts with metaandesites interbeds (a), metagabbro (b); 8, adakite dikes; 9, layered gabbro intrusions: gabbro-anorthosites, pyroxenites; 10, cataclasites and mylonites with metabasites relicts; 11, main fault: identified (a), inferred (b); 12, other faults: identified (a), inferred (b); 13, boundaries of metamorphic strata; 14, foliation attitude: inclined (a), subvertical (b); 15, sampling sites for geochronology. Numbers in white rectangles show U/Pb ages of zircons from igneous rocks.

Geology and structure of the Zimoveinyi massif of the South Yenisei Ridge (... Available to Purchase

Published: 01 October 2017
Fig. 2. Geology and structure of the Zimoveinyi massif of the South Yenisei Ridge ( Kachevsky, 2003 ; Shneider, 1965 ). 1 , Meso-Cenozoic deposits; 2 , Paleoproterozoic amphibolites, ortho-and paragneisses, marbles of the Angara–Kan terrane(?); 3 , Priyenisei tectonic zone: cataclasites
Journal Article

The geodynamic evolution of the folded framing and the western margin of the Siberian craton in the Neoproterozoic: geological, structural, sedimentological, geochronological, and paleomagnetic data Available to Purchase

V.A. Vernikovsky, A.Yu. Kazansky, N.Yu. Matushkin, D.V. Metelkin, J.K. Sovetov
Published: 01 April 2009
Russ. Geol. Geophys. (2009) 50 (4): 380–393.
DOI: https://doi.org/10.1016/j.rgg.2009.03.014
... zone may be illustrated by its southern termination, at the junction of the Predivinsk and Angara–Kan terranes of the Yenisei Ridge ( Figs. 1 and 6 ). Study was given to the deformed rocks of the island-arc and ophiolite complexes of Neoproterozoic age in the Predivinsk terrane and deformed gneisses...
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View PDF for article title, The geodynamic evolution of the folded framing and the western margin of the Siberian craton in the Neoproterozoic: geological, structural, sedimentological, geochronological, and paleomagnetic data
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Geological schemes of the Srednetatarka (a) and Yagodka (b) alkaline plutons, after (Glazyrin and Vrublevich, 1967; Kachevsky et al., 1998; Savanovich and Sergeeva, 1970; Sveshnikova et al., 1976). 1, sedimentary cover: clays, sands, sand loams, gravels (Pg3–N1); 2, Shirokinsk series, Sukhokhrebtinsk (Kirgiteisk) Formation: argillaceous schists, metasandstones, trachybasalts (NP1–2); 3–5, Tokminsk (Gorevka) Formation limestones (NP): 3, Lower Subformation, 4, Middle Subformation, 5, Upper Subformation; 6, Kuzeevsky complex of the Angara–Kan terrane: plagiogneisses, gneisses (PP3); 7–10, Tatarka magmatic complex: 7, granites, gneiss-granites, A-type leucogranites, 711–683 Ma; 8–9, Srednetatarka pluton alkaline and nepheline syenites (8) and ijolites (9), 711 Ma; 10, Yagodka pluton alkali feldspar syenites, alkaline quartz syenites, trachybasalts, 691 Ma; 11, contact metamorphism aureoles; 12, carbonate xenoliths (a) and terrigeneous-carbonate metaschists and limestones xenoliths (b); 13, unconformable boundaries; 14, verified fault (a), inferred fault (b), upthrow (c); 15, bedding; 16, sampling sites for U/Pb geochronological studies.

Geological schemes of the Srednetatarka (a) and Yagodka (b) alkaline pluton... Available to Purchase

Published: 01 November 2012
series, Sukhokhrebtinsk (Kirgiteisk) Formation: argillaceous schists, metasandstones, trachybasalts (NP 1–2 ); 3–5, Tokminsk (Gorevka) Formation limestones (NP): 3, Lower Subformation, 4, Middle Subformation, 5, Upper Subformation; 6, Kuzeevsky complex of the Angara–Kan terrane: plagiogneisses, gneisses
Journal Article

Middle Paleozoic and Early Mesozoic anorogenic magmatism of the South Yenisei Ridge: first geochemical and geochronological data Available to Purchase

A.E. Vernikovskaya, V.A. Vernikovsky, N.Yu. Matushkin, I.V. Romanova, N.G. Berejnaya, A.N. Larionov, A.V. Travin
Published: 01 May 2010
Russ. Geol. Geophys. (2010) 51 (5): 548–562.
DOI: https://doi.org/10.1016/j.rgg.2010.04.010
...Fig. 9. Ar-Ar age spectra of micas from the Yenisei suture zone: biotites ( a , b ) from paragneisses of the western part of the Angara–Kan terrane (samples PR-07-26, PR-07-45) and muscovite ( c ) from a leucogranite (sample PR-07-36) in the NW part of the Predivinsk terrane. ...
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View PDF for article title, Middle Paleozoic and Early Mesozoic anorogenic magmatism of the South Yenisei Ridge: first geochemical and geochronological data
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Geographic position and geological scheme of the lower reaches region of the Vorogovka R. in the northwest of the Isakovka terrane modified from [Kachevsky et al., 1998; Vernikovsky et al., 2003; Sovetov and Le Heron, 2016]. Circled numbers show terranes: 1 – Isakovka, 2 – Central Angara, 3 – East Angara, 4 – Predivinsk, 5 – Angara-Kan.

Geographic position and geological scheme of the lower reaches region of th... Open Access

Published: 01 April 2025
– Central Angara, 3 – East Angara, 4 – Predivinsk, 5 – Angara-Kan.
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Schematic map and cross section, illustrating the large-scale geologic architecture of the Yenisei Ridge. Fault zones: An = Angara, A = Ankinov, Is = Ishimba, P = Priyenisei, T = Tatarka. Terranes: I = Isakovka, II = Central Angara, III = East Angara, IV = Predivinsk, V = Angara Kan. Modified after Vernikovsky et al. (2016) and Vernikovsky and Vernikovskaya (2006). A more detailed intermediate-scale geologic map is provided in Appendix 1 (Fig. A1).

Schematic map and cross section, illustrating the large-scale geologic arch... Open Access

Published: 01 May 2021
Fig. 4. Schematic map and cross section, illustrating the large-scale geologic architecture of the Yenisei Ridge. Fault zones: An = Angara, A = Ankinov, Is = Ishimba, P = Priyenisei, T = Tatarka. Terranes: I = Isakovka, II = Central Angara, III = East Angara, IV = Predivinsk, V = Angara Kan
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Schematic geological map of the Angara–Kan block (Yenisei Ridge), modified after Nozhkin and Turkina (1993), Popov (2001), and Vernikovskaya et al. (2010). 1, overlying Phanerozoic (a) and Neoproterozoic (b) sediments; 2, ophiolite and island-arc complexes of the Predivinsk terrane (NP3); 3–5, metamorphic complexes of the Angara–Kan block: 3, metavolcanosedimentary, 4, essentially metasedimentary rocks of the Yenisei schist-gneiss (PP4), 5, Kan granulite-gneiss (AR?) complexes; 6, alkaline syenites and trachytes (T1–2), rhyolites and leucogranites (D2) of the Severnyi volcanotectonic depression; 7, granitoids of the Nizhnii Kan pluton (O3); 8, porphyroblastic gneissic granites, granites, syenites of the Posol’nyi pluton (PP4?, Є1–2); 9, subalkaline granites, leucogranites of the Chistoe Pole pluton (NP2); 10, subalkaline granites, leuco-granites (PP4); 11, gneissic granites, plagiogranites, porphyritic granites (PP3) of the Taraka pluton;12, faults (a), thrusts (b); 13, unconformity (a), other boundaries (b); 14, sampling sites for U–Pb dating of volcanics (a), granites (b) and sedimentary rocks (c). I, Angara–Kan block; II, Predivinsk terrane. Inset shows the contours of the map in Fig. 1.

Schematic geological map of the Angara–Kan block (Yenisei Ridge), modified ... Available to Purchase

Published: 01 October 2019
terrane (NP 3 ); 3–5 , metamorphic complexes of the Angara–Kan block: 3 , metavolcanosedimentary, 4 , essentially metasedimentary rocks of the Yenisei schist-gneiss (PP 4 ), 5 , Kan granulite-gneiss (AR?) complexes; 6 , alkaline syenites and trachytes (T 1–2 ), rhyolites and leucogranites (D 2