Figure 2. Schematic map showing the positions of the main structural
elements of the southern Siberian Craton and the distribution of
the geological complexes associated with various processes of the
Neoproterozoic Supercontinent evolution:
1 - Late Riphean basite dike swarms (Nersa Complex); 2 - Middle
Riphean basite dike swarms: a) Angaul Complex, b) Chaia complex;
3 - basic volcanic rocks (Middle Riphean); 4 - carbonatesclastic
deposits of the passive margin (Middle Riphean, Patoma Zone);
5 - Late Riphean carbonate-clastic rocks of the passive margin
and transitional to collision-related rocks; denoted by letters
are the following collision zones: Lena zone (L), Baikal-Patoma
zone (B-P), Baikal zone (B), Sayan Zone (S); 6 - metamorphic
rocks supposed to be those of the passive margin and combined
tectonically with the fragments of island-arc rocks
(Kh - Khamardaban; K - Kitoi; D - Derba); 7-9 - ophiolite
belts: 7 - Middle-Late Riphean (1.1-0.8 billion years)
(I - Ilchir), 8 - Late Riphean-Vendian (0.7-0.55 billion
years) (D - Dzhida), 9 - Middle-Late Riphean and Late Riphean
Vendian (BM - Baikal-Muya); 10 - Early Precambrian terranes in a
foldbelt (G - Gargan, M - Muya, Am - Amalat);
11a - present-day boundary of the Siberian Craton based on
geological and geophysical data without its Phanerozoic
sedimentary cover; 11b - various faults and boundaries between
the geological complexes; 12 - Sayan-Baikal Foldbelt.
Major structural elements in the margin of the Siberian
Craton: A - Akitka volcanoplutonic belt, B - Biryusa
Block, N - Necher High, Pr - Primorskaya Zone, T - Tonod High,
U - Ukuchikta Block, UT - Urik-Tumanshet Zone, Ch - Chuya
High, Sh - Sharyzhalgai basement protrusion;
Major provinces: I - Tunguska, II - Anabar, III - Aldan.
Black rectangles with figures denote the sites of detailed
survey and the numbers of the figures given in the text.