fig02.htm

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.


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