fig01.htm

Figure 1. Paleotectonic sketch showing the southwestern Siberian craton (Late Vendian), modified after [Sovetov, 1977] and other sources.
1 - belt of foredeeps (Yenisei zone): I - Northern Yenisei (circled): I 1  - Western, I 2  - Eastern, I 3  - Terya; II - Southern Yenisei-Cis-Sayan: II 1  - Southern Yenisei, II 2  - Cis-Sayan; Baikal zone: III - Cisbaikalian; IY - Nyuya-Dzherba; 2 - region of forebulges (compensatory uplifts) and isostatic uplifts (arches), Anabar-Tunguska zone; Baikit-Nepa zone (squared): 1 - Baikit, 2 - Nepa; Middle Angara zone: 3 - Bratsk, 4 - Atovsky, 5 - Belsky; 3 - major oil and gas fields; 4 - local basins and foredeeps; 5 - local arches of forebulges; 6 - internal uplifts separating foredeeps (in triangles): 1 - Podkamennaya Tunguska, 2 - Udoronga, 3 - Kitoi, 4 - Northern Baikal; 7 - outer boundary (structural suture) of the Siberian craton, separating the belt of accreted terranes from the belt of cratonic margin uplifts (Cis-Sayan and Baikal-Patom zones); 8 - Mesozoic strike-slip faults; 9 - present-day boundary of cratonic cover; 10 - inferred direction of collision; 11 - belt of accreted terranes (Sayan and Transbaikalian zones); 12 - localities of radiometric dating of syncollisional metamorphism (1 - enderbites of the Nyurundikan assemblage [Amelin et al., 2000], 2 - hornblende-biotite plagiogneisses of the Shumikha assemblage and plagiogneisses (metadacites) of the Kansky greenstone belt [Rumyantsev et al., 2000] and trondhjemites of the Verkhnekansky Massif of the Kansky greenstone belt [Nozhkin et al., 2001].
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