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].
Zoom image