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In southern framing of Siberian Platform, basite-ultrabasite intrusive complexes were forming over a long period of time (Early Proterozoic-Paleozoic Era) as a result of collisional and post-collisional processes. In Muja zone they formed mainly in island-arch geodynamic conditions, in Kodaro-Udokan zone-in continental. Most productive toward noble metals in Muja zones are basite-ultrabasites of the Dovyrensk complex, in Kodaro-Udokan basites of the Chiney complex. Gold in these formations has both mantle and crustal springs.
In southern framing of Siberian Platform, basite-ultrabasite intrusive complexes were formed over a long period of time (Early Proterozoic-Paleozoic Era) as a result of collisional and post-collisional processes. In Muja zone they formed mainly in island-arch geodynamic conditions , in Kodaro-Udokan zone-in continental. Most productive toward noble metals in Muja zones are basite-ultrabasites of the Dovyrensk complex, in Kodaro-Udokan basites of the Chiney complex. Gold in these formations has both mantle and crustal springs.