Institute of Natural Resources;
Ecology & Cryology SB RAS;
Chita 672090;
Russian 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.;