摘要
The most of large industrial polymetallic (Zn-P b-C u) deposits of South Siberia region were formed at the early preorogenic stages of zonal Central Asian Mobile Belt, that was related to the Paleoasian Ocean evo lution and has multistage accretionary nature. The main epochs of manifestation of the polymetallic deposits are: the Upper-Proterozoic (Riphean), the Early-P aleozoic (Cambrian), the Middle-Paleozoic(Devonian-Carboniferous). There are three groups of geodynamic environments of the polymetallic and pyr ite-plymetallic deposits manifestation. They are: 1)Pericratonal subsidences an d riftogenic structures of the Riphean continental margin of the Siberian Platfor m; 2) Island-arc systems of Early-Paleozoic and Middle-Paleozoic age that wer e f ormed on the margins of Siberian continent and microcontinents (Bargusin. Tuva- Mongolian, Altai-Mogolian); 3)Marginal-continental volcano-plutonic belts. The formation of the majority of mentioned deposits is related to the mantle- crustal ore-magmatic systems, including volcanic and subvolcanic differentiated bazaltoid compexes, porphyry intrusions and dyke swarms. The connection if stra tiform Pb-Zn deposits in carbonate-terrigene sequences with volcanic processes is in most cases paragenetic or ambiguous.
The most of large industrial polymetallic (Zn-P b-C u) deposits of South Siberia region were formed at the early preorogenic stages of zonal Central Asian Mobile Belt, that was related to the Paleoasian Ocean evo lution and has multistage accretionary nature. The main epochs of manifestation of the polymetallic deposits are: the Upper-Proterozoic (Riphean), the Early-P aleozoic (Cambrian), the Middle-Paleozoic(Devonian-Carboniferous). There are three groups of geodynamic environments of the polymetallic and pyr ite-plymetallic deposits manifestation. They are: 1)Pericratonal subsidences an d riftogenic structures of the Riphean continental margin of the Siberian Platfor m; 2) Island-arc systems of Early-Paleozoic and Middle-Paleozoic age that wer e f ormed on the margins of Siberian continent and microcontinents (Bargusin. Tuva- Mongolian, Altai-Mogolian); 3)Marginal-continental volcano-plutonic belts. The formation of the majority of mentioned deposits is related to the mantle- crustal ore-magmatic systems, including volcanic and subvolcanic differentiated bazaltoid compexes, porphyry intrusions and dyke swarms. The connection if stra tiform Pb-Zn deposits in carbonate-terrigene sequences with volcanic processes is in most cases paragenetic or ambiguous.
