SEDEX deposits are the most world important source of Zn, Pb and Ag. Brief world review. The main geological features. Prospects of Russia and Krasnoyarsk region

Nowadays the SEDEX deposits are the main world source of Zn (Pb, Ag). The ores of these deposits are complex and beside two main minerals: Zn and Pb, they have got Ag, Au, Cd, In, Cu, Sn, Sb, Bi, Se, Te which are extracted simultaneously. About 132 of SEDEX-type deposits are known in the world now. They are spread rather irregularly and there are several regions of their development according to their resources. The biggest Russian strata-bound Pb-Zn deposits in the clastic and clastic-carbonat rocks of “Siberian polymetallic belt” are similar to SEDEX deposits and they belong to the giant (more then 10 Mt Zn+Pb) deposits. On the territory of Russia the main prospects for discovery of the SEDEX deposits are connected with fold frame of the Siberian platform. Nowadays five areas with good prospects are known in the frame of the Siberian platform: North-Pribaikalsky, West-Verkhoyansky, Angaro-Yeniseisky, Taimyrozersky and East-Sayansky, the latest three of them being in Krasnoyarsk region.