PHYSICOCHEMICAL FORMATION CONDITIONS OF SEAFLOOR HEMATITE-QUARTZ EDIFICES OF THE EAST MAGNITOGORSK PALEOISLAND ARC, SOUTH URALS

Abstract

There are a lot of ferriferous–siliceous sediments in the Paleozoic island-arc complexes of the South Urals. They are combined with massive sulfide and gold-bearing deposits. Similar rocks are known in ore fields of the South Urals, Central Asian, Caucasus, and Pyrenees fold belts. Hematite–quartz rocks are the variety of ferriferous–siliceous sediments. There are two main groups of hematite–quartz bodies: (1) halmyrolitical beds associated with hyaloclasts and mounds occurring in the roof of volcanogenic strata and siliceous sediments. According to geological and geochemical data, it is suggested that they have a hydrothermal genesis. The object of study is a determination of forming conditions for edifices at the southern flank of the East Magnitogorsk paleoisland arc based on fluid inclusion study. Such researches were made for the first time for hematite–quartz rocks of ore areas.