Abstract
Mineralogical and geochemical features of magnesia-ferruginous carbonates of the Avzyan ore region of the Southern Ural in connection with metasomathosis regularities
Highlights
Certain important to the industry minerals are carbonate magnesian-ferruginous metasomatites
The presented materials show that in the southern part of the Bashkir meganticlinorium (BMA) in the meridionally elongated zone represented by carbonate rocks of the Minyak subsuite of the Suran Suite, one can find magnesian-ferruginous metasomatites of the Bogryashka ore occurrence that resemble the ferruginous magnesites of the Ismakaevo deposit located northward in the same subsuite
The metasomatites of Bogryashka differ by a variable polymineral composition, varying in amounts of ferrous magnesite, ferruginous dolomite, pyrite, quartz and, to a lesser extent, muscovite and chlorite
Summary
Certain important to the industry minerals are carbonate magnesian-ferruginous metasomatites. Minerals of the magnesite-siderite series are among the natural metasomatic formations: ferrous magnesite (breinerite), as well as ferruginous dolomite (ankerite), are a substrate for the formation of iron ore deposits of residual weathering crust. Carbonate deposits are developed in the upper parts of all three sedimentary series of Riphean and are confined to the structure of the Bashkir meganticlinorium (BMA) [1] They mainly contain shallow-water shelf limestones, less often horizons of early diagenetic evaporite dolomites. 22 km to the north of Ismakaevo village, in the same zone of the dolomites of the Minyak subsuite of the Suran Suite, there is the Suran fluorite deposit and several points of fluorite mineralization in the host dolomites Avzyan, drilling revealed a potent zone of breinerite metasomatites. 22 km to the north of Ismakaevo village, in the same zone of the dolomites of the Minyak subsuite of the Suran Suite, there is the Suran fluorite deposit and several points of fluorite mineralization in the host dolomites
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