Geochemical characteristics of metasomatically altered rocks in the Kryvbas

Language: Russian
Geochemistry and ore formation 2013, 33: 42-52

https://doi.org/10.15407/gof.2013.33.042

The article demonstrates results on geochemical investigations of metasomatic alterations in the rocks of the New Kryvy Rig, Skelevatsk, Saxagan and Gdantsi suits of the Kryvy Rig series. Position of metasomatic zones and specification of metasomatism manifestations are controlled by a number of lithological and structural-tectonical factors.
Distribution of the zones is definitely regular with their restriction to the locations of tectonic dislocations, brecciation, movements, interlaminar shifts, microfolding and cracking which served as the most favorable ways for circulation of hydrothermal solutions resulting in alterations of the host rocks and minerals but also in introduction, redistribution and accumulation of the ore elements. In the metasomatically altered rocks, the metasomatism occurs in narrow local zones from some meters up to some tens meters in thickness but also form areal transformations of the rocks some hundreds meters in thickness. Anomalous concentrations of Au, Cu, Zn, Pb, Ti, Cr, Ni, Sr, Ba, Zr, V, Rb and Ce were identified in the metasomatic zones. The article includes a short description of major minerals and sulfides of the metasomatically altered rocks.

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