Physical-Chemical Study of the Vein Carbonates of the Vorontsovskoe Gold Deposit

E. I. Soroka, M. E. Pritchin, O. B. Azovskova, M. Yu. Rovnushkin, V. P. Lutoev, I. V. Smoleva

Abstract


A carbonate (calcite and dolomite) vein mineralization of the ore-bearing rocks of the Vorontsovskoe gold deposit (Northern Urals) was studied. Isotopic analysis of carbonates shows a trend toward the lightening of C and O isotopic composition from limestones to hydrothermal altered and magmatic rocks. Electron Paramagnetic Resonance study of carbonates showed that they differs in a width of Mn2+ spectrum because of structure defects. The C and O composition lightening corresponds to the carbonates with strong defects of structure which was formed by an ore-bearing fluid. In the carbonates, 3 types of rare-earth elements composition trends were observed: 1 – with negative Ce-anomaly; 2 – with positive Eu-anomaly; 3 – without anomalies. A negative Ceanomaly possibly is related to the marine sediments, a positive Eu-anomaly suggests a magmatic origin of hydrothermal fluid.

Keywords


Vorontsovskoe gold deposit; ore-bearing breccias; carbonates; physicalchemical methods

References


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DOI: http://dx.doi.org/10.17072/psu.geol.17.1.41

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