Species of As and Au in secondary dispersion halos of the Piilola gold occurrence in East Finland

Sergeev A. V., Korshunova V. A.,Semenova V, V., Charykova M. V.

Pages 61‑74

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2015. V. 144. N 6. P. 61-74

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Language: Russian


The study is an attempt to consider routes of arsenic and gold geochemical migration and the patterns of their concentration in loose sediments above the rocks of the ore deposit in Eastern Finland. To solve this problem, the method of phase chemical analysis has been modified allowing to identify the dominant element species. As a result of carried out experiments, it has been found that the major species of arsenic are anion (specifically adsorbed) and species binding with oxides and hydroxides of Fe, Mn in layers of loose sediments, including the ground moraine. Analysis of the gold species distribution within layers of loose sediments has shown the conversion in balance of mobile and inert species in transition from the ground moraine up through the soil layers.

Key words: sequential extraction, soil, ground moraine, arsenic, gold.