Articles | Volume 33, issue 5
Eur. J. Mineral., 33, 605–620, 2021
https://doi.org/10.5194/ejm-33-605-2021
Eur. J. Mineral., 33, 605–620, 2021
https://doi.org/10.5194/ejm-33-605-2021

Research article 06 Oct 2021

Research article | 06 Oct 2021

Authigenic rhabdophane from brown iron ore of the oxidation zone of the Babaryk massive sulfide occurrence (South Urals): scanning electron microscope (SEM) and electron backscattered diffraction (EBSD) study

Elena V. Belogub et al.

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Short summary
We found Ca- and S-rich rhabdophane in the upper part of the oxidation zone of a sulfide occurrence, where it forms spherules up to 35 µm in size and aggregates in fractures in goethite. Its formation is probably associated with desorption of REEs from Fe3+ oxyhydroxides and clay minerals in the oxidation zone and the influx of P from the soil as well as from the precursor rocks. The enrichment with REE phosphate in the studied case is similar to that in REE regolith-hosted deposits.