The aptness for Fe2∈+∈ → Fe 3∈+∈ changes in claystones may indicate the possibility for various coupled redox processes. Boda Claystone samples were studied from this aspect. Variations in the Fe2∈+∈ and Fe 3∈+∈ ratios and changes in the coordination states of these ions were analysed in samples obtained from different depths (in between 23 and 80 m). The Fe2∈+∈ content is attributed primarily to ferrous iron located in chlorite. On the top region of the strata the Fe 3∈+∈ proportion increases and its coordination is modified. These changes are attributed to secondary transformations and partial weathering. Thus, Fe2∈+∈ in the Boda Claystone may probably participate other redox changes as well.
- Boda Claystone
- Clay minerals
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry