Fractionation of Fe isotopes as a result of redox process in a basin

• This paper presents the results of a study of Fe isotope fractionation due to seasonal redox variations in water and bottom sediments (BS) of fresh-water basins. Fe isotopic ratios were measured using multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS). The investigation of suspended matter (SM) at the oxic-anoxic interface showed a significant positive shift in δ56Fe values between anoxic waters with dissolved Fe(II) and SM after Fe(II) oxidation and precipitation of Fe(III) oxides. Data on Fe content and isotope composition suggest that Fe(II) oxidation is accompanied by equilibrium Fe isotope fractionation. Potentials and limitations of the use of Fe isotope data for the reconstruction of pre-existing geochemical conditions in basins are outlined

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)

Nyckelord

Applied Geology

Tillämpad geologi

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)