TY - JOUR

T1 - The Accumulation of the REE by Bacterial Fe Oxyhydroxide

AU - Фелицын, Сергей Борисович

AU - Алфимова, Надежда Аркадьевна

AU - Bogomolov, Eugene

PY - 2023/6/22

Y1 - 2023/6/22

N2 - Abstract: The current study was focused on Fe oxyhydroxides from the north-western part of the East-European platform. Modern-day Fe oxyhydroxides of bacterial origin demonstrate an enhanced concentration of rare earth elements (up to 1200 ppm), compared to samples without iron bacteria. The 143Nd/144Nd ratio in bacterial Fe oxyhydroxide has the value from 0.511532 to 0.512588 and corresponds to the geochemical signature of the waters, oxyhydroxides precipitated from. Samples of iron hydroxides from Quaternary and recent continental ore deposits with different Nd and Sr isotope composition were used for the laboratory reduction of Fe3+ up to emergence of magnetite (T ~ 1000°C). 143Nd/144Nd and 87Sr/86Sr ratios in the newly formed mineral phases show insignificant discrepancy with parent iron ore. The persistency of Sm–Nd and Rb–Sr isotope systems in the process of bog iron ore experimental melting permits it’s applying to paleoenvironment reconstructions and archaeometry.

AB - Abstract: The current study was focused on Fe oxyhydroxides from the north-western part of the East-European platform. Modern-day Fe oxyhydroxides of bacterial origin demonstrate an enhanced concentration of rare earth elements (up to 1200 ppm), compared to samples without iron bacteria. The 143Nd/144Nd ratio in bacterial Fe oxyhydroxide has the value from 0.511532 to 0.512588 and corresponds to the geochemical signature of the waters, oxyhydroxides precipitated from. Samples of iron hydroxides from Quaternary and recent continental ore deposits with different Nd and Sr isotope composition were used for the laboratory reduction of Fe3+ up to emergence of magnetite (T ~ 1000°C). 143Nd/144Nd and 87Sr/86Sr ratios in the newly formed mineral phases show insignificant discrepancy with parent iron ore. The persistency of Sm–Nd and Rb–Sr isotope systems in the process of bog iron ore experimental melting permits it’s applying to paleoenvironment reconstructions and archaeometry.

KW - East European Platform

KW - Rare earth elements

KW - Sm–Nd and Rb–Sr isotopic systematics

KW - bacterial communities

KW - iron-made artifacts

UR - https://www.mendeley.com/catalogue/88051e65-3f50-3922-b1b9-ac6d19f61ed8/

U2 - 10.1134/S0016702923090021

DO - 10.1134/S0016702923090021

M3 - Article

JO - Geochemistry International

JF - Geochemistry International

SN - 0016-7029

ER -