Isotopic Compositions (Li?B?Si?O?Mg?Sr?Nd?Hf?Pb) and Fe ²⁺ /?Fe Ratios of Three Synthetic Andesite Glass Reference Materials (ARM?1, ARM?2, ARM?3)

Iron Isotopic Compositions of Geological Reference Materials and Chondrites

High-precision iron isotopic compositions for Fe-bearing geological reference materials and chondrites with a wide range of matrices (e.g., silicates, oxides, organic-bearing materials) are reported. This comprehensive data set should serve as a reference for iron isotopic studies across a range of geological and biological disciplines for both quality assurance and inter-laboratory calibration...

Inferences from the vertical distribution of Fe isotopic compositions on pedogenetic processes in soils

Isotopic Constraints on Biogeochemical Cycling of Fe

INTRODUCTION Cycling of redox-sensitive elements such as Fe is affected by not only ambient Eh-pH conditions, but also by a signifi cant biomass that may derive energy through changes in redox state (e. The evidence now seems overwhelming that biological processing of redox-sensitive metals is likely to be the rule in surface-and near-surface environments, rather than the exception. The Fe redo...

Fe Isotopic Composition of Martian Meteorites

Introduction The scientific community has actively debated for quite some time the possibility that conditions were once favorable for life to originate and evolve on Mars. However, as we know it, for life to survive, the presence of liquid water is essential. The present day climate on Mars is inhospitable for sustaining any life form. However, recent data from twin rovers, Spirit and Opportun...

[Fe/O] and [Fe/Mg] ratios and the history of star formation in the solar neighborhood

The accurate O, Mg and Fe abundances derived in previous papers of this series from a homogenous reanalysis of high quality data for a large sample of stars are combined with stellar kinematics in order to discuss the history of star formation in the solar neighborhood. We found that the Fe/O and Fe/Mg abundance ratios are roughly constant in the (inner) halo and the thick disk; this means that...