FRONTIERS IN THE ANALYSIS AND INTERPRETATION OF ZONED GARNET CRYSTALS: FE-ISOTOPES AS A RECORDER OF REDOX FLUID PROCESSES

2019 ◽  
Author(s):  
Ethan F. Baxter ◽  
◽  
Anna R. Gerrits ◽  
Edward Inglis ◽  
Besim Dragovic ◽  
...  
Keyword(s):  
Fe Isotopes

New potential pyrrhotite and pentlandite reference materials for sulfur and iron isotope microanalysis

2021 ◽  
Author(s):  
Lei Chen ◽  
Yu Liu ◽  
Yang Li ◽  
Qiuli Li ◽  
Xian-Hua Li
Keyword(s):  
Reference Materials ◽  
Sulfide Minerals ◽  
Ore Deposits ◽  
Iron Isotope ◽  
S Isotopes ◽  
Fe Isotopes

Pyrrhotite and pentlandite are the most common Fe sulfide minerals in magmatic ore deposits and meteorites. Multiple S isotopes pairing with Fe isotopes of bulk Fe sulfides have proven to...

scholarly journals More than redox, biological organic ligands control iron isotope fractionation in the riparian wetland

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Elaheh Lotfi-Kalahroodi ◽  
Anne-Catherine Pierson-Wickmann ◽  
Olivier Rouxel ◽  
Rémi Marsac ◽  
Martine Bouhnik-Le Coz ◽  
...  
Keyword(s):  
Redox Reactions ◽  
Isotope Fractionation ◽  
Isotopic Fractionation ◽  
Isotopic Signature ◽  
Organic Ligands ◽  
Riparian Wetland ◽  
Fe Isotopes ◽  
Preferential Binding ◽  
Isotope Systematics

AbstractAlthough redox reactions are recognized to fractionate iron (Fe) isotopes, the dominant mechanisms controlling the Fe isotope fractionation and notably the role of organic matter (OM) are still debated. Here, we demonstrate how binding to organic ligands governs Fe isotope fractionation beyond that arising from redox reactions. The reductive biodissolution of soil Fe(III) enriched the solution in light Fe isotopes, whereas, with the extended reduction, the preferential binding of heavy Fe isotopes to large biological organic ligands enriched the solution in heavy Fe isotopes. Under oxic conditions, the aggregation/sedimentation of Fe(III) nano-oxides with OM resulted in an initial enrichment of the solution in light Fe isotopes. However, heavy Fe isotopes progressively dominate the solution composition in response to their binding with large biologically-derived organic ligands. Confronted with field data, these results demonstrate that Fe isotope systematics in wetlands are controlled by the OM flux, masking Fe isotope fractionation arising from redox reactions. This work sheds light on an overseen aspect of Fe isotopic fractionation and calls for a reevaluation of the parameters controlling the Fe isotopes fractionation to clarify the interpretation of the Fe isotopic signature.

A preliminary mixing model for Fe isotopes in soils

2005 ◽  
Vol 222 (1-2) ◽  
pp. 23-34 ◽  
Author(s):  
Simon Emmanuel ◽  
Yigal Erel ◽  
Alan Matthews ◽  
Nadya Teutsch
Keyword(s):  
Mixing Model ◽  
Fe Isotopes

Projected spectra of Fe isotopes in the modified deformed BCS approach

1989 ◽  
Vol 101 (3) ◽  
pp. 507-513
Author(s):  
R. Raj ◽  
M. L. Rustgi
Keyword(s):  
Fe Isotopes

COMPOSITION OF Fe-ISOTOPES IN COSMIC RAYS

1978 ◽  
pp. 1059-1068 ◽  
Author(s):  
G. Siegmon ◽  
K.-P. Bartholomä ◽  
W. Enge
Keyword(s):  
Cosmic Rays ◽  
Fe Isotopes

Fe isotopes

2005 ◽  
pp. 1-23
Author(s):  
S. I. Sukhoruchkin ◽  
Z. N. Soroko ◽  
V. V. Deriglazov
Keyword(s):  
Fe Isotopes

THE APPLICATION OF STABLE Fe ISOTOPES TO MAGMATIC SULFIDE SYSTEMS: CONSTRAINTS ON THE Fe ISOTOPE COMPOSITION OF MAGMATIC PYRRHOTITE

2018 ◽  
Vol 113 (5) ◽  
pp. 1181-1192 ◽  
Author(s):  
Laura D. Bilenker ◽  
Dominique Weis ◽  
James S. Scoates ◽  
Eden Perry
Keyword(s):  
Isotope Composition ◽  
Fe Isotopes ◽  
Magmatic Sulfide
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