Isotope Fractionation (Metal)
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ISOTOPE FRACTIONATION (METAL)
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as a result of analytical developments. As of this writing, fractionations have been reported for more than a dozen such elements (Figure 1). These investigations are heavily motivated by geobiological considerations. In particular, there is wide interest in the use of these new isotope systems as biosignatures and as proxies for the
Cross-references Acid Rock Drainage Anaerobic Transformation Processes, Microbiology Biofilms and Fossilization Black Shales Isotopes and Geobiology Microbial Degradation Pore Waters Pyrite Oxidation Pyritization Sediment Diagenesis – Biologically Controlled Shales Sulfate-Reducing Bacteria Sulfide Mineral Oxidation Sulfur Cycle
ISOTOPE FRACTIONATION (METAL) Ariel D. Anbar1, Silke Severmann2 1 Arizona State University, Tempe, AZ, USA 2 Rutgers University, New Brunswick, NJ, USA
Definition Variations in the abundances of the isotopes of metals, especially transition metals, arising from physical or chemical processes that discriminate among the isotopes of a given element. Overview Research into isotope fractionation of transition metals, alkaline earth metals, and metalloids is advancing rapidly
Isotope Fractionation (Metal), Figure 1 Observed range of isotopic variations in modern and ancient natural samples for a selection of metals and metalloids. All values are expressed in delta notation [parts per 1,000 (%) per atomic mass unit], normalized to average Bulk Silicate Earth (indicated by the gray vertical line). Blue diamonds indicate the average isotope compositio
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