Gas chromatography–isotope ratio mass spectrometry (GC-IRMS) has made it possible to
analyze natural stable isotope ratios (eg, 13C/12C, 15N/14N, 2H/1H) of individual organic …

Stable isotope ratios of sulfur (δ34S) and oxygen (δ18O) in marine sulfate respond to
changes in fluxes and processes in the global sulfur cycle. The two isotope systems respond …

The nine editions of Stable Isotope Geochemistry have appeared over a time span of nearly
50 years. The first edition (1973) appeared as a slim book of 135 pages. Due to the rapid …

Natural abundance nitrogen and oxygen isotopes of nitrate (δ15NNO3 and δ18ONO3)
provide an important tool for evaluating sources and transformations of natural and …

Microbial mediation is the only demonstrated mechanism to precipitate dolomite under Earth
surface conditions. A link between microbial activity and dolomite formation in the sabkha of …

Sulfur isotope fractionation during dissimilatory sulfate reduction has been conceptually
described by the widely accepted Rees model as related to the stepwise reduction of sulfate …

Sources of methane to sedimentary environments are commonly identified and quantified
using the stable isotopic compositions of methane. The methane “clumped-isotope …

The late Miocene evolution of the Mediterranean Basin is characterized by major changes in
connectivity, climate and tectonic activity resulting in unprecedented environmental and …

The role of sulfur cycling in arsenic behavior under reducing conditions is not well-
understood in previous investigations. This study provides observations of sulfur and oxygen …

An active microbial assemblage cycles sulfur in a sulfate-rich, ancient marine brine beneath
Taylor Glacier, an outlet glacier of the East Antarctic Ice Sheet, with Fe (III) serving as the …