Abstract
The relatively large isotopic fractionations found for all stable isotope systems at low temperatures has attracted extensive interest in low-temperature environments, and stable Fe isotopes are no exception. The organization of this chapter starts with the continents, addressing weathering and soil-formation processes. We then move to terrestrial rivers and groundwater systems, followed by discussion of redox-stratified water bodies and their sediments, including lakes and the Black Sea. Next, we focus on modern marine sediments, which record extensive Fe biogeochemical cycling and authigenic mineral formation that is key to understanding the modern marine Fe budget.
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