Biological effects on uranium isotope fractionation (238U/235U) in primary biogenic carbonates
Sign Up to like & getrecommendations! Published in 2018 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2018.08.028
Abstract: Abstract Determining whether U isotopes are fractionated during incorporation into biogenic carbonates could help to refine the application of 238U/235U in CaCO3 as a robust paleoredox proxy. Recent laboratory experiments have demonstrated that heavy uranium… read more here.
Keywords: biogenic carbonates; fractionation; primary biogenic; 238u 235u ... See more keywords
Potassium phases and isotopic composition in modern marine biogenic carbonates
Sign Up to like & getrecommendations! Published in 2021 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2021.04.018
Abstract: Abstract Recent analytical advances enable stable potassium (K) isotopes to serve as a promising geochemical tracer of paleoceanography. Preserved calcified fossils in marine carbonate sediments have the potential to act as important archives of ancient… read more here.
Keywords: biogenic carbonates; 41k values; isotopic composition; marine ... See more keywords