Chromium Isotope Systematics in Modern and Ancient Microbialites

• Published in: Minerals
• Main Authors: Sylvie Bruggmann, Alexandra S. Rodler, Robert M. Klaebe, Steven Goderis, Robert Frei
• Format: Article in Journal/Newspaper
• Language: English
• Published: MDPI AG 2020
• Subjects: Cr isotopes; C isotopes; O isotopes; rare earth elements; Proterozoic; carbonates; Mineralogy; QE351-399.2; Andrée; Greenland; Andrée-Land
• Online Access: https://doi.org/10.3390/min10100928; https://doaj.org/article/e67c3d31d4654c6f9be26d4848f7679d

Changes in stable chromium isotopes (denoted as δ 53 Cr) in ancient carbonate sediments are increasingly used to reconstruct the oxygenation history in Earth’s atmosphere and oceans through time. As a significant proportion of marine carbonate older than the Cambrian is microbially-mediated, the uti...