Iron isotope systematics
Iron Isotope Systematics | Reviews in Mineralogy and Geochemistry | GeoScienceWorld
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The Neoproterozoic oxygenation event: Environmental perturbations and biogeochemical cycling
The oxygen content of the Earth's surface environment is thought to have increased in two
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …
broad steps: the Great Oxygenation Event (GOE) around the Archean–Proterozoic boundary …
Fluctuations in Precambrian atmospheric oxygenation recorded by chromium isotopes
Geochemical data,,, suggest that oxygenation of the Earth's atmosphere occurred in two
broad steps. The first rise in atmospheric oxygen is thought to have occurred between∼ …
broad steps. The first rise in atmospheric oxygen is thought to have occurred between∼ …
Influence of sulfate reduction rates on the Phanerozoic sulfur isotope record
Phanerozoic levels of atmospheric oxygen relate to the burial histories of organic carbon
and pyrite sulfur. The sulfur cycle remains poorly constrained, however, leading to …
and pyrite sulfur. The sulfur cycle remains poorly constrained, however, leading to …
Animal evolution, bioturbation, and the sulfate concentration of the oceans
DE Canfield, J Farquhar - Proceedings of the National …, 2009 - National Acad Sciences
As recognized already by Charles Darwin, animals are geobiological agents. Darwin
observed that worms aerate and mix soils on a massive scale, aiding in the decomposition …
observed that worms aerate and mix soils on a massive scale, aiding in the decomposition …
Spatial variability in oceanic redox structure 1.8 billion years ago
The evolution of ocean chemistry during the Proterozoic eon (2.5–0.542 billion years ago) is
thought to have played a central role in both the timing and rate of eukaryote evolution,. The …
thought to have played a central role in both the timing and rate of eukaryote evolution,. The …
Multiple sulfur isotopes and the evolution of Earth's surface sulfur cycle
DT Johnston - Earth-Science Reviews, 2011 - Elsevier
The distribution of sulfur isotopes in geological materials reveals information about Earth
history and biogeochemical processes. Research during the last several decades has used …
history and biogeochemical processes. Research during the last several decades has used …
Oceanic euxinia in Earth history: causes and consequences
Euxinic ocean conditions accompanied significant events in Earth history, including several
Phanerozoic biotic crises. By critically examining modern and ancient euxinic environments …
Phanerozoic biotic crises. By critically examining modern and ancient euxinic environments …
Tectonics and surface effects of the supercontinent Columbia
JJW Rogers, M Santosh - Gondwana Research, 2009 - Elsevier
Assembly of the supercontinent Columbia at about 1.85–1.90 Ga coincided with several
events that affected the entire earth. The oldest worldwide network of orogenic belts formed …
events that affected the entire earth. The oldest worldwide network of orogenic belts formed …
Claypool continued: Extending the isotopic record of sedimentary sulfate
Abstract The Proterozoic Eon spans Earth's middle age during which many important
transitions occurred. These transitions include the oxygenation of the atmosphere …
transitions occurred. These transitions include the oxygenation of the atmosphere …