Global marine redox evolution from the late Neoproterozoic to the early Paleozoic constrained by the integration of Mo and U isotope records
The emergence and diversification of early animals is commonly thought to have coincided
with atmosphere and ocean oxygenation across the terminal Neoproterozoic and early …
with atmosphere and ocean oxygenation across the terminal Neoproterozoic and early …
Uranium isotopes in marine carbonates as a global ocean paleoredox proxy: a critical review
The protracted oxygenation of the ocean-atmosphere system is one of the most fundamental
changes to the Earth system through its history. The uranium isotopic composition (238 …
changes to the Earth system through its history. The uranium isotopic composition (238 …
Extensive marine anoxia during the terminal Ediacaran Period
The terminal Ediacaran Period witnessed the decline of the Ediacara biota (which may have
included many stem-group animals). To test whether oceanic anoxia might have played a …
included many stem-group animals). To test whether oceanic anoxia might have played a …
Global marine redox changes drove the rise and fall of the Ediacara biota
The role of O2 in the evolution of early animals, as represented by some members of the
Ediacara biota, has been heavily debated because current geochemical evidence paints a …
Ediacara biota, has been heavily debated because current geochemical evidence paints a …
Marine redox fluctuation as a potential trigger for the Cambrian explosion
The diversification of metazoans during the latest Neoproterozoic and early Cambrian has
been attributed to, among other factors, a progressive rise in surface oxygen levels …
been attributed to, among other factors, a progressive rise in surface oxygen levels …
Congruent Permian-Triassic δ238U records at Panthalassic and Tethyan sites: Confirmation of global-oceanic anoxia and validation of the U-isotope paleoredox …
Oceanic anoxia has been proposed as a proximate cause of the end-Permian mass
extinction (EPME), but evaluation of this hypothesis is hampered by limited detailed …
extinction (EPME), but evaluation of this hypothesis is hampered by limited detailed …
Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2
Oceanic Anoxic Event 2 (OAE 2), occurring∼ 94 million years ago, was one of the most
extreme carbon cycle and climatic perturbations of the Phanerozoic Eon. It was typified by a …
extreme carbon cycle and climatic perturbations of the Phanerozoic Eon. It was typified by a …
The effects of diagenesis on geochemical paleoredox proxies in sedimentary carbonates
Metal and metal isotope records in carbonates have the potential to provide novel insights
into ancient ocean–atmosphere redox conditions, paleoenvironmental conditions, and …
into ancient ocean–atmosphere redox conditions, paleoenvironmental conditions, and …
Uranium isotope evidence for an expansion of anoxia in terminal Ediacaran oceans
Anoxic and iron-rich oceanic conditions prevailed throughout most of the Archean and
Proterozoic (4000 to c. 540 million years ago, Ma), but the oceans are hypothesised to have …
Proterozoic (4000 to c. 540 million years ago, Ma), but the oceans are hypothesised to have …
Diagenetic effects on uranium isotope fractionation in carbonate sediments from the Bahamas
Uranium isotope variations (δ 238 U) recorded in sedimentary carbonate rocks are a
promising new proxy for the extent of oceanic anoxia through geological time. However, the …
promising new proxy for the extent of oceanic anoxia through geological time. However, the …