[HTML][HTML] Sedimentary Ce anomalies: Secular change and implications for paleoenvironmental evolution
K Zhang, GA Shields - Earth-Science Reviews, 2022 - Elsevier
Although Ce anomalies are commonly used to reconstruct past seawater redox conditions,
published interpretations are based on various proxy materials and analytical approaches …
published interpretations are based on various proxy materials and analytical approaches …
Extreme variability in atmospheric oxygen levels in the late Precambrian
Mapping the history of atmospheric O2 during the late Precambrian is vital for evaluating
potential links to animal evolution. Ancient O2 levels are often inferred from geochemical …
potential links to animal evolution. Ancient O2 levels are often inferred from geochemical …
A pulse of oxygen increase in the early Mesoproterozoic ocean at ca. 1.57–1.56 Ga
The relationship between oxygen and evolution of early eukaryotes including algae and
primitive animals in geological history has been debated, partly due to the varying estimates …
primitive animals in geological history has been debated, partly due to the varying estimates …
Reconstructing Neoproterozoic seawater chemistry from early diagenetic dolomite
The pairing of calcium and magnesium isotopes (δ 44/40 Ca, δ 26 Mg) has recently
emerged as a useful tracer to understand the environmental information preserved in …
emerged as a useful tracer to understand the environmental information preserved in …
Mesoproterozoic oxygenation event: From shallow marine to atmosphere
Oxygen availability is crucial for the evolution of eukaryotes in geological history, but the
redox conditions of the mid-Proterozoic atmospheric-oceanic system remain vigorously …
redox conditions of the mid-Proterozoic atmospheric-oceanic system remain vigorously …
The uranium isotopic record of shales and carbonates through geologic time
In the modern ocean, U reduction and incorporation into anoxic sediments imparts a large
isotopic fractionation of approximately+ 0.6‰ that shifts the seawater δ 238 U value (238 …
isotopic fractionation of approximately+ 0.6‰ that shifts the seawater δ 238 U value (238 …
A Bayesian approach to inferring depositional ages applied to a late Tonian reference section in Svalbard
GP Halverson, C Shen, JHFL Davies… - Frontiers in Earth Science, 2022 - frontiersin.org
Increasing application of high precision uranium-lead (U-Pb) and rhenium-osmium (Re-Os)
geochronology to the ancient geological record has resulted in massive improvement in age …
geochronology to the ancient geological record has resulted in massive improvement in age …
Mesoproterozoic molar tooth structure related to increased marine oxygenation
Marine carbonate fabrics are intrinsically related to ocean chemistry, physical processes and
biological activity. Molar tooth structure (MTS), a globally distributed structure in Proterozoic …
biological activity. Molar tooth structure (MTS), a globally distributed structure in Proterozoic …
Oxygen increase and the pacing of early animal evolution
K Kaiho, A Shizuya, M Kikuchi, T Komiya… - Global and Planetary …, 2024 - Elsevier
While it is widely accepted that early animals originated and primarily evolved during the
Neoproterozoic to Cambrian period, there remains ongoing debate over how fluctuations in …
Neoproterozoic to Cambrian period, there remains ongoing debate over how fluctuations in …
Iodine incorporation into dolomite: Experimental constraints and implications for the iodine redox proxy and Proterozoic Ocean
Iodine concentrations in sedimentary carbonate minerals are used as a proxy to reconstruct
the redox landscape in shallow oceans throughout Earth history. The proxy [I/(Ca+ Mg)] …
the redox landscape in shallow oceans throughout Earth history. The proxy [I/(Ca+ Mg)] …