[HTML][HTML] Environmental controls on very high δ238U values in reducing sediments: Implications for Neoproterozoic seawater records
Uranium isotopes (δ 238 U) are a widely applied tool for tracing global changes in oceanic
anoxia. Interpretation of seawater values and trends, often reconstructed from carbonates …
anoxia. Interpretation of seawater values and trends, often reconstructed from carbonates …
[HTML][HTML] Sedimentary cycling of zinc and nickel and their isotopes on an upwelling margin: Implications for oceanic budgets and paleoenvironment proxies
Zinc and Ni are essential micronutrients whose stable isotope systematics in marine
sediments represent promising, but still developing, tracers of past ocean chemistry and …
sediments represent promising, but still developing, tracers of past ocean chemistry and …
Seawater‐fluid composition records from molybdenum isotopes of sequentially extracted phases of seep carbonate rocks
Z Jia, Y Hu, G Bayon, J Peckmann… - Geochemistry …, 2023 - Wiley Online Library
Authigenic molybdenum (Moauth) in marine sediments holds great potential to archive the
Mo isotopic composition of seawater and biogeochemical processes. However, the factors …
Mo isotopic composition of seawater and biogeochemical processes. However, the factors …
Unveiling a new oceanic anoxic event at the Norian/Rhaetian boundary (Late Triassic)
The latest Triassic was characterised by protracted biotic extinctions concluding in the End-
Triassic Extinction (~ 200 Ma) and a global carbon cycle perturbation. The onset of declining …
Triassic Extinction (~ 200 Ma) and a global carbon cycle perturbation. The onset of declining …
Uranium and molybdenum isotope evidence for globally extensive marine euxinia on continental margins and in epicontinental seas during the Devonian …
Abstract The end-Devonian Hangenberg Crisis was one of the biggest Phanerozoic mass
extinctions. However, the mechanism (s) that triggered this event is still debated. In this …
extinctions. However, the mechanism (s) that triggered this event is still debated. In this …
Sedimentary molybdenum and uranium cycling under seasonally contrasting redox conditions on the Namibian Shelf
M Kossack, F Scholz, CH Anderson, P Vosteen… - … et Cosmochimica Acta, 2023 - Elsevier
Sedimentary molybdenum (Mo) and uranium (U) enrichments have been widely used as a
proxy for redox conditions in oxygen-depleted marine paleo-environments. However, in a …
proxy for redox conditions in oxygen-depleted marine paleo-environments. However, in a …
Global ocean redox changes before and during the Toarcian Oceanic Anoxic Event
Mesozoic oceanic anoxic events are recognized as widespread deposits of marine organic-
rich mudrocks temporally associated with mass extinctions and large igneous province …
rich mudrocks temporally associated with mass extinctions and large igneous province …
Variable local basin hydrography and productivity control the uranium isotope paleoredox proxy in anoxic black shales
KV Lau, LG Hancock, S Severmann, A Kuzminov… - … et Cosmochimica Acta, 2022 - Elsevier
Geochemical proxies—such as the isotopic compositions and abundances of redox-
sensitive metals, organic biomarkers, and sedimentological indicators—can be used …
sensitive metals, organic biomarkers, and sedimentological indicators—can be used …
Uranium isotope reconstruction of ocean deoxygenation during OAE 2 hampered by uncertainties in fractionation factors and local U-cycling
A δ 238 U record of changing ocean anoxia during OAE 2 is reconstructed using seawater
derived U in pelagic marine sediments in the Portland# 1 core in the south-central region of …
derived U in pelagic marine sediments in the Portland# 1 core in the south-central region of …
A benthic source of isotopically heavy Ni from continental margins and implications for global ocean Ni isotope mass balance
Nickel (Ni) is a bio-essential element for phytoplankton in the modern oceans, and yet, the
global ocean mass balance of Ni has puzzled scientists for decades. Many estimates of total …
global ocean mass balance of Ni has puzzled scientists for decades. Many estimates of total …