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 …
Constraints on the late Ediacaran sulfur cycle from carbonate associated sulfate
We report new sulfur isotope compositions (δ 34 S) in carbonate associated sulfate (CAS)
and pyrite from the lower Nama Group, Namibia (∼ 550 to< 547 Ma), and use these data to …
and pyrite from the lower Nama Group, Namibia (∼ 550 to< 547 Ma), and use these data to …
Insight into the genesis of the Zhaosu Carboniferous Mn carbonate deposit (NW China): Constraints from petrography, geochemistry, and C–Mo isotopes
ZG Dong, ZD Peng, CL Wang, BL Zhang, LC Zhang… - Mineralium …, 2022 - Springer
The genesis (primary versus secondary) of Mn carbonate-rich sediments, which consist of
sub-economic rocks and ore deposits, remains hotly debated. Here, we investigated the …
sub-economic rocks and ore deposits, remains hotly debated. Here, we investigated the …
A transient oxygen increase in the Mesoproterozoic ocean at∼ 1.44 Ga: Geochemical evidence from the Tieling Formation, North China Platform
Y Yu, Y Chen, D Li, J Su - Precambrian Research, 2022 - Elsevier
Oxygen availability is crucial for the evolution of eukaryotes in geological history, yet
detailed Mesoproterozoic oceanic-atmospheric redox conditions remain enigmatic. In …
detailed Mesoproterozoic oceanic-atmospheric redox conditions remain enigmatic. In …
Effects of seasonal anoxia on the microbial community structure in demosponges in a marine lake in Lough Hyne, Ireland
Climate change is expanding marine oxygen minimum zones (OMZs), while anthropogenic
nutrient input depletes oxygen concentrations locally. The effects of deoxygenation on …
nutrient input depletes oxygen concentrations locally. The effects of deoxygenation on …
Using SIMS to decode noisy stratigraphic δ13C variations in Ediacaran carbonates
Carbonate carbon isotope (δ 13 C carb) chemostratigraphy is a valuable tool in
Precambrian stratigraphic correlation. The effectiveness of this tool rests on the assumption …
Precambrian stratigraphic correlation. The effectiveness of this tool rests on the assumption …
Transient shallow-ocean oxidation associated with the late Ediacaran Nama skeletal fauna: evidence from iodine contents of the Lower Nama Group, southern …
The terminal Ediacaran interval from~ 550 Ma to 541 Ma witnessed the first appearance of
skeletal metazoans and complex ecosystems in Earth history. This biotic innovation event is …
skeletal metazoans and complex ecosystems in Earth history. This biotic innovation event is …
[HTML][HTML] Initial cyclostratigraphy of the middle Nama Group (Schwarzrand Subgroup) in southern Namibia
Abstract The Ediacaran Period includes critical evolutionary trends of early complex life as
well as climatic variations associated with ocean oxygenation, glaciations, and carbon …
well as climatic variations associated with ocean oxygenation, glaciations, and carbon …
Calcium isotopes as a record of the marine calcium cycle versus carbonate diagenesis during the late Ediacaran
Calcium isotope ratios in ancient carbonate rocks can provide insight into the global marine
calcium cycle as well as local conditions during carbonate mineral precipitation and …
calcium cycle as well as local conditions during carbonate mineral precipitation and …
[HTML][HTML] A shift in redox conditions near the Ediacaran/Cambrian transition and its possible influence on early animal evolution, Corumbá Group, Brazil
Abstract The Ediacaran–Cambrian transition witnessed some of the most important
biological, tectonic, climatic and geochemical changes in Earth's history. Of utmost …
biological, tectonic, climatic and geochemical changes in Earth's history. Of utmost …