Electron flux is a key determinant of uranium isotope fractionation during bacterial reduction
Uranium isotopic signatures in the rock record are utilized as a proxy for past redox
conditions on Earth. However, these signatures display significant variability that …
conditions on Earth. However, these signatures display significant variability that …
Cambrian radiation speciation events driven by sea level and redoxcline changes on the Siberian Craton
The evolutionary processes of speciation during the Cambrian radiation and their potential
extrinsic drivers, such as episodic oceanic oxygenation events, remain unconfirmed. High …
extrinsic drivers, such as episodic oceanic oxygenation events, remain unconfirmed. High …
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 …
Precipitation of CaCO3 in natural and man-made aquatic environments-Mechanisms, analogues, and proxies
Calcium carbonate precipitates occur in diverse and widespread aquatic environments, both
from marine to terrestrial natural surroundings and from anthropogenic to engineered …
from marine to terrestrial natural surroundings and from anthropogenic to engineered …
Inverse Mo versus U isotope correlation of Early Cambrian highly metalliferous black shales in South China indicates synsedimentary metal enrichment from a near …
The basal unit of the Early Cambrian black shale sequence of South China hosts sulfide-rich
polymetallic units, non-sulfidic vanadium-rich black shales, sapropelic alginite (combustible …
polymetallic units, non-sulfidic vanadium-rich black shales, sapropelic alginite (combustible …
[HTML][HTML] Persistent late Tonian shallow marine anoxia and euxinia
The increase in the complexity of eukaryotic life during the Tonian Period (ca. 1000 to 720
Ma) is commonly associated with the oxygenation of the Earth's ocean–atmosphere system …
Ma) is commonly associated with the oxygenation of the Earth's ocean–atmosphere system …
[HTML][HTML] Regional conditions cause contrasting behaviour in U-isotope fractionation in black shales: Constraints for global ocean palaeo-redox reconstructions
The U-isotope system is a well-established palaeo-redox proxy that potentially constrains
the global extent of marine anoxia during average as well as extreme redox events …
the global extent of marine anoxia during average as well as extreme redox events …
[HTML][HTML] Source versus weathering processes as controls on the Mackenzie river uranium isotope signature
Uranium (U) isotope signatures (δ 238 U) recorded in sedimentary archives provide insight
into the paleo redox state of the ocean. But the robust interpretation of these sedimentary U …
into the paleo redox state of the ocean. But the robust interpretation of these sedimentary U …
Comparing thallium isotopes to paleosalinity and Mo-U isotope paleoredox proxies: A case study of the Upper Devonian Kettle Point Formation, Ontario
NC Bell - 2023 - uwspace.uwaterloo.ca
Black shale formations are utilised to reconstruct ancient global ocean redox conditions by
analyzing and inferring their geochemical and isotopic compositions. However, the accuracy …
analyzing and inferring their geochemical and isotopic compositions. However, the accuracy …