Snowballs in Africa: sectioning a long-lived Neoproterozoic carbonate platform and its bathyal foreslope (NW Namibia)
Abstract Otavi Group is a 1.5–3.5-km-thick epicontinental marine carbonate succession of
Neoproterozoic age, exposed in an 800-km-long Ediacaran− Cambrian fold belt that rims …
Neoproterozoic age, exposed in an 800-km-long Ediacaran− Cambrian fold belt that rims …
Biogeochemical cycle of chromium isotopes at the modern Earth's surface and its applications as a paleo-environment proxy
Chromium (Cr) is a redox-sensitive metal element with two natural oxidation states,
commonly as the soluble Cr (VI) oxyanion (CrO 4 2− or HCrO 4−) and the insoluble Cr (III) …
commonly as the soluble Cr (VI) oxyanion (CrO 4 2− or HCrO 4−) and the insoluble Cr (III) …
Biological diversification linked to environmental stabilization following the Sturtian Snowball glaciation
The body fossil and biomarker records hint at an increase in biotic complexity between the
two Cryogenian Snowball Earth episodes (ca. 661 million to≤ 650 million years ago) …
two Cryogenian Snowball Earth episodes (ca. 661 million to≤ 650 million years ago) …
Oxygenation variations in the atmosphere and shallow seawaters of the Yangtze Platform during the Ediacaran Period: Clues from Cr-isotope and Ce-anomaly in …
Abstract The late Neoproterozoic Era witnessed a significant oxygenation in Earth's surface
in line with the naissance and diversity of early animals; however, detailed variations of the …
in line with the naissance and diversity of early animals; however, detailed variations of the …
Multiproxy geochemical and isotope stratigraphy records of a Neoproterozoic Oxygenation Event in the Ediacaran Sete Lagoas cap carbonate, Bambuí Group, Brazil
In order to investigate the geochemical responses of Earth's oceans and atmosphere after a
Snowball glaciation, we studied an Ediacaran cap carbonate profile pertaining to the base of …
Snowball glaciation, we studied an Ediacaran cap carbonate profile pertaining to the base of …
[HTML][HTML] Sabkha and salina dolomite preserves the biogeochemical conditions of its depositional paleoenvironment
Precipitation of Mg-carbonate minerals, ranging from Mg-calcite to Ca-rich dolomite, is
typically associated with microbial activity, and commonly takes place in saline …
typically associated with microbial activity, and commonly takes place in saline …
Geochronological constraints on Cryogenian ice ages: Zircon UPb ages from a shelf section in South China
Abstract Radiometric dating of Neoproterozoic Cryogenian glacial deposits is critical for
constraining the duration of the Sturtian and Marinoan ice ages and understanding the …
constraining the duration of the Sturtian and Marinoan ice ages and understanding the …
Chromium isotope cycling in the water column and sediments of the Peruvian continental margin
S Bruggmann, F Scholz, RM Klaebe… - … et Cosmochimica Acta, 2019 - Elsevier
Chromium (Cr) isotope fractionation is sensitive to redox changes and the Cr isotopic
composition (δ 53 Cr) of sedimentary rocks has been used to reconstruct marine redox …
composition (δ 53 Cr) of sedimentary rocks has been used to reconstruct marine redox …
The role of pH on Cr (VI) partitioning and isotopic fractionation during its incorporation in calcite
The Cr (VI) incorporation and chromium stable isotope composition in calcite has been
studied in experiments performed in the pH range between 8.0 and 10.6 at constant …
studied in experiments performed in the pH range between 8.0 and 10.6 at constant …
Redox heterogeneity of the Ediacaran ocean constrained by chromium isotopes
Ocean oxygenation during the Ediacaran Period (635–541 Ma) is thought to be a potential
stimulus for the emergence and diversification of early animals. However, the atmospheric …
stimulus for the emergence and diversification of early animals. However, the atmospheric …