Geophysical Monograph Series, Page 1-26., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst +8 more
wiley +9 more sources
Chromium isotope constraints on deep mantle oxidation from the Early Archean to Paleoproterozoic [PDF]
Nature CommunicationsThe evolution of Earth’s mantle redox state is central to understanding the rise of atmospheric oxygen and the development of a habitable planet. However, whether the deep mantle has become increasingly oxidized over geological time and its underlying ...
Li-Juan Xu +10 more
doaj +2 more sources
Archean phosphorus liberation induced by iron redox geochemistry [PDF]
Nature Communications, 2018 Phosphorus is presumed to have been a limiting nutrient in the Archean ocean due to binding to iron oxides. Here, the authors show the heating of iron with phosphate results in the reduction of phosphate to the ion phosphite, which is solubilized and ...
Barry Herschy +8 more
doaj +2 more sources
Shale Heavy Metal Isotope Records of Low Environmental O2 Between Two Archean Oxidation Events
Frontiers in Earth Science, 2022 Evidence of molecular oxygen (O2) accumulation at Earth’s surface during the Archean (4.0–2.5 billion years ago, or Ga) seems to increase in its abundance and compelling nature toward the end of the eon, during the runup to the Great Oxidation Event. Yet,
Chadlin M. Ostrander +9 more
doaj +1 more source
Archean geodynamics: Ephemeral supercontinents or long-lived supercratons [PDF]
, 2021 Many Archean cratons exhibit Paleoproterozoic rifted margins, implying they were pieces of some ancestral landmass(es). The idea that such an ancient continental assembly represents an Archean supercontinent has been proposed but remains to be justified.
Sergei A. Pisarevsky (2845466) +5 more
core +2 more sources
Novel Microbial Groups Drive Productivity in an Archean Iron Formation
Frontiers in Microbiology, 2021 Deep subsurface environments are decoupled from Earth’s surface processes yet diverse, active, and abundant microbial communities thrive in these isolated environments.
Cody S. Sheik +13 more
doaj +1 more source
Lethaia, EarlyView., 2021 Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido +4 more
wiley +1 more source
Archean-Paleozoic zircons in Zealandia
, 2022 Databases of U-Pb detrital zircon ages from Ordovician sandstones and quartzites in Nelson, Fiordland and Stewart Island, South Island New Zealand with have exceptionally high proportions of ages, 2000-3500 Ma, Archean-early Paleoproterozoic.
christopher adams (12236048) +1 more
core +1 more source
Geophysical Monograph Series, Page 137-165., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov +3 more
wiley +3 more sources
Modeling the signature of sulfur mass-independent fractionation produced in the Archean atmosphere [PDF]
, 2014 Minor sulfur isotope anomalies indicate the absence of O2 from the Archean atmosphere. A rich dataset showing large variations in magnitude and sign of Δ33S and Δ36S, preserved in both sulfates and sulfides, suggests that further constraints on Archean ...
Claire, Mark +6 more
core +1 more source