Atmospheric oxygenation caused by a change in volcanic degassing pressure

  title={Atmospheric oxygenation caused by a change in volcanic degassing pressure},
  author={Fabrice Gaillard and Bruno Scaillet and Nicholas T. Arndt},
The Precambrian history of our planet is marked by two major events: a pulse of continental crust formation at the end of the Archaean eon and a weak oxygenation of the atmosphere (the Great Oxidation Event) that followed, at 2.45 billion years ago. This oxygenation has been linked to the emergence of oxygenic cyanobacteria and to changes in the compositions of volcanic gases, but not to the composition of erupting lavas—geochemical constraints indicate that the oxidation state of basalts and… 
Earth science: Sea change for the rise of oxygen
It is proposed that as continents emerged and volcanoes became increasingly subaerial rather than submarine, magmatic volatiles were degassed at lower pressures, leading to a progressive oxidation of the gases released, which fed marine sulphate reduction and the eventual oxygenation of Earth's atmosphere.
Did mantle plume magmatism help trigger the Great Oxidation Event
The Great Oxidation Event (GOE) represents the first sustained appearance of free oxygen in Earth's atmosphere. This fundamental event in Earth's history has been dated to approximately 2450 million
The impact of degassing on the oxidation state of basaltic magmas: A case study of Kīlauea volcano
Volcanic emissions link the oxidation state of the Earth's mantle to the composition of the atmosphere. Whether the oxidation state of an ascending magma follows a redox buffer – hence preserving
The Great Oxygenation Event
  • R. Ligrone
  • Chemistry
    Biological Innovations that Built the World
  • 2019
Old sedimentary rocks record the history of oxygen in the form of redox-sensitive chemical species such as iron, uranium or cerium ions, and mass-independent fractionation of sulphur isotopes. These
Geochemical evidence for high volatile fluxes from the mantle at the end of the Archaean
Direct geochemical constraints on the flux of volatiles from the mantle are presented to lend credence to models advocating a magmatic origin for drastic environmental changes during the Neoarchaean era, such as the Great Oxidation Event.
Methanogenesis sustained by sulfide weathering during the Great Oxidation Event
The Great Oxidation Event following the end of the Archaean eon (~2.4 Ga) was a profound turning point in the history of Earth and life, but the relative importance of various contributing factors
A theoretical framework for volcanic degassing chemistry in a comparative planetology perspective and implications for planetary atmospheres
Abstract Magmatic degassing is ubiquitous and enduring, yet its impact on both planetary surficial chemistry and how it may have varied among planetary systems remains imprecise. A large number of
Mantle cooling causes more reducing volcanic gases and gradual reduction of the atmosphere
doi: 10.7185/geochemlet.2009 The early atmosphere contained negligible O2 until the Great Oxidation Event (GOE) around 2.4 Ga, but evidence suggests that production of photosynthetic O2 began
Redox variations in Mauna Kea lavas, the oxygen fugacity of the Hawaiian plume, and the role of volcanic gases in Earth’s oxygenation
Volcanic degassing at Mauna Kea volcanoes decreases the oxidation state of both Fe and S in the magmas, consistent with recent results from Kilauea volcano, and shows that low-pressure degassing resulted in reduction of the fO2 of MaunaKea magmas by more than an order of magnitude.
Volcanically modulated pyrite burial and ocean–atmosphere oxidation
Abstract It is widely assumed that changes in the rate of biological O2 supply to the atmosphere played little, if any, role in driving the Great Oxidation Event (GOE) because extensive biological O2


Increased subaerial volcanism and the rise of atmospheric oxygen 2.5 billion years ago
Observations are consistent with the corollary that subaerial volcanism only became widespread after a major tectonic episode of continental stabilization at the beginning of the Proterozoic, and propose that the rise of atmospheric oxygen occurred because the predominant sink for oxygen in the Archaean era—enhanced submarine volcanism—was abruptly and permanently diminished.
Redox evolution of a degassing magma rising to the surface
A coupled chemical–physical model of conduit flow is used to show that the redox state evolution of an ascending magma, and thus of its coexisting gas phase, is strongly dependent on both the composition and the amount of gas in the reservoir.
The sulfur content of volcanic gases on Mars
Both high sulfur contents of the martian regolith and lack of detection of extensive carbonate deposits suggest that the latest geological events that shaped the landscapes of Mars were dominated by
Biogeochemical modelling of the rise in atmospheric oxygen
Understanding the evolution of atmospheric molecular oxygen levels is a fundamental unsolved problem in Earth’s history. We develop a quantitative biogeochemical model that simulates the
Seafloor eruptions and evolution of hydrothermal fluid chemistry
  • D. Butterfield, I. Jonasson, +7 authors J. Delaney
  • Geology, Biology
    Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 1997
Chemical data for CoAxial vents presented here are consistent with this evolution of phase separation and enhanced volatile fluxes associated with volcanic eruptions, with vapour–dominated fluids predominating in the initial post–eruption period, followed in time by brine-dominated fluids, consistent with temporary storage of brine below the seafloor.
Isotopic evidence for Mesoarchaean anoxia and changing atmospheric sulphur chemistry
The findings point to the persistence of an anoxic early atmosphere, and identify variability within the isotope record that suggests changes in pre-2.45-Gyr-ago atmospheric pathways for non-mass-dependent chemistry and in the ultraviolet transparency of an evolving early atmosphere.
Late Archean euxinic conditions before the rise of atmospheric oxygen
Life on Earth is thought to have coevolved with the chemistry of the oceans and atmosphere, and the shift from an anoxic to an oxic world across the Archean-Proterozoic boundary represents a
The loss of mass‐independent fractionation in sulfur due to a Palaeoproterozoic collapse of atmospheric methane
We use a 1-D numerical model to study the atmospheric photochemistry of oxygen, methane, and sulfur after the advent of oxygenic photosynthesis. We assume that mass-independent fractionation (MIF) of
Formation of supercontinents linked to increases in atmospheric oxygen
Atmospheric oxygen concentrations in the Earth’s atmosphere rose from negligible levels in the Archaean Era to about 21% in the present day. This increase is thought to have occurred in six steps,
Sulfur Degassing From Volcanoes: Source Conditions, Surveillance, Plume Chemistry and Earth System Impacts
Despite its relatively minor abundance in magmas (compared with H2O and CO2), sulfur degassing from volcanoes is of tremendous significance. It can exert substantial influence on magmatic evolution