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ABSTRACT Intrinsic oxygen fugacity measurements on minerals from mafic rocks that cool at pressures greater than one atmosphere indicate that the Earth's interior is in a more reduced
state than are the erupting tholeiitic magmas. This review suggests that specific oxidation–reduction equilibria within magmas and between magma and vapour can account for the characteristic
oxygen fugacities of most lavas. A model is presented to illustrate how an initially highly reduced mafic magma may oxidize by degassing of C-species in the conditions of the shallow crust.
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references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Geological Sciences, University of Washington, Seattle, Washington, 98195, USA E. A. Mathez Authors * E. A. Mathez View
author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Mathez, E. Influence of
degassing on oxidation states of basaltic magmas. _Nature_ 310, 371–375 (1984). https://doi.org/10.1038/310371a0 Download citation * Issue Date: 02 August 1984 * DOI:
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