An oxygen buffer for some peraluminous granites and metamorphic rocks.
The mineral assemblage biotite-garnet-muscovite-magnetite-quartz and its sub-sets are common in many peraluminous granites, schists and gneisses. If the biotite and garnet are reasonably iron-rich, then the system is a useful buffer for fO2. Available thermochemical data indicate that, in T-fO2 space, the buffer curve is located between the hematite-magnetite curve and the quartz-magnetite-fayalite curve, in a region that previously had no buffer curve applicable to peraluminous rocks. -J.A.Z.
Citation Information
Publication Year | 1985 |
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Title | An oxygen buffer for some peraluminous granites and metamorphic rocks. |
Authors | E. Zen |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | American Mineralogist |
Index ID | 70013460 |
Record Source | USGS Publications Warehouse |