New Magmatic Oxybarometer Using Trace Elements in Zircon
The University of Western Australia · ARC Centre of Excellence for Core to Crust Fluid Systems
Abstract
Abstract We derive a novel method for determining the oxidation state of a magma as zircon crystallized, with a standard error of ±0·6 log unit ƒO2, using ratios of Ce, U, and Ti in zircon, without explicit determination of the ionic charge of any of them, and without independent determination of crystallization temperature or pressure or parental melt composition. It yields results in good agreement with oxybarometry on Fe–Ti oxide phenocrysts and hornblende phenocrysts quenched in eruptive I- and A-type dacites and rhyolites, but our zircon oxybarometer is also applicable to slowly cooled plutonic rocks and applicable to detrital and xenocrystic zircons. Zircon/melt partition coefficients of Ce and U vary…
Citation impact
- FWCI
- 33.47
- Percentile
- 100%
- References
- 178
Authors
3- RRRobert R. LoucksCorresponding
The University of Western Australia, ARC Centre of Excellence for Core to Crust Fluid Systems
- MLMarco L. Fiorentini
The University of Western Australia, ARC Centre of Excellence for Core to Crust Fluid Systems
- GJGonzalo J. Henríquez
The University of Western Australia, ARC Centre of Excellence for Core to Crust Fluid Systems
Topics & keywords
- Zircon
- Geology
- Phenocryst
- Felsic
- Geochemistry
- Titanite
- Mafic
- Hornblende