ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Mössbauer spectra of volcanic glasses from the 1875 Askja eruption reveals that the dacitemagma chamber was stratified in oxygen fugacity. The eruption was triggered by basaltic magma which was intruded into the base of the chamber. The observed oxidation state falls within the range of oxygen fugacities of H2O/CO2 mixtures at the liquidus temperature of the magma. It is concluded that oxygen fugacity of the chamber was effected by volcanic gases. The source of the gases was the degassing of superheated dacite at the dacite/basalt interface along the bottom of the chamber.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02397494