On the breakdown of zircon upon "dry" thermal annealing

Autor(en)

Tamas Vaczi, Eugen Libowitzky, Mathias Mehofer, Lutz Nasdala, Tobias Häger, Richard Wirth

Abstrakt

Zircon samples without and with secondary chem. alteration from diverse sources were subjected to heat treatment at 1400 C for 96 h. Resulting new phases and textures suggest that decompn. of zircon into component oxides occurred in all expts. to various degrees. The crucible material was found to have a strong influence on the extent of breakdown, esp. in the case of altered starting materials. In this study the progressive stages of the breakdown of zircon grains are described. The factors that may govern the decompn. are discussed, including radiation damage, secondary alteration and external reaction conditions (sample container, atm.). Alumina crucibles should generally be avoided in dry annealing of zircon, to minimise uncontrolled breakdown into oxides.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Johannes Gutenberg-Universität Mainz, Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum

Journal

Mineralogy and Petrology

Band

97

Seiten

129-138

Anzahl der Seiten

10

ISSN

0930-0708

DOI

https://doi.org/10.1007/s00710-009-0087-9

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie, 1051 Geologie, Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/1a90419c-93b3-4b0b-a094-e00df691a2ce