Contributions to Mineralogy and Petrology

, Volume 147, Issue 6, pp 684–704 | Cite as

Melt inclusion formation mechanisms and compositional effects in high-An feldspar and high-Fo olivine in anhydrous mafic silicate liquids

Original Paper
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Abstract

Important aspects of melt inclusion formation and potential compositions effects have been addressed through a series of experiments using anorthite/fosterite saturated anhydrous mafic liquids. Experimental charges were cooled from 1,300 to 1,230 and 1,210°C at rates of 1–10°/min followed by 0–24 h isothermal periods. Hopper and skeletal crystal morphologies with variable degrees of completeness developed during the cooling period. Planar overgrowth of these textures during isothermal periods led to the formation of inclusions, the majority of which formed after 6 h of isothermal run time. We suggest that the change in morphologies is related to a decrease in growth rates and changes in dominant growth mechanisms. In general, inclusion compositions were uniform and similar to the host glass, indicating that with the isothermal times required for most inclusions to form, a boundary layer was not entrapped that could be detected within the limits of our analyses.

Keywords

Olivine Inclusion Composition Host Glass Isothermal Period Isothermal Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

We wish to thank L. Danyushevsky and editor T. Grove for their helpful comments and suggestions, and an anonymous reviewer for their concerns and the very useful suggestion to compare inclusion sizes and compositions. This work was funded by NSF grant EAR 9903137.

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Department of GeosciencesOregon State UniversityCorvallisUSA

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