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Contributions to Mineralogy and Petrology

, Volume 146, Issue 4, pp 463–484 | Cite as

A new experimental technique for extracting liquids from peridotite at very low degrees of melting: application to partial melting of depleted peridotite

  • Didier LaporteEmail author
  • Michael J. Toplis
  • Monique Seyler
  • Jean-Luc Devidal
Original Paper

Abstract

A new technique that allows extraction of liquids from peridotite at degrees of melting φ as low as 0.2 wt% is presented. Microfractures that formed in the graphite sample container at the beginning of the experiments were used as traps for the liquid phase. Glass-filled cracks (or 'microdikes') unaffected by quench crystallisation were produced in all experiments and were analysed using standard electron microprobe techniques. Reversal experiments demonstrated that, at moderate degrees of melting (4.4 and 6.5 wt%), the segregated liquid was in equilibrium with the neighbouring peridotite. At very low degrees of melting (0.3 wt%), the liquid in the microdikes failed to fully equilibrate with the peridotite after 5 days and the sandwich technique was used in combination with the microdike technique to approach more closely the equilibrium composition of near-solidus partial melts. The microdike technique was used to study melting of a depleted peridotite at 1 GPa and 1,220 to 1,360 °C.

Keywords

Glass Composition Reversal Experiment Interstitial Liquid Backscatter Electron Micrographs Platinum Capsule 
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.

Notes

Acknowledgements

This study has benefited from discussions with Etienne Médard, Pierre Schiano, Edward Stolper and Daniel Vielzeuf. Special thanks are due to the following persons and services: Ariel Provost for his mass-balance program; Pierre Boivin for his CIPW-norm program and for much technical advice; Michèle Veschambre for technical assistance with the electron probe microanalysis; Etienne Deloule for ion microprobe analyses; Catherine Mével for launching this research program; Christiane Wagner and Michel Fialin for measuring the ratio Fe3+/(Fe2++Fe3+) in glass rev8c; Antoine Bézos and Eric Humler for providing a piece of JDF-D2 MORB glass standard; and the Service d'Analyse des Roches et Minéraux (CRPG, Nancy) for the ICP-AES analyses in Table 1. The manuscript was improved by the careful reviews of Dana Johnston and Marc M. Hirschmann. This research program was supported by the Institut National des Sciences de l'Univers (INSU-CNRS), through grant 98-Dorsales-02 and in part by the European Community's Human potential Programme under contract HPRN-CT-2002-00211 [Euromelt]. Contribution INSU-CNRS 343.

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Didier Laporte
    • 1
    Email author
  • Michael J. Toplis
    • 2
  • Monique Seyler
    • 3
  • Jean-Luc Devidal
    • 1
  1. 1.Laboratoire Magmas et VolcansCNRS et Université Blaise Pascal, OPGCClermont-FerrandFrance
  2. 2.CRPG-CNRS, BP20Vandoeuvre-lès-NancyFrance
  3. 3.Laboratoire de Géosciences Marines, CNRS-UMR 7097Institut de Physique du Globe de Paris, Case 8975252 Paris cedex 05France

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