Journal of Earth Science

, Volume 29, Issue 2, pp 245–254 | Cite as

Time Scale of Partial Melting of KLB-1 Peridotite: Constrained from Experimental Observation and Thermodynamic Models

  • Wei Du
  • Li Li
  • Donald J. Weidner
Petrology and Mineral Deposits


Partial melting experiments were carried on KLB-1 peridotite, a xenolith sample from the Earth’s upper mantle, at 1.5 GPa and temperatures from 1 300 to 1 600 °C, with heating time varies from 1 to 30 min. We quantify the axial temperature gradient in the deformation-DIA apparatus (D-DIA) and constrain the time scale of partial melting by comparing experimental observations with calculated result from pMELTS program. The compositions of the liquid phase and the coexisting solid phases (clinopyroxene, orthopyroxene, and olivine) agree well with those calculated from pMELTS program, suggesting that local chemical equilibrium achieves during partial melting, although longer heating time is required to homogenize the bulk sample. The Mg# (=Mg/(Mg+Fe) mol.%) of olivines from the 1-minute heating experiment changed continuously along the axial of the graphite capsule. A thermal gradient of 50 °C/mm was calculated by comparing the Mg# of olivine grains with the output of pMELTS program. Olivine grains at the hot end of the graphite capsule from the three experiments heated at 1 400 °C but with different annealing time show consistence on Mg#, indicating that partitioning of Fe2+ between the olivine grains and the silicate melt happened fast, and partial melting occurs in seconds.

Key words

peridotite partial melting temperature gradient pMELTS program 


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KLB-1 samples used in this study were generously denoted by Prof. Claude Herzberg from Rutgers University. We thank Christopher A. Vidito from Rutgers University for his support with all the electron microprobe measurements and Jim Quinn from Stony Brook University for the SEM measurement. The authors acknowledge support by the National Natural Science Foundation of China (No. 41773052), and the National Science Foundation of USA (Nos. EAR 1141895, EAR 1045629, and EAR 0968823). The final publication is available at Springer via

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Copyright information

© China University of Geosciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Ore Deposit Geochemistry, Institute of GeochemistryChinese Academy of SciencesGuiyangChina
  2. 2.Mineral Physics Institute, Department of GeosciencesUniversity of New York at Stony BrookStony BrookUSA

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