Conclusion
In summary, there are no existing clinopyroxene-liquid REE distribution data obtained under appropriate conditions to permit numerical modeling of trace elements to constitute a critical test of the pyroxene fractionation process. There are, however, numerous clinopyroxeneliquid partitioning data in the literature that give qualitatively similar patterns to those observed in grospydites. Further, the high pressure fractionation model accounts for the major-element and exsolution phenomena in a manner directly consistent with experimental petrologic studies, and can qualitatively account for the trace element and isotopic characteristics of the rocks in a manner consistent with the crystal chemistry of the phases. We therefore continue to prefer the high-pressure clinopyroxene fractionation model over a low-pressure plagioclase fractionation model for the origin of the grospydites.
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Caporuscio, F.A., Smyth, J.R. Reply to comments by Taylor and Neal on “Trace element crystal chemistry of mantle eclogites”. Contr. Mineral. and Petrol. 113, 285–288 (1993). https://doi.org/10.1007/BF00283235
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DOI: https://doi.org/10.1007/BF00283235