Precise Time and Conditions of Peak Taconian Granulite Facies Metamorphism in the Southern Appalachian Orogen, U.S.A., with Implications for Zircon Behavior during Crustal Melting Events

@article{Moecher2004PreciseTA,
  title={Precise Time and Conditions of Peak Taconian Granulite Facies Metamorphism in the Southern Appalachian Orogen, U.S.A., with Implications for Zircon Behavior during Crustal Melting Events},
  author={David P. Moecher and Scott D. Samson and Calvin F. Miller},
  journal={The Journal of Geology},
  year={2004},
  volume={112},
  pages={289 - 304}
}
The time of peak thermal conditions in the granulite facies zone of the southern Appalachian orogen corresponds to the time of formation of garnet‐bearing leucosomes generated by biotite dehydration melting in garnet‐sillimanite gneisses. Leucosomes contain unusually abundant zircon occurring as inclusions in euhedral plagioclase phenocrysts and garnet. Isotope dilution thermal‐ionization mass spectrometric analysis of 13 elongate, euhedral zircon crystals from the leucosome yields a concordant… 

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