New K-Ar isotopic ages of schists from Nordenskjöld Coast, Antarctic Peninsula: oldest part of the Trinity Peninsula Group?

@article{Smellie1995NewKI,
  title={New K-Ar isotopic ages of schists from Nordenskj{\"o}ld Coast, Antarctic Peninsula: oldest part of the Trinity Peninsula Group?},
  author={John L. Smellie and Ian L. Millar},
  journal={Antarctic Science},
  year={1995},
  volume={7},
  pages={191 - 196}
}
K-Ar whole-rock dating of five samples of quartz-mica schist from the Nordenskjöld Coast, eastern Graham Land, provides the first unequivocal evidence of pre-Triassic (> 249 ± 7 Ma) deposition of a sequence regarded as part of the Trinity Peninsula Group (TPG). A maximum age range of latest Carboniferous (< c. 300 Ma)–Permian for deposition of the Nordenskjöld Coast sequence is indicated, and a polymetamorphic, polydeformational history for the TPG in northern Graham Land. However, the… 
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