Abstract: Potassium pargasite containing 3.19 wt. % K2O was found in a skarn from the islet of Einstödingen, Lützow-Holm Bay, East Antarctica, together with some high potassium pargasitic amphiboles. A positive correlation is shown between Fe2+/(Mg+Fe2+) and K/(K + Na(A)) ratios in pargasitic amphiboles suggesting that the increase of Fe2+ serve to stabilize high-K pargasites under the metamorphic conditions of the granulite facies.
Mineralogical Magazine; December 1985 v. 49; no. 354; p. 703-707; DOI: 10.1180/minmag.1985.049.354.09
© 1985, The Mineralogical Society
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