K-metasomatism of plagioclase to produce microcline megacrysts in the Cathedral Peak granodiorite, Sierra Nevada, California, USA

@inproceedings{Collins2001KmetasomatismOP,
  title={K-metasomatism of plagioclase to produce microcline megacrysts in the Cathedral Peak granodiorite, Sierra Nevada, California, USA},
  author={Lorence G. Collins and Barbara J. Collins},
  year={2001}
}
Higgins (1999) proposed that microcline megacrysts in the Cathedral Peak granodiorite resulted from Ostwald ripening in which textural coarsening of earlier formed small K-feldspar crystals were sacrificed to feed the growth of a select few larger crystals. Textural evidence shows that Ostwald ripening did not occur, but, instead, the megacrysts resulted from K-replacement of broken plagioclase crystals in sites of strong cataclasis, where tiny microcline crystals (1 to 15 mm in mean height… CONTINUE READING

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