Muscovite and its melting relations in the system KAlSi 3 O 8 ---H 2 O

Details Muscovite and its melting relations in the system KAlSi 3 O 8 ---H 2 O Muscovite and its melting relations in the system KAlSi 3 O 8 ---H 2 O

Sep 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965gecoa..29.1077s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 29, Issue 9, pp.1077-1084

Physics

3

Scientific paper

At low partial pressures of water and high temperatures orthoclase melts incongruently to leucite plus liquid. At somewhat higher partial pressures of water orthoclase melts congruently to hydrous liquid and at still higher pressure orthoclase reacts with water to form muscovite + fluid or fluids. Muscovite in turn reacts with the fluid and disappears at still higher temperatures. The reaction of orthoclase with high pressure water, which forms muscovite, results in fluids enriched in potassium and silica. These fluids may escape from a cooling granitic mass and at lower temperatures and pressures introduce by reaction substantial amounts of either orthoclase, sericite or muscovite into their host rocks.

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