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Related to pneumatolytic: pneumatolytic stage


 (no͞o′mə-tŏl′ĭ-sĭs, nyo͞o′-)
A process of rock alteration or mineral formation brought about by the action of gases emitted from solidifying magma.

pneu′ma·to·lyt′ic (-tə-lĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Geological Science) geology resulting from pneumatolysis
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
Negative [delta][sup.11]B values were explained by the influence of pneumatolytic fluids associated with granitic pegmatites.
Alteration refers to those changes which occur in the chemical or mineralogical composition of a rock brought about by permeating hydrothermal fluids or by pneumatolytic action.
This intrusion phase activated a high-temperature pneumatolytic to hydrothermal circulation of fluids that was concentrated along rock discontinuities, metasomatically altering the sedimentary rock into a skarn and depositing andradite in cavities.