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metasomatism

[met-uh-soh-muh-tiz-uh m] /ˌmɛt əˈsoʊ məˌtɪz əm/
noun, Geology
1.
the series of metamorphic processes whereby chemical changes occur in minerals or rocks as a result of the introduction of material, often in hot aqueous solutions, from external sources.
2.
replacement (def 4).
Also, metasomatosis.
Origin
1885-1890
1885-90; meta- + somat- + -ism
Related forms
metasomatic
[met-uh-soh-mat-ik] /ˌmɛt ə soʊˈmæt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for metasomatism
  • The breccias are intensively altered by hydrothermal-metasomatism with a well-defined definite mineralogical zoning.
British Dictionary definitions for metasomatism

metasomatism

/ˌmɛtəˈsəʊməˌtɪzəm/
noun
1.
change in the composition of a rock or mineral by the addition or replacement of chemicals
Word Origin
C19: from New Latin; see meta-, somato-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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metasomatism in Science
metasomatism (mět'ə-sō'mə-tĭz'əm) also metasomatosis
  (mět'ə-sō'mə-tĭz'əm)   
The process by which the chemical composition of a rock is changed through the introduction or extraction of chemicals dissolved in fluids that migrate through the rock's pores. Metasomatism often results in the formation of new minerals, especially metal ore deposits.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Difficulty index for metasomatism

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Word Value for metasomatism

18
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