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American Mineralogist, Volume 93, pages 134143, 2008 0003-004X/08/0001134$05.00/DOI: 10.2138/am.2008.2623 134
 

Summary: American Mineralogist, Volume 93, pages 134143, 2008
0003-004X/08/0001134$05.00/DOI: 10.2138/am.2008.2623 134
* E-mail: kkelsey@pangea.stanford.edu
Present address: Air Products and Chemicals, Inc., Mail Code
R3205, 7201 Hamilton Boulevard, Allentown, Pennsylvania
18195-1501, U.SA.
IntroductIon
Garnets have a wide range of geologic occurrences in both
igneous and metamorphic rocks in the crust and mantle. For this
reason, garnets are often used in conjunction with other minerals
as thermo-barometers to understand the P-T-t history of rock
assemblages from a variety of geologic settings (Essene 1982;
Chakraborty and Ganguly 1991, 1992). In nature, garnets rarely
occur as pure end-members, and thus their solid-solution behav-
ior must be considered.The extent, if any, of cation ordering at the
X site (e.g., Ca2+
and Mg2+
) would affect the thermodynamic mix-
ing properties of a solid-solution garnet. Garnet composition and
the nature of cation ordering also affect trace element incorpora-

  

Source: Asimow, Paul D. - Division of Geological and Planetary Sciences, California Institute of Technology,

 

Collections: Geosciences