Plumbing the depths of batholiths

American Journal of Science


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Knowledge of the pressure of consolidation of a pluton and the pressure-time history of magmatic evolution should allow better understanding of the tectonic and thermal history of the crust. Available methods to estimate pressures of plutons are mainly for those of consolidation. These are either extrinsic, based on geological context, or intrinsic, based on mineral texture, mineral assemblage, fluid inclusions, mineral inclusions, apparent cooling rates, and mineral chemistry. The methods of lattice-dimension matching of mineral inclusions and of detailed chemistry for zoned minerals could lead to pressure-time reconstructions. Future barometers based on mineral chemistry should use atomic species that have low diffusion coefficients and whose values are not sensitive to computational schemes and cumulative analytical errors. Aluminum and silicon in coexisting hornblende, biotite, pyroxene, plagioclase, or garnet are reasonable candidate phases for barometry. -from Author
Publication type Article
Publication Subtype Journal Article
Title Plumbing the depths of batholiths
Series title American Journal of Science
Volume 289
Issue 10
Year Published 1989
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title American Journal of Science
First page 1137
Last page 1157
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