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Role of water in the smectite-to-illite reaction

Clays & Clay Minerals

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Abstract

A series of hydrothermal experiments was performed to determine the effect of fluid abundance on the reaction of smectite to illite. Experiments were conducted on K-saturated montmorillonite in a closed system at 250?? to 400??C using run times of 1, 7, 14, 30, and 60 days at 100 MPa (1 kbar) pressure. In fluid-deficient systems, the rate and extent of illitization was significantly inhibited. The effect became less pronounced at higher temperatures. In addition, the low-fluid experiments produced fewer crystalline byproducts than did the fluid-rich runs, and the I/S was more difficult to disperse and orient in the fluid-deficient samples, suggesting enhanced cementation at grain contacts or the production of particle morphologies that did not lend themselves to orientation. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Role of water in the smectite-to-illite reaction
Series title:
Clays & Clay Minerals
Volume
38
Issue:
4
Year Published:
1990
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Clays & Clay Minerals
First page:
343
Last page:
350