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The ilmenite/titano-magnetite assemblage - Kinetics of re-equilibrationThe petrogenesis of igneous and metamorphic rocks is a function of several parameters. Of these, temperature and pressure are of particular importance. Information concerning these two parameters is obtained through the use of mineral indicators. One such commonly used geothermometer/oxybarometer is that involving ilmenite/titano-magnetite. Anomalously low temperatures have been reported in cases in which the geothermometer/oxybarometer was employed. The studies suggest that low temperatures result from slow cooling rates which allows the Fe-Ti oxides to re-equilibrate. The current investigation is mainly concerned with the kinetics of the reduction of ilmenite-hematite solid solution, since this is the slower and, consequently, rate-controlling step in the re-equilibration process. The reaction rates determined for the reduction of ilmenites in the investigation are geologically rapid and must be considered when applying the considered geothermometer/oxybarometer.
Document ID
19830034087
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hammond, P. A.
(Tennessee Univ. Knoxville, TN, United States)
Taylor, L. A.
(Tennessee, University Knoxville, TN, United States)
Date Acquired
August 11, 2013
Publication Date
November 1, 1982
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 61
Issue: 1
Subject Category
Geophysics
Accession Number
83A15305
Funding Number(s)
CONTRACT_GRANT: NGT-43-001-800
CONTRACT_GRANT: NGL-43-001-140
Distribution Limits
Public
Copyright
Other

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