EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET
The partitioning of Fe and Mg between garnet and olivine has been determined as a function of Fe/Mg ratio at 1000°C and 9.1 kbar. Garnets of composition XgtFe = 0.90, 0.82, 0.60, 0.51, and 0.35 were mixed with olivines of various compositions in a ratio of 10:1 by mass, and the equilibrium olivine c...
| প্রধান লেখক: | , |
|---|---|
| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
1989
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| _version_ | 1826282406263390208 |
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| author | Hackler, R Wood, B |
| author_facet | Hackler, R Wood, B |
| author_sort | Hackler, R |
| collection | OXFORD |
| description | The partitioning of Fe and Mg between garnet and olivine has been determined as a function of Fe/Mg ratio at 1000°C and 9.1 kbar. Garnets of composition XgtFe = 0.90, 0.82, 0.60, 0.51, and 0.35 were mixed with olivines of various compositions in a ratio of 10:1 by mass, and the equilibrium olivine composition was determined within narrow limits. The magnitudes of the garnet interaction parameters are highly correlated with those of the olivine solution. However, assuming WolFeMg = WolMgFe = 9000 J/mol (two-site basis), we obtain WgtFeMg 2080 ± 1250 J/mol and WgtMgFe = 6350 ± 880 J/mol (three-site basis) at 1000°C. The standard-state free-energy change of the exchange reaction is calculated to be -2000 ± 800 J at 1000°C and 1 bar, in agreement with recent estimates of the free energy of almandine. -from Authors |
| first_indexed | 2024-03-07T00:43:22Z |
| format | Journal article |
| id | oxford-uuid:83d20f7c-a652-4564-b63b-bd39c334cb94 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:43:22Z |
| publishDate | 1989 |
| record_format | dspace |
| spelling | oxford-uuid:83d20f7c-a652-4564-b63b-bd39c334cb942022-03-26T21:46:44ZEXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNETJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:83d20f7c-a652-4564-b63b-bd39c334cb94EnglishSymplectic Elements at Oxford1989Hackler, RWood, BThe partitioning of Fe and Mg between garnet and olivine has been determined as a function of Fe/Mg ratio at 1000°C and 9.1 kbar. Garnets of composition XgtFe = 0.90, 0.82, 0.60, 0.51, and 0.35 were mixed with olivines of various compositions in a ratio of 10:1 by mass, and the equilibrium olivine composition was determined within narrow limits. The magnitudes of the garnet interaction parameters are highly correlated with those of the olivine solution. However, assuming WolFeMg = WolMgFe = 9000 J/mol (two-site basis), we obtain WgtFeMg 2080 ± 1250 J/mol and WgtMgFe = 6350 ± 880 J/mol (three-site basis) at 1000°C. The standard-state free-energy change of the exchange reaction is calculated to be -2000 ± 800 J at 1000°C and 1 bar, in agreement with recent estimates of the free energy of almandine. -from Authors |
| spellingShingle | Hackler, R Wood, B EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title | EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title_full | EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title_fullStr | EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title_full_unstemmed | EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title_short | EXPERIMENTAL-DETERMINATION OF FE AND MG EXCHANGE BETWEEN GARNET AND OLIVINE AND ESTIMATION OF FE-MG MIXING PROPERTIES IN GARNET |
| title_sort | experimental determination of fe and mg exchange between garnet and olivine and estimation of fe mg mixing properties in garnet |
| work_keys_str_mv | AT hacklerr experimentaldeterminationoffeandmgexchangebetweengarnetandolivineandestimationoffemgmixingpropertiesingarnet AT woodb experimentaldeterminationoffeandmgexchangebetweengarnetandolivineandestimationoffemgmixingpropertiesingarnet |