CALCULATION OF TITANOMAGNETITE STABILITY ON THE LIQUIDUS OF BASALTS AND ANDESITES WITH SPECIAL REFERENCE TO THOLEIITIC MAGMA DIFFERENTIATION
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Ariskin A.A. | |
dc.date.accessioned | 2021-01-06T07:54:06Z | |
dc.date.available | 2021-01-06T07:54:06Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=35757452 | |
dc.identifier.citation | Geohimiya, 1998, , 1, 18-27 | |
dc.identifier.issn | 0016-7525 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/22318 | |
dc.description.abstract | A detailed review of experimental data on magnetite-melt equilibria in systems ranging from basalts to dacites is presented. This information (99 experiments) was processed statistically to yield the fol- lowing equation relating the crystallization temperature of magnetite to melt composition and oxygen fugacity: For 90% of the data, this equation reproduces experimental temperatures to a precision of ∠ 15°C ; the average deviation of the calculated temperatures from experimental ones is 9.3°C. The crystallization temperature of magnetite shows a complex dependence on oxygen fugacity: for ferrobasaltic and andesitic melts with moder- ate contents of Fe (up to ~ 15 wt %) and TiO 2 (up to ~ 2 wt %), there is a fairly steep slope of the magnetite liquidus ~ 20¡C/ , whereas, for high-Ti (4-5 wt % TiO 2 ) and Fe-rich (17-18 wt %) basalts, liquidus temperatures are virtually independent of oxygen fugacity and are near 1100°C. The equation for the magnetite liquidus can be used as an empirical basis for improving computer models of magma crystallization involving the separation of magnetite-bearing mineral assemblages. 10 4 T ∨ b 0 b 1 X SiO2 b 2 X TiO2 b 3 X FeOtot +++ () f O2 cd 1 X SiO2 d 2 X TiO2 d 3 X FeOtot d 4 X P2O5 . ++ + + + log = | |
dc.title | CALCULATION OF TITANOMAGNETITE STABILITY ON THE LIQUIDUS OF BASALTS AND ANDESITES WITH SPECIAL REFERENCE TO THOLEIITIC MAGMA DIFFERENTIATION | |
dc.type | Статья |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru