Maaløe, Sven and Wyllie, Peter J. (1979) The join grossularite-pyrope at 30 kb and its petrological significance. American Journal of Science, 279 (3). pp. 288-301. ISSN 0002-9599. http://resolver.caltech.edu/CaltechAUTHORS:20160203-074923418
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Abstract
The pseudobinary join grossularite-pyrope was investigated at 30 kb nominal pressure at temperatures between 1300° and 1725°C, using piston-cylinder apparatus. Grossularite melts incongruently to gehlenite + liquid at 1545°C, and pyrope melts incongruently to spinel+ liquid at 1705°C. Aluminous diopside forms a congruent compound within the join and melts at 1595°C. The join has two binary eutectics, where diopside is in equilibrium with either grossularite-rich garnet or pyrope-rich garnet. All eutectic compositions are on the join, and the join is a thermal barrier at 30 kb within the system CaSiO_3-MgSiO_3-Al_2O_3. The phase relations suggest that nephelinites might have formed at pressures near or above 30 kb, and that nephelinites fractionate toward a thermal minimum on the garnet + diopside liquid surface, with eclogitic mineralogy.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1979 American Journal of Science. The authors gratefully acknowledge the National Science Foundation for grant EAR 76-20410 and the general support of the Materials Research Laboratory. The senior author being a research visitor at P. J. Wyllie's laboratory gratefully acknowledges grant 511-2919 from the Danish Natural Science Research Council. | |||||||||
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| Record Number: | CaltechAUTHORS:20160203-074923418 | |||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20160203-074923418 | |||||||||
| Official Citation: | S. Maaloee and P. J. Wyllie The join grossularite-pyrope at 30 kb and its petrological significance Am J Sci March 1, 1979 279:288-301; doi:10.2475/ajs.279.3.288 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 64179 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 03 Feb 2016 23:24 | |||||||||
| Last Modified: | 03 Feb 2016 23:24 |
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