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Governador Valadares, Doce valley, Minas Gerais, Southeast Region, Brazil
© 2003 John H. Betts
| Name: | From the garnet group members that constitute the series (Pyrope and Grossular) | |||||||||||||||||||||||||||||||||||||||
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| A series between Pyrope and Grossular The xenoliths of garnet–clinopyroxene–disthene rocks (grospydites and associated kyanite eclogites) from the Zagadochnaya kimberlite pipe in Yakutia have been studied in detail. Contrary to previous data, the presence of a continuous range in the pyrope-grossular series of garnets is shown on the basis of numerous X-ray data and 17 chemical analyses of garnets. This conclusion is confirmed by the study of separate grains with kyanite intergrowths from the kimberlite heavy fraction, which are present in the kimberlite as the result of destruction of grospydite xenoliths, and possible, of garnet-kyanite rocks also (Sobolev, et al (1968); Oxford Journals, Journal of Petrology (abstract)). | ||||||||||||||||||||||||||||||||||||||||
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Classification of Pyrope-Grossular Series | |
| mindat.org URL: | http://www.mindat.org/min-29199.html Please feel free to link to this page. |
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Other Information | |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
References for Pyrope-Grossular Series | |
| Reference List: | Sobolev, N.V., Jr., Kuznetsova, I.K., and Zyuzin, N.I. (1968) The petrology of grospydite xenoliths from the Zagadochnaya Kimberlite pipe in Yakutia. Journal of Petrology: 9: 253-280. Sobolev, N.V., Schertl, H.-P., and Burchard, M. (2001) An unusual pyrope-grossular garnet and its paragenesis from diamondiferous carbonate-silicate rocks of the Kokchetav Massif, Kazakhstan. Doklady Earth Sciences: 380: 791-794. Vinograd, V.L., Sluiter, M.H.F., Winkler, B., Putnis, A., Halenius, U., Gale, J.D., and Becker, U. (2004) Thermodynamics of mixing and ordering in pyrope-grossular solid solution. Mineralogical Magazine: 68: 101-121. |
Articles/Blogs about Pyrope-Grossular Series | |
Internet Links for Pyrope-Grossular Series | |
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