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Morphogenetic evidence of the mantle fluid activityтезисы доклада
- Автор: Posukhova T.V.
- Сборник: IMA 2010 20th General Meeting of the International Mineralogical Association
- Серия: ACTA MINERALOGICA-PETROGRAPHICA ABSTRACT SERIES
- Том: 6
- Тезисы
- Год издания: 2010
- Место издания: ACTA UNIVERSITATIS SZEGEDIENSIS Budapesht, Hungary
- Первая страница: 156
- Аннотация: Diamonds and accompanying minerals from the Arkhangelsk kimberlites and different placers (Ural, Timan, North Yakutiya, Sierra-Leone, Chikapa) were investigated. Morphology, physical properties, and interior structure of the diamonds have been examined by different methods: SEM, IR-spectroscopy, X-ray tomography, Raman-spectroscopy, cathodoluminesence. Chemical composition of the accompanying minerals has been examined with EDS and WDS- micro-beam spectroscopy. It was established, that diamonds in all objects have a specific peculiarities. Such morphological peculiarities are form during the solution of the octahedron crystal in carbonate-silicate systems in presence of H20-CH4 fluids with С=О, -ОН, -НОН, СО3, СН2, СН3 groups at T=1300-1450оС and P=0,1-2,5 GPа.
- Добавил в систему: Посухова Татьяна Владимировна