| | Journal (article/letter/editorial) | and then drops when olivine (5kbar) or olivine + ilmenite (latin: FMQ-1) precipitate. At 1 atm and NNO (nickel-nickel...(nickel-nickel oxide), the presence of both magnetite and ilmenite as near liquidus phases induces a density decrease...Tj6rn. Isograd patterns (opx orthopyroxene, osum osumilite, pig pigeonite) after Hermans et al. (1975) I...Nielsen and Wilson (1991)], (plag plagioclase, Jim ilmenite, opx low-Ca pyroxene, oliv olivine, mgt magnetite...which are overlain by plag.ioclase + hypersthene + ilmenite cumulates and then by norltes. The roof of the | | Elmi, Chiara, Brigatti, Maria Franca, Pasquali, Luca, Montecchi, Monica, Laurora, Angela, Malferrari, Daniele, Nannarone, Stefano (2010) Crystal chemistry, surface morphology and X-ray photoelectron spectroscopy of Fe-rich osumilite from Mt. Arci, Sardinia (Italy) Physics and Chemistry of Minerals, 37 (8) 561-569 doi:10.1007/s00269-010-0357-4 | Journal (article/letter/editorial) | and X-ray photoelectron spectroscopy of Fe-rich osumilite from Mt. Arci, Sardinia (Italy) Chiara Elmi •...applied on Fe-rich osumilite from the volcanic massif of Mt. Arci, Sardinia, Italy. Osumilite belongs to the...state and at the A octahedral site. Keywords Osumilite Mt. Arci (Sardinia Italy) Crystal structure... X-ray absorption spectroscopy Introduction Osumilite structure was first addressed by Miyashiro (1956)...(1956). The mineral belongs to the osumilite group (Back and Mandarino 2008), crystallizes in the space | | | Journal (article/letter/editorial) | o g a l a n d (Southern N o r w a y ) , their occurrence has been r e p o r t e d by T o b i et al. (1985)..."hypersthene-in" line in leucocratic rocks; "osumilite-in" and "pigeonite-in" isograds (Fig. 1). The...and is located between the hypersthene-in and osumilite-in ones. Pressure estimates for M2 stage are still...pressure (3 4 kbar) on the basis of the osumilite occurrence in the contact aureole of the Bjerkreim-Sokndal...rocks. Isograd patterns (opx, orthopyroxene; osum osumilite; pig, pigeonite) after Hermans et al. (1975). | | | Journal (article/letter/editorial) | Editor: T. Tsunogae Keywords: UHT metamorphism Osumilite Supercontinent Columbia Siberian Craton Angara-Kan...r a c t We report here for the first time the occurrence of sapphirine-bearing rocks within the Paleoproterozoic...mesoperthitic feldspar and pseudomorphoses after osumilite crystals. The peak temperature of metamorphism...and Turkina, 2014a; Likhanov et al., 2016). The occurrence of ultrahigh-temperature metamorphism (T = 900–1100...Osm* + Sil + Mper+Bt + Pl + Qz, where Osm* - osumilite was replaced by mineral symplectite. The inner |
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