 | | Journal (article/letter/editorial) | | and syenites of the Graciosa Province, southern Brazil Silvio R.F. Vlach a,⁎, Guilherme A.R. Gualda b...rocks of the Graciosa Province, southern Brazil. Allanite–(Ce) is the main REE phase in the granites of...weakly peraluminous granites – while chevkinite–(Ce) is the typical REE phase in the metaluminous syenites...complex zoning patterns but is always rich in the ferriallanite molecule and in TiO2, a compositional trait...metamictization caused by radioactive decay. Chevkinite–(Ce) is always primary and is only present in the alkaline |  | | Journal (article/letter/editorial) | | University of São Paulo, São Paulo CEP 05508-080, Brazil; srfvlach@usp.br; Tel.: +55-11-97413-5902 Citation:...from the Corupá Pluton of “A-type” granites and syenites in Graciosa Province, Southern Brazil, and are...Ti-in-zircon thermometry, and oxibarometry based on the Ce and Eu oxidation states and/or anomalies allow for...granite from Graciosa Province, South-Southeastern Brazil [30] is described. Morphological, textural, geochemical...Characterization The studied rock came from the Corupá Pluton (Figure 1), a Neoproterozoic (ca. 580 Ma, [25 |  | | Journal (article/letter/editorial) | | along the northwestern margin of the Strange Lake pluton, contains a lens-shaped, pegmatite-rich domain...spherules, gadolinite-group minerals, gittinsite, ferriallanite-(Ce), and a pervasive replacement of the granite...of primary REE-F-(CO2) minerals (e.g., bastnäsite-(Ce) host to LREE), zirconosilicates (i.e., Na zirconosilicates...stability of secondary LREE silicates (i.e., ferriallanite-(Ce)), HREE silicates (i.e., gadolinite-(Y)),...which are enriched in HREE. Hydrothermal ferriallanite-(Ce) and gadolinite-group minerals also show a |  | Anenburg, Michael, Katzir, Yaron, Rhede, Dieter, Jöns, Niels, Bach, Wolfgang (2015) Rare earth element evolution and migration in plagiogranites: a record preserved in epidote and allanite of the Troodos ophiolite. Contributions to Mineralogy and Petrology, 169 (3) doi:10.1007/s00410-015-1114-y | Journal (article/letter/editorial) | | the village of Spilia) contain coexisting ferriallanite-(Ce) and allanite-(Y). Textural and geochemical...melt facilitated crystallisation of magmatic ferriallanite(Ce). High REE contents persisted after fluid...occurs as closely associated allanite-(Y) and ferriallanite-(Ce), concentrated in epidote masses. This work...different mineral species: allanite-(Y) and ferriallanite-(Ce), based on the more dominant rare earth element...in this type (Fig. 6b). The second type, ferriallanite-(Ce), was observed both in Spilia and in Kyperounta |  | Uher, Pavel, Ondrejka, Martin, Bačík, Peter, Broska, Igor, Konečný, Patrik (2015) Britholite, monazite, REE carbonates, and calcite: Products of hydrothermal alteration of allanite and apatite in A-type granite from Stupné, Western Carpathians, Slovakia. Lithos, 236. 212-225 doi:10.1016/j.lithos.2015.09.005 | Journal (article/letter/editorial) | | primary magmatic allanite-(Ce) to ferriallanite-(Ce) and fluorapatite. The Y, Ce-rich fluorapatite was replaced...britholites. Moreover, the alteration of (ferri)allanite-(Ce) resulted to complex pseudomorphs and overgrowths...[synchysite-(Ce) to its hydroxyl-dominant analogue “hydroxylsynchysite-(Ce)”, bastnäsite-(Ce)] and calcite...calcite, rarely monazite-(Ce), epidote, clinochlore, titanite, TiO2 phase, and pseudorutile. In some cases...phenomena of primary magmatic fluorapatite and allanite-(Ce) to produce an uncommon assemblage of britholite |
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