 | Brotzu, P., Gomes, C.B., Melluso, L., Morbidelli, L., Morra, V., Ruberti, E. (1997) Petrogenesis of coexisting SiO2-undersaturated to SiO2-oversaturated felsic igneous rocks: The alkaline complex of Itatiaia, southeastern Brazil. Lithos, 40 (2) 133-156 doi:10.1016/s0024-4937(97)00007-8 | Journal (article/letter/editorial) | | felsic igneous rocks: The alkaline complex of Itatiaia, southeastern Brazil P. Brotzu a, C.B. Gomes b...Napoli, Italy b Instituto de Geocihbas, Universidade de Skio Paula, Siio Paula, Brazil ’ Dipam’mento di Scienze...December 1996; accepted 1 April 1997 The Itatiaia aWine complex is a Late Cretaceous intrusion (72 Myr)...arranged concentrically, with the core of the complex being formed by SiO,-oversaturated syenites (with...crystallization processes dominated by alkali feldspar removal. Sr-isotopic data indicate more radiogenic |  | | Journal (article/letter/editorial) | | (1995) 425-440 Late Cretaceous alkaline complexes, southeastern Brazil: Paleomagnetism and geochronology...b, K. Kawashita ’ a Nkleo de Pesquisa em Geoquimica e Geofisica da Litosfera da Universidade de S~O...Paula, Brazil b Departamento de Geofisica, Institute Astrokmico e Geofiico da Universidade de Silo Paul0...Paula, Brazil ’ Centro de Pesquisas Geocronolbgicas, Institute de Geoci&cias da Universidade de S~O Paula...Silo Paulo, Brazil Received 4 May 1995; accepted 17 July 1995 Abstract Late Cretaceous alkaline rocks from |  | | Report (chapter) | | Geochronology (Ar/Ar and K– Ar) of the South Atlantic post-break-up magmatism M. C. GERALDES1*, A. MOTOKI1...Universidade do Estado do Rio de Janeiro (DGRG/UERJ), Rio de Janeiro, Brazil 2 Programa de Posgraduação, Faculdade...Faculdade de Geologia, UERJ, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil *Corresponding...to the Cabo Granite (104 Ma) are observed in NE Brazil. In West Africa, sparse Aptian–Albian ages are...Brazilian margin, an east–west alkaline magmatic trend is observed from Poços de Caldas to Cabo Frio, comprising |  | Barbosa, Sofia, Dias, António, Durão, Diogo, Grilo, José, Baptista, Gonçalo, Cagiza, Jonhsman, Pessanha, Sofia, Simão, Joaquim, Almeida, José (2022) Exploring High-Resolution Chemical Distribution Maps of Incompatible and Scarce Metals in a Nepheline Syenite from the Massif of “Serra de Monchique” (Portugal, Iberian Peninsula) Minerals, 12 (9) 1178 doi:10.3390/min12091178 | Journal (article/letter/editorial) | | in a Nepheline Syenite from the Massif of “Serra de Monchique” (Portugal, Iberian Peninsula) Sofia Barbosa...in a Nepheline Syenite from the Massif of “Serra de Monchique” (Portugal, Iberian Peninsula). Minerals...performed in the nepheline syenite (NS) of “Serra de Monchique” located in the southwest region of Portugal...phases such as Rb and Ga, or exclusively in K-bearing feldspar phases, as it is the case of Sr. Interesting...materials (CRMs) in nepheline syenites of the “Serra de Monchique”, located in the northwest region of the |  | Lorenz, Melanie, Altenberger, Uwe, Trumbull, Robert B., Lira, Raúl, López de Luchi, Mónica, Günter, Christina, Eidner, Sascha (2019) Chemical and textural relations of britholite- and apatite-group minerals from hydrothermal REE mineralization at the Rodeo de los Molles deposit, Central Argentina. American Mineralogist, 104 (12) 1840-1850 doi:10.2138/am-2019-6969 | Journal (article/letter/editorial) | | from hydrothermal REE mineralization at the Rodeo de los Molles deposit, Central Argentina Melanie Lorenz1...Altenberger1, Robert B. Trumbull2, Raúl Lira3, Mónica López de Luchi4, Christina Günter1, and Sascha Eidner5 Institute...Germany 3 CONICET, Museo de Mineralogía y Geología “Drive A. Stelzner,” Facultad de Ciencias Exactas, Físicas... X5000JJC Córdoba, Argentina 4 IGNEIS, Instituto de Geocronología y Geología Isotópica, CONICET, University...P)O4]3(OH,F) are widespread rare-earth minerals in alkaline rocks and their associated metasomatic zones, |  | Gronen, Lars Hans, Sindern, Sven, Katzmarzyk, Janet Lucja, Bormann, Udo, Hellmann, André, Wotruba, Hermann, Meyer, F. Michael (2019) Mineralogical and Chemical Characterization of Zr-REE-Nb Ores from Khalzan Buregtei (Mongolia)—Approaches to More Efficient Extraction of Rare Metals from Alkaline Granitoids. Minerals, 9 (4) 217 doi:10.3390/min9040217 | Journal (article/letter/editorial) | | More Efficient Extraction of Rare Metals from Alkaline Granitoids Lars Hans Gronen 1, * , Sven Sindern...April 2019; Published: 5 April 2019 Abstract: Alkaline rocks are worldwide observed as hosts for rare...deposits; alkaline rocks; automated mineralogy; Khalzan Buregtei 1. Introduction Alkaline granite and...element composition of alkaline rocks is in line with elevated abundances of complex and rare HFSE minerals...reasons [4]. As a response to this situation, alkaline granite and syenite complexes have also come into |  | Cucciniello, Ciro, Melluso, Leone, le Roex, Anton P., Jourdan, Fred, Morra, Vincenzo, de’ Gennaro, Roberto, Grifa, Celestino (2017) From olivine nephelinite, basanite and basalt to peralkaline trachyphonolite and comendite in the Ankaratra volcanic complex, Madagascar: 40 Ar/ 39 Ar ages, phase compositions and bulk-rock geochemical and isotopic evolution. Lithos, 274. 363-382 doi:10.1016/j.lithos.2016.12.026 | Journal (article/letter/editorial) | | trachyphonolite and comendite in the Ankaratra Volcanic Complex, Madagascar: 39Ar/40Ar ages, phase compositions...P. le Roex, Fred Jourdan, Vincenzo Morra, Roberto de’ Gennaro, Celestino Grifa PII: DOI: Reference: ...le Roex, Anton P., Jourdan, Fred, Morra, Vincenzo, de’ Gennaro, Roberto, Grifa, Celestino, From olivine...trachyphonolite and comendite in the Ankaratra Volcanic Complex, Madagascar: 39Ar/40Ar ages, phase compositions...trachyphonolite and comendite in the Ankaratra Volcanic Complex, Madagascar: 39Ar/40Ar ages, phase T compositions |  | Minissale, Silvia, Zanetti, Alberto, Tedesco, Dario, Morra, Vincenzo, Melluso, Leone (2019) The petrology and geochemistry of Nyiragongo lavas of 2002, 2016, 1977 and 2017 AD, and the trace element partitioning between melilitite glass and melilite, nepheline, leucite, clinopyroxene, apatite, olivine and Fe-Ti oxides: a unique scenario. Lithos, 332. 296-311 doi:10.1016/j.lithos.2019.02.023 | Journal (article/letter/editorial) | | almandine (Fe), Cr2O3 (Cr), rhodonite (Mn), orthoclase (K), apatite (P), fluorite (F), barite (Ba), strontianite...potassic, as is commonplace in other mafic/ultramafic alkaline rocks of the western branch of the West African...2012; Pouclet et al., 2017). The P.I. [molar (Na + K)/Al] is 1.04–1.06, hence the bulk-rocks are weakly...glass is slightly peralkaline (P.I., molar (Na + K)/Al = 1.12 ± 0.07). Also the glass composition of...been found in the 1977 lava (Fig. 4b). The Na/(Na + K) ratio of nepheline varies significantly (0.58–0.76; |  | | Journal (article/letter/editorial) | | followed by weathering. Due to their possible complex geological evolution, the deportment of the elements...ore mineralogy is also very complex, with different minerals having complex chemical and crystallographic...REE-fluoro-carbonates [24]. Many REE minerals have a complex mineral chemistry with light REE (LREE, elements...identification by chemical analysis. The often complex and multistage geological processes of REE enrichment...hydration and dehydration. This often results in a complex REE mineral assemblage. Mineral phases are defined |  | | Book | | to More Efficient Extraction of Rare Metals from Alkaline Granitoids Reprinted from: Minerals 2019, 9, 217...Butcher,IrisMcElroy, DominiqueBrisingandGavynK.Rollinson Automated Quantitative Mineralogy Optimized...article by Gronen et al. [19] on Zr-REE-Nb ores from alkaline granitoids in Mongolia addresses the problem of...possibility for how to relate the EDS spectra from the complex and variable REE mineral phases in an ore to mineral...Sutherland, D.; Ho-Tun, E.; Suthers, S.; Perera, K.; Jenkins, B.; Spencer, S.; Butcher, A.; Rayner, J |
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