 | Nazzareni, Sabrina, Nestola, Fabrizio, Zanon, Vittorio, Bindi, Luca, Scricciolo, Enrico, Petrelli, Maurizio, Zanatta, Marco, Mariotto, Gino, Giuli, Gabriele (2019) Discovery of moissanite in a peralkaline syenite from the Azores Islands. Lithos, 324. 68-73 doi:10.1016/j.lithos.2018.10.036 | Journal (article/letter/editorial) | | of moissanite in a peralkaline syenite from the Azores Islands Sabrina Nazzareni, Fabrizio Nestola, Vittorio...of moissanite in a peralkaline syenite from the Azores Islands. Lithos (2018), https://doi.org/10.1016/j...of moissanite in a peralkaline syenite from the Azores Islands PT SABRINA NAZZARENIA,*, FABRIZIO NESTOLAB...Firenze, Firenze, Italy PT E d D Delgada, Portugal e f INFN, Perugia, Italy g CE Dipartimento...syenite from the Água de Pau Volcano (São Miguel, Azores Islands, Portugal) represents the first report of |  | Jeffery, A. J., Gertisser, R., O’Driscoll, B., Pacheco, J. M., Whitley, S., Pimentel, A., Self, S. (2016) Temporal evolution of a post-caldera, mildly peralkaline magmatic system: Furnas volcano, São Miguel, Azores. Contributions to Mineralogy and Petrology, 171 (5) doi:10.1007/s00410-016-1235-y | Journal (article/letter/editorial) | | peralkaline magmatic system: Furnas volcano, São Miguel, Azores A. J. Jeffery1 · R. Gertisser1 · B. O’Driscoll2...of three active central volcanoes on São Miguel Island, Azores, and is considered to be one of the most...Geológicos, University of the Azores, 9501‑801 Ponta Delgada, Azores, Portugal 4 Centro de Informação e...Sismovulcânica dos Açores, 9501‑801 Ponta Delgada, Azores, Portugal 5 Department of Earth and Planetary Science...basalt-trachyte suite of Furnas volcano, São Miguel, Azores (Fig. 1). Furnas volcano is an example of |  | | Journal (article/letter/editorial) | | the eastern North Atlantic, 54 titanite and 10 zircon fractions were dated by the U–Pb chronometer, and...Hf isotope ratios were measured in feldspars and zircon, respectively. Rocks analyzed are essentially trachy-andesites...Atlantic MORB, the Madeira Archipelago and the Azores, but they lie in the field of worldwide OIB. The...ocean–continent transition zone. Inheritance in zircon and high 207Pb of initial Pb substantiate the presence...Abyssal Plain Galicia Bank Tore seamount São Miguel Azores Fracture Zone AFRICAN PLATE J anomaly Lisbon |  | Prytulak, Julie, Avanzinelli, Riccardo, Koetsier, Govert, Kreissig, Katharina, Beier, Christoph, Elliott, Tim (2014) Melting versus contamination effects on 238U–230Th–226Ra and 235U–231Pa disequilibria in lavas from São Miguel, Azores. Chemical Geology, 381. 94-109 doi:10.1016/j.chemgeo.2014.04.030 | Journal (article/letter/editorial) | | and 235 U–231Pa disequilibria in lavas from São Miguel, Azores Julie Prytulak a,b,⁎, Riccardo Avanzinelli...online 21 May 2014 Editor: L. Reisberg Keywords: São Miguel U-series Contamination Pyroxenite/eclogite Dynamic...Dynamic melting a b s t r a c t The island of São Miguel, Azores piques geochemical interest due to a strikingly...(b50 wt.% SiO2) that encompass the full range of São Miguel's long-lived radiogenic isotope variability...alkali feldspar xenocrysts have been identified in São Miguel basalts. We argue that secondary contamination |  | | Journal (article/letter/editorial) | | multiple generations of recycled oceanic crust in Azores lavas Paul Béguelin, Michael Bizimis, Christoph...multiple generations of recycled oceanic crust in Azores lavas, Geochimica et Cosmochimica Acta (2017),...multiple generations of recycled oceanic crust in Azores lavas Paul Béguelin1*, Michael Bizimis1, Christoph...subaerial and submarine samples from the Azores islands of São Miguel, Terceira, Graciosa, Faial, Pico and...the Terceira Rift). In εNd-εHf isotope space all Azores lavas fall below the mantle array reference line |  | Snyder, Darin C., Widom, Elisabeth, Pietruszka, Aaron J., Carlson, Richard W., Schmincke, Hans-Ulrich (2007) Time scales of formation of zoned magma chambers: U-series disequilibria in the Fogo A and 1563 A.D. trachyte deposits, São Miguel, Azores. Chemical Geology, 239 (1) 138-155 doi:10.1016/j.chemgeo.2007.01.002 | Journal (article/letter/editorial) | | the Fogo A and 1563 A.D. trachyte deposits, São Miguel, Azores Darin C. Snyder a,⁎, Elisabeth Widom a ,...zoned trachyte deposits from Fogo volcano, São Miguel, Azores. High-precision U-series disequilibria measurements...disequilibria; Time scales; Magma chamber; Trachyte; Azores ⁎ Corresponding author. 254 Williamsburg Circle...magmatic systems. Fogo volcano on the island of São Miguel (Azores) has repeatedly erupted strongly compositionally...differentiating liquid. 2. Geologic setting The Azores Islands straddle the Mid-Atlantic Ridge (MAR) between |  | Cámara, F., Sokolova, E., Abdu, Y. A., Hawthorne, F. C., Charrier, T., Dorcet, V., Carpentier, J. -F. (2017) Fogoite-(Y), Na3Ca2Y2Ti(Si2O7)2OF3, a Group I TS-block mineral from the Lagoa do Fogo, the Fogo volcano, São Miguel Island, the Azores: Description and crystal structure. Mineralogical Magazine, 81 (2) 369-381 doi:10.1180/minmag.2016.080.103 | Journal (article/letter/editorial) | | the Lagoa do Fogo, the Fogo volcano, São Miguel Island, the Azores: Description and crystal structure F...new mineral from the Lagoa do Fogo, São Miguel Island, the Azores. It occurs in cavities as highly elongated...after the type locality, the Fogo volcano in the Azores. K E Y WO R D S : fogoite-(Y), crystal-structure...götzenite, hainite, Group I, Fogo volcano, the Azores. *E-mail: fernando.camara@unimi.it https://doi...2003). The Azores archipelago straddles the Mid-Atlantic Ridge and emerges from the Azores Platform, (37–40°N |  | Jeffery, A. J., Gertisser, R., Jackson, R. A., O'Driscoll, B., Kronz, A. (2016) On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores. Mineralogical Magazine, 80 (4) 547-565 doi:10.1180/minmag.2016.080.018 | Journal (article/letter/editorial) | | dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores A. J. JEFFERY1,*, R. GERTISSER1, R. A. JACKSON1...been identified for the first time on Terceira, Azores, within syenitic ejecta of the Caldeira-Castelinho...peralkaline, syenite, oceanic island magmatism, Terceira, Azores. Introduction DALYITE is a rare potassium zirconium...from the mildly peralkaline rocks of Terceira, Azores. We apply solid-state modelling to investigate...ET AL. ejecta from Agua de Pau volcano, São Miguel, Azores (Cann, 1967; Widom et al., 1993), where it |  | | Journal (article/letter/editorial) | | petrology of some ejected syenite blocks from $5o Miguel, Azores By J. R. CAN~ Department of Mineralogy and...of Serra de Agua de Pau (Lagoa do Fogo), S~o Miguel, Azores, in an assemblage sanidinearfvedsonite-qua...Other blocks from the same locality contain biotite-zircon in place of astrophyllite-dalyite. A comparisonmade...of Serra de Agua de Pau (Lagoa do Fogo), S~o Miguel, Azores, were first described in the last half of the...contain small flakes of brown biotite and prisms of zircon, but three specimens contain interstitial dalyite |  | Madureira, Pedro, Mata, João, Mattielli, Nadine, Queiroz, Gabriela, Silva, Pedro (2011) Mantle source heterogeneity, magma generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic (Sr, Nd, Hf, and Pb) data. Lithos, 126 (3) 402-418 doi:10.1016/j.lithos.2011.07.002 | Journal (article/letter/editorial) | | generation and magmatic evolution at Terceira Island (Azores archipelago): Constraints from elemental and isotopic...Universidade de Évora, R. Romão Ramalho, 59, 7000 Évora, Portugal Estrutura de Missão para os Assuntos do Mar, R...R. Costa Pinto, 165, 2770-047 Paço de Arcos, Portugal c Dep. de Geologia da Faculdade de Ciências da... Edifício C6, Campo Grande, 1749-016, Lisboa, Portugal d Department of Earth and Environmental Sciences...Científico, 3° Piso, Ala Sul, 9501-801, Ponta Delgada, Portugal f ISEL/ADEC, R. Conselheiro Emídio Navarro, 1 |  | LUSTRINO, MICHELE, MARRAZZO, MARIANNA, MELLUSO, LEONE, TASSINARI, COLOMBO C. G., BROTZU, PIETRO, GOMES, CELSO B., MORBIDELLI, LUCIO, RUBERTI, EXCELSO (2010) Petrogenesis of Early Cretaceous silicic volcanism in SE Uruguay: The role of mantle and crustal sources. GEOCHEMICAL JOURNAL, 44 (1) 1-22 doi:10.2343/geochemj.1.0042 | Journal (article/letter/editorial) | | Universidade de São Paulo, Rua do Lago, 562, Cidade Universitaria, DEP 05508-900, São Paulo, Brazil (Received...and Santa Lucía basins in the Lascano, Sierra São Miguel, Salamanca and Minas areas. They are mostly rhyolites...corresponding to the north-eastern (Lascano and Sierra São Miguel, emplaced on the Neo-Proterozoic southern sector...upper crustal lithologies, for Lascano and Sierra São Miguel rhyolites. In the Salamanca and Minas rocks genesis...Velàzquez Aiguà COLORADO BASIN Minas Sierra Sao Miguel ROCHA 55 00 I NT AT 0 mal anomaly, whose |  | Matteini, M., Dantas, E.L., Pimentel, M.M., de Alvarenga, C.J.S., Dardenne, M.A. (2012) U–Pb and Hf isotope study on detrital zircons from the Paranoá Group, Brasília Belt Brazil: Constraints on depositional age at Mesoproterozoic – Neoproterozoic transition and tectono-magmatic events in the São Francisco craton. Precambrian Research, 206. 168-181 doi:10.1016/j.precamres.2012.03.007 | Journal (article/letter/editorial) | | Neoproterozoic transition and tectono-magmatic events in the São Francisco craton M. Matteini a,∗ , E.L. Dantas a...U–Pb and Lu–Hf isotopes Paranoá Group Brasília belt São Francisco craton Crustal evolution a b s t r a c...Meso-Neoproterozoic in the western margin of the São Francisco paleocontinent. New in situ U–Pb and Lu–Hf...latter obtained on diagenetic xenotime overgrowth on zircon grains. Combined U–Pb and Lu–Hf data permitted...potential source areas identified in the São Francisco craton. Two zircon populations at 1.54 and 1.78 Ga, with |  | | Journal (article/letter/editorial) | | collision between the Pernambuco–Alagoas Massif and the São Francisco Craton during Neoproterozoic assembly of...collected at the hinge zones of F2 folds. A U–Pb SHRIMP zircon age of 628 ± 12 Ma was obtained for the pre-collisional...through continental collision between the Congo-São Francisco Craton and the Pernambuco–Alagoas Massif/domain...north to south: Macururé, Belo Monte–Jeremoabo, São Miguel do Aleixo and Itaporanga (Fig. 1). Three main...domains for large distances over the edge of the São Francisco Craton; a few granitic bodies have emplaced |  | | Journal (article/letter/editorial) | | the abandoned Ervedosa tin mine in north-eastern Portugal—M. Elisa P. Gomes and Paulo J.C. Favas The relationship...granitic pegmatites of the Pampean Ranges, Argentina— Miguel Angel Galliski and Petr Cern? The behavior of rare-earth...geochemistry, and zircon-forming processes—Fernando Bea, Pilar Montero, and Miguel Ortega Texture, composition...Plain region, Idaho: Using the SHRIMP detrital zircon 0361-0128/98/000/000-00 $6.00 633 653 661 665...Yeheng, Shen Kun, Zhang Zeming, and Tang Qian SHRIMP zircon U-Pb age, geochemistry, and Nd-Sr isotopes of the |  | Fernandes, Alexandre Martins, Conceição, Fabiano Tomazini da, Spatti Junior, Eder Paulo, Sardinha, Diego de Souza, Mortatti, Jeferson (2016) Chemical weathering rates and atmospheric/soil CO2 consumption of igneous and metamorphic rocks under tropical climate in southeastern Brazil. Chemical Geology, 443. 54-66 doi:10.1016/j.chemgeo.2016.09.008 | Journal (article/letter/editorial) | | de Ciência e Tecnologia 4 - USP – Universidade São Paulo, Centro de Energia Nuclear na Agricultura ...178, CEP 13506-900, RI P Bela Vista, Rio Claro, São Paulo, Brazil. Phone: +55 19 3526-9358. e-mail: ... igneous and metamorphic rocks, and part of the São Francisco Craton (Figure PT 1a). Due to their areal... ACCEPTED MANUSCRIPT 4 from Paraná Sedimentary basin in São Paulo State; (c) semi-arid climate: metamorphic (gneiss...Sorocaba River basin, located in the eastern part of São Paulo State, Brazil, is an ideal study area to assess |  | Inglis, Edward C., Moynier, Frédéric, Creech, John, Deng, Zhengbin, Day, James M.D., Teng, Fang-Zhen, Bizzarro, Martin, Jackson, Matthew, Savage, Paul (2019) Isotopic fractionation of zirconium during magmatic differentiation and the stable isotope composition of the silicate Earth. Geochimica et Cosmochimica Acta, 250. 311-323 doi:10.1016/j.gca.2019.02.010 | Journal (article/letter/editorial) | | to reflect crystallisation of isotopically light zircon Estimated primitive mantle 94/90ZrIPGP-Zr...Using a Rayleigh fractionation model, we suggest a zircon-melt of 0.9995 based on the whole rock 94/90ZrIPGP-Zr...depleted mantle source (N-MORB) or that underwent zircon saturation (SiO2 >65 wt%) are removed from the...from partial melt extraction in the mantle and by zircon fractionation in differentiated melts. Conversely...samples analysed here comprise: three samples from São Nicolou island of the Cape Verde archipelago (CVSN |  | | Journal (article/letter/editorial) | | plinian deposits of Agua de Pau volcano (Sao Miguel, Azores Islands) F. RIDOLFI1, A. RENZULLI1,*, P. SANTI1...fall deposits of Agua de Pau volcano (São Miguel, Azores Islands) are divisible into (1) silica-undersaturated...minerals, Agua de Pau, São Miguel, Azores. Introduction T HE Azores archipelago straddles the MidAtlantic...MidAtlantic Ridge and emerges from the Azores Platform, (37 – 40ºN and 25 – 31ºW) near the North American-African-Eurasian...triple plate junction (Burke and Wilson, 1976). São Miguel is one of the eastern islands and is located along |  | | Journal (article/letter/editorial) | | the Pernambuco-Alagoas Block in the north with the São Francisco Craton in the south, but the timing, duration...900 Ma, (iv) and a second passive margin on the São Francisco Craton. In the Canindé Domain, rifting...Convergence of the Pernambuco-Alagoas Block and the São Francisco Craton led to deformation on the passive...the continental margin sedimentary rocks onto the São Francisco Craton. Our results indicate that the construction...extrusion between the West African, Amazonian and São Francisco/Congo cratons at ca. 630–580 Ma (Caby et |  | Crósta, A.P., Reimold, W.U., Vasconcelos, M.A.R., Hauser, N., Oliveira, G.J.G., Maziviero, M.V., Góes, A.M. (2019) Impact cratering: The South American record—Part 2. Geochemistry, 79 (2) 191-220 doi:10.1016/j.chemer.2018.09.002 | Journal (article/letter/editorial) | | Federal University of Bahia, Brazil e University of São Paulo, Brazil b c ARTICLE INFO ABSTRACT Handling...case is the product of thermal decomposition of zircon to silica + ZrO2, as well as rare shocked quartz...apatite and zircon and obtained a mean age of 663 ± 90 ka after analysis of 22 apatite and 10 zircon grains...Brazil - within the southern outskirts of the city of São Paulo, and close to the Atlantic mountain range (Fig...mudstone related to the Resende Formation of the São Paulo Basin occurs in the southern inner and outer |  | | Journal (article/letter/editorial) | | 3). zircon (Figure 3). The phenocrysts alkali feldspars apatite, monazite, haleniusite, and zircon (Figure...apatite and zircon accessory minerals. and sodium amphibole, with small amounts of apatite and zircon as accessory...◦ 0 ◦ 0 ◦ 0 ◦ 0 ◦ 7 of 21 Azores, Kilombe, Kenya Portugal 0 112 55 47” 112 55 41”and112 57...12 0.08 0.09 0.05 0.01 0.09 0.24 0.22 Kilombe, Azores, MgO 0.14 0.28 0.27 0.17 0.32 0.10 0.21 0.09 0...0.73 0.62 0.77 0.17 0.11 0.52 0.59 1.10 Kenya Portugal Na2 O Lat.(N) 5.99 23°8′43′′ 5.89 5.94 6.19 23°9′10′′ |  | | Journal (article/letter/editorial) | | Basalt 5436 Basalt TBA36 Basalt 110B Nephelinite Azores (HIMU-EM2) SM0136⁎ Basalt SM0169 Basalt SM160501–4...contents are from: Rurutu: [29], Tubuai: [56], Azores: [33,75], Pitcairn: [74], Samoa: [76]. εHf values...Furnas, Nordeste and Fogo volcanoes on Sao Miguel of the Azores islands were also investigated and have...Society) tend to be lower than in EM-1 (Pitcairn) and Azores samples (Fig. 1b). Nb/Ta ratios in all OIB types...islands (16.3) than in EM2 (15.4) and EM1 (15.6; Azores: 15.8; Fig. 1). The variation of the Nb/Ta and |  | | Journal (article/letter/editorial) | | O-enriched supracrustal materials into the lower crust: Zircon record from the North China Craton Hong-Fu Zhang...April 2014 Available online 24 April 2014 Keywords: Zircon Oxygen isotope Archean lower crust Supracrustal...the Neoarchean lower crust indeed happened during zircon crystallization. Some zircons with core–rim texture...which is evidenced by the existence of detrital zircon of 4.4 Ga year old in metasediment from the Jack...represent Precambrian metamorphic terrain with zircon U–Pb ages of 3.8 Ga. Neoarchean-Paleoproterozoic |  | | Journal (article/letter/editorial) | | (238U/232Th) only when accessory phases such as apatite or zircon are involved, but no petrographic or geochemical...isotope composition of Pico Mountain lavas in the Azores (grey downward triangle, Prytulak and Elliott,...by recent unpublished data on lavas from São Miguel (Azores; J. Prytulak personal communication). In...Partial melting and upwelling rates beneath the Azores from a U-series perspective. Earth and Planetary...2007. The origin of enriched mantle beneath São Miguel, Azores. Geochimica et Cosmochimica Acta 71, 219–240 |  | Alvarenga, Carlos J.S., Santos, Roberto V., Vieira, Lucieth C., Lima, Barbara A.F., Mancini, Luis H. (2014) Meso-Neoproterozoic isotope stratigraphy on carbonates platforms in the Brasilia Belt of Brazil. Precambrian Research, 251. 164-180 doi:10.1016/j.precamres.2014.06.011 | Journal (article/letter/editorial) | | later deformed, along the eastern margin of the São Francisco Craton. These strata are divided into the...Although these rocks are folded near the edge of the São Francisco Craton, they are largely undeformed within...setting and stratigraphy The western edge of the São Francisco Craton (SFC) includes a succession of siliciclastic...from diagenetic xenotime overgrowth on detrital zircon (Matteini et al., 2012). The age of the Jequitaí...formation has a maximum age of 620 Ma based on detrital zircon U–Pb data (Rodrigues, 2008; Pimentel et al., 2011) |  | Macdonald, R., Bagiński, B., Leat, P.T., White, J.C., Dzierżanowski, P. (2011) Mineral stability in peralkaline silicic rocks: Information from trachytes of the Menengai volcano, Kenya. Lithos, 125 (1) 553-568 doi:10.1016/j.lithos.2011.03.011 | Journal (article/letter/editorial) | | settings, e.g. ocean islands such as Terceira, Azores (Self and Gunn, 1976) and Socorro Island, Mexico...with accessory magnetite, biotite, monazite and zircon (White et al., 2006). The biotite is nearly pure...(1990), Villari (1974), White et al. (2005, 2009); Azores, Schmincke and Weibel (1972), White et al. (1979);...modes among the peralkaline rhyolites of Terceira, Azores. The pantelleritic suite of Pico Alto evolved at...comenditic trachytes from the Azores (Graciosa, White et al., 1979; and São Miguel, Schmincke and Weibel, 1972) |
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Água de Pau Volcano, São Miguel, Azores, Portugal