 | | Report (volume) | | Three Late Quaternary Stratovolcanoes on Sao Miguel, Azores U.S. GEOLOGICAL SURVEY BULLETIN 1900 Prepared...cooperation with the Regional Government of the Azores AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL...Three Late Quaternary Stratovolcanoes on Sao Miguel, Azores By RICHARD B. MOORE Prepared in cooperation...cooperation with the Regional Government of the Azores U.S. GEOLOGICAL SURVEY BULLETIN 1900 U.S. DEPARTMENT...three late Quaternary stratovolcanoes on Sao Miguel, Azores I by Richard B. Moore. p. em. (U.S. Geological |  | 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...multicollector mass spectrometry were performed on pumice lapilli and volcanic glass separates from Fogo...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 |  | 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...ubiquitous clinopyroxene antecrysts in the UFG pumice falls, provide evidence for mingling/mixing processes |  | | Journal (article/letter/editorial) | | of a chemically zoned trachyte: Fogo A, Sao Miguel, Azores E. Widom 1 *, H.-U. Schmincke 2, and J.B. GilP...paths. Major and trace element variations in 25 pumice samples collected from throughout the stratigraphic...Fig. 1. Locality map of the Azores platform with the island of Sao Miguel. The inset is a more detailed...detailed drawing of Sao Miguel showing the location of Agua de Pao volcano H i l d r e t h 1983 ; W 6 r n...setting The island of Sao Miguel lies near the eastern extent of the Azores platform, a topographic high |  | | 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) | | Magmatic Activity in Agua de Pao Volcano, Sao Miguel, Azores by E. WIDOM 1 *, J. B. GILL 1 , AND H.-U. SCHMINCKE...trachyte eruptions of Agua de Pao volcano, Sao Miguel, Azores, represent bulk liquid compositions resembling...trachyte eruptions of Agua de Pao volcano (Sao Miguel, Azores) also appear to represent MAGMAT1C ACTIVITY...velocities of residual melt. The Azores island group emerges from the Azores Platform, a topographic high...(Laughton & Whitmarsh, 1974). The island of Sao Miguel belongs to the eastern island group, and straddles |  | | Journal (article/letter/editorial) | | Pyroclastics from Agua de Pau Volcano, Sao Miguel, Azores: Evolution of a Magma Body over 4,000 Years...England Abstract. The Recent stratigraphy of Sao Miguel records large numbers of trachytic pyroclastic...one of the three active stratovolcanoes on Sao Miguel. A geochemical and electron microprobe study made...succession, revealed significant variations in pumice clast chemistry and mineralogy between the individual...deposit. It is proposed that the five air fall pumice deposits represent successive samples of an evolving |  | Noll Filho, Roberto J., Sommer, Carlos A., Lima, Evandro F., Philipp, Ruy P., Basei, Miguel A.S. (2019) High‐silica Ediacaran volcanism in the Dom Feliciano Belt, southernmost Brazil. Geological Journal, 54 (3) 1413-1434 doi:10.1002/gj.3239 | Journal (article/letter/editorial) | | Evandro F. de Lima2 | Ruy P. Philipp2 | 3 Miguel A.S. Basei 1 Programa de Pós‐Graduação em Geociências...Geocronologia (CPGEO), Instituto de Geociências, USP, São Paulo, Brazil Correspondence Roberto J. Noll Filho...noll.robertoj@gmail.com Funding information Rio Grande do Sul State Research Foundation (FAPERGS), Grant/Award...HREE and has a strong negative Eu anomaly. U–Pb zircon dating indicates an age of 561 ± 2 Ma for Cerro...= Sierra Ballena, 9 = Cerro Amaro, 10 = Arroio Grande. Source: Philipp, Jelinek, and Chemale Jr (2012) |  | | Journal (article/letter/editorial) | | underlying Tenerife (Canary Islands), Sao Miguel and Faial (Azores), and Vesuvius. The most fractionated...system is heavy-REE depleted roofwards, while the Azores systems, which lack these phases, display roofward...Walker & Croasdale (1971, and unpub. data) on the Azores Islands. We now describe the general features of...1980), the units studied are subplinian to plinian pumice fall deposits and ignimbrites, some with associated...Las Canadas is the source of a late Quaternary pumice succession comprising some 40 airfall and ignimbrite |  | de Almeida, Delia del Pilar M., Conceição, Rommulo V., Chemale, Farid, Koester, Edinei, de Borba, André W., Petry, Karla (2005) Evolution of Heterogeneous Mantle in the Acampamento Velho and Rodeio Velho Volcanic Events, Camaquã Basin, Southern Brazil. Gondwana Research, 8 (4) 479-492 doi:10.1016/s1342-937x(05)71150-3 | Journal (article/letter/editorial) | | Sinos (UNISINOS), Av. Unisinos, 950 Cristo Rei, São Leopoldo, CEP 93022-000, RS, Brazil 2 Laboratório...Camaquã Basin are located in south-central Rio Grande do Sul State, southern Brazil. They are part of...phylossilicates in a matrix composed of shards and pumice, with eutaxitic texture, concoidal and perlitic...= 0.71454). Chemale Jr. (2000) obtained a U/Pb zircon age of 573±18 Ma, εNd (t=570 Ma) of –9.34 and –9...et al. (2003) used SHRIMP U/Pb dating in eleven zircon crystals from rhyolites of the Vila Nova do Sul |  | Sommer, Carlos Augusto, De Lima, Evandro Fernandes, Nardi, Lauro Valentim Stoll, De Liz, Joaquim Daniel, Waichel, Breno LeitãO (2005) Neoproterozoic, Mildly Alkaline, Bimodal Volcanism in Southern Brazil: Geological and Geochemical Aspects. International Geology Review, 47 (10) 1090-1110 doi:10.2747/0020-6814.47.10.1090 | Journal (article/letter/editorial) | | LeitãO Waichel a b Universidade Federal do Rio Grande do Sul b Universidade Estadual do Oest do Paraná...Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Cx. Postal...Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Cx. Postal...Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Cx. Postal...Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Cx. Postal |  | | Book | | Regional Geology Reviews Siegfried Siegesmund Miguel Angelo Stipp Basei Pedro Oyhantçabal Sebastian...springer.com/series/8643 Siegfried Siegesmund Miguel Angelo Stipp Basei Pedro Oyhantçabal Sebastian...Göttingen Germany Miguel Angelo Stipp Basei Geosciences Institute University of São Paulo São Paulo Brazil...Uruguay. These metasediments, based on the detrital zircon ages pattern and geological similarities are considered...Damara and Gariep belts of southern Africa with the Ribeira Belt of South America, and to interpret their evolution |  | Rosa, Diogo R.N., Inverno, Carlos M.C., Oliveira, Vítor M.J., Rosa, Carlos J.P. (2006) Geochemistry and geothermometry of volcanic rocks from Serra Branca, Iberian Pyrite Belt, Portugal. Gondwana Research, 10 (3) 328-339 doi:10.1016/j.gr.2006.03.008 | Journal (article/letter/editorial) | | rocks from Serra Branca, Iberian Pyrite Belt, Portugal Diogo R.N. Rosa a,b,c,⁎, Carlos M.C. Inverno a...Estrada da Portela, Alfragide, 2720-866 Amadora, Portugal CREMINER-Centro de Recursos Minerais, Mineralogia...Cristalografia, Edíficio C6, Piso 3, 1749-016 Lisboa, Portugal c Department Geology, University of Lisbon, Edifício...Lisboa, Portugal d INETI-Serviços Geológicos, Rua Frei Amador Arrais, 39, 7802-491 Beja, Portugal e CODES-Center...rocks from Serra Branca, Iberian Pyrite Belt, Portugal, consist of calc-alkaline felsic and intermediate |  | | Journal (article/letter/editorial) | | Geochemical Strategies, Inc., 2670 Appaloosa Way, Arroyo Grande, CA 93420, USA (rhaddad@charter.net) The application...do Porto, Praça Gomes Teixeira, 4099-002 Porto, Portugal (adoria@fc.up.pt) A 270-year ice core record...(canderso@uchicago.edu) New isotopic measurements of zircon and feldspar constrain the magmatic evolution at...range of pumice types from at least two migrating vent systems with syndeposition of plinian pumice falls...1) The earliest deposited pumice was plausibly the earliest erupted pumice and it probably derived from |  | | Journal (article/letter/editorial) | | Volatile Component of Some Pumice-Forming Alkaline Magmas from the Azores and Canary Islands and M. Storey...alkaline pumice deposits, of airfall and ignimbrite type, from Tenerife (Canary Islands), Sao Miguel and Faial...Faial (Azores). It is argued that reliable temperature and f O z estimates can be obtained from tita...particular interest are the volatile contents of pumice-forming magmas, since their very formation is testimony...determined from information preserved in the final pumice deposit. The most satisfactory method is to analyse |  | | 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′′ |  | | Report (chapter) | | hybrid lavas from Agua de Pau volcano, Sao Miguel, Azores M. Storey, J. A. Wolff, M. J. Norry & G. F...F. Marriner SUMMARY: The island of Sao Miguel in the Azores exhibits bimodal volcanism: eruptives from...fluid pressure may act as a 'trigger' for explosive pumice-forming eruptions (Sparks et al. 1977). Experiments...Blake & Campbell 1986). The island of Sao Miguel in the Azores (Fig. 1) contains an example of this bimodal...volcanological problems. The volcanology of Sao Miguel was the subject of a detailed study by Booth et |  | Guadagnin, Felipe, Chemale, Farid, Magalhães, Antônio J.C., Santana, Ana, Dussin, Ivo, Takehara, Lucy (2015) Age constraints on crystal-tuff from the Espinhaço Supergroup — Insight into the Paleoproterozoic to Mesoproterozoic intracratonic basin cycles of the Congo–São Francisco Craton. Gondwana Research, 27 (1) 363-376 doi:10.1016/j.gr.2013.10.009 | Journal (article/letter/editorial) | | Mesoproterozoic intracratonic basin cycles of the Congo–São Francisco Craton Felipe Guadagnin a,b,⁎, Farid Chemale...Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970 Porto...Keywords: Espinhaço Supergroup Congo–São Francisco Craton U–Pb and Lu–Hf zircon dating Precambrian intracratonic...t The U–Pb data from the volcanic and detrital zircon grains of the Tombador Formation in Chapada Diamantina...of the Chapada Diamantina region. The available zircon data defined three first-order intracratonic basinal |  | Oliveira, J. T., Rosa, C. J. P., Pereira, Z., Rosa, D. R. N., Matos, J. X., Inverno, C. M. C., Andersen, T. (2013) Geology of the Rosário–Neves Corvo antiform, Iberian Pyrite Belt, Portugal: new insights from physical volcanology, palynostratigraphy and isotope geochronology studies. Mineralium Deposita, 48 (6) 749-766 doi:10.1007/s00126-012-0453-0 | Journal (article/letter/editorial) | | Rosário–Neves Corvo antiform, Iberian Pyrite Belt, Portugal: new insights from physical volcanology, palynostratigraphy...shales with siliceous lenses and nodules, and the Ribeira de Cobres Formation of the Volcanic Sedimentary...siltstones and fine volcaniclastic rocks. Based on zircon U–Pb isotope dating, five discrete felsic magmatic...Zambujal Apartado, 7586 Alfragide, 2610-999 Amadora, Portugal J. T. Oliveira e-mail: tomas.oliveira@lneg.pt...LNEG Rua da Amieira, 4465-965 S. Mamede Infesta, Portugal e-mail: zelia.pereira@lneg.pt D. R. N. Rosa Dept |  | Larrea, Patricia, Galé, Carlos, Ubide, Teresa, Widom, Elisabeth, Lago, Marceliano, França, Zilda (2014) Magmatic Evolution of Graciosa (Azores, Portugal) Journal of Petrology, 55 (11) 2125-2154 doi:10.1093/petrology/egu052 | Journal (article/letter/editorial) | | 1093/petrology/egu052 Magmatic Evolution of Graciosa (Azores, Portugal) PATRICIA LARREA1,2*, CARLOS GALE¤1, TERESA... GEOSCIENCES DEPARTMENT, AZORES UNIVERSITY, SA‹O MIGUEL, 9501-801, PORTUGAL OBSERVATO¤RIO VULCANOLO¤GICO...GEOTE¤RMICO DOS ACORES, 9560 ATALHADA, SA‹O MIGUEL, PORTUGAL 5 RECEIVED JULY 9, 2013; ACCEPTED SEPTEMBER...located to the east of the Mid-Atlantic Ridge, in the Azores archipelago.The three volcanic complexes recognized...subalkaline gabbros, found for the first time in the Azores, appears to be related to fractionation of highly |  | Cordeiro, Pedro Filipe de Oliveira, de Oliveira, Claudinei Gouveia, Giustina, Maria Emília Schutesky Della, Dantas, Elton Luis, dos Santos, Roberto Ventura (2014) The Paleoproterozoic Campinorte Arc: Tectonic evolution of a Central Brazil pre-Columbia orogeny. Precambrian Research, 251. 49-61 doi:10.1016/j.precamres.2014.06.002 | Journal (article/letter/editorial) | | Keywords: Paleoproterozoic Accretionary orogeny São Francisco Craton Tocantins Province Campinorte Arc...terranes and, along with similar arcs within and at the São Francisco Craton edges, indicate a continental crust...basement is in tandem with coeval arcs in neighboring São Francisco and Amazonian cratons (Rosa-Costa et al...the Ribeira Belt (Heilbron et al., 2010), Araguaia Belt basement (Gorayeb et al., 2000) and São Luis...orogeny in China (Wu et al., 2008). These coeval São Francisco Craton orogens point to a widespread arc |  | | Report (volume) | | value to additional exploration in this part of Portugal and to future work in similar climatological and...consistently from the bottom to the top. Trace amounts of zircon, apatite, chevkinite, and allanite are also present...nonwelded vitric pumice blocks. Samples of basalts, andesites, dacites, and rhyolites included pumice, obsidian...crystallized rocks. Kfeldspar separates were made from pumice fragments in the Bandelier Tuff and from Proterozoic...and intra-Bandelier basaltic andesites in the Rio Grande gorge (Doe and others, 1969) overlap the Pb isotopic |  | Koch, Simone, Winkler, Wilfried, Von Quadt, Albrecht, Ulmer, Peter (2015) Paleocene and Early Eocene volcanic ash layers in the Schlieren Flysch, Switzerland: U–Pb dating and Hf-isotopes of zircons, pumice geochemistry and origin. Lithos, 236. 324-337 doi:10.1016/j.lithos.2015.07.008 | Journal (article/letter/editorial) | | Switzerland: U–Pb dating and Hf-isotopes of zircons, pumice geochemistry and origin Simone Koch a,⁎, Wilfried...acidic volcanic sources. U/Pb dating of single zircon crystals of a Paleocene layer (WW1948) by LA-ICP-MS...minimal durations of zircon crystallization of 350 ka. Hf-isotope analysis of the same zircon crystals reveals...source magma. The geochemical composition of the pumice grains of all bentonite layers is strongly affected...which is separately evaluated on bulk rock and pumice grain S. Koch et al. / Lithos 236–237 (2015) |  | | Journal (article/letter/editorial) | | parautochthonous Variscan metasediments (Northern Portugal). Implications of metamorphism and metassomatism...Porto, Rua do Campo Alegre,687, 4169 - 007 Porto, Portugal (rramos@fc.up.pt; maribeir@fc.up.pt) The studied...Galiza Trás-os-Montes Zone (ZGTM), in Northern Portugal Variscan belt. The studied area involve two geographic...Geological Survey, UK, (vicky@mvo.ms) 2 Phonolite pumice found floating offshore of Tristan da Cunha following...voluminous Toba rhyolite. The advent of the Ti-in-zircon geothermometer (Watson and Harrison, 2005) will |  | Wolff, J.A., Ellis, B.S., Ramos, F.C., Starkel, W.A., Boroughs, S., Olin, P.H., Bachmann, O. (2015) Remelting of cumulates as a process for producing chemical zoning in silicic tuffs: A comparison of cool, wet and hot, dry rhyolitic magma systems. Lithos, 236. 275-286 doi:10.1016/j.lithos.2015.09.002 | Journal (article/letter/editorial) | | phases such as allanite, chevkinite, titanite and zircon are dependent on melt compositional and structural...pyroclastic units, compositions are those of single whole pumice clasts, or an average of several clasts. In the...and three smaller alkaline units. All consist of pumice fallout deposits and ignimbrites; fallout volumetrically...amphibole, all = allanite, chev = chevkinite, zirc = zircon, tt = titanite, ap = apatite-group minerals, mt...accessory mafic phases. All additionally contain zircon and at least one REE mineral as an accessory: allanite |
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Pumice quarry, Ribeira Grande, São Miguel, Azores, Portugal