 | | 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 |  | | 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...residual magmas. In contrast, the zircono-silicate dalyite, and REE-rich minerals (chevkinite-(Ce), britholite-(Ce)...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 |  | 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) | | Saturated Peralkaline Volcanics from Terceira, Azores Stephen Self* and Bernard M. Gunn Department of...volcanoes form Terceira, one of the islands of the Azores group; three contain both basaltic and peralkaline...Terceira is one of nine volcanic islands of the Azores archipelago, which trend obliquely across the Mid-Atlantic...picrite-alkali basalt-hawaiite-mugearite to trachyte. Sgo Miguel has comenditic trachytes (Schmincke and Weibel...is site of 1761 hawaiite eruption). Inset are Azores, mid-Atlantic rift (mar) and Terceira rift (TR) |  | | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | and pyroclastic deposits. Pyroclastic (scoria and pumice) deposits make up ~43% of the island’s total areal...and petrogenetically characterize the voluminous pumice deposits, trachyte domes, felsic lava flows, and...Ridge is composed primarily of trachyte flows and pumice, and some rhyolite and rhyolitic obsidian. The...is made up of massive, thick pyroclastic (mostly pumice) fall deposits with the southwestern flanks mostly...Monzonite xenoliths occur on Middleton Ridge in pumice deposits and syenite xenoliths occur in the mugearite |  | | Journal (article/letter/editorial) | | zirconium and certain other rare elements. In a pumice of pantellerite composition, for example, Fin'ko...12% in the pumice, and 0.11% in the glass from the pumice), zirconium (0.29% in the pumice, 0.26% in the...the glass) and niobium (0.05% in the pumice, 0.04% in the glass). Certain samples of agpaitic pumices... beryllium and rare earths (up to 0.12% in the pumice, according to Fin'ko, 1964), with a predominance...with the K/Rb ratio can also be observed in the pumice samples we V.1. KOVALENKO, ET AL. TABLE 1. Contents |  | | Journal (issue) | | Wales, Belgium, France, Germany, Holland, Italy, Portugal, Spain, Sweden, Switzerland, U.S.A. ASSAYERS... 180 • • • • • 181 • • • • • 183 Dalyite: a new Mineral from Ascension Island • • • ...Marshall's Hall, Jamaica • • . facing p. 117 Rio Grande Valley, near Comfort Castle • • • Plate III...western tributary of the Rio Grande (see Plate I). The wide valley of the Rio Grande separates the main Blue...which runs for 13 miles along the valley of the Rio Grande from Port Antonio to Comfort Castle and thence |  | | Book | | Di\ Y-site Dahllite ................... DALL-ite Dalyite ................... D,J.\Y-li-ite Damourite .....TIL-uh-lite Pulaskite .................. poo-LAS-kite Pumice ................... PUlVI-is Purnpellyite .... |  | | Book (volume) | | ec eae ae D. Southeastern Brazil . . . E. Rio Grande do Sul State, IV PEC One] Stor S oe. nue ee...its trace during sea-floor spreading by the Rio Grande rise and the Walvis ridge. While little support...appear to apply to it. The Walvis ridge and Rio Grande rise are not parts of a mid-ocean ridge system...mid-Atlantic ridge with the Walvis ridge and Rio Grande rise. Here a sudden and large change in sediment...and Crowell, 1968). On the Walvis ridge and Rio Grande rise the sedimentary cover is essentially the same |  | | Book (edition) | | Menzenschwand Scbwarzwald Mts., in the Sailauf quarry, Spessart Mts., Bavaria. both Germany, and from...dolerite on Monte Redondo, 160 km N of Lisbon, Portugal. Columnar aggregates in ultrabasic rocks at Smrcina...to Hot Springco., Arkansas, in the Point of Rock quarry, pearly. Clea,·age {001} perfect. {100} and {010}...mineral of alkaline rocks in the Point of Rocks quarry, Colfax co., New Mexico, with aegirine and arfvedsonite...several cm on prehnite in basalt in the Chantilly quarry, Loudoun co., Virginia. In metamorphic sulfide |  | Melluso, L., Morra, V., Guarino, V., de’ Gennaro, R., Franciosi, L., Grifa, C. (2014) The crystallization of shoshonitic to peralkaline trachyphonolitic magmas in a H2O–Cl–F-rich environment at Ischia (Italy), with implications for the feeder system of the Campania Plain volcanoes. Lithos, 210. 242-259 doi:10.1016/j.lithos.2014.10.002 | Journal (article/letter/editorial) | | crystallize in peralkaline magmas (e.g., astrophyllite, dalyite, wadeite), and eudialyte is absent, despite the...(possibly some of the Mercato and Avellino phonolitic pumice; cf. dataset of Santacroce et al., 2008; Supplementary...the Cenozoic potassic alkaline complex of Morro de São João, southeastern Brazil. Journal of South American |  | | Book (edition) | | Northampton co., Pennsylvania, and from the Kobokobo quarry, near Kamituga, Dern. Rep. of Congo. EJM 23, 269-277...thaleniteM crystals from the NYF-pegmatite at Askagen quarry, Viirmland, Sweden, in tiny metamict crystals to...fluorapatite in a phosphate zone in the Penrice marble quarry, Angaston, near Adelaide, South Australia. MM 72...chemovite-(Y) in Mn- etc. in NYF pegmatite in the Stetind quarry, Tysfjord, rich nodules in metasediments from the...205-217 2008. zwald Mts., Germany, and at Mina Grande, Coquimbo Barahonaite-(Fe) (Ca.Cu.Na,Fe3- .Al}1~Fe |  | | Book (volume) | | Surface Gevlosy B. Islands: Petrochemistry Azores and D. J. MacFarlane 5 5 . IV. Geophysics...Gravity D. Seismology E. Heat Flow V. Origin of the Azores ; ; A. The Model and Some Testing ‘ Mra B. Speculations...Gibraltar. While there is little evidence of the Azores—Gibraltar fracture zone, the effects in the...(1971). It is possible that detailed study along the Azores-Gibraltar fracture zone will show evidence of adjustment...dans le Golfe de Gascogne: Bull. Ass. Fr. Etude Grande Prof. Océan, n. 5, p. 11-20. Berthois, L. and Brenot |  | | Book | | Zirconium Silicates 6.13 . 1. Wadeite 6.13.2. Dalyite Apatite 6.14.1. Paragenesis 6.14.2. Composition...mined the lamproites from the Zirkel Mesa quarry until 1920. Pumice and cinders from Zirkel Mesa cones have...The glassy lamproite has been mined from a small quarry at the main intrusion for use as road metal. 3...San Miguel (1935, 1936); Burri and Parga Pondal (1937); San Miguel and de Pedro (1945); San Miguel et...300-m-long by 100-m-wide "swell" at the Smoky Butte Quarry. Here, a shallow "intrusive" is comprised of vitric |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | °Pernambuco SRR Piaui E : Rio de Janeiro Rio Grande Norte Rio Grande Sul AG AL AP AM BA CE PA Ee PE PI RJ...distributed in Cu-Se deposits. Cougar mine, San Miguel Co., CO; Kidd Creek mine, near Timmins, ON, and...an accessory mineral in serpentinite. Cedar Hill quarry, Lancaster Co., PA; Josephine Co., OR; White Creek...1 (540 nm). Chaméane, Puy-de-Déme, France; San Miguel mine, Moctezuma, SON, Mexico.pm TMPM 29:151(1982)...in meteorites and lunar rocks. Howard Montgomery quarry, Howard Co., MD; Mackinaw mine, Snohomish Co., |  | | Report (issue) | | cessation of magma supply. For example, in the Rio Grande Rift, such magmatism took place over a less than...Jurassic Mexican Borderland rift and the Cenozoic Rio Grande rift: Geology, v. 27, p. 779-782, doi: 10.1130...Institute of Turkey, no. 117, 68 p. regions in the Rio Grande Rift, southern New Mexico: Geological Society of...exceeds 400 m in thickness. It consists of thick pumice flow units from at least two large explosive eruptions...breccia lithic deposits are present in numerous pumice flow units. Lithics are mainly granodiorite clasts |  | | Report (issue) | | Lapilli tuff Tuff Ash Welded tuff Silicified tuff Pumice 12 IGNEOUS ROCKS COL. (i) : 1 d . page 1 ....lamprophyric tuff Silicified carbonatitic tuff PUMICE ( l J HO ) Code 4th colum n as for Silicified...trachyte , undifferentiated Pulaskite .. .. •. • • • • Pumice, undifferentiated 95 • • • • • • • • • • • •...lDBE l BB O lABL lABK lDBO l DD O lCAD lJfIO Pumice, cont . , Andesitic • • , Basaltic • • , Carbonatitic...pidine 4 • I I • I I I ' Dachiardite Dalyite Danalite Danburite Daphnite · Darapskite Datolite |  | | Journal (article/letter/editorial) | | evolution of fluid inclusions in the aegirine--dalyite granite (0.15% F) of Ascension Island shows similarities...silica content and alkalinity and in ash flows, pumice and lava erupted on land or under water remain |  | | Book (volume) | | Strontioginorite (Sr,Ca)2B14O23·8H2O Locality: Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz, Thuringia...NaBe(CO3)(OH)·2H2O Locality: Poudrette (Demix) quarry, Mont Saint-Hilaire, Rouville RCM (Rouville Co...C18 Brenkite Ca2(CO3)F2 Locality: Schellkopf quarry, near Brenk, Eifel region, Germany (type locality)...Weloganite Sr3Na2Zr(CO3)6·3H2O Locality: Francon quarry, Saint-Michel, Montréal, Québec, Canada (type...mine, Sobral da Adiça, Moura, Beja district, Portugal. Description: Light grey, massive. Identified |  | | Report (volume) | | of magmatic bimodality lies on Graciosa in the Azores. Here there have been alternating eruptions of...dangerous generalization, even for the oceans, e.g. Azores and Canaries. On the continents it is probably...volcanism in the Azores, it is appropriate to conclude by pointing out that the Azores constitute an excellent...notably those lying along the Terceira rift: Sao Miguel, Terceira and Graciosa. On these three islands...focus for the release of volatiles through the Azores lithosphere. ACKNOWLEDGMENTS: My appreciation of |  | | Book (edition) | | the floor of the 910 foot level of the Commercial Quarry, Crestmore, California, associated with quartz...Rowan County, North Carolina; at the Chantilly quarry, near Arcola, Virginia; Cochise, Gila, and Pima...found in the tin-tungsten veins of Panasqueira, Portugal, with thadeuite. 18 ALTMARKITE SELECTED REFERENCES:... and other minerals; also found at a dolomite quarry near Bergisch-Gladbach, Germany; Osaka Prefecture...cite and quartz masses, at the Keystone Trappe quarry, Cornog, Chester County, Pennsylvania. Dana’s SELECTED | | | Book (edition) | | the floor of the 910 foot level of the Commercial Quarry, Crestn1ore, California, associated with quartz...Rowan County, North Carolina; at the Chantilly quarry, near Areola, Virginia; Cochise, Gila, and Pima...found in the tin-tungsten veins of Panasqueira, Portugal, with thadeuite. 18 AL TMARKITE SELECTED REFERENCES:...malachite, and other minerals; also found at a dolomite quarry near Bergisch-Gladbach, Germany; Osaka Prefecture...and quartz masses, at the Keystone Trappe Rock quarry, Cornog, Chester County, Pennsylvania. SELECTED |
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