ARQ - SCN - N 03 (1982)

Artigos publicados no Número 3 - 1982

CONTEÚDO / CONTENTS:

NOTA DE ABERTURA
Este 3.º número da Série Ciências da Natureza foi exclusivamente destinado aos Proceedings do Simpósio sobre a Actividade de Vulcões Oceânicos que se realizaram nos Açores em Agosto de 1980.
As sessões realizaram-se nas instalações da Universidade dos Açores, em Ponta Delgada, e esta publicação é mais uma colaboração que a Universidade dos Açores dá ao referido Simpósio / J. Ávila Martins, Vasco Garcia

MACHADO, Frederico - Preface. (pp. 11-12)

INTERNATIONAL SYMPOSIUM - On the Activity of Oceanic Volcanoes. (pp. 13-15)

LIST OF PARTICIPANTES (pp. 17-26)

OPENING SESSION

BRYAN, Wilfred B. - Mt. St. Helens, Washington: initial eruptive events and morphologic changes. (pp. 29-36)

SECTION 1 (and 3) - Submarine rift eruptions and oceanic island activity - Convenor: H.-U. SCHMINCKE (University of Bochum, Germany)

CANAS, José A. - Motion of the plates as function of the low-q zones beneath spreading centers. (p. 39)

AVDEIKO, G. P. - Scales of recent submarine volcanism. (pp. 41-42)

URRUTIA-FUCUGAUCHI, J. - Magnetic properties of some tholeiitic basalts dredged from the Gulf of California, Mexico. (pp. 43-44)

TRYGGVASON, EYSTEINN - Observed ground deformation during the Krafla Eruption of March 16, 1980. (pp. 45-56)

BRANDSDÓTTIR, Bryndís; EINARSSON, Páll - Seismic activity and rifting in the Krafla fault swarm in NE-iceland. (pp. 57-58)

NAKAMURA, Kazuaki - Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments. (pp. 59-73)

STAUDIGEL, S.; SCHMINCKE, H.-U. - Submarine pyroclastic rocks of the La Palma ‘Ophiolite’ complex. (pp. 75-76)

CAMUS, Guy - Le Capelinhos (Faial, Açores) vingt ans après son eruption : le modele eruptif ‘Surtseyen’ et les anneaux de tufs hyaloclastiques. (pp. 77-81)

HERNANDEZ-PACHECO, Alfredo; VALLS, M. C. - The historic eruptions of La Palma Island (Canaries). (pp. 83-94)

MACHADO, Frederico - Interpretation of ground deformation in the Azores. (pp. 95-112)

SELF, Stephen - The ignimbrites of Terceira, Azores. (pp. 113-114)

PRESTVIK, Tore - The geology, volcanic activity, and age of Bouvetøya, South Atlantic. (pp. 115-123)

BILIK, István - Lower cretaceous submarine rift volcanism in the Southern Transdanubia in Hungary. (pp. 125-126)

FEDOTOV, S. A.; BALESTA, S. T.; GORELCHIK, V. I.; FLEROV, G. B.; ENMAN, V. B. - The large Tolbachik fissure eruption in 1975-1976, Kamchatka. (pp. 127-128)

BELL, J. D.; ATKINS, F. B.; HARRIS, C. - A provisional, geological map of ascension island, South Atlantic.> (p. 129)

SECTION 2 - Petrology and geochemistry of oceanic volcanoes - Convenor: P. E. BAKER (University of Nottingham, United Kingdom)

SCHMINCKE, H.-U.; STAUDIGEL, H.; BREY, G. - Mantle heterogeneity in the North Atlantic : evidence from oceanic islands. (pp. 133-134)

BRYAN, Wilfred B. - Fractionation, partial melting, and mixing in normal basalts from 22 ̴25˚ N, mid-atlantic ridge. (pp. 135-144)

FERNANDEZ, Louis A. - The petrology and geochemistry of the Nordeste volcanic complex, São Miguel, Azores. (pp. 145-158)

MARRINER, Giselle Frances; NORRY, M. J.; GIBSON, I. L. - The petrology and geochemistry of the Água de Pau Volcano, São Miguel, Azores. (pp. 159-173)

STOREY, Michael - Petrogenesis of the recent trachytic pyroclastic succession of Água de Pau Volcano, (São Miguel, Azores). (pp. 175-176)

ARNEY, Barbara - Geochemistry of Eyjafjöll, a volcano in southern Iceland. (pp. 177-178)

JØRGENSEN, Karl A. - Magma mixing and hybridism : a preliminary study from southern Iceland. (pp. 179-194)

GRÖNVOLD, Karl - Krafla lavas 1975-1980 : chemical variation. (pp. 195-196)

SIGVALDASON, Gudmundur E.; OSKARSSON, Niels - Fluorine in volcanic rocks of Iceland. (p. 197-)

FLOWER, Martin F. J. - Magma mixing at oceanic transform fracture zones. (pp. 199-200)

BATIZA, Rodey; O’Hearn, T. - Major element chemistry of basalt glasses dredged from young isolated volcanoes and the East Pacific rise, 10˚ ̴14˚ N. (pp. 201-231)

WOLFF, John A. - Heterogeneity of phonolitic pumice deposits from Tenerife, Canary Islands. (pp. 231-232)

HARRIS, Chris; BELL, J. D.; ATKINS, F. B. - Coarse-Grained rocks from Ascension Island. (pp. 233-246)

MITCHELL-THOME, Raoul C. - On occurrence of vitrophyres in Macaronesia. (pp. 247-248)

FLOWER, Martin F. J. - Plagioclase accumulation and phenocryst reaction in oceanic tholeiite : an indication of spreading rate. (pp.249-250)

KUBOVICS, Imre - Genesis of ultrabasic-basic rocks (‘Ophiolites’) of north Hungary. (pp. 251-252)

ARAMAKI, Shigeo - Submarine volcanoes East and South of Izu Peninsula, Central Japan. (pp. 253-254)

BAKER, P. E.; KEYVAN-SCOCOUHI, F. A. - Petrology and geochemistry of the Juan Fernandez Islands, South East Pacific. (pp. 255-264)

SECTION 4 - Geothermal power development in oceanic areas - Convenor: V. H. FORJAZ (University of Lisbon, Portugal)

ANDLAUER, Gerard - Projet de saline a Ribeira Grande. (p. 267)

FILIPPO, M., TORO, B. - Gravity residual anomalies and geothermics in Latium region (Central Italy). (pp. 269-270)

GORSHKOV, A. P.; GAVRILENKO, G. M.; SELIVERSTOV, N. I.; SCRIPKO, K. A. - Geologic structure and fumarolic activity of the Esmeralda submarine volcano. (pp. 271-298)

CATALDI, R.; FERRARA, G. C.; FUNICELLO, R.; LOVARI, F. - A new case history of geothermal exploration in volcanic areas : the latera field (Northern Latium, Italy). (pp. 299-300)

BENCINI, A.; MARTINI, M.; PICCARDI, G. - New investigations on thermal manifestations of S. Miguel (Azores). (pp. 301-312)

EXCURSION GUIDES FOR THE FIELDS TRIPS

MARTINS, J. Ávila - Excursion guide for field trip V1 : ‘Island of São Miguel’. (pp. 315-328)

SELF, Stephen - Excursion guide for field trip V2 : ‘Island of Terceira’. (pp. 329-342)

MACHADO, Frederico - Excursion guide for field trip V3 : ‘Islands of Fayal and Pico’. (pp. 343-349)