Results 191 to 200 of about 542,668 (236)

Volcanic degassing along the enigmatic South Sandwich volcanic arc

2020
<p>The South Sandwich Islands (SSI) are a chain of active volcanoes in the Southern Ocean and remain one of the most remote and enigmatic island arcs on Earth. The relatively recent development of the SSI over the past 20 million years has been closely linked with the formation of the Drake Passage, making this one of the ...
Emma Liu, Kieran Wood, Alessandro Aiuppa, Gaetano Giudice, Marcello Bitetto, Tom Pering, Thomas Wilkes, Andrew McGonigle, Brendan McCormick Kilbride, Tobias Fischer, Scott Nowicki, Emily Mason, Tom Richardson, Tom Hart   +13 more
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Submarine arc volcanism in the southern Mariana Arc as an ophiolite analogue

Tectonophysics, 1989
Supra-subduction zone (SSZ) ophiolites are being recognized more and more frequently in the geologic record. Submarine volcanism in intra-oceanic arcs is one tectonic setting in which such ophiolites might form. The Southern Seamount Province of the Mariana Arc represents the best documented example of an active intra-oceanic submarine arc which can ...
Robert J Stern, Sherman H Bloomer, Ping-Nan Lin, N.Christian Smoot   +3 more
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Unraveling the diversity in arc volcanic eruption styles: Examples from the Aleutian volcanic arc, Alaska

Journal of Volcanology and Geothermal Research, 2016
Abstract The magmatic systems feeding arc volcanoes are complex, leading to a rich diversity in eruptive products and eruption styles. This review focuses on examples from the Aleutian subduction zone, encompassed within the state of Alaska, USA because it exhibits a rich diversity in arc structure and tectonics, sediment and volatile influx feeding ...
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Origin of felsic volcanism in the Izu arc intra-arc rift

Contributions to Mineralogy and Petrology, 2017
An intra-arc rift (IAR) is developed behind the volcanic front in the Izu arc, Japan. Bimodal volcanism, represented by basalt and rhyolite lavas and hydrothermal activity, is active in the IAR. The constituent minerals in the rhyolite lavas are mainly plagioclase and quartz, whereas mafic minerals are rare and are mainly orthopyroxene without any ...
Satoru Haraguchi, Jun-Ichi Kimura, Ryoko Senda, Koichiro Fujinaga, Kentaro Nakamura, Yutaro Takaya, Teruaki Ishii   +6 more
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Mineralization associated with volcanic arcs

1996
Abstract Volcariic arcs can be characterized by a spectrum of mineralization types, from epithermal vein deposits, genetically related to near-surface volcanogenic fracture systems, to higher temperature vein and dissemination deposits associated with epizonal plutons, which have intruded older volcanic and sedimentary formations ...
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Structural behaviour of a continental volcanic arc: the Mexican volcanic belt

1986
The structural evolution of S-Central Mexico during Neogene and Quaternary times clearly reveals the overlap of several tectonic phases characterized by brittle deformations. Structural lineaments linked with the southern prosecution of the Basin and Range Province were recognized, together with lineaments connected to the opening of the Gulf of ...
Pasquare, G, FORCELLA, FRANCO, TIBALDI, ALESSANDRO, Vezzoli, L, ZANCHI, ANDREA MARCO   +4 more
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Plate tectonics and volcanism in the gibraltar arc

Tectonophysics, 1974
Abstract Late Tertiary and Quaternary volcanism of southeastern Spain can be fitted in a platetectonics model, taking into account the post-Paleozoic evolution of the stable and semimobile Iberian areas and the new orogenic belts bordering the Mediterranean between Africa and the Iberian Peninsula.
Vicente Araña, Ramon Vegas
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Volcanic and tectonic evolution of the Cascade Volcanic Arc, central Oregon

Journal of Geophysical Research: Solid Earth, 1990
From 22 to 0 Ma, σ3 in the Cascade arc rotated clockwise from approximately N–S to E–W. σ1 rotated from subhorizontal to vertical at about 7 Ma, producing an extensional stress regime at 7–0 Ma. Rotation of σ1 and σ3 was likely a response to decreasing influence of ENE to NE compression at the Juan de Fuca plate‐North American plate (JDFP‐NAP) boundary
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Interacting Volcanic, Tectonic, and Submarine Geohazards in the Hellenic Volcanic Arc

The Hellenic Volcanic Arc (HVA) is one of the most geodynamically active regions in the Mediterranean, where crustal extension, magma migration, and active faulting interact to generate interconnected and cascading geohazards. These include earthquakes, explosive volcanic eruptions, caldera and flank collapses, submarine landslides, tsunamis, and ...
Paraskevi Nomikou, Danai Lampridou, Konstantina Bejelou, Kyriaki Drymoni, Anna Katsigera, Stavroula Kazana, Varvara Antoniou, Dimitrios Papanikolaou   +7 more
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Arc volcanism and rifting

Nature, 1989
Fujioka, Kantaro, Taylor, Brian, Janecek, Thomas, Aitchison, Jonathan, Cisowski, Stanley, Colella, Albina, Cooper, Patricia Ann, Dadey, Kathleen, Egeberg, Per, Firth, John, Gill, James B., Herman, Yvonne, Hiscott, Richard N., Isiminger-Kelso, MaLynn, Kaiho, Kunio, Klaus, Adam, Koyama, Masato, Lapierre, Henriette, Lovell, Michael, Marsaglia, Kathy, Nishimura, Akira, Pezard, Philippe, Rodolfo, Kelvin, Taylor, Rex Neil, Tazaki, Kazue, Torssander, Peter   +25 more
openaire   +3 more sources