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Gustavo W. Bertotto, Maurizio Mazzucchelli, Tommaso Giovanardi, Rommulo V. Conceiçao, Alberto Zanetti, Manuel E. Schilling, Mauro I. Bernardi, Alexis D. Ponce, Tiago Jalowitzki, Fernanda Gervasoni and Anna Cipriani
Huanul is a shield volcano with several lava flows hosting mantle xenoliths erupted during the Pleistocene (0.84 ± 0.05 Ma). It is located in the southern part of the Payenia Volcanic Province, which is among the largest Neogene-Quaternary volcanic provi...
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Michael W. Förster, Yannick Bussweiler, Dejan Prelevic, Nathan R. Daczko, Stephan Buhre, Regina Mertz-Kraus and Stephen F. Foley
Subduction of oceanic crust buries an average thickness of 300?500 m of sediment that eventually dehydrates or partially melts. Progressive release of fluid/melt metasomatizes the fore-arc mantle, forming serpentinite at low temperatures and phlogopite-b...
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Leander Schmidt, Klaus Schricker, Jean Pierre Bergmann and Christina Junger
Spatter formation is a major issue in deep penetration welding with solid-state lasers at high welding speeds above 8 m/min. In order to limit spatter formation, the use of local gas flows represents a technically feasible solution. By using the gas flow...
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Christine McCarthy, Michael A. Nielson, Allie N. Coonin, Jessica Shea Minker and Armando A. Domingos
We measured the ultrasonic properties and microstructure of two-phase binary mixtures of the ice?ammonia partial melt system, which was selected based on its importance for numerous planetary bodies. The equilibrium microstructure of ice?ammonia melt was...
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Ikuya Nishio, Tomoaki Morishita, Kristofer Szilas, Graham Pearson, Ken-Ichiro Tani, Akihiro Tamura, Yumiko Harigane and Juan Miguel Guotana
A titanian clinohumite-bearing dunite was recently found in the Ulamertoq ultramafic body within the 3.0 Ga Akia Terrane of southern West Greenland. Titanian clinohumite occurs as disseminated and discrete grains. Titanian clinohumite contains relatively...
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Samanta Serra-Varela,Pablo D. González,Raúl E. Giacosa,Nemesio Heredia,David Pedreira,Fidel Martín-González,Ana María Sato
Pág. 102 - 130
In San Martín de los Andes area (Argentinian Patagonia) the Palaeozoic basement consists of metamorphic and plutonic rocks. The metamorphic rocks include strongly deformed schists, gneisses and migmatites. Their geochemical and petrographic characteristi...
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Vincent Van Hinsberg, Catherine Crotty, Stan Roozen, Kristoffer Szilas and Alexander Kisters
The Tartoq greenstone belt of southwest Greenland represents a well-preserved section through >3 Ga old oceanic crust and has the potential to provide important constraints on the composition and geodynamics of the Archaean crust. Based on a detailed ...
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Gary S. Michelfelder, Todd C. Feeley, Alicia D. Wilder and Erik W. Klemetti
To better understand the origin of across-strike K2O enrichments in silicic volcanic rocks from the Andean Central Volcanic Zone, we compare geochemical data for Quaternary volcanic rocks erupted from three well-characterized composite volcanoes situated...
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Roberto Cesare Callarotti
We model the low frequency electrical heating of submarine methane hydrate deposits located at depths between 1000 and 1500 m, and determine the energy return on energy invested (EROI) for this process. By means of the enthalpy method, we calculate the t...
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Rolf Kilian,Ernst Hegner,Steven Fortier,Muharrem Satir
Pág. 203 - 218
ABSTRACT. Miocene to Holocene volcanic rocks of Chimborazo and associated volcanoes in the Western Cordillera of Ecuador range in composition from basaltic andesite to rhyolite. They were erupted through Cretaceous accretionary mafic basement. Three calk...
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