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Now showing items 17571-17590 of 40116
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(2001)The global flux of nitrogen from subduction zones is estimated by the elemental and isotopic compositions of nitrogen, argon and helium observed in volcanic gases and hydrothermal fluids in island arcs and in back-arc basin ...
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(2002)This paper proposes that gradual changes in the composition of volatiles that have been added to the atmosphere-ocean system are responsible for the Great Oxidation Event (G.O.E.) ca. 2.3 Ga. Before ca. 2.3 Ga, the composition ...
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(1987)Major slope failures are a significant degradational process at volcanoes. Slope failures and associated explosive eruptions have resulted in more than 20 000 fatalities in the past 400 years; the historic record provides ...
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(2003)We address volcanic hazards in the region of the Armenian Nuclear Power Plant and discuss the assessment of these hazards conducted in the framework of the International Atomic Energy Agency (IAEA) programs in 1994–1995. ...
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(2003)Ar/Ar dating of alkali basalt pipes and dikes of the North Minusinsk basin has provided an important chronologic framework for Altay-Sayan fold belt and Central Asia region. These Mesozoic basalt pipes have become the ...
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(1989)An analysis of the volcanic rocks of back-arc basins indicates that the compositions of the tholeiitic basalts extruded in the spreading centers of such basins is influenced by nearby island arcs. This influence may be ...
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(2001)The mass of sulfur dioxide (SO2) released by most explosive volcanic eruptions greatly exceeds the amount originally dissolved in the erupted volume of silicate melt. Several lines of evidence suggest that this discrepancy ...
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(2004)Hot volcanic vents promote the thermal fixation of atmospheric N2 into biologically available forms. The importance of this process for the global nitrogen cycle is poorly understood. At Masaya volcano, Nicaragua, NO and ...
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(2001)Mass accumulation rates (MAR) of different components of North Pacific deep-sea sediment provide detailed information about the timing of the onset of major Northern Hemisphere glaciation that occurred at 2.65Ma. An increase ...
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(2014)Southeast Asia has had both volcanic tsunamis and possesses some of the mostdensely populated, economically important and rapidly developing coastlines in the world.This contribution provides a review of volcanic tsunami ...
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(1961)
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(2006)Submarine explosive eruptions are generally considered to become less likely with increasing depth due to the increasing hydrostatic pressure of the overlying water column. Volcaniclastic deposits from the North Arch ...
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(1989)Recent work has shown that high-temperature hydrothermal activity in the rift structure of the East Pacific Rise (EPR) is concentrated within individual segments and occurs in zones extending along it for as far as several ...
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(1998)We review recent developments in the study of volcanism and tectonics on Venus. Venus's crust is basaltic, dry, and probably about 30 km thick. The mantle con-vects, giving rise to plumes, and has a similar composition and ...
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(Plenum Press, 1970)The present volume seems to me to be a particularly im portant one for several reasons. Not least among these is the fact that it summarizes the work of two decades by G. S. Gorshkov, one of the world's leading volcanologists. ...
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(2005)The laser 40Ar/39Ar dating technique has been applied to five Luna 16 basalt fragments and one impact glass, and nine Luna 24 basalt fragments and one breccia. The textures of these basalts are fine-grained ophitic and ...
Now showing items 17571-17590 of 40116