Journal ArticleDOI
Pressure, gas content and eruption periodicity of a shallow, crystallising magma chamber
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In this paper, the authors present a model of the triggering of volcanic eruptions based on fractional crystallization and oversaturation of volatile species in a shallow magma chamber and calculate the overpressure in the chamber and consequent increase in its volume by deformation of the surrounding rocks.About:
This article is published in Earth and Planetary Science Letters.The article was published on 1989-02-01. It has received 452 citations till now. The article focuses on the topics: Gas slug & Magma chamber.read more
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Towards forecasting volcanic eruptions using seismic noise
Florent Brenguier,Nikolai M. Shapiro,Michel Campillo,Valérie Ferrazzini,Zacharie Duputel,Olivier Coutant,Alexandre Nercessian +6 more
TL;DR: In this paper, the authors used the properties of ambient seismic noise recorded over an 18-month interval to show that changes in the interior of the Piton de la Fournaise volcano can be monitored continuously by measuring very small relative seismicvelocity perturbations, of the order of 0.05%.
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Gas content, eruption rate and instabilities of eruption regime in silicic volcanoes
Claude Jaupart,Claude J. Allègre +1 more
TL;DR: In this article, it was shown that very small pressure fluctuations of the order of one bar in the chamber lead to large changes of gas content at the vent, and this decrease acts to increase the fraction of gas lost to the country rock and hence to reduce the gas content of the erupted material.
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The 15 June 1991 Eruption of Mount Pinatubo. I. Phase Equilibria and Pre-eruption P–T–fO2–fH2O Conditions of the Dacite Magma
Bruno Scaillet,Bernard W. Evans +1 more
TL;DR: In this paper, compositional zoning of hornblende is performed on a representative consistent either with an early crystallization event at ~400 MPa sample of the crystal-rich dacite ejected during the 15 June 1991 and 840-900°C, or with mixing events before eruption.
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Lunar mare volcanism: Stratigraphy, eruption conditions, and the evolution of secondary crusts
TL;DR: A review of recent developments in the geological analysis of lunar mare volcanism can be found in this paper, where the authors show that mare volcanic activity began prior to the end of heavy bombardment (the period of cryptomare formation), in pre-Nectarian times, and continued until the Copernical Period, the total duration approaching 3.5-4 Ga.
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SEISMIC TRIGGERING OF ERUPTIONS IN THE FAR FIELD: Volcanoes and Geysers
Michael Manga,Emily E. Brodsky +1 more
TL;DR: Several mechanisms have been proposed to explain triggering through changes in magma overpressure, including the growth of bubbles, the advection of large pressures by rising bubbles, and overturn of magma chambers as discussed by the authors.
References
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Elastic stress and deformation near a finite spherical magma body: Resolution of the point source paradox
TL;DR: In this paper, the authors obtained an O(e5-approximation for the surface uplift with respect to a point dilatation, which is consistent with the locus of fractures radiating outward from the magma body inferred by seismic methods in Long Valley, California.
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Physical Properties of Rocks and Minerals
TL;DR: In this article, a compilation of rock properties has been prepared because determination of one or more rock properties is essential in locating and extracting mineral, including certain minerals, such as gold and diamonds.
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The Solubility of Water and Effects of Oxygen Fugacity and Water Content on Crystallization in Mafic Magmas
TL;DR: The solubility of water in a basaltic and an andesitic melt has been determined in the pressure range from approximately 1,000 to 6,000 bars at 1,100°C as mentioned in this paper.
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Melt segregation from partially molten source regions: The importance of melt density and source region size
TL;DR: In this article, it was shown that the density contrast between melt and the principal residual crystals in mantle source regions is expected to decrease with increasing source region depth, due to cooling of the source region (freezing melt in) and rigidity of the crystalline matrix (mechanically trapping melt).