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The compressibility of silicate liquids containing Fe2O3 and the effect of composition, temperature, oxygen fugacity and pressure on their redox states
Ultrasonic longitudinal acoustic velocities in oxidized silicate liquids indicate that the pressure derivative of the partial-molar volume of Fe2O3 is the same in iron-rich alkali-, alkaline earth-…
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The redox states of basic and silicic magmas: a reflection of their source regions?
At present the best estimates of the oxygen fugacity of spinel-lherzolites that could be the source material of basic magmas is about five log units below the Ni−NiO buffer to one above it. However…
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Oxidation states of mid-ocean ridge basalt glasses
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Densities of Na2O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-TiO2-SiO2 liquids: New measurements and derived partial molar properties
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The 1982 eruptions of El Chichón Volcano, Chiapas, Mexico: Mineralogy and petrology of the anhydritebearing pumices
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The hydrous phase equilibria (to 3 kbar) of an andesite and basaltic andesite from western Mexico: constraints on water content and conditions of phenocryst growth
Abstract We have conducted high pressure (to 3 kbar), water saturated melting experiments on an andesite (62 wt% SiO2) and a basaltic andesite (55 wt% SiO2) from western Mexico. A close comparison…
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The Petrology of Thingmuli, a Tertiary Volcano in Eastern Iceland
The Tertiary flood-basalt sequence of eastern Iceland is intermittently disturbed by central volcanic activity with the voluminous eruption of acid magma. Associated with one of these central…
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The ferric-ferrous ratio of natural silicate liquids equilibrated in air
AbstractResults of chemical analyses of glasses produced in 46 melting experiments in air at 1,350° C and 1,450° C on rocks ranging in composition from nephelinite to rhyolite have been combined with…
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An empirical model for the solubility of H2O in magmas to 3 kilobars
Abstract We present 16 new manometric determinations of H2O solubility for a range of natural silicate liquid compositions equilibrated up to 3 kbar of H2O pressure. As the threshold temperature of…
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The andesite aqueduct: perspectives on the evolution of intermediate magmatism in west-central (105–99°W) Mexico
Abstract Intermediate calc-alkaline magma (52–65% SiO2) in western-central Mexico is the focus of this paper, and the typically porphyritic andesites (57–65% SiO2) form large central volcanoes,…
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