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Journal Articles Computers & Geosciences Year : 2011

"Sigmelts": A web portal for electrical conductivity calculations in geosciences

Abstract

Electrical conductivity measurements in the laboratory are critical for interpreting geoelectric and magnetotelluric profiles of the Earth's crust and mantle. In order to facilitate access to the current database on electrical conductivity of geomaterials, we have developed a freely available web application (SIGMELTS) dedicated to the calculation of electrical properties. Based on a compilation of previous studies, SIGMELTS computes the electrical conductivity of silicate melts, carbonatites, minerals, fluids, mantle materials as a function of different parameters, such as composition, temperature, pressure, water content, oxygen fugacity. Calculations on two-phase mixtures are also implemented using existing mixing models for different geometries. An illustration of the use of SIGMELTS is provided, in which calculations are applied to subduction zone related volcanic zone in the Central Andes. Along with petrological considerations, field and laboratory electrical data allow discrimination between the different hypotheses regarding the formation and rise from depth of melts and fluids and to quantify their storage conditions.
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Dates and versions

insu-00563856 , version 1 (07-04-2011)

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Anne Pommier, Emmanuel Le Trong. "Sigmelts": A web portal for electrical conductivity calculations in geosciences. Computers & Geosciences, 2011, 37, pp.1450-1459. ⟨10.1016/j.cageo.2011.01.002⟩. ⟨insu-00563856⟩
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