We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Electrical conductivity of hydrous silicate melts and aqueous fluids: Measurement and applications.
- Authors
Guo, Xuan; Chen, Qi; Ni, HuaiWei
- Abstract
The combination of magnetotelluric survey and laboratory measurements of electrical conductivity is a powerful approach for exploring the conditions of Earth's deep interior. Electrical conductivity of hydrous silicate melts and aqueous fluids is sensitive to composition, temperature, and pressure, making it useful for understanding partial melting and fluid activity at great depths. This study presents a review on the experimental studies of electrical conductivity of silicate melts and aqueous fluids, and introduces some important applications of experimental results. For silicate melts, electrical conductivity increases with increasing temperature but decreases with pressure. With a similar Na concentration, along the calc-alkaline series electrical conductivity generally increases from basaltic to rhyolitic melt, accompanied by a decreasing activation enthalpy. Electrical conductivity of silicate melts is strongly enhanced with the incorporation of water due to promoted cation mobility. For aqueous fluids, research is focused on dilute electrolyte solutions. Electrical conductivity typically first increases and then decreases with increasing temperature, and increases with pressure before approaching a plateau value. The dissociation constant of electrolyte can be derived from conductivity data. To develop generally applicable quantitative models of electrical conductivity of melt/fluid addressing the dependences on temperature, pressure, and composition, it requires more electrical conductivity measurements of representative systems to be implemented in an extensive P-T range using up-to-date methods.
- Subjects
ELECTRIC conductivity research; ELECTRIC properties; FREE electron theory of metals; SILICATES; OXYGEN compounds
- Publication
SCIENCE CHINA Earth Sciences, 2016, Vol 59, Issue 5, p889
- ISSN
1674-7313
- Publication type
Article
- DOI
10.1007/s11430-016-5267-y