(Energetics of silicate melts from thermal diffusion studies)

Technical Report · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6193592· OSTI ID:6193592

The first year of this three year renewal award has been used to continue data collection and analysis of thermal (Soret) diffusion in silicate liquid and explore the related process of thermal migration in subliquidus magmas and isothermal interdiffusion. Data collection efforts have been materially aided by advances in thermal insulation in the pressure media outside our pressurized cylindrical heaters. BaCO{sub 3} is very effective in protecting the pressure vessel core from thermal deterioration with the result that the heater inside and outside diameters can be substantially increased. This permits several charges to be run simultaneously in an axisymmetric cluster around a double or triple junction thermocouple which can measure axial thermal gradients in situ. Research during the past year has concentrated in four major areas: Modelling thermal diffusion in multi-component silicate liquids, Soret fractionation of major and minor chemical components, characterization of thermal diffusion in naturally-occurring magmas with an emphasis on volatile bearing rhyolitic melts, and the effects of thermal gradients on silicate magma in the melting interval.

• Research Organization: Columbia Univ., Palisades, NY (USA). Lamont-Doherty Geological Observatory
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-84ER13287
• OSTI ID: 6193592
• Report Number(s): DOE/ER/13287-T2; ON: DE91004611
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
58 GEOSCIENCES
MAGMA
THERMAL DIFFUSION
SILICATES
BARIUM CARBONATES
BINARY MIXTURES
BOROSILICATE GLASS
MATHEMATICAL MODELS
PETROLOGY
PROGRESS REPORT
THERMAL ANALYSIS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
DIFFUSION
DISPERSIONS
DOCUMENT TYPES
GEOLOGY
GLASS
MIXTURES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
360603* - Materials- Properties
580000 - Geosciences