NON-ARRHENIAN MULTICOMPONENT MELT VISCOSITY: A MODEL
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dc.contributor.author | Giordano D. | |
dc.contributor.author | Dingwell D.B. | |
dc.date.accessioned | 2021-12-23T04:03:28Z | |
dc.date.available | 2021-12-23T04:03:28Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=1463247 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2003, 208, 3-4, 337-349 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/33765 | |
dc.description.abstract | Newtonian viscosities of 19 natural multicomponent melts ranging in composition from basanite through phonolite and trachyte, to dacite have been analysed in the range of 100-1012 Pa s. These data, together with the results of previous investigations obtained using concentric-cylinder, parallel-plate and micropenetration methods, form the basis of an analysis of multicomponent non-Arrhenian Newtonian viscosity. Regressions of the combined (high and low temperature) viscosities (ca 350 data points) were performed using the three-parameter Tammann-Vogel-Fulcher (TVF) equation:log10η=ATVF+BTVFT-T0The resulting TVF parameters were used to compose the first non-Arrhenian model for multicomponent silicate melt viscosity. The model accommodates the effects of composition via an empirical parameter, here termed the structure modifier content (SM). SM is the mol% summation of molar oxides of Ca, Mg, Mn, Fetot/2, Na and K. The approach is validated by the predictive capability of the viscosity model. The model reproduces the entire original dataset to within <10% on a logarithmic scale, over 10 orders of magnitude of viscosity, 1000°C and the entire range of composition. Comparison with other empirical parameters and the Shaw model [Shaw, Am. J. Sci. 272 (1972) 870-893] is also provided. | |
dc.subject | NEWTONIAN | |
dc.subject | VISCOSITY-PREDICTION | |
dc.subject | MULTICOMPONENT | |
dc.subject | SILICATES | |
dc.subject | Tonian | |
dc.title | NON-ARRHENIAN MULTICOMPONENT MELT VISCOSITY: A MODEL | |
dc.type | Статья | |
dc.subject.age | Precambrian::Proterozoic::Neoproterozoic::Tonian | |
dc.subject.age | Докембрий::Протерозой::Неопротерозойская::То́ний | ru |
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