MODEL EVAPORATION OF FEO-BEARING LIQUIDS: APPLICATION TO CHONDRULES
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dc.contributor.author | Ebel D.S. | |
dc.date.accessioned | 2023-11-18T10:28:20Z | |
dc.date.available | 2023-11-18T10:28:20Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=12092200 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2005, 69, 12, 3183-3193 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/41882 | |
dc.description.abstract | Models for thermodynamic behavior of FeO-bearing liquids are required for understanding the separate roles of evaporation, condensation and crystallization in the formation of free-floating silicate liquid droplets in the early solar nebula. These droplets, frozen as chondrules, are common in chondritic meteorites. Evaporation coefficients for Fe and FeO of ∼0.2 are calculated here from existing data using silicate liquid activity models. These models, used to describe gas-liquid-solid equilibria and to constrain kinetic processes, are compared and found similar, and the effects of liquid non-ideality are assessed. A general approach is presented for predicting the evaporation behavior of FeO-bearing Al2O3-CaO-SiO2-MgO liquids in H2-rich gas above 1400 K at low total pressure. Results are vapor pressure curves for Fe, FeO and other gas species above typical chondrule liquids, suitable for predicting compositional trajectories of residual liquids evaporating in a hydrogen-dominated vapor. These predictions are consistent with chondrule formation in the protoplanetary disk in heating events of short duration, such as those expected from shock wave or current sheet models. | |
dc.title | MODEL EVAPORATION OF FEO-BEARING LIQUIDS: APPLICATION TO CHONDRULES | |
dc.type | Статья | |
dc.identifier.doi | 10.1016/j.gca.2005.02.008 |
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