STRONTIUM DIFFUSION IN SANIDINE AND ALBITE, AND GENERAL COMMENTS ON STRONTIUM DIFFUSION IN ALKALI FELDSPARS
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dc.contributor.author | Cherniak D.J. | |
dc.date.accessioned | 2020-11-23T10:55:16Z | |
dc.date.available | 2020-11-23T10:55:16Z | |
dc.date.issued | 1996 | |
dc.identifier | https://elibrary.ru/item.asp?id=491657 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1996, , 24, 5037-5043 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/19420 | |
dc.description.abstract | Strontium chemical diffusion has been measured in albite and sanidine under dry, 1 atm, and QFM buffered conditions. Strontium oxide-aluminosilicate powdered sources were used to introduce the diffusant and Rutherford Backscattering Spectroscopy (RBS) used to measure diffusion profiles. For the 1 atm experiments, the following Arrhenius relations were obtained: Sanidine (Or61), temperature range 725-1075°C, diffusion normal to (001):D = 8.4 exp(-450 +/- 13 kJ mol-1/RT) m2s-1. Albite (Or1), temperature range 675-1025°C, diffusion normal to (001):D = 2.9 x 10-9 exp(-224 +/- 11 kJ mol-1/RT) m2s-1. The alkali feldspars in this and earlier work display a broad range of activation energies for Sr diffusion, which may be a consequence of the thermodynamic non-ideality of the alkali feldspar system and/or the mixed alkali effect. | |
dc.title | STRONTIUM DIFFUSION IN SANIDINE AND ALBITE, AND GENERAL COMMENTS ON STRONTIUM DIFFUSION IN ALKALI FELDSPARS | |
dc.type | Статья |
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