OXYGEN ISOTOPE FRACTIONATION IN SYNTHETIC MAGNESIAN CALCITE
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dc.contributor.author | Jimenez-Lopez C. | |
dc.contributor.author | Romanek C.S. | |
dc.contributor.author | Huertas F.J. | |
dc.contributor.author | Ohmoto H. | |
dc.contributor.author | Caballero E. | |
dc.date.accessioned | 2022-03-21T07:44:13Z | |
dc.date.available | 2022-03-21T07:44:13Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=12090497 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2004, 68, 16, 3367-3377 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/36485 | |
dc.description.abstract | Mg-bearing calcite was precipitated at 25°C in closed system free-drift experiments from solutions containing NaHCO3, CaCl2 and MgCl2. The chemical and isotope composition of the solution and precipitate were investigated during time course experiments of 24-h duration. Monohydrocalcite and calcite precipitated early in the experiments (<8 h), while Mg-calcite was the predominant precipitate (>95%) thereafter. Solid collected at the end of the experiments displayed compositional zoning from pure calcite in crystal cores to up to 23 mol% MgCO3 in the rims. Smaller excursions in Mg were superimposed on this chemical record, which is characteristic of oscillatory zoning observed in synthetic and natural solid-solution carbonates of differing solubility. Magnesium also altered the predominant morphology of crystals over time from the {104} to {100} and {110} growth forms. | |
dc.subject | calcite | |
dc.title | OXYGEN ISOTOPE FRACTIONATION IN SYNTHETIC MAGNESIAN CALCITE | |
dc.type | Статья |
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