Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions
We investigate the oxygen and hydrogen stable isotopes of hydration water in gypsum (CaSO4·2H2O) from surface sediment of Laguna de la Ratosa playa-lake (northern Málaga Province, Spain). We aim to enhance the understanding of how lacustrine gypsum from playa-lakes can be used for paleoclimate reco...
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Sociedad Geológica de España
2024-11-01
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| Series: | Geogaceta |
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| Online Access: | https://recyt.fecyt.es/index.php/geogaceta/article/view/104479 |
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| author | Jorge Cañada-Pasadas Fernando Gázquez Lucía Martegani Claudia Voigt Antonio García-Alix Gonzalo Jiménez-Moreno Miguel Rodríguez-Rodríguez |
| author_facet | Jorge Cañada-Pasadas Fernando Gázquez Lucía Martegani Claudia Voigt Antonio García-Alix Gonzalo Jiménez-Moreno Miguel Rodríguez-Rodríguez |
| author_sort | Jorge Cañada-Pasadas |
| collection | DOAJ |
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We investigate the oxygen and hydrogen stable isotopes of hydration water in gypsum (CaSO4·2H2O) from surface sediment of Laguna de la Ratosa playa-lake (northern Málaga Province, Spain). We aim to enhance the understanding of how lacustrine gypsum from playa-lakes can be used for paleoclimate reconstruction. Gypsum samples were collected at 30-meter intervals along a transect from the shore to the depocenter of the lake. Comparison of δ18O and δ2H values of gypsum hydration water with the modern seasonal isotope variability of lake water point to gypsum formation in spring and early summer, before complete desiccation of the lake. An increasing trend in the δ18O and δ2H values of gypsum hydration water, by ~1,5 and ~15‰, respectively, is observed from the shore to the depocenter. This indicates that coeval gypsum formed in different parts of the lakebed record slightly different isotopic values of the lake water during precipitation. This spatial variability should be considered when interpreting stable isotope series of gypsum hydration water from ephemeral lake sediments.
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| format | Article |
| id | doaj-art-d892bd26a4c34e11bed735db4706f477 |
| institution | Kabale University |
| issn | 0213-683X 2173-6545 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Sociedad Geológica de España |
| record_format | Article |
| series | Geogaceta |
| spelling | doaj-art-d892bd26a4c34e11bed735db4706f4772024-11-25T14:25:07ZengSociedad Geológica de EspañaGeogaceta0213-683X2173-65452024-11-017610.55407/geogaceta104479Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructionsJorge Cañada-Pasadas0Fernando Gázquez1Lucía Martegani2Claudia Voigt3Antonio García-Alix4Gonzalo Jiménez-Moreno5Miguel Rodríguez-Rodríguez6Department of Biology and Geology, University of AlmeríaDepartment of Biology and Geology, University of Almería - Andalusian Centre for Global Change - Hermelindo Castro (ENGLOBA), University of AlmeríaDepartment of Biology and Geology, University of Almería - Andalusian Centre for Global Change - Hermelindo Castro (ENGLOBA), University of AlmeríaDepartment of Biology and Geology, University of AlmeríaDepartment of Stratigraphy and Paleontology, Campus de Fuentenueva, University of GranadaDepartment of Stratigraphy and Paleontology, Campus de Fuentenueva, University of GranadaDepartment of Physical, Chemical and Natural Systems, Pablo de Olavide University, Seville We investigate the oxygen and hydrogen stable isotopes of hydration water in gypsum (CaSO4·2H2O) from surface sediment of Laguna de la Ratosa playa-lake (northern Málaga Province, Spain). We aim to enhance the understanding of how lacustrine gypsum from playa-lakes can be used for paleoclimate reconstruction. Gypsum samples were collected at 30-meter intervals along a transect from the shore to the depocenter of the lake. Comparison of δ18O and δ2H values of gypsum hydration water with the modern seasonal isotope variability of lake water point to gypsum formation in spring and early summer, before complete desiccation of the lake. An increasing trend in the δ18O and δ2H values of gypsum hydration water, by ~1,5 and ~15‰, respectively, is observed from the shore to the depocenter. This indicates that coeval gypsum formed in different parts of the lakebed record slightly different isotopic values of the lake water during precipitation. This spatial variability should be considered when interpreting stable isotope series of gypsum hydration water from ephemeral lake sediments. https://recyt.fecyt.es/index.php/geogaceta/article/view/104479gypsumstable isotopesplaya-lakegypsum hydration water modern lake sediments |
| spellingShingle | Jorge Cañada-Pasadas Fernando Gázquez Lucía Martegani Claudia Voigt Antonio García-Alix Gonzalo Jiménez-Moreno Miguel Rodríguez-Rodríguez Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions Geogaceta gypsum stable isotopes playa-lake gypsum hydration water modern lake sediments |
| title | Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions |
| title_full | Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions |
| title_fullStr | Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions |
| title_full_unstemmed | Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions |
| title_short | Stable isotopes of gypsum hydration water in recent playa-lake sediments: implications for paleoclimate reconstructions |
| title_sort | stable isotopes of gypsum hydration water in recent playa lake sediments implications for paleoclimate reconstructions |
| topic | gypsum stable isotopes playa-lake gypsum hydration water modern lake sediments |
| url | https://recyt.fecyt.es/index.php/geogaceta/article/view/104479 |
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