An isotopic study of a late Quaternary loess-paleosol sequence in SW Germany
A late Quaternary loess-paleosol sequence at Schattenhausen (SW Germany) was studied by isotopic methods (δ13C, δ18O, 14C age). The stable isotopic composition of organic carbon indicates that C3 vegetation dominated the site during most of the time of formation of the loess-paleosol sequence (δ13C...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Mexicana de Ciencias Geológicas |
| Idioma: | inglés |
| OAI Identifier: | oai:ojs.rmcg.geociencias.unam.mx:article/905 |
| Acesso em linha: | http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/905 |
| Access Level: | acceso abierto |
| Resumo: | A late Quaternary loess-paleosol sequence at Schattenhausen (SW Germany) was studied by isotopic methods (δ13C, δ18O, 14C age). The stable isotopic composition of organic carbon indicates that C3 vegetation dominated the site during most of the time of formation of the loess-paleosol sequence (δ13C = -26 to -20 ‰). However, there was a short period in the Late Pleniglacial with a pronounced C4 excursion of the δ13C values (-16 to -19 ‰) of organic matter. Calcified root cells (δ13C = -8 to -11 ‰ and δ18O = ca. -6.5‰) are isotopically different from diffuse carbonate in the loess and soil matrix (δ13C = -1 to -2.5 ‰; δ18O = -6 to -7.5 ‰). The stable isotopic composition of carbon and oxygen of the calcified root cells in combination with their 14C ages suggest that they formed, at least partially, in the Holocene. |
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