Academic Journal
Cryogenic ridges: a new speleothem type
| العنوان: | Cryogenic ridges: a new speleothem type |
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| المؤلفون: | Onac, Bogdan P, Cleary, Daniel M., Dumitru, Oana A., Polyak, Victor J., Povara, Ioan, Wynn, Jonathan G., Asmerom, Yemane |
| المصدر: | International Journal of Speleology |
| بيانات النشر: | Digital Commons @ University of South Florida |
| سنة النشر: | 2023 |
| المجموعة: | University of South Florida St. Petersburg: Digital USFSP |
| مصطلحات موضوعية: | freezing, cave, carbonate, stable isotopes, Romania, Geochemistry, Speleology |
| الوصف: | Cryogenic cave carbonates have been described from several formerly or presently glaciated karst caves. In most of these occurrences, they precipitated as loose grains or aggregates with various morphologies and sizes. Here, we report on a new speleothem type (cryogenic ridges) identified in Sohodoalele Mici Cave (SW Romania) within a large chamber near the entrance shaft. This study was motivated by the presence of a network of calcite ridges over the stalactites’ surface and by the observation that during winter, these speleothems are covered by a thin ice layer. The higher δ18O (−3.5 to –1‰) and δ13C (0 to 7‰) values found in the calcite ridges relative to δ18O (–7.5 to –4‰) and δ13C (–9 to –2‰) values of calcite from the inner stalactite indicate that the ridges are of cryogenic origin and formed during relatively rapid carbonate precipitation associated with evaporative cooling and freezing of the water. Four U-series ages suggest that the stalactites with ridges formed during cold winters of the Holocene, when cave air temperatures dropped below freezing. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | https://digitalcommons.usf.edu/ijs/vol52/iss1/1; https://digitalcommons.usf.edu/context/ijs/article/2416/viewcontent/52_1_1_Onac_etal.pdf; https://digitalcommons.usf.edu/context/ijs/article/2416/filename/5/type/additional/viewcontent/Onac_etal_Supplementary_information.pdf; https://digitalcommons.usf.edu/context/ijs/article/2416/filename/7/type/additional/viewcontent/Onac_etal.ris; https://digitalcommons.usf.edu/context/ijs/article/2416/filename/8/type/additional/viewcontent/Graphical_abstract.pdf |
| DOI: | 10.5038/1827-806X.52.1.2416 |
| الاتاحة: | https://digitalcommons.usf.edu/ijs/vol52/iss1/1 https://doi.org/10.5038/1827-806X.52.1.2416 https://digitalcommons.usf.edu/context/ijs/article/2416/viewcontent/52_1_1_Onac_etal.pdf https://digitalcommons.usf.edu/context/ijs/article/2416/filename/5/type/additional/viewcontent/Onac_etal_Supplementary_information.pdf https://digitalcommons.usf.edu/context/ijs/article/2416/filename/7/type/additional/viewcontent/Onac_etal.ris https://digitalcommons.usf.edu/context/ijs/article/2416/filename/8/type/additional/viewcontent/Graphical_abstract.pdf |
| Rights: | http://creativecommons.org/licenses/by-nc-sa/4.0/legalcode |
| رقم الانضمام: | edsbas.A405CE62 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5038/1827-806X.52.1.2416 |
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