Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO
The maar lake Laguna Potrok Aike is located in the semi-arid Patagonian steppe (52°S), an area with hitherto only scarce paleoenvironmental information. Within the project SALSA (South Argentinean Lake Sediment Archives and modeling) Laguna Potrok Aike turned out to be the key site for recording cli...
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ftawi:oai:epic.awi.de:22106 2024-09-15T17:47:57+00:00 Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO Haberzettl, T. Anselmetti, F. S. Bowen, S. W. Gebhardt, Catalina Hahn, Andrea Kliem, P. Lisé-Pronovost, A. Ohlendorf, C. St-Onge, G. Zolitschka, B. PASADO Science Team 2009 https://epic.awi.de/id/eprint/22106/ https://hdl.handle.net/10013/epic.34373 unknown Haberzettl, T. , Anselmetti, F. S. , Bowen, S. W. , Gebhardt, C. orcid:0000-0002-3227-0676 , Hahn, A. , Kliem, P. , Lisé-Pronovost, A. , Ohlendorf, C. , St-Onge, G. , Zolitschka, B. and PASADO Science Team (2009) Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO , Eos Trans. AGU, 90(22), Jt. Assem. Suppl., Abstract GA21B-06. . hdl:10013/epic.34373 EPIC3Eos Trans. AGU, 90(22), Jt. Assem. Suppl., Abstract GA21B-06. Conference notRev 2009 ftawi 2024-06-24T04:01:54Z The maar lake Laguna Potrok Aike is located in the semi-arid Patagonian steppe (52°S), an area with hitherto only scarce paleoenvironmental information. Within the project SALSA (South Argentinean Lake Sediment Archives and modeling) Laguna Potrok Aike turned out to be the key site for recording climatic events in that area. With a continuous, high-resolution multi-proxy approach applied to the radiocarbon, optical (OSL) and tephra-dated sediments it is possible to distinguish between high and low lake level stands. Hydrological variations seem to be linked to variations in the carbonate content of Laguna Potrok Aike sediments brought about by concentration and dilution processes which was confirmed by various other proxies of lake level changes. These variations not only give information about climate events like the Little Ice Age or the Medieval Climate Anomaly, but also reflect rapid hydrological variations in southern Patagonia during the past 16 ka. Recently, the record was extended to the past 55 ka and suggests a high lake level for Laguna Potrok Aike before 13.1 cal ka BP. Variations in grain size and comparison of magnetic susceptibility, an assumed dust proxy, at Laguna Potrok Aike with the non-sea-salt calcium flux at Dome C (Antarctica) indicate a relatively high aeolian input during the glacial period. Although the source of the dust found in Antarctic ice cores often has been attributed to Patagonia, this is the first evidence for a similar dust pattern for both the main source area of southern South America and Antarctica. Additionally, analyses of volcanic ashes revealed that Laguna Potrok Aike is perfectly suited to extend the southern South American tephra chronology. Up to now, already three formerly unknown volcanic ashes were recovered from the sediment cores and tentatively dated to Oxygen Isotope Stage 3. These three examples demonstrate the potential for future research on sediment cores from Laguna Potrok Aike recovered during the ICDP drilling project PASADO (Potrok Aike maar lake ... Conference Object Antarc* Antarctic Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The maar lake Laguna Potrok Aike is located in the semi-arid Patagonian steppe (52°S), an area with hitherto only scarce paleoenvironmental information. Within the project SALSA (South Argentinean Lake Sediment Archives and modeling) Laguna Potrok Aike turned out to be the key site for recording climatic events in that area. With a continuous, high-resolution multi-proxy approach applied to the radiocarbon, optical (OSL) and tephra-dated sediments it is possible to distinguish between high and low lake level stands. Hydrological variations seem to be linked to variations in the carbonate content of Laguna Potrok Aike sediments brought about by concentration and dilution processes which was confirmed by various other proxies of lake level changes. These variations not only give information about climate events like the Little Ice Age or the Medieval Climate Anomaly, but also reflect rapid hydrological variations in southern Patagonia during the past 16 ka. Recently, the record was extended to the past 55 ka and suggests a high lake level for Laguna Potrok Aike before 13.1 cal ka BP. Variations in grain size and comparison of magnetic susceptibility, an assumed dust proxy, at Laguna Potrok Aike with the non-sea-salt calcium flux at Dome C (Antarctica) indicate a relatively high aeolian input during the glacial period. Although the source of the dust found in Antarctic ice cores often has been attributed to Patagonia, this is the first evidence for a similar dust pattern for both the main source area of southern South America and Antarctica. Additionally, analyses of volcanic ashes revealed that Laguna Potrok Aike is perfectly suited to extend the southern South American tephra chronology. Up to now, already three formerly unknown volcanic ashes were recovered from the sediment cores and tentatively dated to Oxygen Isotope Stage 3. These three examples demonstrate the potential for future research on sediment cores from Laguna Potrok Aike recovered during the ICDP drilling project PASADO (Potrok Aike maar lake ... |
format |
Conference Object |
author |
Haberzettl, T. Anselmetti, F. S. Bowen, S. W. Gebhardt, Catalina Hahn, Andrea Kliem, P. Lisé-Pronovost, A. Ohlendorf, C. St-Onge, G. Zolitschka, B. PASADO Science Team |
spellingShingle |
Haberzettl, T. Anselmetti, F. S. Bowen, S. W. Gebhardt, Catalina Hahn, Andrea Kliem, P. Lisé-Pronovost, A. Ohlendorf, C. St-Onge, G. Zolitschka, B. PASADO Science Team Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
author_facet |
Haberzettl, T. Anselmetti, F. S. Bowen, S. W. Gebhardt, Catalina Hahn, Andrea Kliem, P. Lisé-Pronovost, A. Ohlendorf, C. St-Onge, G. Zolitschka, B. PASADO Science Team |
author_sort |
Haberzettl, T. |
title |
Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
title_short |
Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
title_full |
Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
title_fullStr |
Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
title_full_unstemmed |
Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO |
title_sort |
laguna potrok aike, southern patagonia, argentina: achievements and resulting potential for the icdp project pasado |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/22106/ https://hdl.handle.net/10013/epic.34373 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
EPIC3Eos Trans. AGU, 90(22), Jt. Assem. Suppl., Abstract GA21B-06. |
op_relation |
Haberzettl, T. , Anselmetti, F. S. , Bowen, S. W. , Gebhardt, C. orcid:0000-0002-3227-0676 , Hahn, A. , Kliem, P. , Lisé-Pronovost, A. , Ohlendorf, C. , St-Onge, G. , Zolitschka, B. and PASADO Science Team (2009) Laguna Potrok Aike, Southern Patagonia, Argentina: Achievements and Resulting Potential for the ICDP Project PASADO , Eos Trans. AGU, 90(22), Jt. Assem. Suppl., Abstract GA21B-06. . hdl:10013/epic.34373 |
_version_ |
1810497674269425664 |