Franco, Carolina; Maldonado, Antonio; Ohlendorf, Christian; Gebhardt, Andrea Catalina; de Porras, María Eugenia; Nuevo-Delaunay, Amalia; Méndez, César; Zolitschka, Bernd (2024): Holocene multiproxy records of Laguna Meseta, Chile (46.5º S): XRF-elements, magnetic susceptibility, bulk chemistry and grain size [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.961940
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Abstract:
A 3 m-long continuous sediment record recovered from Laguna Meseta (LME), one of the lakes located on Meseta Chile Chico, Central Patagonia, Chile. Its radiocarbon chronology documents sediments of the last ~10,000 years indicating a minimum age for postglacial ice-free lacustrine conditions due to a westward retreat of the Large Patagonian Ice sheet. At this time, lacustrine productivity reached its maximum and decreased afterwards. Between 5,500 and 4,600 cal yr BP, a major shift towards allochthonous sediment accumulation occurred, caused by an abrupt increase in clastic deposition from basaltic lithologies of the Meseta Chile Chico. This episode correlates with the precipitation-driven Mid-Holocene glacier advance of Patagonian glaciers, suggesting a persisting glacial influence on the Meseta Chile Chico. After 4,600 cal yr BP wetter climate conditions returned to feed LME with fluvial sediments until a stepped decrease around 1,000 cal yr BP. Thereupon, lacustrine productivity distinctly increased and stabilized around 300 cal yr BP. Our reconstructions and comparisons with other regional paleoenvironmental studies indicate that environmental conditions of LME were mainly controlled by humidity changes on the Meseta Chile Chico and reflect Holocene climate variability.
Supplement to:
Franco, Carolina; Maldonado, Antonio; Ohlendorf, Christian; Gebhardt, Andrea Catalina; de Porras, María Eugenia; Nuevo-Delaunay, Amalia; Méndez, César; Zolitschka, Bernd (2024): Holocene environmental and climate evolution of central west Patagonia as reconstructed from lacustrine sediments of Meseta Chile Chico (46.5° S, Chile). Climate of the Past, 20(4), 817-839, https://doi.org/10.5194/cp-20-817-2024
Funding:
Agencia Nacional de Investigación y Desarrollo (ANID), grant/award no. 1210042: Exploradores en Aisén continental: una evaluación de las discontinuidades arqueológicas en el tiempo y el espacio
Agencia Nacional de Investigación y Desarrollo (ANID), grant/award no. R20F0002: Ecosystem, climate change and socio-environmental linkages along the continental-ocean continuum. Long-term socio-ecological research in Patagonia (PATSER)
Coverage:
Latitude: -46.716000 * Longitude: -71.844000
Event(s):
Laguna_Meseta (LME) * Latitude: -46.716000 * Longitude: -71.844000 * Elevation: 1457.0 m * Location: Meseta Chile Chico, Central-West Patagonia, Chile * Method/Device: Core (CORE) * Comment: Modified Livingston piston corer, 5 cm diameter (BT and CT sections) and UWITEC hammer corer, 9.6 cm diameter (Shc section). Date of coring: March 2020.
Comment:
Further funding:
Environmental and climate reconstruction for Chilean Patagonia - Investigations of lacustrine sediment record at Chile Chico Plateau and its surrounding area, Award: DAAD Doctoral programmes in Germany 2020/21
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
4 datasets
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Datasets listed in this bundled publication
- Franco, C; Maldonado, A; Ohlendorf, C et al. (2024): Bulk chemistry determination of Laguna Meseta (LME), Central Patagonia. https://doi.org/10.1594/PANGAEA.961935
- Franco, C; Maldonado, A; Ohlendorf, C et al. (2024): Grain size analysis of Laguna Meseta (LME), Central Patagonia. https://doi.org/10.1594/PANGAEA.961937
- Franco, C; Maldonado, A; Ohlendorf, C et al. (2024): Magnetic susceptibility of Laguna Meseta (LME), Central Patagonia. https://doi.org/10.1594/PANGAEA.961938
- Franco, C; Maldonado, A; Ohlendorf, C et al. (2024): XRF-elements of Laguna Meseta (LME), Central Patagonia. https://doi.org/10.1594/PANGAEA.961939