Holocene multiproxy records of Laguna Meseta, Chile (46.5º S): XRF-elements, magnetic susceptibility, bulk chemistry and grain size


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.

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

DOI https://doi.org/10.1594/PANGAEA.961940
Related Identifier IsSupplementTo https://doi.org/10.5194/cp-20-817-2024
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.961940
Creator Franco, Carolina ORCID logo; Maldonado, Antonio ORCID logo; Ohlendorf, Christian ORCID logo; Gebhardt, Andrea Catalina ORCID logo; de Porras, María Eugenia; Nuevo-Delaunay, Amalia; Méndez, César; Zolitschka, Bernd ORCID logo
Publisher PANGAEA
Publication Year 2024
Funding Reference Agencia Nacional de Investigación y Desarrollo https://doi.org/10.13039/501100002848 Crossref Funder ID 1210042 Exploradores en Aisén continental: una evaluación de las discontinuidades arqueológicas en el tiempo y el espacio; Agencia Nacional de Investigación y Desarrollo https://doi.org/10.13039/501100002848 Crossref Funder ID R20F0002 Ecosystem, climate change and socio-environmental linkages along the continental-ocean continuum. Long-term socio-ecological research in Patagonia (PATSER)
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 4 datasets
Discipline Earth System Research
Spatial Coverage (-71.844 LON, -46.716 LAT); Meseta Chile Chico, Central-West Patagonia, Chile