Volcanism and climate change as drivers in Holocene depositional dynamic of Laguna del Maule (Andes of central Chile - 36° S)

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dc.contributor.authorFrugone Álvarez, Matías
dc.contributor.authorLatorre, Claudio
dc.contributor.authorBarreiro Lostres, Fernando
dc.contributor.authorGiralt, Santiago R.
dc.contributor.authorMoreno Caballud, Ana
dc.contributor.authorPolanco Martínez, Josué M.
dc.contributor.authorMaldonado, Antonio
dc.contributor.authorCarrevedo, María Laura
dc.contributor.authorBernárdez, Patricia
dc.contributor.authorPrego Reboredo, Ricardo
dc.contributor.authorDelgado Huertas, Antonio
dc.contributor.authorFuentealba, Magdalena
dc.contributor.authorValero Garcés, Blas Lorenzo
dc.date.accessioned2025-06-11T09:48:26Z
dc.date.available2025-06-11T09:48:26Z
dc.date.issued2020-07-02
dc.date.updated2025-06-11T09:48:26Z
dc.description.abstractLate Quaternary volcanic basins are active landscapes from which detailed archives of past climate and seismic and volcanic activity can be obtained. A multidisciplinary study performed on a transect of sediment cores was used to reconstruct the depositional evolution of the highelevation Laguna del Maule (LdM) (36 S, 2180ma.s.l., Chilean Andes). The recovered 5m composite sediment sequence includes two thick turbidite units (LT1 and LT2) and numerous tephra layers (23 ash and 6 lapilli). We produced an age model based on nine new 14C AMS dates, existing 210Pb and 137Cs data, and the Quizapú ash horizon (1932 CE). According to this age model, the relatively drier Early Holocene was followed by a phase of increased productivity during the mid-Holocene and higher lake levels after 4.0 ka cal BP. Major hydroclimate transitions occurred at ca. 11, 8.0, 4.0 and 0.5 ka cal BP. Decreased summer insolation and winter precipitation due to a southward shift in the southern westerly winds and a strengthened Pacific Subtropical High could explain Early Holocene lower lake levels. Increased biological productivity during the mid- Holocene ( 8:0 to 6.0 ka cal BP) is coeval with a warm-dry phase described for much of southern South America. Periods of higher lake productivity are synchronous to a higher frequency of volcanic events. During the Late Holocene, the tephra layers show compositional changes suggesting a transition from silica-rich to silica-poor magmas at around 4.0 ka cal BP. This transition was synchronous with increased variability of sedimentary facies and geochemical proxies, indicating higher lake levels and increased moisture at LdM after 4.0 ka cal BP, most likely caused by the inception of current El Niño-Southern Oscillation and Pacific Decadal Oscillation (ENSO-PDO) dynamics in central Chile.en
dc.description.sponsorshipThis research has been supported by the HOLOCHILL project (grant no. CGL2012-32501), the IEB (grant no. PFB23), the FONDECYT (grant nos. 1150763, 1140837, 3180368), the CONICYT PCI project (grant no. PII20150081), the ICM (grant no. NC120066), and the PCI CONICYT (grant no. Proyecto Anillo SOC1405)en
dc.identifier.citationFrugone-Alvarez, M., Latorre, C., Barreiro-Lostres, F., Giralt, S., Moreno, A., Polanco-Martinez, J., Maldonado, A., Carrevedo, M. L., Bernárdez, P., Prego, R., Delgado Huertas, A., Fuentealba, M., & Valero-Garcés, B. (2020). Volcanism and climate change as drivers in Holocene depositional dynamic of Laguna del Maule (Andes of central Chile - 36° S). Climate of the Past, 16(4), 1097-1125. https://doi.org/10.5194/CP-16-1097-2020
dc.identifier.doi10.5194/CP-16-1097-2020
dc.identifier.eissn1814-9332
dc.identifier.issn1814-9324
dc.identifier.urihttps://hdl.handle.net/20.500.14454/3007
dc.language.isoeng
dc.publisherCopernicus GmbH
dc.rights© Author(s) 2020
dc.titleVolcanism and climate change as drivers in Holocene depositional dynamic of Laguna del Maule (Andes of central Chile - 36° S)en
dc.typejournal article
dcterms.accessRightsopen access
oaire.citation.endPage1125
oaire.citation.issue4
oaire.citation.startPage1097
oaire.citation.titleClimate of the Past
oaire.citation.volume16
oaire.licenseConditionhttps://creativecommons.org/licenses/by/4.0/
oaire.versionVoR
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