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Authordc.contributor.authorRodrigo, Cristián
Authordc.contributor.authorCifuentes, Erick
Authordc.contributor.authorFernández Vásquez, Rodrigo Alejandro
Authordc.contributor.authorAndrade, José
Authordc.contributor.authorRebolledo, Lorena
Authordc.contributor.authorMuñoz, Diego
Authordc.contributor.authorMuñoz, Práxedes
Cita de ítemdc.identifier.citationFront. Mar. Sci. 9:612021es_ES
Abstractdc.description.abstractIn a period of high rates of glacier retreat, increasing meltwater discharge from tidewater glaciers can influence marine fjord ecosystems due to increase sediment delivery and accumulation rates in the proglacial environment. Glacier variations and associated changes in glacimarine processes are recorded in the sedimentary record and submarine geomorphology of fjords. In October-November 2017, CIMAR23 Cruise surveyed several fjords adjacent to the Southern Patagonian Icefield (SPI). In this study, we show detailed results of the multibeam bathymetry, backscatter and sub-bottom seismic profiles, and sediment core samples from Europa Fjord, located west of the central SPI area, to improve the analysis of the fjord glacial and sedimentary evolution and to connect its behavior with the other fjords in the region. For the cores Pb-210 chronology, magnetic susceptibility, organic carbon, total nitrogen, and stable isotopes (delta C-13(org), delta N-15) were performed. The seafloor geomorphology showed that the most prominent submarine landforms are transverse morainal ridges, which indicate past stillstand glacier positions; these features formed during the deglaciation of the fjord (latest Pleistocene), and some, perhaps more recently during short episodic advance/retreat events. In the central and mouth fjord areas, erosional features such as lineations are found on the rocky bottom and interpreted as formed by past grounded glaciers. Several submarine moraines are generally well preserved, but some parts are crumbled by slope failures and erosion. Most of the seismic sections are interpreted as the expected subglacial-ice proximal-ice distal succession of facies, characteristic of single retreat environments. The sedimentary record includes bioturbed muds with muddy laminations and variable amounts of coarse sediments interpreted as ice rafted debris, suggesting a proglacial environment, punctuated by calving. From the beginning of the twentieth century there is a tendency to an increase in the terrigenous organic material content, including an abrupt increase during the 80-90s, and a decline in the last decade. This behavior is indicating possibly a general increase of surface terrestrial runoff and, for the last decade, an increase of glacial meltwater input which would be caused by an accelerated deglaciation.es_ES
Patrocinadordc.description.sponsorshipCONA C23 F17-07es_ES
Publisherdc.publisherFrontiers Mediaes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.uri*
Sourcedc.sourceFrontiers in Marine Sciencees_ES
Keywordsdc.subjectAcoustic dataes_ES
Keywordsdc.subjectSubmarine landformses_ES
Keywordsdc.subjectClimate changees_ES
Títulodc.titleSubmarine geomorphology and glacimarine sedimentary processes associated to deglaciation in Europa Fjord, chilean Patagoniaes_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Indexationuchile.indexArtículo de publícación WoSes_ES

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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States