The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)

Banyoles (42°08′N, 2°45′E) is the largest and deepest lake of karstic<br>tectonic origin in the Iberian Peninsula. The lake comprises two basins and six sub-circularly shaped sub-basins fed by subaquatic springs. Periods of intense groundwater inflow in the deepest sub-basins lead to the fluid...

Descripción completa

Detalles Bibliográficos
Autores: Morellón, Mario, Anselmetti, Flavio S., Valero Garcés, Blas Lorenzo, Giralt Romeu, Santiago, Ariztegui, Daniel, Sáez, Alberto, Mata, M. Pilar, Barreiro-Lostres, Fernando, Rico, Mayte, Moreno, Ana
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/59545
Acceso en línea:https://hdl.handle.net/2445/59545
Access Level:acceso abierto
Palabra clave:Sediments lacustres
Pla de l'Estany (Catalunya)
Lake sediments
Pla de l'Estany (Catalonia)
id ES_abdbf3a6ddfb55a0bb73aba6ecd7e930
oai_identifier_str oai:recercat.cat:2445/59545
network_acronym_str ES
network_name_str España
repository_id_str
spelling The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)Morellón, MarioAnselmetti, Flavio S.Valero Garcés, Blas LorenzoGiralt Romeu, SantiagoAriztegui, DanielSáez, AlbertoMata, M. PilarBarreiro-Lostres, FernandoRico, MayteMoreno, AnaSediments lacustresPla de l'Estany (Catalunya)Lake sedimentsPla de l'Estany (Catalonia)Banyoles (42°08′N, 2°45′E) is the largest and deepest lake of karstic<br>tectonic origin in the Iberian Peninsula. The lake comprises two basins and six sub-circularly shaped sub-basins fed by subaquatic springs. Periods of intense groundwater inflow in the deepest sub-basins lead to the fluidization and re-suspension of previously deposited sediments and subsequent settling forming homogenite deposits on the southern basin intermediate platforms. The multiproxy analysis of sediment cores combined with high resolution seismic stratigraphy (3.5 kHz pinger and multi-frequency Chirp surveys) allows a precise reconstruction of depositional environments and related hydrological variability and groundwater inflowduring the last ca. 7.6 cal kyr BP. According to the agemodel based on 137Cs, 210Pb and AMS 14C dating, homogenite deposition occurred between 7.2 and 5.5 cal kyr BP, stopped during the middle Holocene (5.5<br>2.8 cal kyr BP) and greatly increased during the last two millennia with a total of 17 homogenite layers individually up to 75 cm-thick. The onset of this unique sedimentation mode at ca. 3 cal kyr BP coincides with an increase in lake level, evidenced by the onlapping of fine-grained, distal sediments over coarser massive, carbonate-rich, littoral deposits. A detailed, multidisciplinary study of the homogenites (sedimentology, physical properties, high-resolution elemental geochemistry, mineral composition, grain-size, organic matter content and SEM) combined with seismic stratigraphy demonstrates that the fluidization events triggering the formation of the homogenites were caused by higher and more intense local groundwater inflow, related to increased rainfall during the Late Holocene and likely intensified by land use changes during the last millennium.University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics2014201420142014info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion16 p.application/pdfhttps://hdl.handle.net/2445/59545Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://doi.org/10.1016/j.sedgeo.2014.07.004Sedimentary Geology, 2014, vol. 311, p. 96-111http://doi.org/10.1016/j.sedgeo.2014.07.004(c) University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics, 2014info:eu-repo/semantics/openAccessoai:recercat.cat:2445/595452026-05-29T05:05:01Z
dc.title.none.fl_str_mv The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
title The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
spellingShingle The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
Morellón, Mario
Sediments lacustres
Pla de l'Estany (Catalunya)
Lake sediments
Pla de l'Estany (Catalonia)
title_short The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
title_full The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
title_fullStr The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
title_full_unstemmed The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
title_sort The influence of subaquatic springs in lacustrine sedimentation: Origin and paleoenvironmental significance of homogenites in karstic Lake Banyoles (NE Spain)
dc.creator.none.fl_str_mv Morellón, Mario
Anselmetti, Flavio S.
Valero Garcés, Blas Lorenzo
Giralt Romeu, Santiago
Ariztegui, Daniel
Sáez, Alberto
Mata, M. Pilar
Barreiro-Lostres, Fernando
Rico, Mayte
Moreno, Ana
author Morellón, Mario
author_facet Morellón, Mario
Anselmetti, Flavio S.
Valero Garcés, Blas Lorenzo
Giralt Romeu, Santiago
Ariztegui, Daniel
Sáez, Alberto
Mata, M. Pilar
Barreiro-Lostres, Fernando
Rico, Mayte
Moreno, Ana
author_role author
author2 Anselmetti, Flavio S.
Valero Garcés, Blas Lorenzo
Giralt Romeu, Santiago
Ariztegui, Daniel
Sáez, Alberto
Mata, M. Pilar
Barreiro-Lostres, Fernando
Rico, Mayte
Moreno, Ana
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sediments lacustres
Pla de l'Estany (Catalunya)
Lake sediments
Pla de l'Estany (Catalonia)
topic Sediments lacustres
Pla de l'Estany (Catalunya)
Lake sediments
Pla de l'Estany (Catalonia)
description Banyoles (42°08′N, 2°45′E) is the largest and deepest lake of karstic<br>tectonic origin in the Iberian Peninsula. The lake comprises two basins and six sub-circularly shaped sub-basins fed by subaquatic springs. Periods of intense groundwater inflow in the deepest sub-basins lead to the fluidization and re-suspension of previously deposited sediments and subsequent settling forming homogenite deposits on the southern basin intermediate platforms. The multiproxy analysis of sediment cores combined with high resolution seismic stratigraphy (3.5 kHz pinger and multi-frequency Chirp surveys) allows a precise reconstruction of depositional environments and related hydrological variability and groundwater inflowduring the last ca. 7.6 cal kyr BP. According to the agemodel based on 137Cs, 210Pb and AMS 14C dating, homogenite deposition occurred between 7.2 and 5.5 cal kyr BP, stopped during the middle Holocene (5.5<br>2.8 cal kyr BP) and greatly increased during the last two millennia with a total of 17 homogenite layers individually up to 75 cm-thick. The onset of this unique sedimentation mode at ca. 3 cal kyr BP coincides with an increase in lake level, evidenced by the onlapping of fine-grained, distal sediments over coarser massive, carbonate-rich, littoral deposits. A detailed, multidisciplinary study of the homogenites (sedimentology, physical properties, high-resolution elemental geochemistry, mineral composition, grain-size, organic matter content and SEM) combined with seismic stratigraphy demonstrates that the fluidization events triggering the formation of the homogenites were caused by higher and more intense local groundwater inflow, related to increased rainfall during the Late Holocene and likely intensified by land use changes during the last millennium.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/59545
url https://hdl.handle.net/2445/59545
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://doi.org/10.1016/j.sedgeo.2014.07.004
Sedimentary Geology, 2014, vol. 311, p. 96-111
http://doi.org/10.1016/j.sedgeo.2014.07.004
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 16 p.
application/pdf
dc.publisher.none.fl_str_mv University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics
publisher.none.fl_str_mv University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869416306011275264
score 15,81155

Similares en LA Referencia