Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island

[EN] Paleocollapse structures and collapse breccias are one of the major features for paleokarst analysis and paleoclimate record. These are affecting the Llucmajor and Santanyí carbonate platforms. These platforms, of southern and eastern Mallorca respectively, are a good example of progradation re...

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Autores: Robledo Ardila, Pedro Agustín, Durán Valsero, Juan José, Pomar, L.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2004
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/376281
Acesso em linha:http://hdl.handle.net/10261/376281
Access Level:acceso abierto
Palavra-chave:Breccias
Paleoclimate
Paleocollapse
Paleocave
Upper Miocene
Mallorca
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spelling Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca IslandRobledo Ardila, Pedro AgustínDurán Valsero, Juan JoséPomar, L.BrecciasPaleoclimatePaleocollapsePaleocaveUpper MioceneMallorca[EN] Paleocollapse structures and collapse breccias are one of the major features for paleokarst analysis and paleoclimate record. These are affecting the Llucmajor and Santanyí carbonate platforms. These platforms, of southern and eastern Mallorca respectively, are a good example of progradation reef platform in the western Mediterranean. The Santanyí platform is constituted of two sedimentary units, both affected by paleocollapse structures: (1) The Reef Complex attributed to the upper Tortonian-lower Messinian; (2) Santanyí Limestone attributed to the Messinian. There are abundant paleocollapse outcropping in the Reef Complex and Santanyí Limestone units. These structures have been produced by roof collapse of caverns developed in the underlying reefal complex. According to the genetic model, the origin of same paleocollapse structures may be related to early diagenetic processes controlled by high-frequency sea-level fluctuations. During the lowstands of sea level, fresh water flow or mixing zone might have created a cave system near the water table by dissolution of aragonite in the reef front facies and coral patches existing in the lagoonal beds. During subsequent rise and highstands of sea level, inner-shelf beds overlaid the previously karstified reef-core and outer-lagoonal beds. Increase of loading by subsequent accretion of the shallow-water carbonate might have produced paleocollapse structures by gravitational collapse of cave roof. Morphometric and structural classification of paleocollapse is based on geometric and structural criteria according to the type of deformed strata and strata dip. Paleocollapse structures can be classified according to geometric section, size of the paleocave and lithification degree of the host rock when collapsed. Breccias are classified as crackle, mosaic and chaotic types. In same paleocollapse the type of breccias present a vertical and lateral gradation, from crackle in the upper part, to chaotic in the lower part of the paleocollapse. Chaotic breccias grade from matrix-free, clasts-supported breccias to matrix-supported breccias. Relationship with high frequency of sea-level fluctuation, facies architecture, classification features and products permit to enhance a general paleoclimatic framework.The work was supported by the Research Project DGI n. BTE2001 - 0372-C02 (Spain) and 448 GTE of the PICG (UNESCO).Peer reviewedInternational Union of SpeleologyMinisterio de Educación y Cultura (España)UNESCORobledo Ardila, Pedro Agustín [0000-0002-1875-2791]Durán Valsero, Juan José [0000-0002-6965-2280]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252004info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/376281reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement///BTE2001-0372-C02http://dx.doi.org/10.5038/1827-806X.33.1.8Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3762812026-05-22T06:33:51Z
dc.title.none.fl_str_mv Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
title Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
spellingShingle Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
Robledo Ardila, Pedro Agustín
Breccias
Paleoclimate
Paleocollapse
Paleocave
Upper Miocene
Mallorca
title_short Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
title_full Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
title_fullStr Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
title_full_unstemmed Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
title_sort Paleocollapse structures as geological record for reconstruction of past karst processes during the Upper Miocene of Mallorca Island
dc.creator.none.fl_str_mv Robledo Ardila, Pedro Agustín
Durán Valsero, Juan José
Pomar, L.
author Robledo Ardila, Pedro Agustín
author_facet Robledo Ardila, Pedro Agustín
Durán Valsero, Juan José
Pomar, L.
author_role author
author2 Durán Valsero, Juan José
Pomar, L.
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Educación y Cultura (España)
UNESCO
Robledo Ardila, Pedro Agustín [0000-0002-1875-2791]
Durán Valsero, Juan José [0000-0002-6965-2280]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Breccias
Paleoclimate
Paleocollapse
Paleocave
Upper Miocene
Mallorca
topic Breccias
Paleoclimate
Paleocollapse
Paleocave
Upper Miocene
Mallorca
description [EN] Paleocollapse structures and collapse breccias are one of the major features for paleokarst analysis and paleoclimate record. These are affecting the Llucmajor and Santanyí carbonate platforms. These platforms, of southern and eastern Mallorca respectively, are a good example of progradation reef platform in the western Mediterranean. The Santanyí platform is constituted of two sedimentary units, both affected by paleocollapse structures: (1) The Reef Complex attributed to the upper Tortonian-lower Messinian; (2) Santanyí Limestone attributed to the Messinian. There are abundant paleocollapse outcropping in the Reef Complex and Santanyí Limestone units. These structures have been produced by roof collapse of caverns developed in the underlying reefal complex. According to the genetic model, the origin of same paleocollapse structures may be related to early diagenetic processes controlled by high-frequency sea-level fluctuations. During the lowstands of sea level, fresh water flow or mixing zone might have created a cave system near the water table by dissolution of aragonite in the reef front facies and coral patches existing in the lagoonal beds. During subsequent rise and highstands of sea level, inner-shelf beds overlaid the previously karstified reef-core and outer-lagoonal beds. Increase of loading by subsequent accretion of the shallow-water carbonate might have produced paleocollapse structures by gravitational collapse of cave roof. Morphometric and structural classification of paleocollapse is based on geometric and structural criteria according to the type of deformed strata and strata dip. Paleocollapse structures can be classified according to geometric section, size of the paleocave and lithification degree of the host rock when collapsed. Breccias are classified as crackle, mosaic and chaotic types. In same paleocollapse the type of breccias present a vertical and lateral gradation, from crackle in the upper part, to chaotic in the lower part of the paleocollapse. Chaotic breccias grade from matrix-free, clasts-supported breccias to matrix-supported breccias. Relationship with high frequency of sea-level fluctuation, facies architecture, classification features and products permit to enhance a general paleoclimatic framework.
publishDate 2004
dc.date.none.fl_str_mv 2004
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/376281
url http://hdl.handle.net/10261/376281
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement///BTE2001-0372-C02
http://dx.doi.org/10.5038/1827-806X.33.1.8
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv International Union of Speleology
publisher.none.fl_str_mv International Union of Speleology
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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