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Facies and sequence analysis of Miocene open-shelf warm-temperate carbonates in Portimão (Lagos-Portimão Formation, Portugal)

2019-07-01Artigo científico Acesso aberto
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dc.contributor.authorArmenteros, I.
dc.contributor.authorDabrio, C. J.
dc.contributor.authorLegoinha, P.
dc.contributor.authorGonzález-Delgado, J. A.
dc.contributor.authorMartínez-Graña, A.
dc.contributor.authorAlonso-Gavilán, G.
dc.contributor.authorCivis, J.
dc.contributor.authorPais, J.
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.institutionDCT - Departamento de Ciências da Terra
dc.contributor.pblSpringer Science Business Media
dc.date.accessioned2019-07-29T22:40:00Z
dc.date.available2022-02-19T01:30:51Z
dc.date.embargoedUntil2020-05-24
dc.date.issued2019-07-01
dc.descriptionKBHV/463AC01,CGL2009-11539 SFRH/BSAB/128044/2016 CGL2014-54818-P
dc.description.abstractThe Lower–Middle Miocene Lagos-Portimão Formation at Portimão, southern Portugal, consists of three main heterozoan carbonate facies: mollusc-rich rudstone in a matrix of skeletal packstone/grainstone (MR), fine-to-medium skeletal packstone/grainstone (SPG), and quartz-rich skeletal packstone (QSP). These facies occur in different arrangements and indicate deposition on a wave-dominated open shelf with a well-established heterozoan fauna, most likely related to increased trophic resources where continent supply and upwelling contributed nutrients. These facies form belts inferred to have lain roughly parallel to the strike lines of the shelf, with the MR occupying the more landward, shallower areas and the SPG and QSP extending progressively offshore on the open shelf. Bryozoan abundance in the QSP facies indicates a deep setting on the middle/outer shelf, whereas the absence of rhodalgal components is attributed to a combination of temperature decrease and seafloor eutrophication during the late Langhian and Serravallian, coeval with the “Middle Miocene climatic cooling”. The large photosymbiont-bearing foraminifers and the absence of calcareous algae and zooxanthellate corals point to deposition under warm-temperate conditions. Two main orders of cyclicity are present. Small-scale sequences, 40–60 cm thick, may represent minor sea-level changes related to fifth-order sequences modulated by (~ 100-kyr) eccentricity forcing. Six large-scale sequences, 3–9 m in thickness, are recognized. Based on LAD and FAD of planktic foraminifers and the occurrence of two erosive surfaces related to major sea-level falls (Lang2/Ser1 and Ser4/Tor1), five Miocene sequences (Bu, L1, S1, S2, and S3) are correlated with third-order eustatic cycles.en
dc.description.versionauthorsversion
dc.description.versionpublished
dc.format.extent10449169
dc.identifier.doi10.1007/s10347-019-0575-2
dc.identifier.issn0172-9179
dc.identifier.otherPURE: 13701953
dc.identifier.otherPURE UUID: 317c8011-8e58-4f31-aad7-ad73f1e12096
dc.identifier.otherScopus: 85066251191
dc.identifier.otherWOS: 000469019700001
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85066251191&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85066251191
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147458/PT
dc.subjectBurdigalian
dc.subjectCyclicity
dc.subjectHeterozoan carbonates
dc.subjectLagos-Portimão Formation
dc.subjectLanghian
dc.subjectOpen shelf
dc.subjectSerravallian
dc.subjectWarm-temperate waters
dc.subjectGeology
dc.subjectStratigraphy
dc.subjectPalaeontology
dc.subjectSDG 14 - Life Below Water
dc.titleFacies and sequence analysis of Miocene open-shelf warm-temperate carbonates in Portimão (Lagos-Portimão Formation, Portugal)en
dc.typejournal article
degois.publication.issue3
degois.publication.titleFacies
degois.publication.volume65
dspace.entity.typePublication
oaire.awardNumberUID/GEO/04035/2013
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FGEO%2F04035%2F2013/PT
oaire.fundingStream5876
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublicationc5452a5b-10e2-4e65-9959-4e7497da5c39
relation.isProjectOfPublication.latestForDiscoveryc5452a5b-10e2-4e65-9959-4e7497da5c39

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