Tracking triggering mechanisms for soft-sediment deformation structures in the Late Cretaceous Uberaba Formation, Bauru Basin, Brazil

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dc.contributor.authorAlessandretti, Luciano
dc.contributor.authorWarren, Lucas Verissimo [UNESP]
dc.contributor.authorMartinho dos Santos, Mauricio Guerreiro
dc.contributor.authorVirga, Matheus Carvalho
dc.contributor.institutionUniversidade Federal de Uberlândia (UFU)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.date.accessioned2020-12-10T17:38:14Z
dc.date.available2020-12-10T17:38:14Z
dc.date.issued2020-01-01
dc.description.abstractSoft-sediment deformation (SSD) structures are widespread in the sedimentary record, and numerous triggering mechanisms can induce its development, including glaciation, earthquakes, overloading, ground-water fluctuations, and wave movement. The Late Cretaceous Uberaba Formation preserves SSD structures as small- and large-scale load casts and associated flame structures, pseudonodules, and convolute laminations observed in the contact of three well-defined intervals among fine- to coarse-grained lithic and conglomeratic sandstone with fine-grained arkose and mudstone beds. Based on the morphology of the SSD structures, sedimentary facies of the Uberaba Formation, and similarities with previous observations in the geological record and laboratory models, these features are assigned to liquefaction-fluidization processes as the major deformational mechanism triggered by seismic and aseismic agents. We propose that a deformation occurred just after the sedimentation triggered by seismic shock waves and overloading, induced by the sudden deposition of coarse-grained sandy debris on fine-grained sediments. Some of these structures can be classified as seismites, providing evidence of intraplate seismicity within the inner part of the South American Platform during the Late Cretaceous. This seismic activity is likely related to the uplift of the Alto Paranaiba High along reactivations of regional structures inherited from Proterozoic crustal discontinuities and coeval explosive magmatism of the Minas-Goias Alkaline Province.en
dc.description.affiliationUniv Fed Uberlandia, Uberlandia, MG, Brazil
dc.description.affiliationUniv Estadual Paulista, Rio Claro, SP, Brazil
dc.description.affiliationUniv Fed ABC, Santo Andre, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Rio Claro, SP, Brazil
dc.format.extent13
dc.identifierhttp://dx.doi.org/10.1590/2317-4889202020190100
dc.identifier.citationBrazilian Journal Of Geology. Sao Paulo: Soc Brasileira Geologia, v. 50, n. 1, 13 p., 2020.
dc.identifier.doi10.1590/2317-4889202020190100
dc.identifier.fileS2317-48892020000100308.pdf
dc.identifier.issn2317-4889
dc.identifier.scieloS2317-48892020000100308
dc.identifier.urihttp://hdl.handle.net/11449/195544
dc.identifier.wosWOS:000552419200001
dc.language.isoeng
dc.publisherSoc Brasileira Geologia
dc.relation.ispartofBrazilian Journal Of Geology
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectLate Cretaceous
dc.subjectsoft-sediment deformation structures
dc.subjectintraplate tectonism
dc.subjectseismicity
dc.subjectoverloading
dc.subjectBaum Basin
dc.titleTracking triggering mechanisms for soft-sediment deformation structures in the Late Cretaceous Uberaba Formation, Bauru Basin, Brazilen
dc.typeArtigo
dcterms.rightsHolderSoc Brasileira Geologia

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