Mostrar el registro sencillo del ítem

dc.contributor.authorBenites, Susanapt_BR
dc.contributor.authorSommer, Carlos Augustopt_BR
dc.contributor.authorLima, Evandro Fernandes dept_BR
dc.contributor.authorSavian, Jairo Franciscopt_BR
dc.contributor.authorHaag, Maurício Barcelospt_BR
dc.contributor.authorMoncinhatto, Thiago Ribaspt_BR
dc.contributor.authorTrindade, Ricardo Ivan Ferreira dapt_BR
dc.date.accessioned2021-04-27T04:33:56Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn0001-3765pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/220249pt_BR
dc.description.abstractThe Paraná-Etendeka Magmatic Province is associated with the distensive tectonics that caused the rupture of the Gondwana continent during the Lower Cretaceous and generated an intense volcanism that covers South America and the NW portion of Namibia in Africa. In Brazil, this volcanic sequence is named Serra Geral Group and predominantly consists of basalts and subordinated silicic rocks. The goal of this study is to characterize the geomorphological features observed in the Aparados da Serra region, southern Brazil, and to evaluate the relationship between these structures and the primary silicic volcanic structures. The geomorphological features were fi rst identifi ed using remote sensing and then correlated with fl ow structures observed in the fi eld, as well as petrographic and geochemical data. AMS data were used to determine magnetic patterns and the direction of magmatic fl ow of the rocks. Despite the low degree of anisotropy, clear patterns of lineation and foliation were identifi ed in the studied rocks. Our data shows that Units I and II correspond to silicic lava fl ows linked to effusive fi ssure eruptions, presenting a dome morphology caused by differential erosion. Unit III rocks may correspond to true volcanic domes, whereas the Unit IV corresponds to the effusive feeder structures.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAnais da Academia Brasileira de Ciências. Vol. 92, n. 2 (Mar. 2020), e20180981pt_BR
dc.rightsOpen Accessen
dc.subjectAnisotropy of magnetic susceptibilityen
dc.subjectProcessamento de imagenspt_BR
dc.subjectSensoriamento remoto : Geologiapt_BR
dc.subjectSilicic lavasen
dc.subjectVolcanic morphologiesen
dc.titleCharacterization of volcanic structures associated to the silicic magmatism of the Paraná-Etendeka Province, in the Aparados da Serra region, southern Brazilpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001123520pt_BR
dc.type.originEstrangeiropt_BR


Ficheros en el ítem

Thumbnail
   

Este ítem está licenciado en la Creative Commons License

Mostrar el registro sencillo del ítem