Thermobarometry and P-T path of metasedimentary rocks of the araxá group from goiás

Página do item simplificado
dc.contributor.authorNavarro, Guillermo Rafael Beltran [UNESP]
dc.contributor.authorZanardo, Antenor [UNESP]
dc.contributor.authorMontibeller, Cibele Carolina [UNESP]
dc.contributor.authorLeme, Thaís Güitzlaf [UNESP]
dc.contributor.authorDa Conceição, Fabiano Tomazini [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T08:28:37Z
dc.date.available2022-04-29T08:28:37Z
dc.date.issued2020-01-01
dc.description.abstractIn the southeastern region of Goiás state (Caldas Novas - Morrinhos - Rochedo region) outcrop psammitic, psamo-pelitic and pelitic metasediments related to the Araxá Group. In the Caldas Novas region (Caldas Novas Domain), the mineral associations related to the metamorphic peak are typical of the upper greenschist facies/lower amphibolite facies and the calculated metamorphic peak indicates temperatures between 500°C and 570°C and pressures between 7-8 kbar, kyanite zone. The mineral associations related to the metamorphic peak in the region between Marcelândia - Morrinhos - Rochedo (Araxá West Domain) are typical of medium to upper amphibolite facies and the thermobarometric calculations show metamorphic peak at 600°C - 670°C and 9-11 kbar, under conditions of amphibolite facies, kyanite zone. The calculations with the geothermometer Zr-in-Rt, performed for pressures of 10 kbar, indicate a minimum temperature of 527°C and a maximum of 688°C. The P-T path, inferred based on textural and thermobarometric data, is clockwise. The mineral associations observed in congruence with mineral chemistry analyzes and thermobarometric studies suggest a progressive metamorphic zoning from E to W in the Araxá Group in the Caldas Novas - Morrinhos - Rochedo region. However, the thermobarometric data suggest that the sets have different metamorphic histories and that metamorphic zoning is a result of tectonic structuring.en
dc.description.affiliationInstituto de Geociências e Ciências Exatas Departamento de Petrologia e Metalogenia Universidade Estadual Paulista
dc.description.affiliationInstituto de Geociências e Ciências Exatas Departamento de Planejamento Territorial e Geoprocessamento Universidade Estadual Paulista
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Departamento de Petrologia e Metalogenia Universidade Estadual Paulista
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Departamento de Planejamento Territorial e Geoprocessamento Universidade Estadual Paulista
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2013/04235-2
dc.format.extent315-330
dc.identifier.citationGeociencias, v. 38, n. 2, p. 315-330, 2020.
dc.identifier.issn1980-900X
dc.identifier.issn0101-9082
dc.identifier.scopus2-s2.0-85083693906
dc.identifier.urihttp://hdl.handle.net/11449/228788
dc.language.isopor
dc.relation.ispartofGeociencias
dc.sourceScopus
dc.subjectAraxá group
dc.subjectBrasília belt
dc.subjectMineral chemistry
dc.subjectThermobarometry
dc.titleThermobarometry and P-T path of metasedimentary rocks of the araxá group from goiásen
dc.titleTermobarometria e trajetória P-T de metassedimentos do grupo araxá em goiáspt
dc.typeArtigo

Arquivos

Coleções

Artigos - Petrologia e Metalogenia - IGCE
Artigos - Planejamento Territorial e Geoprocessamento - IGCE