PETROLOGIA DO GRUPO SERIDÓ; CURRAIS NOVOS - PARELHAS (RN)
PETROLOGIA DO GRUPO SERIDÓ; CURRAIS NOVOS - PARELHAS (RN)
| dc.contributor | en-US | |
| dc.contributor | pt-BR | |
| dc.creator | GAMA JÚNIOR, THEODOMIRO | |
| dc.creator | ALBUQUERQUE, CARLOS ALBERTO RIBEIRO DE | |
| dc.date | 2018-04-27 | |
| dc.date.accessioned | 2022-12-15T20:29:46Z | |
| dc.date.available | 2022-12-15T20:29:46Z | |
| dc.identifier | https://ppegeo.igc.usp.br/index.php/rbg/article/view/12092 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5361269 | |
| dc.description | This work deals with the metamorphism of the Seridó schists in the region Currais Novos-Parelhas, of the Seridó schist belt. The study involved the petrography of the rocks, the chemistry of rocks and selected minerals and the aplication of geothermometers and geobarometers. The pressure and temperature of crystallization can be estimated at approximately 4.5 kb and 560ºC, respectively. The occurence of staurolite in metasedimentary assemblages defines metamorphic conditions of the amphibolite facies. Garnet, with about 70% of the almandine molecule and 15% of the spessartite molecule, coexists with cordierite and andalusite (or sillimanite). Therefore, the metamorphism is of the low-to-intermediate pressure type. The grade of metamorphism is almost constant in the region studied, without evidence of retrograde mctamorphism. The conditions of metamorphism of this part of the Seridó schist belt can be compared to those of the Abukuma belt of Japan. The metasedimentary rocks were derived from sediments dominantly with a composition corresponding to a mixture of polite and greywacke. | en-US |
| dc.description | This work deals with the metamorphism of the Seridó schists in the region Currais Novos-Parelhas, of the Seridó schist belt. The study involved the petrography of the rocks, the chemistry of rocks and selected minerals and the aplication of geothermometers and geobarometers. The pressure and temperature of crystallization can be estimated at approximately 4.5 kb and 560ºC, respectively. The occurence of staurolite in metasedimentary assemblages defines metamorphic conditions of the amphibolite facies. Garnet, with about 70% of the almandine molecule and 15% of the spessartite molecule, coexists with cordierite and andalusite (or sillimanite). Therefore, the metamorphism is of the low-to-intermediate pressure type. The grade of metamorphism is almost constant in the region studied, without evidence of retrograde mctamorphism. The conditions of metamorphism of this part of the Seridó schist belt can be compared to those of the Abukuma belt of Japan. The metasedimentary rocks were derived from sediments dominantly with a composition corresponding to a mixture of polite and greywacke. | pt-BR |
| dc.format | application/pdf | |
| dc.language | por | |
| dc.publisher | Sociedade Brasileira de Geologia | pt-BR |
| dc.relation | https://ppegeo.igc.usp.br/index.php/rbg/article/view/12092/11637 | |
| dc.rights | Direitos autorais 2018 Revista Brasileira de Geociências | pt-BR |
| dc.source | Revista Brasileira de Geociências; v. 15, n. 2 (1985); 131-138 | en-US |
| dc.source | Revista Brasileira de Geociências; v. 15, n. 2 (1985); 131-138 | es-ES |
| dc.source | Revista Brasileira de Geociências; v. 15, n. 2 (1985); 131-138 | pt-BR |
| dc.source | 0375-7536 | |
| dc.subject | en-US | |
| dc.subject | pt-BR | |
| dc.title | PETROLOGIA DO GRUPO SERIDÓ; CURRAIS NOVOS - PARELHAS (RN) | en-US |
| dc.title | PETROLOGIA DO GRUPO SERIDÓ; CURRAIS NOVOS - PARELHAS (RN) | pt-BR |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | pt-BR |