Geologic control of ornamentals granitic jaziments of Encruzilhada do Sul region, RS: origin of comercial varieties of Encruzilhada do Sul Granite

Controles Geológicos das Jazidas de Granitos Ornamentais da Região de Encruzilhada do Sul, RS: Origem das Variedades Comerciais do Granito Encruzilhada do Sul

dc.contributoren-US
dc.contributorpt-BR
dc.creatorPHILIPP, RUY PAULO
dc.creatorDE CAMPOS, ROBERTO SACKS
dc.date2005-06-30
dc.date.accessioned2018-11-07T21:59:17Z
dc.date.available2018-11-07T21:59:17Z
dc.identifierhttps://seer.ufrgs.br/PesquisasemGeociencias/article/view/19537
dc.identifier10.22456/1807-9806.19537
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/2192308
dc.descriptionIn the region of Encruzinhada do Sul, it is common the exploration of three faciological varieties of Encruzilhada do Sul Granite: porphyritic, heterogranular coarse and heterogranular very coarse. These varieties are commercially known as Rosa Encruzilhada, Bege Pérola and Coral, respectively. The petrographic analyzes and spatial disposition of the studied types indicated that the textural variations identified present a pattern of lateral zoning and are related mainly to the cooling of the granitic body and secondly to the accumulation of K-feldspar. Porphyritic sieno to monzogranite represents the cooled edges of Encruzilhada granite on embasement metamorphic rocks of Várzea do Capivarita and Arroio dos Ratos complexes. The heterogranular coarse facies represent the core portion of the body and the heterogranular very coarse facies a central and basal of the magmatic chamber, indicated by the accumulation of K-feldspar, followed by the diminishing of plagioclase, quartz and biotite teors. Beyond that, the petrographyc analysis demonstrate that the chromatic variations found in each faciology are related to the state of granite alteration, with colour variations oscilating among white and gray (sane rock), light pink to orange (signs of incipient hydrothermal and weathering alteration) and tones from light brown to very light brown (notable weathering alteration).en-US
dc.descriptionIn the region of Encruzinhada do Sul, it is common the exploration of three faciological varieties of Encruzilhada do Sul Granite: porphyritic, heterogranular coarse and heterogranular very coarse. These varieties are commercially known as Rosa Encruzilhada, Bege Pérola and Coral, respectively. The petrographic analyzes and spatial disposition of the studied types indicated that the textural variations identified present a pattern of lateral zoning and are related mainly to the cooling of the granitic body and secondly to the accumulation of K-feldspar. Porphyritic sieno to monzogranite represents the cooled edges of Encruzilhada granite on embasement metamorphic rocks of Várzea do Capivarita and Arroio dos Ratos complexes. The heterogranular coarse facies represent the core portion of the body and the heterogranular very coarse facies a central and basal of the magmatic chamber, indicated by the accumulation of K-feldspar, followed by the diminishing of plagioclase, quartz and biotite teors. Beyond that, the petrographyc analysis demonstrate that the chromatic variations found in each faciology are related to the state of granite alteration, with colour variations oscilating among white and gray (sane rock), light pink to orange (signs of incipient hydrothermal and weathering alteration) and tones from light brown to very light brown (notable weathering alteration).pt-BR
dc.formatapplication/pdf
dc.languagepor
dc.publisherInstituto de Geociências /Universidade Federal do Rio Grande do Sulpt-BR
dc.relationhttps://seer.ufrgs.br/PesquisasemGeociencias/article/view/19537/pdf
dc.sourcePesquisas em Geociências; v. 32, n. 1 (2005): Pesquisas em Geociências; 37-49pt-BR
dc.source1807-9806
dc.source1518-2398
dc.subjecten-US
dc.subjectGranite, Industrial Granite, Encruzilhada do Sul Granite.en-US
dc.subjectpt-BR
dc.subjectGranite; Industrial Granite; Encruzilhada do Sul Granite.pt-BR
dc.subjectGeociênciaspt-BR
dc.titleGeologic control of ornamentals granitic jaziments of Encruzilhada do Sul region, RS: origin of comercial varieties of Encruzilhada do Sul Graniteen-US
dc.titleControles Geológicos das Jazidas de Granitos Ornamentais da Região de Encruzilhada do Sul, RS: Origem das Variedades Comerciais do Granito Encruzilhada do Sulpt-BR
dc.typeArtículos de revistas
dc.typeArtículos de revistas
dc.coverageEncruzilhada do Sul;Rio Grande do Sul;Brasilpt-BR
dc.coveragept-BR
dc.coveragept-BR


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