Controles geológicos das jazidas de granitos ornamentais da região de Encruzilhada do Sul: origem das variedades comerciais do granito Encruzilhada do Sul

• Autor(a) principal: Philipp, Ruy Paulo
• Data de Publicação: 2005
• Outros Autores: Campos, Roberto Sacks de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/22611
• topic: Granitos; Granito : Encruzilhada do Sul (RS); Granite; Industrial Granite; Encruzilhada do Sul Granite

In 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.