Metamorphic map of rocks of Carrancas Group in the region of Carrancas, Bicas and Moleque Hills, southern Minas Gerais

• Grant number: 09/14209-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2009
• End date: October 31, 2010
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Renato de Moraes
• Grantee: Lígia Liz Sanvezzo Garcia
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The Carrancas Group os divided in two formations, São Tomé das Letras and Campestre. The first is dominated by quartzites and the second by quartzite and schist alternation. Previous metamorphic maps have small detail over rocks croping out on Carrancas, Bicas and Moleque hills. Schists of Campestre Formation are richer in Al2O3, and plot above garnet-chlorite tie line and metamorphic zones observed in this kind of rocks are different from classical barrovian type. This allows to infer more isograds and zones, producing a more detailed metamorphic map. The metamorphic evolution for Carrancas Group is the main subject of this project, as well as the relationship between metamorphism and deformation. P-T conditions will be determined with thermobarometry for four samples, at least, covering the geographic extremes of investigates area