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The region around the District ofOuro Fino (Conceição do Mato Dentro, MG) is located on the southeastern bord er of the Espinhaço mountain range, where granite-gneíssíc (Basal Com plex) and Iow grade rnetasedimentary rocks can be found (Meta sedimentary Sequences I and II). Fine to coarse c1astic rocks (phyll ítes, quar tzites, metacon glomerates) dominate in these sequences. Basic metavolcanic rocks are less frequento The rocks in this region are intensively defonned showing a strong tangenci al , with mass transport from east to west shown by the general recronic struc tures, syn-mylonitic foliation paralleI to So' and also by smaller struc tures like pressure shadows, geain rotation, S and C surfaces, stretching Iineation, among oth ers. The type of the deformation is non-coaxial and heterogeneou s. Th e tectoni c stacking of similar stratigraphic uniti es, individuali zed by slices of gneissic mylonitic rocks, charac terize struc tures fonned by nap pe-tectonics.

In the Itacambira-Monte Azul block (BIMA) the Archean rocks are represented by tonalite-trondhjemite-granodiorite (TTGs) of the

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