The Transbrasilian Lineament is a tectono-structural element characterized by transcurrent transcontinental expression that occurs from Paraguay and Argentina, through a great region in Brazil, and has continuity in the African continent, approximately 4,000 km long and was formed during the end of the Neoproterozoic, by the amalgamation of several continental masses and microcontinents. In the Borborema Province, the Sobral-Pedro II Lineament constitutes an important morphostructural feature with orientation N38E, being an important LTB segment that separates the regions of the Middle East and Central Ceará. The structural, microstructural and petrographic studies allow the identification of different types of rocks, such as granulites, orthogneisses, paragneisses, micaxies and granitoids of varied composition that are cut out by this structure, where low to medium dip angles foliations were transposed by mylonitic foliations of high angle of dip with sub-horizontal mineral lineage stretch. The main associated microstructures, besides the anastomosed mylonitic foliation, are the core-and-mantle structures, porphyroclasts of type σ and δ, shear bands of type S-C ', fish type structures, fragmented porphyroclasts domino type, and aspects related to recrystallization of quartz and feldspars by low temperature BLG (Bulging), SGR (Subgrain Rotation) and GBM (High Temperature Grain Boundary Migration) systems. The shear direction indicators at mesoscopic and microscopic scale converge for a dextral predominant kinematics. The rocks have paragenesis that indicate conditions of amphibolite facies of high temperature to granulite, transformed in conditions of medium to high amphibolite facies during dynamic metamorphism, generating medium and high grade mylonites.
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