The Carreira Comprida Anorthosite (CCA) is exposed in the Paleoproterozoic Porto Nacional High-Grade Metamorphic Terrene, in the north of the Goiás Massif, central Brazil, represented by an ancient pluton affected by late Neoproterozoic tectonics, with protoliths predominantly of anorthosite consisting of more than 85% labradorite (An60-65), with subordinate presence of clinopyroxene, quartz, hornblende and garnet. There is evidence of intrusive relationships in paragneisses country rocks of the Morro do Aquiles Formation, due to the effects of high-temperature contact metamorphism (∼750 °C) that reached the hornblende hornfels facies. Features of a magmatic nature are present as a cumulate texture formed by the accumulation of tabular plagioclase megacrystals by flotation associated with gravitational action due to the difference in magma density and magmatic flow, with clinopyroxene and interstitial (intercumulated) quartz, during the emplacement of the pluton and crystallization of magma. At the end of the Neoproterozoic, the body was affected by the tectonics of the transcontinental strike-slip system of the Transbrasiliano Lineament (Porto Nacional Transcurrent Shear Zone). U–Pb dating on igneous zircon crystals indicated an age of 2084 ± 4 Ma, which represents the age of emplacement of the Carreira Comprida Anorthosite in the Rhyacian, characterizing an event of gabbroic-anorthosite magmatism not known in the Goiano Massif. Lu–Hf isotopic data show variable εHf (2.08 Ga) values ranging from −1.3 to +4.5 and Hf-TDMC model ages with two crust formation episodes, one from the Siderian (2.46 - 2.38 Ga) and another in Neoarchean (2.74 - 2.59 Ga) which indicates that their parental magmas were derived from a depleted mantle source and range in composition from uncontaminated to variably contaminated by pre-existing older crust in the formation of the CCA. Considering that the ages of the Hf-TDMC model are similar to those of the orthogranulites from the Porto Nacional Complex, its indication as a possible source of the CCA is suggestive. Field relationships, primary structural features, petrographic and compositional data, geochronological and literature data suggest that the emplacement of the CCA is late-tectonic in relation to the evolution of the high-grade terrain of Porto Nacional, in the Rhyacian. After its crystallization, the CCA was affected by the tectonics of the dextral transcurrent system of the Transbrasiliano Lineament that implemented the Porto Nacional Shear Zone at the end of the Neoproterozoic, imposing strong deformation on the anorthosite and surrounding rocks, generating a variety of mylonites. These transformations generated a diversity of microstructures (stretch lineation, mylonitic foliation, tectonic banding, ribbon quartz, lentiform porphyroclasts, microshear, undulatory extinction, thinning of mechanical twinning, wedge twinning, deformation bands, mantle-core, subgrains, symplectites of garnet), which are suggestive of ductile tectono-metamorphic transformations that reached amphibolite facies conditions. Finally, the CCA is a rare example in Brazil of a massif-type anorthosite developed in the Paleoproterozoic (2.08 Ga). On the other hand, the Rhyacian granite bodies of the Ipueiras Suite (2.08 - 2.07 Ga) located very close to the anorthosite pluton are contemporary with the CCA, allowing them to be considered an association of the Anorthosite-Mangerite-Charnockite (AMC) type.