Archean and Paleoproterozoic basement rocks are exposed in the Araguaia Belt, a Neoproterozoic orogen bordering the eastern portion of the Amazonian Craton. Zircon LA-MC-ICPMS U-Pb and Lu-Hf isotopic systematics allowed a more accurate dating of the basement rocks and investigating the evolution of this large Archean/Paleoproterozoic crustal segment and discuss the relationship with the southeastern Amazonian Craton. Archean TTG orthogneisses (2.93 to 2.87 Ga) prevail in the northern belt while distinct magmatic events generated their protoliths in approximately 60 Ma. Zircon Hf model ages (~3.0 to 3.4 Ga) and Ɛ_{Hf(2.87-2.93)} from −4.3 to +5.3 suggest crustal reworking of Mesoarchean juvenile sources, with the subordinated contribution of older crust. A Mesoarchean source is also indicated by the Hf model ages (2.93–3.25 Ga) and Ɛ_{Hf(−1.86 Ga)} from −4.8 to −1.6 of a 1.86 Ga granitic gneiss intrusive in the Archean TTG. An orthogneiss and an intrusive granitoid from southern segment of the belt were dated 2.06 Ga and 1.87 Ga, respectively. The Hf model ages (2.65–2.86 Ga) determined for these rocks, the Ɛ_{Hf(-2.06 Ga)} (−4.8 to −1.6) for the orthogneiss and the Ɛ_{Hf(1.87 Ga)} (−15.8 to −9.7) found for the granitoid reveal a dominant crustal source for the southern basement rocks. The Archean and Paleoproterozoic basement constituted a single crustal segment by the Orosirian, since both segments present intrusive granites of this geological period. The Archean orthogneisses of the Araguaia Belt and the granitoids of the Carajás Province Mesoarchean domains in southeastern Amazonian Craton share some similarities, such as the TTG affinity magmatism formed in a relatively similar time interval, the Orosirian intrusive granites, and the Mesoarchean juvenile source. Therefore, the basement rocks cropping out in the northern segment of the Araguaia Belt may represent portions of the adjacent Amazonian Craton.

太古宙和古元古代基底岩石暴露于阿拉瓜地带，这是与亚马逊克拉通东部接壤的新元古代造山带。Zircon LA-MC-ICPMS U-Pb和Lu-Hf同位素系统可以对基底岩石进行更精确的年代测定，并研究这个大型的太古宙/古生代地壳段的演化，并讨论与东南亚马孙克拉通的关系。太古宙TTG片麻片（2.93至2.87 Ga）在北部地带盛行，而明显的岩浆事件在大约60 Ma产生了原生岩。Zircon Hf模型年龄（〜3.0至3.4 Ga）和ƐHf _{（2.87-2.93）}从−4.3到+5.3表示对Mesoarchean少年源进行了地壳改造，并伴有旧地壳的次要贡献。Mesoarchean来源也由太古代TTG中1.86 Ga花岗岩片麻岩侵入体的Hf模型年龄（2.93-3.25 Ga）和_{Hf（-1.86 Ga）}从-4.8到-1.6指示。来自该带南段的直生片麻岩和侵入性花岗岩体的日期分别为2.06 Ga和1.87 Ga。对这些岩石确定的Hf模型年龄（2.65-2.86 Ga），对正长片麻岩确定ƐHf _{（-2.06 Ga）}（- 4.8至-1.6），对Hf模型年龄确定model _{Hf（1.87 Ga）}花岗岩中发现的（-15.8至-9.7）揭示了南部基底岩石的主要地壳来源。太古宙和古元古代基底由奥罗西期构成了一个单一的地壳部分，因为这两个部分都具有该地质时期的侵入性花岗岩。Araguaia带的太古宙斜长岩和亚马孙克拉通东南部的Carajás省Mesoarchean域的花岗岩类具有某些相似性，例如在相对相似的时间间隔内形成的TTG亲和岩浆，Orosirian侵入性花岗岩和Mesoarchean幼岩源。因此，在Araguaia带北段播种的基底岩可能代表了相邻的Amazonian Craton的一部分。