The Cambaí Complex TTG-like rock assemblage representing a Neoproterozoic juvenile magmatic arc is part of the São Gabriel Terrane that crops out in the SW domain of the Dom Feliciano Belt in S-Brazil. Geochemistry of dioritic, tonalitic, trondhjemitic, and granodioritic rocks of this complex indicate their low-medium-K calc-alkaline geochemical affinity being metaluminous and with fractional crystallization as the main magmatic process of formation. Whole-rock geochemistry enrichment in LILE as Sr and Ba in relations to HFSE as Y and Zr, with flat patterns in an REE spider diagram, with enrichment to chondrite ((La/Yb) N = 1.3 to 17.2) and low Eu anomaly (Eu/Eu* = 1.2), with ⁸⁷Sr/⁸⁶Sr_(i) from 0.704260 to 0.706430, ¹⁴³Nd/¹⁴⁴Nd_(t) from 0.512070 to 0.512080, Nd-T_DM model age from 820 to 852 Ma, εNd_(t) from 3.9 to 4.2 and ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁶Pb/²⁰⁴Pb ranged from 15.5040 to 15.5776 and 17.5313 to 18.5696, suggest an immature magmatic arc-related rock setting. Geochronology U–Pb LA-ICP-MS in zircons from diorites shown Tonian crystallization ages (745 ± 4 Ma, 748 ± 5 Ma, 752 ± 4 Ma). Any model proposed to explain the history of the evolution of the West Gondwana Supercontinent needs to consider the accretion of juvenile crust from primitive mantle source with minor crustal contamination in this segment of the orogenic collage during the Neoproterozoic.

代表新元古代幼岩浆弧的CambaíComplex TTG样岩石组合是SãoGabriel Terrane的一部分，该地块生长在巴西南部Dom Feliciano Belt的SW域中。该复合物的闪长岩，眼泥岩，长生硬岩和花岗闪长岩的地球化学表明它们的中低钾钙碱性地球化学亲和力是金属的，分步结晶是主要的岩浆形成过程。LILE的全岩石地球化学富集为Sr和Ba，而HFSE为Y和Zr，在REE蜘蛛图中呈扁平状，富集球粒晶（（La / Yb）N = 1.3至17.2）和低Eu异常（欧洲/欧洲* = 1.2）中，用⁸⁷ SR / ⁸⁶的Sr _（ⅰ）从0.704260至0.706430，¹⁴³的Nd /¹⁴⁴ Nd _（t）从0.512070至0.512080，Nd-T _DM模型年龄从820至852 Ma，εNd _（t）从3.9至4.2和²⁰⁷ Pb / ²⁰⁴ Pb和²⁰⁶ Pb / ²⁰⁴ Pb从15.5040至15.5776和17.5313至18.5696，提出了与岩浆弧有关的未成熟岩石背景。从闪长岩中发现的锆石中的U-Pb LA-ICP-MS年代学表明Tonian的结晶年龄为（745±4 Ma，748±5 Ma，752±4 Ma）。提议用来解释西冈瓦纳超大陆演化历史的任何模型都需要考虑在新元古代的这一段造山运动中，原始地幔源中的地壳有少量地壳污染。