The Novo Gosto amphibolites represent the oldest unit of the Canindé domain, a Neoproterozoic sequence located in the NW Sergipano Belt, southern Borborema Province, Brazil. The domain comprises an association of metavolcano-sedimentary rocks, gabbroic intrusions, bimodal magmatic rocks, and syn-to post-tectonic granitoids. Due to the lithostratigraphic and geochemical complexity of this domain, several controversial interpretations of the tectonic setting have been proposed over the years. The protholits of the Novo Gosto amphibolites are here classified as high Fe tholeiitic basalt type rocks. Three geochemical groups were identified: Group 1 is more depleted in incompatible elements and has a pattern similar to island arc basalts with HFSE depletion (Nb–Ta, Zr–Hf, weak Ti); Group 2 displays a pattern similar to Group 1, but with more evident anomalies (Nb–Ta, Ti) and varied enrichment in incompatible elements; Group 3 is more enriched in incompatible elements than Group 1 rocks, with the pattern being flatter with milder HFSE depletion (Nb–Ta, Zr–Hf, weak Ti, Y) and resembling a geochemical pattern slightly more enriched than E-MORB. Our results suggest an environment similar to the Ryukyu-Okinawa (Japan) and Kamchatka arc-back-arc (Russia) setting. LA-ICP-MS U–Pb zircon dating of one amphibolite sample resulted in a date of 743 ± 3 Ma and confirms the geological field relationships that indicate this unit to be the oldest in the domain. The new petrographic, geochemical, and isotopic data for the Novo Gosto amphibolites lead to the recognition of an ancient Neoproterozoic arc-back-arc system, a rare setting in the earlier phases of the Brasiliano Orogeny within the Borborema Province, which ended with the closure of the restricted Canindé sea and the associated Sergipano ocean at around 630 Ma.

Nogo Gosto两栖生物代表了Canindé域的最古老单元，Canindé域是位于巴西Borborema省南部NW Sergipano带的新元古代序列。该区域包括超火山沉积岩，辉长岩侵入体，双峰岩浆岩以及同构造至后构造花岗岩类的组合。由于该领域的岩石地层学和地球化学的复杂性，多年来提出了一些关于构造背景的有争议的解释。Nogo Gosto角闪石的原岩在这里被归类为高铁高铁玄武岩型岩石。确定了三个地球化学组：第1组中的不相容元素更多地被耗尽，并且具有类似于HFSE耗尽的岛弧玄武岩（Nb-Ta，Zr-Hf，弱Ti）的模式。第2组显示的模式类似于第1组，但异常现象（Nb-Ta，Ti）更为明显，不相容元素的富集程度各不相同；与第1组岩石相比，第3组的不相容元素含量更高，其模式更平坦，HFSE损耗较轻（Nb-Ta，Zr-Hf，Ti，Y弱），并且比E-MORB的地球化学特征更富集。我们的结果表明环境类似于琉球-冲绳（日本）和堪察加弧背弧（俄罗斯）的环境。一个角闪石样品的LA-ICP-MS U-Pb锆石测年法测得的日期为743±3 Ma，并证实了表明该单元是该区域中最古老的单元的地质田间关系。新的Gosto两闪石的岩石学，地球化学和同位素数据导致人们认识到古老的新元古代弧-弧-弧系统，