The Barreiras Formation records continental-to-shallow–water marine sequences deposited during the Paleogene–Neogene periods in the Brazilian continental margin. In northern Rio de Janeiro and southern Espírito Santo states, the Barreiras Formation preserve alluvial depositional system. The sediments were derived from a source located in the hinterland of the southeastern Brazilian continental margin, where rocks formed or reworked notably during the Gondwana supercontinent assembly are exposed. Detrital zircon U–Pb ages are mostly late Neoproterozoic, dominantly close to 608 Ma. Source rocks of this age occurred within the Ribeira and Araçuaí belts and were formed during their main magmatic activity. U–Pb zircon age distribution is similar to the southern and central Ribeira belt. Zircon fission-track ages occur in four main groups, between 429 and 358 Ma, 351 and 274 Ma, 270 and 171 Ma, and 167 and 127 Ma. Complex variation in the detrital zircon fission-track ages is related to the continental crust thermal evolution in the source areas. Older ages also occur between 534 and 433 Ma (Cambrian-to-Silurian periods) and are chrono-correlated to post-orogenic processes after the Gondwana supercontinent agglutination. Zircon fission-track ages between 429 and 274 Ma (Silurian to Permian periods) are related to the formation of the Pangea supercontinent, whereas the predominant zircon fission-track age group, between 270 and 171 Ma (Permian to Jurassic periods), is chrono-correlated to both orogeneses in the Gondwana supercontinent west margin and the Pangea supercontinent breakup. Zircon fission-track ages from 167 to 127 Ma are in the same period as the opening of the North and South Atlantic oceans. Data indicate that the thermal evolution of the source region either during the Gondwana supercontinent and South America Platform stages is complex.

Barreiras组记录了巴西大陆边缘古近纪至新近纪时期沉积的大陆到浅水海洋层序。在里约热内卢北部和圣埃斯皮里图州南部，Barreiras组保留了冲积沉积系统。沉积物来自位于巴西东南部大陆腹地腹地的一个源头，在那里，冈瓦纳超大陆组装过程中形成或重新构造的岩石被暴露出来。碎屑锆石的U–Pb年龄多数为新元古代晚期，主要接近608 Ma。该年龄的烃源岩发生在Ribeira和Araçuaí带内，是在其主要岩浆活动期间形成的。U–Pb锆石的年龄分布与南部和中部里贝拉带相似。锆石的裂变径迹年龄主要分为四个组，介于429和358 Ma之间，351和274 Ma之间，270和171 Ma之间以及167和127 Ma之间。碎屑锆石裂变径迹年龄的复杂变化与源区的大陆壳热演化有关。较高年龄也发生在534至433 Ma（寒武纪至Silurian时期）之间，并且与冈瓦纳超大陆凝集后的造山后过程年代相关。锆石的裂变径迹年龄在429至274 Ma（Si利期至二叠纪）与超大陆的形成有关，而主要的锆石裂变径迹年龄组在270至171 Ma（二叠纪至侏罗纪）之间是时间上的。 -与冈瓦纳超大陆西缘的造山带和Pangea超大陆碎裂有关。锆石的裂变径迹年龄在167至127 Ma之间，与北大西洋和南大西洋的开放时间相同。数据表明，在冈瓦纳超大陆和南美平台阶段，源区的热演化是复杂的。