气候变化领域集成服务门户(CCPortal): Provenance of Neogene deposits of Barreiras Formation in the southeastern Brazilian continental margin

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DOI	10.1007/s00531-020-01949-y
	Provenance of Neogene deposits of Barreiras Formation in the southeastern Brazilian continental margin
	Dias A.N.C.; Guadagnin F.; Rangel C.V.G.T.; Chemale F.; Jr.; Oliveira T.R.P.; Moura C.A.; Pereira V.Q.; Alves J.S.E.
发表日期	2020
ISSN	14373254
英文摘要	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. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Barreiras formation; Detrital zircon; Provenance; Thermal history
语种	英语
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147741
作者单位	Departamento de Física, Química e Matemática, CCTS, UFSCar, Campus Sorocaba, Rodovia João Leme Dos Santos, Km 110, Sorocaba, SP 18052-780, Brazil; Campus Caçapava Do Sul, UNIPAMPA, Caçapava Do Sul, RS 96570-000, Brazil; Centro de Formação Em Ciências Ambientais, UFSB, Porto Seguro, BA 29500-000, Brazil; Universidade Do Vale Do Rio Dos Sinos, São Leopoldo, RS 93022-000, Brazil; Instituto de Geociências, UFPA, Belém, PA 66075-900, Brazil; Departamento de Geologia, UFES, Vitória, ES 29075-910, Brazil
推荐引用方式 GB/T 7714	Dias A.N.C.,Guadagnin F.,Rangel C.V.G.T.,et al. Provenance of Neogene deposits of Barreiras Formation in the southeastern Brazilian continental margin[J],2020.
APA	Dias A.N.C..,Guadagnin F..,Rangel C.V.G.T..,Chemale F..,Jr..,...&Alves J.S.E..(2020).Provenance of Neogene deposits of Barreiras Formation in the southeastern Brazilian continental margin.International Journal of Earth Sciences.
MLA	Dias A.N.C.,et al."Provenance of Neogene deposits of Barreiras Formation in the southeastern Brazilian continental margin".International Journal of Earth Sciences (2020).