气候变化领域集成服务门户(CCPortal): Detrital zircon U–Pb geochronology constrains the age of Brazilian Neogene deposits from Western Amazonia

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DOI	10.1016/j.palaeo.2018.11.032
	Detrital zircon U–Pb geochronology constrains the age of Brazilian Neogene deposits from Western Amazonia
	Bissaro-Júnior M.C.; Kerber L.; Crowley J.L.; Ribeiro A.M.; Ghilardi R.P.; Guilherme E.; Negri F.R.; Souza Filho J.P.; Hsiou A.S.
发表日期	2019
ISSN	0031-0182
起始页码	64
结束页码	70
卷号	516
英文摘要	The fossiliferous beds of the Solimões Formation, western Brazilian Amazon have yielded several vertebrate fossils that are key to understand the evolution of Neotropical biotas. Although this sedimentary unit has been studied for more than two centuries, no absolute dates are available so far, preventing more precise bio/chronostratigraphic interpretations and broader comprehension of the biotic/geological events that affected this northern portion of South America during the Neogene. Here, we present the first Neogene radioisotopic dates for the Brazilian Amazon, via U-Pb dating of detrital zircon from two classical sites. Both samples have small proportions of relatively young zircon grains, the dates from which are the maximum ages of deposition. LA-ICPMS analysis of two grains from the Niterói locality yielded a weighted mean of 8.5 ± 0.5 Ma and CA-TIMS analysis of two grains from the Talismã locality yielded a weighted mean of 10.89 ± 0.13 Ma. These maximum deposition ages are in the Tortonian stage, late Miocene, confirming the age previously inferred based on biochronological data. © 2018 Elsevier B.V.
英文关键词	Absolute age; Acre fauna; Miocene; SALMA; Solimões Formation
语种	英语
scopus关键词	biostratigraphy; deposition; detrital deposit; fauna; fossil assemblage; geochronology; Miocene; Neogene; Neotropical Region; uranium-lead dating; vertebrate; zircon; Amazonas [Brazil]; Amazonia; Brazil; Niteroi; Rio de Janeiro [Brazil]; Solimoes Basin; Vertebrata
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151109
作者单位	Universidade de São Paulo–USP, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Ribeirão Preto, São Paulo 14040-901, Brazil; Universidade Federal de Santa Maria-UFSM, CAPPA – Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, São João do Polêsine, Rio Grande do Sul 97230-000, Brazil; Boise State University, Department of Geosciences, Boise, ID 83725-1535, United States; Museu de Ciências Naturais da Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90690-000, Brazil; Universidade Estadual Paulista–UNESP, Departamento de Ciências Biológicas, Faculdade de Ciências, Bauru, São Paulo 17033-360, Brazil; Universidade Federal do Acre–UFAC, Departamento de Ciências da Natureza, Campus Universitário, Rio Branco, Acre 69915-900, Brazil; Universidade Federal do Acre–UFAC, Campus Floresta, Cruzeiro do Sul, Acre 69980-000, Brazil
推荐引用方式 GB/T 7714	Bissaro-Júnior M.C.,Kerber L.,Crowley J.L.,等. Detrital zircon U–Pb geochronology constrains the age of Brazilian Neogene deposits from Western Amazonia[J],2019,516.
APA	Bissaro-Júnior M.C..,Kerber L..,Crowley J.L..,Ribeiro A.M..,Ghilardi R.P..,...&Hsiou A.S..(2019).Detrital zircon U–Pb geochronology constrains the age of Brazilian Neogene deposits from Western Amazonia.Palaeogeography, Palaeoclimatology, Palaeoecology,516.
MLA	Bissaro-Júnior M.C.,et al."Detrital zircon U–Pb geochronology constrains the age of Brazilian Neogene deposits from Western Amazonia".Palaeogeography, Palaeoclimatology, Palaeoecology 516(2019).