气候变化领域集成服务门户(CCPortal): A new stratigraphic framework built on U-Pb singlezircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)

CCPortal

DOI	10.1130/B31775.1
	A new stratigraphic framework built on U-Pb singlezircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)
	Griffis N.P.; Mundil R.; Montañez I.P.; Isbell J.; Fedorchuk N.; Vesely F.; Iannuzzi R.; Yin Q.-Z.
发表日期	2018
ISSN	167606
起始页码	848
结束页码	858
卷号	130 期号:2021-05-06
英文摘要	The timing of the late Paleozoic glaciation and its terminal deglaciation in the Paraná Basin, Brazil, is unconstrained and prohibits correlation of the Paraná Basin ice record with other high-latitude Gondwanan and low-latitude contemporaneous records. Here, we reexamine the existing U-Pb framework for the Carboniferous-Permian Paraná succession through high-precision, single-crystal chemical abrasion-thermal ionization mass spectrometry (CA-TIMS) analysis of individual zircons from tonsteins and subaerial volcanic ash deposits, which overlie sedimentary deposits with glacial indicators. The new ages document two distinct volcanic intervals and define a substantially new and revised chronostratigraphy for postglacial coal-bearing intervals in the southern Paraná Basin. The new CA-TIMS ages further indicate that glaciation in south-central Gondwana, long considered to be Early Permian, is entirely Carboniferous in age and that terminal deglaciation in this key west-central Gondwanan basin occurred near the Permian- Carboniferous boundary. Single-crystal U-Pb CA-TIMS ages from the ice-proximal high-latitude basins of southern Africa and Australia are needed to test the synchronicity of late Paleozoic glaciation and deglaciation events throughout Gondwana, with implications for empirical- and model-based paleoclimate reconstructions. © 2017 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185038
作者单位	Department of Earth and Planetary Sciences, University of California, Davis, CA 95616, United States; Berkeley Geochronology Center, Berkeley, CA 94709, United States; Department of Geosciences, University of Wisconsin, Milwaukee, WI 53211, United States; Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, 80060-000, Brazil; Departamento de Paleontologia e Estratigrafia, Universidade Federal Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil
推荐引用方式 GB/T 7714	Griffis N.P.,Mundil R.,Montañez I.P.,et al. A new stratigraphic framework built on U-Pb singlezircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)[J],2018,130(2021-05-06).
APA	Griffis N.P..,Mundil R..,Montañez I.P..,Isbell J..,Fedorchuk N..,...&Yin Q.-Z..(2018).A new stratigraphic framework built on U-Pb singlezircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil).Bulletin of the Geological Society of America,130(2021-05-06).
MLA	Griffis N.P.,et al."A new stratigraphic framework built on U-Pb singlezircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)".Bulletin of the Geological Society of America 130.2021-05-06(2018).