气候变化领域集成服务门户(CCPortal): Revealing exhumation of the central Alps during the Early Oligocene by detrital zircon U–Pb age and fission-track double dating in the Taveyannaz Formation

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DOI	10.1007/s00531-020-01910-z
	Revealing exhumation of the central Alps during the Early Oligocene by detrital zircon U–Pb age and fission-track double dating in the Taveyannaz Formation
	Lu G.; Fellin M.G.; Winkler W.; Rahn M.; Guillong M.; von Quadt A.; Willett S.D.
发表日期	2020
ISSN	14373254
起始页码	2425
结束页码	2446
卷号	109 期号:7
英文摘要	The late Eocene-to-early Oligocene Taveyannaz Formation is a turbidite series deposited in the Northern Alpine Foreland Basin (close to the Alpine orogenic front). Double dating of zircons with the fission-track and the U–Pb methods is applied on samples from the Taveyannaz Formation to reconstruct the exhumation history of the Central-Western Alps and to understand the syn-collisional magmatism along the Periadriatic lineament. Three samples from this unit show similar detrital zircon fission-track age populations that center at: 33–40 Ma (20%); 69–92 Ma (30–40%); and 138–239 Ma (40–50%). The youngest population contains both syn-volcanic and basement grains. Combined with zircon U–Pb data, it suggests that the basement rocks of Apulian-affinity nappes (Margna Sesia, Austroalpine) were the major sources of detritus, together with the Ivrea Zone and recycled Prealpine flysch, that contributed debris to the Northern Alpine Foreland Basin. Furthermore, the rocks of the Sesia–Lanzo Zone or of equivalent units exposed at that time presumably provided the youngest basement zircon fission-track ages to the basin. The Biella volcanic suite was the source of volcanogenic zircons. Oligocene sediment pathways from source to sink crossed further crystalline basement units and sedimentary covers before entering the basin from the southeast. The lag times of the youngest basement age populations (volcanic zircons excluded) are about 11 Myr. This constrains average moderate-to-high exhumation rate of 0.5–0.6 km/Myr in the pro-side of the orogenic wedge of the Central Alps during the late Eocene to early Oligocene. © 2020, The Author(s).
英文关键词	Alpine magmatism; Detrital zircons; Exhumation; U–Pb/fission-track dating
语种	英语
scopus关键词	age determination; detritus; exhumation; fission track dating; magmatism; Oligocene; reconstruction; uranium-lead dating; zircon; Alps; Central Alps; Prealps
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/147620
作者单位	Department of Earth Sciences, ETH Zurich, Zurich, Switzerland; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, China; Swiss Federal Nuclear Safety Inspectorate, Brugg, Switzerland
推荐引用方式 GB/T 7714	Lu G.,Fellin M.G.,Winkler W.,等. Revealing exhumation of the central Alps during the Early Oligocene by detrital zircon U–Pb age and fission-track double dating in the Taveyannaz Formation[J],2020,109(7).
APA	Lu G..,Fellin M.G..,Winkler W..,Rahn M..,Guillong M..,...&Willett S.D..(2020).Revealing exhumation of the central Alps during the Early Oligocene by detrital zircon U–Pb age and fission-track double dating in the Taveyannaz Formation.International Journal of Earth Sciences,109(7).
MLA	Lu G.,et al."Revealing exhumation of the central Alps during the Early Oligocene by detrital zircon U–Pb age and fission-track double dating in the Taveyannaz Formation".International Journal of Earth Sciences 109.7(2020).