气候变化领域集成服务门户(CCPortal): Climate control on banded iron formations linked to orbital eccentricity

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DOI	10.1038/s41561-019-0332-8
	Climate control on banded iron formations linked to orbital eccentricity
	Lantink M.L.; Davies J.H.F.L.; Mason P.R.D.; Schaltegger U.; Hilgen F.J.
发表日期	2019
ISSN	17520894
卷号	12 期号:5
英文摘要	Astronomical forcing associated with Earth’s orbital and inclination parameters (Milankovitch forcing) exerts a major control on climate as recorded in the sedimentary rock record, but its influence in deep time is largely unknown. Banded iron formations, iron-rich marine sediments older than 1.8 billion years, offer unique insight into the early Earth’s environment. Their origin and distinctive layering have been explained by various mechanisms, including hydrothermal plume activity, the redox evolution of the oceans, microbial and diagenetic processes, sea-level fluctuations, and seasonal or tidal forcing. However, their potential link to past climate oscillations remains unexplored. Here we use cyclostratigraphic analysis combined with high-precision uranium–lead dating to investigate the potential influence of Milankovitch forcing on their deposition. Field exposures of the 2.48-billion-year-old Kuruman Banded Iron Formation reveal a well-defined hierarchical cycle pattern in the weathering profile that is laterally continuous over at least 250 km. The isotopic ages constrain the sedimentation rate at 10 m Myr−1 and link the observed cycles to known eccentricity oscillations with periods of 405 thousand and about 1.4 to 1.6 million years. We conclude that long-period, Milankovitch-forced climate cycles exerted a primary control on large-scale compositional variations in banded iron formations. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	climate cycle; cyclostratigraphy; eccentricity; hydrothermal plume; iron; marine sediment; paleoclimate; sea level change; sedimentary rock; sedimentation rate; weathering profile
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124677
作者单位	Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; Department of Earth Sciences, University of Geneva, Geneva, Switzerland; Département des sciences de la Terre et de l’atmosphère, Université du Québec à Montréal, Montréal, QC, Canada
推荐引用方式 GB/T 7714	Lantink M.L.,Davies J.H.F.L.,Mason P.R.D.,et al. Climate control on banded iron formations linked to orbital eccentricity[J],2019,12(5).
APA	Lantink M.L.,Davies J.H.F.L.,Mason P.R.D.,Schaltegger U.,&Hilgen F.J..(2019).Climate control on banded iron formations linked to orbital eccentricity.Nature Geoscience,12(5).
MLA	Lantink M.L.,et al."Climate control on banded iron formations linked to orbital eccentricity".Nature Geoscience 12.5(2019).