气候变化领域集成服务门户(CCPortal): Cyclostratigraphy of the global stratotype section and point (GSSP) of the basal Guzhangian Stage of the Cambrian Period

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DOI	10.1016/j.palaeo.2019.109530
	Cyclostratigraphy of the global stratotype section and point (GSSP) of the basal Guzhangian Stage of the Cambrian Period
	Fang J.; Wu H.; Fang Q.; Shi M.; Zhang S.; Yang T.; Li H.; Cao L.
发表日期	2020
ISSN	0031-0182
卷号	540
英文摘要	The Cambrian is the first period of the Phanerozoic during which numerous major geological and biological events occurred. Understanding these events requires a high-resolution time scale. The Luoyixi section in Guzhang (Hunan Province, China) is the global stratotype section and point (GSSP) for the Guzhangian Stage. Here, magnetic susceptibility and δ13C data were used to conduct cyclostratigraphic analyses covering the upper Drumian through lower Guzhangian stages. The results of the power spectral analyses and average spectral misfit analyses indicate that the 25–25.53 m, 6.25–6.91 m, 1.90–2.03 m, and 1.08–1.19 m sedimentary cycles may represent long-eccentricity, short-eccentricity, obliquity and precession cycles, respectively. A ~1400 kyr floating astronomical time scale was constructed using the stable 405-kyr eccentricity cycles to calibrate the agnostoid trilobite zones. The obtained fundamental obliquity period (30.7 ± 0.7 kyr) implies 370,180 ± 1220 km (vs. 384,000 km for present day) for the Earth–Moon distance and 21.58 ± 0.18 h (vs. 23.93 h for present day) for the length of day during the middle Cambrian (500 Ma). © 2019 Elsevier B.V.
英文关键词	Earth–Moon system; Floating astronomical time scale; Luoyixi section; South China
语种	英语
scopus关键词	astronomy; Cambrian; cyclostratigraphy; eccentricity; magnetic susceptibility; Phanerozoic; stratotype; trilobite; China; Hunan; Agnostoidea
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/150627
作者单位	State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China; School of Ocean Sciences, China University of Geosciences, Beijing, 100083, China
推荐引用方式 GB/T 7714	Fang J.,Wu H.,Fang Q.,et al. Cyclostratigraphy of the global stratotype section and point (GSSP) of the basal Guzhangian Stage of the Cambrian Period[J],2020,540.
APA	Fang J..,Wu H..,Fang Q..,Shi M..,Zhang S..,...&Cao L..(2020).Cyclostratigraphy of the global stratotype section and point (GSSP) of the basal Guzhangian Stage of the Cambrian Period.Palaeogeography, Palaeoclimatology, Palaeoecology,540.
MLA	Fang J.,et al."Cyclostratigraphy of the global stratotype section and point (GSSP) of the basal Guzhangian Stage of the Cambrian Period".Palaeogeography, Palaeoclimatology, Palaeoecology 540(2020).