globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.10.014
论文题名:
Geologic evidence for chaotic behavior of the planets and its constraints on the third-order eustatic sequences at the end of the Late Paleozoic Ice Age
作者: Fang Q.; Wu H.; Hinnov L.A.; Jing X.; Wang X.; Jiang Q.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 440
起始页码: 848
结束页码: 859
语种: 英语
英文关键词: Late Paleozoic Ice Age ; Long-period astronomical forcing ; Maokou Formation ; Milankovitch cycles ; South China ; Third-order eustatic sequence
英文摘要: High-resolution (948 samples) measurements of anhysteretic remanent magnetization (ARM) were performed on the ~200m thick Early-Middle Permian Maokou Formation of the Shangsi section, South China. The ARM variations are quasi-periodic and the wavelengths of significant cycles collectively present a ratio of 20:5:2:1 throughout the formation, corresponding to long orbital eccentricity, short orbital eccentricity, obliquity, and precession cycles. A strong obliquity (44 and 33kyr) signal suggests that waning and waxing of the ice sheet in eastern Australia at the end of the Late Paleozoic Ice Age (LPIA) exerted a significant influence on global climate and sea level. A "floating" astronomical time scale (ATS) is developed using the 405kyr orbital eccentricity cycle as an astronomical calibration target. This results in estimation of the Roadian and Wordian stages duration as 3.7±0.4myr and 2.9±0.4myr, respectively. Prominent ~2myr cycles likely originated from Earth and Mars secular frequencies g4-g3, and ~1myr cycles from s4-s3. These periodicities are shorter than those observed in the Cenozoic Era, which may be due to the chaotic behavior of the planets, but still reflecting 2:1 secular resonance between Earth and Mars. Third-order eustatic sequences are linked to the s4-s3 obliquity term, which suggests a glacioeustatic controlling mechanism during this transitional stage from Paleozoic icehouse to Mesozoic greenhouse. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68734
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, China; School of Ocean Sciences, China University of Geosciences, Beijing, China; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China

Recommended Citation:
Fang Q.,Wu H.,Hinnov L.A.,et al. Geologic evidence for chaotic behavior of the planets and its constraints on the third-order eustatic sequences at the end of the Late Paleozoic Ice Age[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,440
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