气候变化领域集成服务门户(CCPortal): Astronomical forcing of Middle Permian terrestrial climate recorded in a large paleolake in northwestern China

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DOI	10.1016/j.palaeo.2020.109735
	Astronomical forcing of Middle Permian terrestrial climate recorded in a large paleolake in northwestern China
	Huang H.; Gao Y.; Jones M.M.; Tao H.; Carroll A.R.; Ibarra D.E.; Wu H.; Wang C.
发表日期	2020
ISSN	0031-0182
卷号	550
英文摘要	Geological records of Milankovitch cycles provide a temporal framework for reconstructing Earth climate evolution and mapping out the history of the ancient Solar System. Understanding the fundamental celestial mechanics driving astronomical rhythms during the Permian Period from stratigraphic record is challenging because of the inherent limitations of astronomical solutions, the chaotic nature of Solar System motion, and the paucity of cyclostratigraphic studies of geological records. The Junggar and adjacent basins of northwestern China constituted a large tectonic lake in the Middle Permian, which deposited one of the thickest and richest petroleum source rock intervals in the world. Constructing an accurate timescale for the Permian Junggar Basin is critical to understand the processes that controlled organic carbon burial as well as paleoclimatic and paleoenvironmental background conditions. In this study, detailed spectral analyses of natural gamma ray (NGR) data were performed on the lacustrine muddy-dominated Lucaogou Formation from five exploitation wells. The results reveal significant meter-scale sedimentary cycles of 37.8 m, 10.7–10 m, 3.85–3.2 m, and 2.0–1.58 m, reflecting oscillations in lithologies (variations in changing clay content within the mudstone, sandstone and dolomite). These cycle wavelength ratios match well with those of the Milankovitch cycles predicted for Middle Permian Period. The depositional duration of the Lucaogou Formation was estimated at ~3 Myr. Correlation of the ~1.2 Myr obliquity modulation cycles among the NGR logs, sedimentation rates, and lake levels of the Junggar Basin, as well as with the Middle Permian global sea level, suggests that long-term astronomical “grand cycles” tightly forced climatic and sedimentary processes throughout the Lucaogou Formation. According to two independent approaches, we reconstruct Middle Permian astronomical parameters (Earth precession constant: k and fundamental frequencies terms: gi; i = 1, 2, 3, 4, 5) and calculate astronomical periods (eccentricity, obliquity and precession). These results document astronomical forcing of Paleozoic lake systems, constrain Earth-Moon orbital evolution, and refine the fundamental astronomical frequencies of the Solar System during the Middle Permian. © 2020 The Authors
英文关键词	Cyclostratigraphy; Earth-Moon history; Junggar Basin; Lucaogou Formation; Paleoclimate
语种	英语
scopus关键词	cyclostratigraphy; exploitation; geological record; organic carbon; Paleozoic; Permian; petroleum; sandstone; sedimentation rate; solar system; source rock; China; Junggar Basin; Xinjiang Uygur
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/150486
作者单位	State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing, 100083, China; School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing, 100083, China; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States; Gansu Provincial Key Laboratory of Petroleum Resources, Northwest Institute Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Department of Geoscience, University of Wisconsin–Madison, Madison, WI 53706, United States; Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA 94720, United States; Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; School of Ocean Sciences, China University of Geosciences (Beijing), Beijing, 100083, China
推荐引用方式 GB/T 7714	Huang H.,Gao Y.,Jones M.M.,et al. Astronomical forcing of Middle Permian terrestrial climate recorded in a large paleolake in northwestern China[J],2020,550.
APA	Huang H..,Gao Y..,Jones M.M..,Tao H..,Carroll A.R..,...&Wang C..(2020).Astronomical forcing of Middle Permian terrestrial climate recorded in a large paleolake in northwestern China.Palaeogeography, Palaeoclimatology, Palaeoecology,550.
MLA	Huang H.,et al."Astronomical forcing of Middle Permian terrestrial climate recorded in a large paleolake in northwestern China".Palaeogeography, Palaeoclimatology, Palaeoecology 550(2020).