气候变化领域集成服务门户(CCPortal): Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions; Permian (Roadian-lower Capitanian); Chaohu; Lower Yangtze; South China

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DOI	10.1016/j.palaeo.2019.05.004
	Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions; Permian (Roadian-lower Capitanian); Chaohu; Lower Yangtze; South China
	Yao X.; Hinnov L.A.
发表日期	2019
ISSN	0031-0182
起始页码	258
结束页码	271
卷号	528
英文摘要	Successions of Mesozoic and Paleozoic radiolarian-bedded cherts display a “binary” cyclic hierarchy of cm-scale chert and mudstone couplets. Some of these couplet successions contain an apparent imprint of Milankovitch cycles, in which the couplets may reflect changes in silica deposition related to Milankovitch forcing, for example, high insolation for chert deposition, and low insolation for mudstone. The challenge has been how to represent such binary lithologic series in a format that is suitable for signal processing to search for Milankovitch cycles. Here we present an analysis of chert-mudstone binary series by considering, in lieu of a “boxcar” linear interpolation, a “midpoint-triangle” linear interpolation. The procedure is demonstrated first on synthetic data, then on the binary chert-mudstone stratigraphic series of the Permian (Guadalupian: Roadian-lower Capitanian) Gufeng Formation, Chaohu, Lower Yangtze, South China. We assign −1 to the midpoint of each mudstone bed and 1 to the midpoint of each chert bed, then linearly interpolate from midpoint to midpoint along the succession. Time-frequency analysis of the midpoint-triangle series highlights a previously unnoticed stratigraphic alternation of obliquity and precession band power. Finally, we present a revised astrochronology for the Gufeng succession that is anchored at 270 Ma at the base of the Jinogondolella nankingensis conodont zone (base of Roadian stage) and ending at 264.6 Ma in the undifferentiated Follicucullus scholasticus-Ruzhencivisponus uralicas radiolarian zone (mid-Capitanian Stage), for a duration of 5.4 Myr. © 2019 Elsevier B.V.
英文关键词	Boxcar series; Guadalupian; Gufeng Formation; Midpoint-triangle series; Milankovitch cycles; Triangle series
语种	英语
scopus关键词	chert; conodont; cyclostratigraphy; lithology; Mesozoic; Milankovitch cycle; mudstone; obliquity; Paleozoic; Permian; radiolaria; China
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/150919
作者单位	School of Earth Sciences, Lanzhou University, Lanzhou, China; Key Laboratory of Mineral Resources in Western China (Gansu Province), Lanzhou University, China; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States
推荐引用方式 GB/T 7714	Yao X.,Hinnov L.A.. Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions; Permian (Roadian-lower Capitanian); Chaohu; Lower Yangtze; South China[J],2019,528.
APA	Yao X.,&Hinnov L.A..(2019).Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions; Permian (Roadian-lower Capitanian); Chaohu; Lower Yangtze; South China.Palaeogeography, Palaeoclimatology, Palaeoecology,528.
MLA	Yao X.,et al."Advances in characterizing the cyclostratigraphy of binary chert-mudstone lithologic successions; Permian (Roadian-lower Capitanian); Chaohu; Lower Yangtze; South China".Palaeogeography, Palaeoclimatology, Palaeoecology 528(2019).