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	High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China
通讯作者	Liu, Jian-Bo([email protected])
	Wang, Kai1; Li, Ming-Song1,2; Tang, Peng3,4; Fan, Jun-Xuan5,6; Zhan, Ren-Bin3,4; Liu, Jian-Bo1,2
	2025-06-01
发表期刊	PALAEOWORLD
ISSN	1871-174X
卷号	34期号:3页码:22
摘要	During the Late Ordovician, a series of significant biotic and geological events occurred globally and more specifically in South China. The development of a high-resolution orbital cyclostratigraphic framework and a precise radioisotope dating has greatly enhanced our understanding of the factors controlling these events. In this study, quantitative proxies for palaeo-water depths, derived from sedimentological analyses, serve as indicators for orbital cyclostratigraphic assessment. Relatively shallow-marine carbonates with well-developed shallowing-upward cycles were deposited in the western Yangtze Platform during the Late Ordovician. High-resolution geochronological data were obtained from high-precision isotope dilution thermal ionization mass spectrometry (ID-TIMS) zircon dating of K-bentonite beds at the studied section. This facilitated sedimentary facies and environmental analyses, as well as the recognition of sedimentary cycles. Based on mud content, bioclastic content, and laminations, four sedimentary facies, twelve sedimentary microfacies, and forty-eight shallowing-upward sedimentary cycles were identified in the Daduhe Formation. Through comparative time series analysis of depth rank, lime mudstone-calcareous mudstone binary data, non-carbonate content, and anhysteretic remanent magnetization (ARM), astronomical cycles and trends in sedimentation rates have been identified. This study confirms the reliability of radioisotope dating, establishing a 0.46 Myr duration for the Dicellograptus complexus graptolite biozone and a 0.96 Myr duration for the Paraorthograptus pacificus graptolite biozone, both with an empirical uncertainty of 0.1 Myr. This research proposes a reliable method for identifying astronomical cycles through high-precision sedimentary microfacies and cyclostratigraphy, in comparison with rock magnetic cyclostratigraphy studies. (c) 2024 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
关键词	Cyclostratigraphy astronomical time scale palaeowater depth rank microfacies
DOI	10.1016/j.palwor.2024.11.001
收录类别	SCI
语种	英语
关键词[WOS]	SEA-LEVEL CHANGES ; MILANKOVITCH CYCLES ; STACKING PATTERNS ; CLIMATE ; MIDDLE ; BASIN ; SEQUENCE ; GLACIATION ; NORTHERN ; RECORD
资助项目	National Key Research and Development Program[2022YFF0800204] ; National Key Research and Development Program[2022YFF0802900] ; National Natural Science Foundation of China[41972027]
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:001424361400001
项目资助者	National Key Research and Development Program ; National Natural Science Foundation of China
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44890
专题	中国科学院南京地质古生物研究所
通讯作者	Liu, Jian-Bo
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Minist Educ, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironment, Nanjing 210008, Peoples R China 5.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China 6.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China
推荐引用方式 GB/T 7714	Wang, Kai,Li, Ming-Song,Tang, Peng,et al. High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China[J]. PALAEOWORLD,2025,34(3):22.
APA	Wang, Kai,Li, Ming-Song,Tang, Peng,Fan, Jun-Xuan,Zhan, Ren-Bin,&Liu, Jian-Bo.(2025).High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China.PALAEOWORLD,34(3),22.
MLA	Wang, Kai,et al."High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China".PALAEOWORLD 34.3(2025):22.

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