Article(id=1301938712514945798, tenantId=1146029695717560320, journalId=1301849983571558468, issueId=1301938707137848028, articleNumber=null, orderNo=null, doi=10.14027/j.issn.1000-0550.2026.004, pmid=null, cstr=32268.14/j.cjxb.62-1038.2026.004, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1769356800000, receivedDateStr=2026-01-26, revisedDate=1770652800000, revisedDateStr=2026-02-10, acceptedDate=1770998400000, acceptedDateStr=2026-02-14, onlineDate=1788335977915, onlineDateStr=2026-09-02, pubDate=1786291200000, pubDateStr=2026-08-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1788335977915, onlineIssueDateStr=2026-09-02, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1788335977915, creator=13701087609, updateTime=1788335977915, updator=13701087609, issue=Issue{id=1301938707137848028, tenantId=1146029695717560320, journalId=1301849983571558468, year='2026', volume='44', issue='4', pageStart='1215', pageEnd='1587', issueExtLink='null', onlineDate='null', pubDate='1786291200000', pubDateStr='2026-08-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1788335976633, creator='13701087609', updateTime=1788405108360, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1302228666671460469, tenantId=1146029695717560320, journalId=1301849983571558468, issueId=1301938707137848028, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1302228666671460470, tenantId=1146029695717560320, journalId=1301849983571558468, issueId=1301938707137848028, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1215, endPage=1237, ext={EN=ArticleExt(id=1301938712695300871, articleId=1301938712514945798, tenantId=1146029695717560320, journalId=1301849983571558468, language=EN, title=High
-Precision Astronomical Time Scale for the Late Ordovician
-Early Silurian and Its Temporal Constraints on the End
-Ordovician Mass Extinction, columnId=null, journalTitle=Acta Sedimentologica Sinica, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Objective The Late Ordovician to Early Silurian represents a critical transition in Earth's history, characterized by the Hirnantian glaciation and the end-Ordovician mass extinction event. However, significant uncertainties persist in the chronostratigraphic framework for this interval, limiting our understanding of the mechanisms driving biotic extinction and climatic evolution. This study aims to establish a high-resolution absolute astronomical time scale for the Late Ordovician-Early Silurian through the integration of cyclostratigraphy and isotopic geochronology, providing robust temporal constraints for major geological events. Methods Three sections (Shuanghe in Chang-ning, Sichuan; Anwen in Qijiang, Chongqing; and Wangjiawan in Yichang, Hubei) were selected as study sites. High-resolution elemental data (Si, Fe, Ca, Al, Rb/Sr, etc.) were analyzed using AnalySeries and Acycle software to identify Milankovitch cycle signals. Sedimentation rates were estimated using the COCO/eCOCO and TimeOpt methods to construct floating astronomical time scales. CA-ID-TIMS zircon U-Pb dating was conducted on volcanic ash beds to obtain absolute age anchors, enabling precise conversion from the depth domain to the time domain. Results (1) Stable sedimentary cycles corresponding to 405-kyr and ~100-kyr long and short eccentricity cycles were identified in the XRF elemental series. Floating astronomical time scales of 12.2 Myr, 10.3 Myr, and 2.75 Myr were established for the Shuanghe section, Anwen section, and Wangjiawan section, respectively. (2) Given the most complete geological record preserved in the Shuanghe section, the ages of the Ordovician/Silurian (O/S) boundary and the base of the Hirnantian stage, calibrated to 442.34 ± 0.22 Ma and 443.78 ± 0.22 Ma respectively through cyclostratigraphic analysis combined with U-Pb dating of volcanic ash beds (Shuanghe section: 438.47 ± 0.17 Ma), can serve as a candidate for future international chronostratigraphic standards. (3) The duration of the Hirnantian stage is 1.44 Myr at the Shuanghe section, but only ~0.41 Myr at the Wangjiawan section, suggesting that a sedimentary hiatus may exist in the Wangjiawan section. (4) Paleoclimatic proxies and sea-level changes exhibited long-period fluctuations of 1.2 Myr and 2.4 Myr. Conclusions The high-precision astronomical time scale established in this study significantly improves the accuracy of the chronostratigraphic framework for the Late Ordovician-Early Silurian, revealing the rapid onset of the end-Ordovician mass extinction. Astronomical cycles played a significant role in driving climate-environmental evolution during this interval, providing key temporal constraints for understanding the triggering mechanisms of the end-Ordovician mass extinction.
, authors=ChunJu HUANG
1, RuiYao ZHANG
2, ShengHui DENG
3, Zheng WANG
1, RanRan ZHANG
1, JianHao LIANG
1, authorsList=ChunJu HUANG, RuiYao ZHANG, ShengHui DENG, Zheng WANG, RanRan ZHANG, JianHao LIANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1301938713160868617, articleId=1301938712514945798, tenantId=1146029695717560320, journalId=1301849983571558468, language=CN, title=晚奥陶世—早志留世高精度天文年代标尺及其对奥陶纪末生物大灭绝的时间约束, columnId=null, journalTitle=沉积学报, columnName=, runingTitle=null, highlight=null, articleAbstract=
目的 晚奥陶世—早志留世是地球演化史上的关键转折期,以赫南特冰期和奥陶纪末生物大灭绝事件为核心标志,但该时期地质年代框架的精度仍存在较大争议,制约了对生物灭绝机制与气候演化过程的深入理解。本研究旨在通过旋回地层学与同位素测年的交叉融合,建立晚奥陶世—早志留世的高分辨率绝对天文年代标尺,为重大地质事件的精细时间约束提供科学依据。 方法 以四川长宁双河、重庆綦江安稳和湖北宜昌王家湾三个剖面为研究对象,对采集的高分辨率元素数据(Si、Fe、Ca、Al、Rb/Sr等),利用AnalySeries和Acycle软件进行旋回分析,识别米兰科维奇旋回信号;通过COCO/eCOCO和TimeOpt方法估算沉积速率,建立浮动天文年代标尺;同时对剖面火山灰层进行CA-ID-TIMS锆石U-Pb测年,获取绝对年龄锚点,实现深度域到时间域的精确转换。 结果 (1)在XRF元素序列中识别出稳定的对应于405 kyr和~100 kyr长短偏心率周期的沉积旋回,双河、安稳和王家湾剖面分别建立了长度为12.2 Myr、10.3 Myr和2.75 Myr的浮动天文年代标尺;(2)由于双河剖面的地质记录最全,旋回分析结合火山灰层U-Pb年龄(双河剖面:438.47±0.17 Ma),标定的奥陶纪/志留纪界线和赫南特阶底界线年龄442.34±0.22 Ma和443.78±0.22 Ma可作为未来国际地质年代标准;(3)赫南特阶的持续时间在双河剖面为1.44 Myr,而在王家湾剖面约为0.41 Myr,推断王家湾剖面可能存在沉积间断;(4)古气候指标与海平面变化均显示出1.2 Myr和2.4 Myr的长周期波动。 结论 建立了晚奥陶世—早志留世高精度天文年代标尺,显著提升了该时期地质年代框架的精度,揭示了奥陶纪末生物大灭绝事件的快速发生过程。天文周期对该时期气候—环境演化具有显著的驱动作用,为深入理解奥陶纪末生物大灭绝的触发机制提供了关键时间约束。
, authors=黄春菊
1, 张瑞尧
2, 邓胜徽
3, 王政
1, 张然然
1, 梁建昊
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1, address=
1.State Key Laboratory of Geomicrobiology and Environmental changes, Hubei Key Laboratory of Critical Zone Evolution, School of Earth and Planetary Sciences, China University of Geosciences, Wuhan 430074, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307264125164352187, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264124690395832, language=CN, stringName=黄春菊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074, bio={"content":"
黄春菊,女,1974年出生,博士,教授,旋回地层学,E-mail: huangcj@cug.edu.cn
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黄春菊,女,1974年出生,博士,教授,旋回地层学,E-mail: huangcj@cug.edu.cn
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1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074)])]), Author(id=1307264125231461053, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307264125587976895, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264125231461053, language=EN, stringName=RuiYao ZHANG, firstName=RuiYao, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, address=
2.College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, Hubei 435002, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307264125655085760, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264125231461053, language=CN, stringName=张瑞尧, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2.湖北师范大学城市与环境学院,湖北 黄石 435002, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307264122672935601, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, xref=2., ext=[AuthorCompanyExt(id=1307264122681324210, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, companyId=1307264122672935601, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.湖北师范大学城市与环境学院,湖北 黄石 435002)])]), Author(id=1307264125730583234, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307264125957075652, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264125730583234, language=EN, stringName=ShengHui DENG, firstName=ShengHui, middleName=null, lastName=DENG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3.PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307264126015795909, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264125730583234, language=CN, stringName=邓胜徽, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3.中国石油勘探开发研究院,北京 100083, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307264123071394484, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, xref=3., ext=[AuthorCompanyExt(id=1307264123113337525, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, companyId=1307264123071394484, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3.中国石油勘探开发研究院,北京 100083)])]), Author(id=1307264126082904775, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307264126158402249, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264126082904775, language=EN, stringName=Zheng WANG, firstName=Zheng, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.State Key Laboratory of Geomicrobiology and Environmental changes, Hubei Key Laboratory of Critical Zone Evolution, School of Earth and Planetary Sciences, China University of Geosciences, Wuhan 430074, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307264126342951626, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264126082904775, language=CN, stringName=王政, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307264122589049518, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, xref=1., ext=[AuthorCompanyExt(id=1307264122597438127, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, companyId=1307264122589049518, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074)])]), Author(id=1307264126405866188, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307264126477169358, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264126405866188, language=EN, stringName=RanRan ZHANG, firstName=RanRan, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.State Key Laboratory of Geomicrobiology and Environmental changes, Hubei Key Laboratory of Critical Zone Evolution, School of Earth and Planetary Sciences, China University of Geosciences, Wuhan 430074, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307264126544278223, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264126405866188, language=CN, stringName=张然然, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1307264122589049518, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, xref=1., ext=[AuthorCompanyExt(id=1307264122597438127, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, companyId=1307264122589049518, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.中国地质大学(武汉)地球与行星科学学院,地质微生物与环境全国重点实验室,关键带演化湖北省重点实验室,武汉 430074)])]), Author(id=1307264126628164305, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, orderNo=5, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307264126703661779, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, authorId=1307264126628164305, language=EN, stringName=JianHao LIANG, firstName=JianHao, middleName=null, lastName=LIANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Paleogeographic map of the study area(a) paleoceanographic map at 445 Ma (modified from Scotese, 2023); (b) paleogeographic map showing the Shuanghe section, Anwen section, and Wangjiawan section (modified from Zhang et al.,2014; Wang et al.,2017; Wang et al.,2024)
, figureFileSmall=p8iPPxyt+ogNcObMHypCqA==, figureFileBig=zWDEttS8d4AouEpXXkLv/g==, tableContent=null), ArticleFig(id=1307264129509651168, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图1, caption=
研究区古地理位置图(a)445 Ma时期的古海洋图(据Scotese,2023修改);(b)赫南特阶沉积时期的双河、安稳和王家湾三个剖面的古地理图(据Zhang et al.,2014;Wang et al.,2017;Wang et al.,2024修改)
, figureFileSmall=p8iPPxyt+ogNcObMHypCqA==, figureFileBig=zWDEttS8d4AouEpXXkLv/g==, tableContent=null), ArticleFig(id=1307264129748726497, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.2, caption=
Integrated stratigraphy and sedimentation rate estimation of the Shuanghe section(a) chronostratigraphy of the Shuanghe section and XRF element data series,boundary ages from GTS2020; (b) COCO/eCOCO sedimentation rate estimation diagram of Si element; (c) TimeOpt analysis diagram of Si element at -10~10 m
, figureFileSmall=9RncwG+nmzvKPkhYExoC/w==, figureFileBig=cLj3Aruh4e01GR7Llm5G2A==, tableContent=null), ArticleFig(id=1307264129832612578, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图2, caption=
双河剖面的综合地层及沉积速率估算图(a)双河剖面的年代地层及XRF元素数据序列,其中界线年龄来自GTS2020;(b)Si元素的COCO/eCOCO沉积速率估算图;(c)Si元素-10~10 m的TimeOpt分析图
, figureFileSmall=9RncwG+nmzvKPkhYExoC/w==, figureFileBig=cLj3Aruh4e01GR7Llm5G2A==, tableContent=null), ArticleFig(id=1307264129950053091, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.3, caption=
Spectral analysis and filtering curves of four segments of Si element series from the Shuanghe section(a-d) represent the spectral analysis diagrams and filtering curves in both depth domain and time domain for the four segments: -10 to 10 m, 10 to 25 m, 25 to 42 m, and 42 to 82.9 m, respectively; The filtering curves in the depth domain for the four segments are approximately 3.3 m (red) and 0.8 m (green), 2 m (red) and 0.56 m (green), 4 m (red) and 1 m (green), and 4.5 m (red) and 1.1 m (green). In the time domain, the filtering curves correspond to 405 kyr (red) and ~100 kyr (green). Bandwidth of the Gaussian bandpass filter is 20%-25% of its corresponding center frequency
, figureFileSmall=Nwq7w/pJFv3FfG4Oke0H2Q==, figureFileBig=zpdwltV8B+NX9ZQ5HUrmPA==, tableContent=null), ArticleFig(id=1307264130038133476, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图3, caption=
双河剖面的Si元素序列四段数据的频谱分析图及其滤波曲线(a~d)分别是-10~10 m、10~25 m、25~42和42~82.9 m四段的深度域和时间域的频谱分析图及其滤波曲线图;四段深度域的滤波曲线分别是3.3 m(红)和0.8 m(绿)、2 m(红)和0.56 m(绿)、4 m(红)和1 m(绿) 及4.5 m(红)和1.1 m(绿)的滤波;时间域的滤波曲线是405 kyr(红)和~100 kyr(绿)的滤波。高斯带通滤波带宽是其对应的中心频率的20%~25%
, figureFileSmall=Nwq7w/pJFv3FfG4Oke0H2Q==, figureFileBig=zpdwltV8B+NX9ZQ5HUrmPA==, tableContent=null), ArticleFig(id=1307264130101048037, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.4, caption=
Depth⁃domain Si elemental series, floating and absolute astronomical time scales (anchored at 438.47 Ma U⁃Pb age of SH⁃S1⁃1 at 54.02 m), and paleo⁃sea level reconstructed by sedimentary noise model from the Shuanghe section, figureFileSmall=fDQcoeYTSKVkrtp0ktDu7g==, figureFileBig=XguqgDJUrpXt7BPZkBG+Qw==, tableContent=null), ArticleFig(id=1307264130189128422, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图4, caption=
双河剖面的Si元素深度域序列与405 kyr天文调谐建立的浮动天文年代标尺和绝对天文年代标尺(以54.02 mSH⁃S1⁃1的U⁃Pb年龄438.47 Ma为锚点)及沉积噪音模型恢复的古海平面, figureFileSmall=fDQcoeYTSKVkrtp0ktDu7g==, figureFileBig=XguqgDJUrpXt7BPZkBG+Qw==, tableContent=null), ArticleFig(id=1307264130252042983, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.5, caption=
Integrated stratigraphy and sedimentation rate estimation of the Anwen section(a) chronostratigraphy of the Anwen section and XRF element data series,boundary ages from GTS2020; (b) COCO/eCOCO sedimentation rate estimation diagram of Si element; (c) TimeOpt analysis diagram of Si element at 25~35 m
, figureFileSmall=QjYQET0FgAq8Ojrio6ZScg==, figureFileBig=STd1w0LmC8DDtlsi3lmY+w==, tableContent=null), ArticleFig(id=1307264130335929064, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图5, caption=
安稳剖面的综合地层及沉积速率估算图(a)安稳剖面的年代地层及XRF元素数据序列,其中界线年龄来自GTS2020;(b)Si元素的COCO/eCOCO沉积速率估算分析图;(c)Si元素25~35 m的TimeOpt分析图
, figureFileSmall=QjYQET0FgAq8Ojrio6ZScg==, figureFileBig=STd1w0LmC8DDtlsi3lmY+w==, tableContent=null), ArticleFig(id=1307264130403037929, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.6, caption=
Spectral analysis and filtered curves of two segments of Si element series from the Anwen section(a, b) show the spectral analysis and filtered output curves in depth domain and time domain for the two segments of 6-18.5 m and 18.5-56.75 m, respectively; The filtered curves in depth domain for the two segments are approximately 1.6 m (red) and 0.56 m (green), and 2.5 m (red) and 0.6 m (green), respectively; The filtered curves in time domain are 405 kyr (red) and ~100 kyr (green); Bandwidth of the Gaussian bandpass filter is 20%-25% of its corresponding center frequency
, figureFileSmall=SUOXrOgEX4ZJTpEK/ZAWNg==, figureFileBig=7ZvMIN38hic0Kqv2GUfyuQ==, tableContent=null), ArticleFig(id=1307264130482729706, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图6, caption=
安稳剖面的Si元素序列两段数据的频谱分析图及其滤波曲线(a,b)是6~18.5 m和18.5~56.75 m两段的深度域和时间域的频谱分析图及其滤波曲线图;两段深度域的滤波曲线分别是1.6 m(红)和0.56 m(绿)及2.5 m(红)和0.6 m(绿)左右的滤波;时间域的滤波曲线是405 kyr(红)和~100 kyr(绿)的滤波;高斯带通滤波带宽是其对应的中心频率的20%~25%
, figureFileSmall=SUOXrOgEX4ZJTpEK/ZAWNg==, figureFileBig=7ZvMIN38hic0Kqv2GUfyuQ==, tableContent=null), ArticleFig(id=1307264130575004395, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.7, caption=
Depth⁃domain Si elemental series, floating and absolute astronomical time scales (anchored at 439.32 Ma U⁃Pb age of QJ⁃S1⁃1 at 30.6 m), and paleo⁃sea level reconstructed by sedimentary noise model from the Anwen section, figureFileSmall=vjbTZ6qcNb5jk0iqTTYhcg==, figureFileBig=yJhPAVGAu6EdjwvQ8f/gkA==, tableContent=null), ArticleFig(id=1307264130646307564, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图7, caption=
安稳剖面的Si元素深度域序列与405 kyr天文调谐建立的浮动天文年代标尺和绝对天文年代标尺(以30.6 mQJ⁃S1⁃1的U⁃Pb年龄439.32 Ma为锚点)及沉积噪音模型恢复的古海平面, figureFileSmall=vjbTZ6qcNb5jk0iqTTYhcg==, figureFileBig=yJhPAVGAu6EdjwvQ8f/gkA==, tableContent=null), ArticleFig(id=1307264130721805037, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.8, caption=
Spectral analysis and filtering curves of Rb/Sr and Ti series from the Wangjiawan section(a, b) and (c, d) Depth-domain (~0.83 m and 0.2 m) and time-domain (405 kyr and ~100 kyr) filtering curves with corresponding spectral analysis for Rb/Sr series; (e, f) and (g, h) depth-domain (~0.83 m and 0.2 m) and time-domain (405 kyr and ~100 kyr) filtering curves with corresponding spectral analysis for Ti series; Bandwidth of the Gaussian bandpass filter is 20%-25% of its corresponding center frequency
, figureFileSmall=1sKoZ/s2e4r6oDCFxuc6IQ==, figureFileBig=IrlX9apVSNart+b930waGA==, tableContent=null), ArticleFig(id=1307264130793108206, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图8, caption=
王家湾剖面的Rb/Sr和Ti元素序列频谱分析及其滤波曲线图(a,b)和(c,d)分别是Rb/Sr数据深度域(~0.83 m和0.2 m)和时间域(405 kyr和~100 kyr)的滤波及其频谱图;(e,f)和(g,h)分别是Ti元素的深度域(~0.83 m和0.2 m)和时间域(405 kyr和~100 kyr)的滤波及其频谱图;高斯带通滤波带宽是其对应的中心频率的20%~25%
, figureFileSmall=1sKoZ/s2e4r6oDCFxuc6IQ==, figureFileBig=IrlX9apVSNart+b930waGA==, tableContent=null), ArticleFig(id=1307264130856022767, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.9, caption=
Sedimentation rate estimation using COCO/eCOCO and TimeOpt methods for Rb/Sr and Ti series from the Wangjiawan section(a, b) COCO/eCOCO and TimeOpt analysis diagrams for Rb/Sr series, respectively; (c, d) COCO/eCOCO and TimeOpt analysis diagrams for Ti elemental series, respectively
, figureFileSmall=Rmj0LqpkO2R1lScpBnZ4pA==, figureFileBig=8kPIEBLl1TLJWZyXnZNugQ==, tableContent=null), ArticleFig(id=1307264130918937328, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图9, caption=
王家湾剖面的Rb/Sr值和Ti数据序列的COCO/eCOCO和TimeOpt沉积速率估算图(a,b)分别是Rb/Sr值的COCO/eCOCO和TimeOpt沉积速率模拟分析图;(c,d)分别是Ti元素序列的COCO/eCOCO和TimeOpt沉积速率模拟分析图
, figureFileSmall=Rmj0LqpkO2R1lScpBnZ4pA==, figureFileBig=8kPIEBLl1TLJWZyXnZNugQ==, tableContent=null), ArticleFig(id=1307264130977657585, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.10, caption=
Concordia diagrams (left) and weighted average age histograms (right) of CA⁃ID⁃TIMS U⁃Pb dating for volcanic ash beds in the lower part of the Longmaxi Formation at the Shuanghe section (a) and Anwen (b) section, figureFileSmall=P2Bpn1SCYYrK1+eKFyxCxA==, figureFileBig=ntwI6G/hQqUCLN3UKhZSNA==, tableContent=null), ArticleFig(id=1307264131048960754, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图10, caption=
双河剖面(a)和安稳剖面(b)龙马溪组下部地层中发育的火山灰层的CA⁃ID⁃TIMS的U⁃Pb测年谐和图(左)与年龄加权平均直方图(右), figureFileSmall=P2Bpn1SCYYrK1+eKFyxCxA==, figureFileBig=ntwI6G/hQqUCLN3UKhZSNA==, tableContent=null), ArticleFig(id=1307264131120263923, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.11, caption=
Comparison of duration between cyclostratigraphic analysis results of Si elements and absolute dating ages from the Shuanghe section and Anwen section(a) depth-domain Si elemental series with filtering curves (~4.5 m and 1.1 m) (upper) and time-domain series with filtering curves (405 kyr and ~100 kyr) (lower) from the Shuanghe section; (b) depth-domain Si elemental series with filtering curves (~2.5 m and ~0.6 m) (upper) and time-domain series with filtering curves (405 kyr and ~100 kyr) (lower) from the Anwen section; Bandwidth of the Gaussian band-pass filter is 20%-25% of its corresponding center frequency
, figureFileSmall=THpMgoD7pcOxz/hSMkBX2g==, figureFileBig=l1tmQsWmEbgRJ+2jhnMjEw==, tableContent=null), ArticleFig(id=1307264131199955700, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图11, caption=
双河和安稳剖面的Si元素旋回分析结果与绝对测年之间持续时间的对比(a)双河剖面的si元素的深度域序列及其滤波(~4.5 m和~1.1 m)曲线(上)和时间域序列及其滤波(405 kyr和~100 kyr)曲线(下);(b)安稳剖面的si元素的深度域序列及其滤波(~2.5 m和~0.6 m)曲线(上)和时间域序列及其滤波(405 kyr和~100 kyr)曲线(下);高斯带通滤波带宽是其对应的中心频率的20%~25%
, figureFileSmall=THpMgoD7pcOxz/hSMkBX2g==, figureFileBig=l1tmQsWmEbgRJ+2jhnMjEw==, tableContent=null), ArticleFig(id=1307264131292230389, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Fig.12, caption=
Comparison between U⁃Pb dating results (Zhang et al., 2025) and cyclostratigraphic analysis of Rb/Sr and Ti series in this study for the Wangjiawan section, figureFileSmall=GsLAH0oA3572ilEBc3Q6mA==, figureFileBig=IBx0R9KyMK56ufIEApELQg==, tableContent=null), ArticleFig(id=1307264131359339254, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=图12, caption=
王家湾剖面U⁃Pb测年结果(Zhang et al.,2025)与本研究该剖面的Rb/Sr和Ti序列旋回分析结果对比, figureFileSmall=GsLAH0oA3572ilEBc3Q6mA==, figureFileBig=IBx0R9KyMK56ufIEApELQg==, tableContent=null), ArticleFig(id=1307264131418059511, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Table 1, caption=
Comparison of durations of each biozone and mass extinction event obtained by U⁃Pb dating and cycle analysis
, figureFileSmall=null, figureFileBig=null, tableContent=
| 生物带 | 王家湾剖面U-Pb测年(Zhang et al.,2025)/kyr | 万和剖面U-Pb测年(Ling et al.,2019)/kyr | GTS2012/kyr | GTS2020/kyr | Zhong et al.,2020旋回分析结果/kyr | 本研究旋回分析结果 |
|---|
| 王家湾(Rb/Sr与Ti) | 双河剖面(Si)/kyr |
|---|
| 底界深度/m | 厚度/m | 时间/kyr | 底界深度/m | 厚度/m | 时间/kyr |
|---|
| PA | | | | 860 | | 3.19 | | | 31.6 | | 1 240 |
| AA | 100+300/-100 | | | 680 | | 2.93 | 0.26 | 132/130 | 25.4 | 6.2 | 1 110 |
| MP | 120+330/-120 | 270±240 | 600 | 880 | 837 | 2.62 | 0.31 | 158/178 | 20.3 | 5.1 | 1 040 |
| ME | 200+340/-200 | 200±240 | 730 | 1 260 | 388 | 2.17 | 0.45 | 226/260 | 18.6 | 1.7 | 400 |
| DM | 110+350/-110 | 270±240 | 210 | | 270 | 1.97 | 0.20 | 100/113 | | | |
| TT | 860+350/-220 | 760±280 | 970 | | 937 | 0.52 | 1.45 | 964/1 090 | 13.9 | 4.7 | 1120 |
| 下亚带 | | 210±310 | 680 | | 590 | | | | 12.8 | 1.1 | 230 |
| DC | | 460±310 | 600 | | 1 272 | | | | 10.9 | 1.9 | 470 |
| LOME I | 340+460/-340 | | | | 440 | 1.97 | 0.71 | 362/396 | 16.52 | 2.4 | 600 |
| LOME II | 60+310/-60 | | | | 540 | 2.68 | 0.18 | 81/98 | 22.16 | 1.5 | 300 |
), ArticleFig(id=1307264131514528504, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=表1, caption=
U⁃Pb测年与旋回分析获得的各生物带及大灭绝事件的持续时间对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 生物带 | 王家湾剖面U-Pb测年(Zhang et al.,2025)/kyr | 万和剖面U-Pb测年(Ling et al.,2019)/kyr | GTS2012/kyr | GTS2020/kyr | Zhong et al.,2020旋回分析结果/kyr | 本研究旋回分析结果 |
|---|
| 王家湾(Rb/Sr与Ti) | 双河剖面(Si)/kyr |
|---|
| 底界深度/m | 厚度/m | 时间/kyr | 底界深度/m | 厚度/m | 时间/kyr |
|---|
| PA | | | | 860 | | 3.19 | | | 31.6 | | 1 240 |
| AA | 100+300/-100 | | | 680 | | 2.93 | 0.26 | 132/130 | 25.4 | 6.2 | 1 110 |
| MP | 120+330/-120 | 270±240 | 600 | 880 | 837 | 2.62 | 0.31 | 158/178 | 20.3 | 5.1 | 1 040 |
| ME | 200+340/-200 | 200±240 | 730 | 1 260 | 388 | 2.17 | 0.45 | 226/260 | 18.6 | 1.7 | 400 |
| DM | 110+350/-110 | 270±240 | 210 | | 270 | 1.97 | 0.20 | 100/113 | | | |
| TT | 860+350/-220 | 760±280 | 970 | | 937 | 0.52 | 1.45 | 964/1 090 | 13.9 | 4.7 | 1120 |
| 下亚带 | | 210±310 | 680 | | 590 | | | | 12.8 | 1.1 | 230 |
| DC | | 460±310 | 600 | | 1 272 | | | | 10.9 | 1.9 | 470 |
| LOME I | 340+460/-340 | | | | 440 | 1.97 | 0.71 | 362/396 | 16.52 | 2.4 | 600 |
| LOME II | 60+310/-60 | | | | 540 | 2.68 | 0.18 | 81/98 | 22.16 | 1.5 | 300 |
), ArticleFig(id=1307264131598414585, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Table 2, caption=
Astronomical time scale and U⁃Pb datings calibrated Ordovician/Silurian boundary ages for the Shuanghe section and Anwen section
, figureFileSmall=null, figureFileBig=null, tableContent=
| 奥陶纪/志留纪界线年龄 | 双河剖面 | 安稳剖面 |
|---|
| SH-S1-2(438.42 Ma) | SH-S1-1(438.47 Ma) | QJ-S1-4(439.23 Ma) | QJ-S1-1(439.32 Ma) |
|---|
| ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr |
|---|
| 据U-Pb测年+旋回校准的界线年龄 | 442.53 | 442.34 | 443.75 | 442.89 |
443.8±1.50 Ma (GTS2012) | 4.11 | 5.38 | 3.87 | 5.33 | 4.52 | 4.57 | 3.57 | 4.48 |
443.07±0.91 Ma (GTS2020) | 4.11 | 4.65 | 3.87 | 4.60 | 4.52 | 3.84 | 3.57 | 3.75 |
), ArticleFig(id=1307264131673912058, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=表2, caption=
双河和安稳剖面的天文年代标尺和U⁃Pb测年校准的奥陶纪/志留纪界线年龄
, figureFileSmall=null, figureFileBig=null, tableContent=
| 奥陶纪/志留纪界线年龄 | 双河剖面 | 安稳剖面 |
|---|
| SH-S1-2(438.42 Ma) | SH-S1-1(438.47 Ma) | QJ-S1-4(439.23 Ma) | QJ-S1-1(439.32 Ma) |
|---|
| ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr | ATS/Myr | U-Pb/Myr |
|---|
| 据U-Pb测年+旋回校准的界线年龄 | 442.53 | 442.34 | 443.75 | 442.89 |
443.8±1.50 Ma (GTS2012) | 4.11 | 5.38 | 3.87 | 5.33 | 4.52 | 4.57 | 3.57 | 4.48 |
443.07±0.91 Ma (GTS2020) | 4.11 | 4.65 | 3.87 | 4.60 | 4.52 | 3.84 | 3.57 | 3.75 |
), ArticleFig(id=1307264131745215227, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=EN, label=Table 3, caption=
Cyclostratigraphic and U⁃Pb geochronological calibration of the top and bottom boundary ages of the Hirnantian stage
, figureFileSmall=null, figureFileBig=null, tableContent=
| 界线 | GTS2020/Ma | 王家湾剖面 同位素测年结果 (Zhang et al.,2025)/Ma | 王家湾剖面Rb/Sr旋回校准年龄/Ma(本研究) | 旋回校准年龄/Ma(本研究) |
|---|
以WJW01为锚点 (443.62 Ma) | 以WJW02为锚点 (442.66 Ma) | 以WJW03为锚点 (442.18 Ma) | 双河剖面 锚点(438.47 Ma) | 安稳剖面 锚点(439.32 Ma) |
|---|
赫南特阶顶 (奥陶纪/志留纪) | 443.07±0.91 | 442.33+0.34/-0.33 | 442.43 | 442.23 | 442.39 | 442.34 | 442.89 |
| 赫南特阶底 | 445.21±0.86 | 442.65+0.17/-0.23 | 442.82 | 442.61 | 442.78 | 443.78 | 443.45 |
), ArticleFig(id=1307264131837489916, tenantId=1146029695717560320, journalId=1301849983571558468, articleId=1301938712514945798, language=CN, label=表3, caption=
旋回和U⁃Pb测年校准赫南特阶顶底界线年龄
, figureFileSmall=null, figureFileBig=null, tableContent=
| 界线 | GTS2020/Ma | 王家湾剖面 同位素测年结果 (Zhang et al.,2025)/Ma | 王家湾剖面Rb/Sr旋回校准年龄/Ma(本研究) | 旋回校准年龄/Ma(本研究) |
|---|
以WJW01为锚点 (443.62 Ma) | 以WJW02为锚点 (442.66 Ma) | 以WJW03为锚点 (442.18 Ma) | 双河剖面 锚点(438.47 Ma) | 安稳剖面 锚点(439.32 Ma) |
|---|
赫南特阶顶 (奥陶纪/志留纪) | 443.07±0.91 | 442.33+0.34/-0.33 | 442.43 | 442.23 | 442.39 | 442.34 | 442.89 |
| 赫南特阶底 | 445.21±0.86 | 442.65+0.17/-0.23 | 442.82 | 442.61 | 442.78 | 443.78 | 443.45 |
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