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Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation

文献类型：期刊论文

作者Yang, Shengchao11,12; Fan, Junxuan10,11,12; Algeo, Thomas J.7,8,9; Shields, Graham A.; Zhou, Ying6; Li, Chao2,3,4,5; Chen, Jitao1; Li, Weiqiang11,12; Li, Na11,12; Cao, Jian11,12
刊名EARTH-SCIENCE REVIEWS
出版日期2024-08-01
卷号255页码:10
关键词Ordovician HICE Carbon cycle Ice age Dissolved inorganic carbon
ISSN号0012-8252
DOI10.1016/j.earscirev.2024.104840
通讯作者Fan, Junxuan(jxfan@nju.edu.cn) ; Li, Chao(chaoli@cdut.edu.cn)
英文摘要The Hirnantian carbon isotopic excursion (HICE) was characterized by a positive delta C-13 excursion (up to similar to + 7 parts per thousand) of oceanic dissolved inorganic carbon (DIC). However its mechanism remains controversial, impeding our understanding of this global event and its environmental significance. Here, we conducted a comprehensive analysis of global carbon-isotope records, based on 65 paleogeographically-widely distributed sections (4612 carbon-isotope data), documenting a steep oceanic DIC delta C-13 water-depth gradient (e.g., a 4.6 parts per thousand offset in the HICE excursion magnitude within Laurentia) during the Hirnantian Stage. We propose a hybrid hypothesis that the HICE records a shift toward more positive values owing to a large glacio-eustatic fall (>100 m) under the herein-identified steep delta C-13 water-depth gradient, with potential contributions from global-ocean delta C-13(DIC) changes and authigenic carbonates. This study provides the first large-data evidence for a widely density-stratified ocean during the Hirnantian Glaciation, with implications for reconstructions of ocean circulation and the carbon cycle during the Early Paleozoic.
WOS关键词ORDOVICIAN-SILURIAN BOUNDARY ; CARBON-ISOTOPE STRATIGRAPHY ; SEA-LEVEL ; LATEST ORDOVICIAN ; REDOX CONDITIONS ; MASS EXTINCTION ; SOUTH CHINA ; ENVIRONMENTAL-CHANGES ; BLACK-SEA ; DIAGENESIS
资助项目National Natural Science Foundation of China[42102147] ; National Natural Science Foundation of China[92255301] ; National Natural Science Foundation of China[41821001] ; China Postdoctoral Science Foundation[2022M711547] ; Fundamental Research Funds for the Central Universities[0206-14380146] ; Fundamental Research Funds for the Central Universities[0206-14380168] ; Program A for Outstanding PhD Candidate of Nanjing University[201901A008] ; NERC[NE/P013643/1] ; Rocks and the Rise of Ordovician Life Project[IGCP 735]
WOS研究方向Geology
语种英语
WOS记录号WOS:001258725300001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities ; Program A for Outstanding PhD Candidate of Nanjing University ; NERC ; Rocks and the Rise of Ordovician Life Project
源URL[http://ir.nigpas.ac.cn/handle/332004/43951]  
专题中国科学院南京地质古生物研究所
通讯作者Fan, Junxuan; Li, Chao
作者单位1.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Chengdu Univ Technol, Int Ctr Sedimentary Geochem & Biogeochem Res, Chengdu 610059, Peoples R China
3.Chengdu Univ Technol, Key Lab Deep time Geog & Environm Reconstruct & Ap, Minist Nat Resources, Chengdu 610059, Peoples R China
4.Chengdu Univ Technol, Inst Sedimentary Geol, Chengdu 610059, Peoples R China
5.Chengdu Univ Technol, State Key Lab Oil Gas Reservoir Geol & Exploitat, Chengdu 610059, Peoples R China
6.UCL, Dept Earth Sci, London WC1E 6BT, England
7.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
8.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
9.Univ Cincinnati, Dept Geosci, Cincinnati, OH 45221 USA
10.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Shengchao,Fan, Junxuan,Algeo, Thomas J.,et al. Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation[J]. EARTH-SCIENCE REVIEWS,2024,255:10.
APA Yang, Shengchao.,Fan, Junxuan.,Algeo, Thomas J..,Shields, Graham A..,Zhou, Ying.,...&Shen, Shuzhong.(2024).Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation.EARTH-SCIENCE REVIEWS,255,10.
MLA Yang, Shengchao,et al."Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation".EARTH-SCIENCE REVIEWS 255(2024):10.

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来源：南京地质古生物研究所

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