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Formation of molar tooth structures in low sulfate Precambrian oceans

文献类型：期刊论文

作者Liu, Yang1,5; Zhao, Mingyu4; He, Tianchen3; Li, Xingqi1; Poulton, Simon W.2
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2023-08-01
卷号354页码:62-73
ISSN号0016-7037
关键词Molar tooth structures Seawater-buffered diagenesis Seawater sulfate Mesoproterozoic Precambrian
DOI10.1016/j.gca.2023.06.013
英文摘要Molar tooth structures (MTS) comprise calcite microspar-filled voids in fine-grained shallow-water carbonate, and were commonly formed in the Mesoproterozoic and early Neoproterozoic. However, the origin of MTS and links between the temporal distribution of MTS and contemporaneous seawater chemistry remains poorly understood. Here we report elemental and isotopic data for MTS and host rocks from the Mesoproterozoic Gaoyuzhuang Formation (similar to 1,600-1,550 Ma), North China Craton. The results reveal similar C, S and Sr isotope signatures between MTS and host rocks, which are close to the isotopic compositions of contemporaneous global seawater, suggesting an early diagenetic, seawater-buffered origin for MTS. A small sulfur isotopic fractionation between seawater sulfate and pyrite (Delta S-34(CAS-Py)) of 4.1 +/- 1.5 parts per thousand in host rocks is consistent with previously reported data, providing support for sub-millimolar sulfate concentrations in Mesoproterozoic seawater. Our observations suggest that the widespread occurrence of MTS through the Mesoproterozoic to early Neoproterozoic was broadly linked to sulfate scarcity in the ocean. We further propose that in Proterozoic oceans with submillimolar seawater sulfate concentrations, where aerobic and anaerobic methane oxidation was likely inhibited, methane produced via methanogenesis may have been more prone to accumulate in sediments, creating voids during escape. The absence of MTS across periods of higher sulfate concentrations during the Palaeoproterozoic and after the mid-Neoproterozoic, suggests that elevated sulfate concentrations promoted consumption of methane via anaerobic methane oxidation, thus preventing methane accumulation and the formation of sediment voids. Rapid lithification of the substrate as a result of elevated carbonate saturation may have also hindered the formation of MTS during these intervals. The link between MTS and changes in both oceanic sulfate levels and benthic methane fluxes gives a new perspective on temporal fluctuations in Earth's redox state through time.
WOS关键词CARBONATE-ASSOCIATED SULFATE ; FERRUGINOUS CONDITIONS ; GAOYUZHUANG FORMATION ; PROTEROZOIC SEAWATER ; ISOTOPE RECORDS ; JIXIAN SECTION ; GAS BUBBLE ; SULFUR ; EVOLUTION ; OXYGEN
资助项目National Natural Science Foundation of China[42102171] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41927801] ; Fundamental Research Funds for the Central Universities[3132023159] ; 100 Talents programme of the Chinese Academy of Sciences[E251520401] ; IGGCAS Key programme[IGGCAS-202201] ; Natural Environment Research Council[NE/R010129/01]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:001035221200001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 100 Talents programme of the Chinese Academy of Sciences ; 100 Talents programme of the Chinese Academy of Sciences ; IGGCAS Key programme ; IGGCAS Key programme ; Natural Environment Research Council ; Natural Environment Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 100 Talents programme of the Chinese Academy of Sciences ; 100 Talents programme of the Chinese Academy of Sciences ; IGGCAS Key programme ; IGGCAS Key programme ; Natural Environment Research Council ; Natural Environment Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 100 Talents programme of the Chinese Academy of Sciences ; 100 Talents programme of the Chinese Academy of Sciences ; IGGCAS Key programme ; IGGCAS Key programme ; Natural Environment Research Council ; Natural Environment Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 100 Talents programme of the Chinese Academy of Sciences ; 100 Talents programme of the Chinese Academy of Sciences ; IGGCAS Key programme ; IGGCAS Key programme ; Natural Environment Research Council ; Natural Environment Research Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/111328]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Liu, Yang
作者单位1.China Univ Geosci Beijing, Sch Energy Resource, Beijing 100083, Peoples R China
2.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, England
3.Hohai Univ, Coll Oceanog, Nanjing 210024, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
5.Dalian Maritime Univ, Coll Environm Sci & Engn, Dalian 116026, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yang,Zhao, Mingyu,He, Tianchen,et al. Formation of molar tooth structures in low sulfate Precambrian oceans[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2023,354:62-73.
APA Liu, Yang,Zhao, Mingyu,He, Tianchen,Li, Xingqi,&Poulton, Simon W..(2023).Formation of molar tooth structures in low sulfate Precambrian oceans.GEOCHIMICA ET COSMOCHIMICA ACTA,354,62-73.
MLA Liu, Yang,et al."Formation of molar tooth structures in low sulfate Precambrian oceans".GEOCHIMICA ET COSMOCHIMICA ACTA 354(2023):62-73.

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来源：地质与地球物理研究所

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