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Reconstructing Tonian seawater Sr-87/Sr-86 using calcite microspar
Zhou, Ying1,2; von Strandmann, Philip A. E. Pogge1,2; Zhu, Maoyan (朱茂炎)3,4,5; Ling, Hongfei6; Manning, Christina7; Li, Da6,9; He, Tianchen8; Shields, Graham A.1,2
2020-05-01
Source PublicationGEOLOGY
ISSN0091-7613
Volume48Issue:5Pages:462-467
Abstract

The Tonian Period followed a long interval of relative stasis and led into the climatic -extremes and biological radiations of multicellular life during the Cryogenian and Ediacaran Periods, respectively. However, despite its pivotal situation, it remains relatively understudied, in large part due to the lack of robust age constraints. A combination of fossil evidence, radiometric ages, and isotopic constraints reveal that carbonate strata on the North China craton were deposited between ca. 980 and ca. 920 Ma, thereby filling a gap in marine archives. Here we present Sr-87/Sr-86 data from selected calcite microspar cements, which filled early diagenetic "molar tooth" cracks, along with data from demonstrably well-preserved bulk carbonate samples. These new data show that seawater Sr-87/Sr-87 rose in stages from similar to 0.7052 at ca. 980 Ma to similar to 0.7063 by ca. 920 Ma, after which a return to low values coincided with the eruption of the Dashigou large igneous province across the North China craton. We also present a new Neoproterozoic seawater Sr-87/Sr-86 curve, which reveals that the general trend toward higher Sr-87/Sr-87 during the Tonian Period was checked repeatedly by the input of less-radiogenic strontium from a series of eruptive events, both coincident with and prior to the main breakup of Rodinia. The weathering of Tonian volcanic provinces has been linked to higher carbon burial, glaciation, and oxygenation due to the high phosphorus content of flood basalts. Here we show that the weathering of major volcanic provinces affected material fluxes and ocean chemistry much earlier than previously envisaged.

DOI10.1130/G46756.1
Indexed BySCI
Language英语
WOS KeywordNORTH CHINA CRATON ; ORGANIC-WALLED MICROFOSSILS ; U-PB ; STRONTIUM ISOTOPES ; EVOLUTION ; SR ; GEOCHEMISTRY ; PROVINCES ; RODINIA ; MARGIN
Funding ProjectUK Natural Environment Research Council-National Natural Sciences Foundation of China (NSFC)[NE/1005978/1] ; UK Natural Environment Research Council-National Natural Sciences Foundation of China (NSFC)[41661134048] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; NSFC[41672026]
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000529525600011
Funding OrganizationUK Natural Environment Research Council-National Natural Sciences Foundation of China (NSFC) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; NSFC
PublisherGEOLOGICAL SOC AMER, INC
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/31897
Collection中国科学院南京地质古生物研究所
Corresponding AuthorZhou, Ying; Zhu, Maoyan (朱茂炎)
Affiliation1.UCL, London Geochem & Isotope Ctr, Inst Earth & Planetary Sci, Gower St, London WC1E 6BT, England
2.Birkbeck Univ London, Gower St, London WC1E 6BT, England
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Nanjing Univ, Sch Earth Sci, Nanjing 210023, Peoples R China
7.Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England
8.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
9.Nanjing Normal Univ, Sch Marine Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Zhou, Ying,von Strandmann, Philip A. E. Pogge,Zhu, Maoyan ,et al. Reconstructing Tonian seawater Sr-87/Sr-86 using calcite microspar[J]. GEOLOGY,2020,48(5):462-467.
APA Zhou, Ying.,von Strandmann, Philip A. E. Pogge.,Zhu, Maoyan .,Ling, Hongfei.,Manning, Christina.,...&Shields, Graham A..(2020).Reconstructing Tonian seawater Sr-87/Sr-86 using calcite microspar.GEOLOGY,48(5),462-467.
MLA Zhou, Ying,et al."Reconstructing Tonian seawater Sr-87/Sr-86 using calcite microspar".GEOLOGY 48.5(2020):462-467.
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