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Sedimentology and chemostratigraphy of the terminal Ediacaran Dengying Formation at the Gaojiashan section, South China
Cui, Huan (崔欢)1,2,3,4,10,11; Xiao, Shuhai5; Cai, Yaoping6; Peek, Sara4,7; Plummer, Rebecca E.4,8; Kaufman, Alan J.4,9
2019-11-01
Source PublicationGEOLOGICAL MAGAZINE
ISSN0016-7568
Volume156Issue:11Pages:1924-1948
Abstract

The terminal Ediacaran Dengying Formation (c. 551.1-538.8 Ma) in South China is one of two successions where Ediacara-type macrofossils are preserved in carbonate facies along with skeletal fossils and bilaterian animal traces. Given the remarkable thickness of carbonate-bearing strata deposited in less than 12.3 million years, the Dengying Formation holds the potential for construction of a relatively continuous chemostratigraphic profile for the terminal Ediacaran Period. In this study, a detailed sedimentological and chemostratigraphic (delta 13C(carb), delta O-18(carb), delta C-13(org), delta S-34(pyrite), and Sr-87/Sr-86) investigation was conducted on the Dengying Formation at the Gaojiashan section, Ningqiang County of southern Shaanxi Province, South China. Sedimentological results reveal an overall shallow-marine depositional environment. Carbonate breccia, void-filling botryoidal precipitates and aragonite crystal fans are common in the Algal Dolomite Member of the Dengying Formation, suggesting that peritidal facies were repeatedly karstified. The timing of karstification was likely early, probably soon after the deposition of the dolomite sediments. The presence of authigenic aragonite cements suggests high alkalinity in the terminal Ediacaran ocean. Geochemical analysis of micro-drilled samples shows that distinct compositions are registered in different carbonate phases, which should be considered when constructing chemostratigraphic profiles representative of true temporal variations in seawater chemistry. Integrated chemostratigraphic data suggest enhanced burial of organic carbon and pyrite, and the occurrence of extensive marine anoxia (at least in the Gaojiashan Member). Rapid basinal subsidence and carbonate accumulation during a time of elevated seawater alkalinity and increased rates of pyrite burial may have facilitated the evolutionary innovation of early biomineralizing metazoans.

Keywordgeobiology animal biomineralization authigenesis aragonite karstification alkalinity Cloudina
DOI10.1017/S0016756819000293
Language英语
WOS KeywordPROTEROZOIC NAMA GROUP ; NORTHERN YANGTZE PLATFORM ; GAOSHITI-MOXI AREA ; SICHUAN BASIN ; DOUSHANTUO FORMATION ; ISOTOPIC EVIDENCE ; SULFUR ISOTOPES ; OLDEST EVIDENCE ; OLENEK UPLIFT ; DEATH-VALLEY
Funding ProjectUMD Geology Department ; NASA Astrobiology Institute at UW-Madison ; ET-HOME (Evolution and Tracers of the Habitability of Mars and Earth) Astrobiology Research Consortium in Belgium ; Analytical, Environmental and Geo-Chemistry research group at VUB ; American Association of Petroleum Geologists (AAPG) Grants-In-Aid Program Marilyn Atwater Memorial Grant ; Explorers Club Washington Group ; open research grant of the State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[193107] ; NASA Exobiology grant[NNX12AR91G] ; NASA Exobiology grant[80NSSC18K1086] ; NSF Sedimentary Geology and Palaeontology grant[EAR0844270] ; NSF Sedimentary Geology and Palaeontology grant[EAR1528553] ; Young Scientists Fund of Shaanxi Province[2015KJXX-26]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000504084300007
Funding OrganizationUMD Geology Department ; NASA Astrobiology Institute at UW-Madison ; ET-HOME (Evolution and Tracers of the Habitability of Mars and Earth) Astrobiology Research Consortium in Belgium ; Analytical, Environmental and Geo-Chemistry research group at VUB ; American Association of Petroleum Geologists (AAPG) Grants-In-Aid Program Marilyn Atwater Memorial Grant ; Explorers Club Washington Group ; open research grant of the State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences ; NASA Exobiology grant ; NSF Sedimentary Geology and Palaeontology grant ; Young Scientists Fund of Shaanxi Province
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29859
Collection中国科学院南京地质古生物研究所
Corresponding AuthorCui, Huan (崔欢)
Affiliation1.Vrije Univ Brussel, Div Earth Syst Sci, Res Grp Analyt Environm & GeoChem, B-1050 Brussels, Belgium
2.ET Home Evolut & Tracers Habitabil Mars & Earth A, Brussels, Belgium
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
4.Univ Maryland, Dept Geol, College Pk, MD 20742 USA
5.Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA
6.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Shaanxi Key Lab Early Life & Environm, Xian 710069, Shaanxi, Peoples R China
7.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA
8.USDA, Hydrol & Remote Sensing Lab, Beltsville Agr Res Ctr, Beltsville, MD 20705 USA
9.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
10.Vrije Univ Brussel, Environm & Geochem Res Grp, Brussels, Belgium
11.Vrije Univ Brussel, ET Home Astrobiol Res Consortium, Brussels, Belgium
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Cui, Huan ,Xiao, Shuhai,Cai, Yaoping,et al. Sedimentology and chemostratigraphy of the terminal Ediacaran Dengying Formation at the Gaojiashan section, South China[J]. GEOLOGICAL MAGAZINE,2019,156(11):1924-1948.
APA Cui, Huan ,Xiao, Shuhai,Cai, Yaoping,Peek, Sara,Plummer, Rebecca E.,&Kaufman, Alan J..(2019).Sedimentology and chemostratigraphy of the terminal Ediacaran Dengying Formation at the Gaojiashan section, South China.GEOLOGICAL MAGAZINE,156(11),1924-1948.
MLA Cui, Huan ,et al."Sedimentology and chemostratigraphy of the terminal Ediacaran Dengying Formation at the Gaojiashan section, South China".GEOLOGICAL MAGAZINE 156.11(2019):1924-1948.
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