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Siliceous microfossils as a potential age marker for the early Hirnantian Mass Extinction horizon in South China
Wu, Xuejin(吴学进)1,2,3; Luo, Hui(罗辉)1,2; Zhang, Yuandong (张元动)1,2,3; Li, Chao(李超)1,2,3
2021-01-02
Source PublicationALCHERINGA
ISSN0311-5518
Volume45Issue:1Pages:77-85
Abstract

Abundant cone-shaped siliceous microfossils have been recovered from Upper Ordovician black shales of the Wufeng Formation in South China. They occur in the Hirnantian Metabolograptus extraordinarius Biozone. An investigation of their internal structure conducted using focused ion beam-scanning electron microscope (FIB-SEM) and transmitted light microscope shows that the specimens are possibly composed of three parts: cephalis, thorax and foot. Robust, longitudinal costae are developed, sometimes branching at the thorax. The geological distribution of these microfossils in South China indicates that they occurred in a restricted epicontinental sea on the Upper Yangtze Platform, which was connected to the open ocean in the north. It seems likely that these microfossils have a limited temporal range relative to the Late Ordovician Mass Extinction (LOME) in the early Hirnantian. In the absence of coeval graptolites or other index fossils, their occurrence therefore provides an age marker for the LOME, and has utility for future shale gas exploration in the Wufeng Formation. Xuejin Wu [], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, PR China; University of Science and Technology of China, Hefei, 230026, PR China; *Hui Luo* [], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, PR China; *Yuandong Zhang [], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Chao Li [], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.

KeywordHirnantian Wufeng Formation shale gas FIB-SEM age marker
DOI10.1080/03115518.2021.1914728
Indexed BySCI
Language英语
WOS KeywordYANGTZE REGION ; ORDOVICIAN
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000670108000004
PublisherTAYLOR & FRANCIS LTD
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38379
Collection中国科学院南京地质古生物研究所
Corresponding AuthorWu, Xuejin(吴学进)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Wu, Xuejin,Luo, Hui,Zhang, Yuandong ,et al. Siliceous microfossils as a potential age marker for the early Hirnantian Mass Extinction horizon in South China[J]. ALCHERINGA,2021,45(1):77-85.
APA Wu, Xuejin,Luo, Hui,Zhang, Yuandong ,&Li, Chao.(2021).Siliceous microfossils as a potential age marker for the early Hirnantian Mass Extinction horizon in South China.ALCHERINGA,45(1),77-85.
MLA Wu, Xuejin,et al."Siliceous microfossils as a potential age marker for the early Hirnantian Mass Extinction horizon in South China".ALCHERINGA 45.1(2021):77-85.
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