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Biostromal unit from the Middle Devonian Jinbaoshi Formation, Sichuan, Southwest China: Implications for ecological structure of coeval reef communities
Huang, Jiayuan(黄家园)1,2,3; Li, Yue(李越)1,2,3; Kershaw, Stephen4,5; Guo, Wen(郭文)1,2; Liang, Kun(梁坤)1,2; Qie, Wenkun(郄文坤)1,2,3
2022-12-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume608Pages:19
Abstract

This study provides a comprehensive palaeontological and palaeoecological analysis of a middle Givetian (Middle Devonian) coral-stromatoporoid biostromal unit from the upper member of the Jinbaoshi Formation, northern Sichuan Province, Southwest China. The biostromal unit is 17.7 m of medium-to thick-bedded lime-stones, and lacks observable morphological relief in the field. Diverse shallow marine benthic fossils are common elements of the biostromal unit encompassing stromatoporoids (7 genera), tabulate corals (4 genera), brachio-pods (2 genera), plus unidentified rugose corals, chaetetids, bryozoans, tubeworms, ostracods, gastropods, cri-noids and calcimicrobes. In terms of the biotic composition and biostrome-building contributors, three ecological units are recognized: Alveolites-Clathrocoilona community (EU 1), Salairella-Pseudotrupetostroma community (EU 2) and Scoliopora-Idiostroma community (EU 3). High fragmentation of bioclasts partially with micritic envelopes in wackestone, packstone to grainstone matrix and the dominance of low-profile stromatoporoids indicate deposition in shallow water conditions with episodic high sedimentation rate and frequent turbulent periods. Muddy silt-to sandstone facies overlie the biostromal unit, and are interpreted to represent a shallowing-up sequence, together with terrigenous input, thus triggering termination of the biostromal unit. This biostromal unit is similar to the other early to middle Givetian reefs of South China, East Australia, West Europe, East Europe and North Africa in relation to their fossil composition and reef-building characteristics. The stability of the reef communities (i.e. no conspicuous extinction) and common occurrence of unusual reef structures (e.g. coverstone) are thus interpreted as significant biotic factors for the expansion of large-scale ecosystems during the Phaner-ozoic reef-building acme.

KeywordCoral-stromatoporoid biostromal unit Ecological unit Palaeoenvironment Givetian Longmenshan area
DOI10.1016/j.palaeo.2022.111272
Indexed BySCI
Language英语
WOS KeywordSTROMATOPOROID PALEOECOLOGY ; MAGNETIC-SUSCEPTIBILITY ; NORTHWEST-TERRITORIES ; MACKENZIE BASIN ; TROIS-FONTAINES ; CARBONATE ; SEDIMENTOLOGY ; PLATFORM ; SUCCESSION ; BELGIUM
Funding ProjectChinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41772004] ; China Scholarship Council[202104910277]
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000878737900001
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China ; China Scholarship Council
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/41404
Collection中国科学院南京地质古生物研究所
Corresponding AuthorLi, Yue(李越)
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 & Palaeoenvironm, Nanjing 210008, Peoples R China
3.Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China
4.Brunel Univ, Dept Life Sci, Kingston Lane, Uxbridge UB8 3PH, England
5.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironment, Nanjing 210008, 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
Huang, Jiayuan,Li, Yue,Kershaw, Stephen,et al. Biostromal unit from the Middle Devonian Jinbaoshi Formation, Sichuan, Southwest China: Implications for ecological structure of coeval reef communities[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2022,608:19.
APA Huang, Jiayuan,Li, Yue,Kershaw, Stephen,Guo, Wen,Liang, Kun,&Qie, Wenkun.(2022).Biostromal unit from the Middle Devonian Jinbaoshi Formation, Sichuan, Southwest China: Implications for ecological structure of coeval reef communities.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,608,19.
MLA Huang, Jiayuan,et al."Biostromal unit from the Middle Devonian Jinbaoshi Formation, Sichuan, Southwest China: Implications for ecological structure of coeval reef communities".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 608(2022):19.
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