气候变化领域集成服务门户(CCPortal): Upper Visean (Mississippian) metazoan-microbial reefs from Guangxi; South China: Insights regarding reef recovery after the end-Devonian extinction

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DOI	10.1016/j.palaeo.2020.109994
	Upper Visean (Mississippian) metazoan-microbial reefs from Guangxi; South China: Insights regarding reef recovery after the end-Devonian extinction
	Yao L.; Aretz M.
发表日期	2020
ISSN	0031-0182
卷号	560
英文摘要	The Mississippian was an important interval for metazoan reef recovery after the collapse of stromatoporoid-coral reef ecosystems during the Late Devonian mass extinctions. Based on field observation and quantitative studies of biotic composition in thin sections, four different reef types were identified in the upper Visean strata in the Gandongzi section of Guangxi Province, South China. These are coral reef, coral-microbial-microproblematica-bryozoan reef, coral-microbial-bryozoan reef, and microbial-bryozoan-coral reef. Their positive topographic relief from one metre to ten metres is either directly observed in the section or by correlation to the coeval non-reef facies in the adjacent Longfeng section. These reefs are constructed primarily of different proportion of colonial rugose corals (Diphyphyllum and Siphonodendron), tabulate corals (Multithecopora and Syringopora), cystoporate bryozoans (Fistulipora), and calcimicrobes (e.g., Garwoodia and Renalcis). Reef dwellers are rich and diversified including crinoids, brachiopods, bryozoans, gastropods, heterocorals, calcispheres, green algae, foraminifers, and ostracods. Their composition and abundance vary among the different reef types. Facies analysis reveals a variable composition, including framestone and bindstone in reef facies, and rudstone, grainstone, packstone, dolomitic crinoidal packstone and dolostone in the strata intercalated with reefs. The microbial reef facies is characterized by abundant spar-filled cavities, which can be classified as stromatactis and fenestral fabrics. In the non-reef facies, geopetal structures are abundant. Relative sea-level changes controlled the growth and demise of the Gandongzi reefs. They commonly grew during relative sea-level rise and died during relative sea-level fall, as evident from increasing and decreasing abundance of micrite, and decreasing and increasing abundance of cortoids, green algae and sparry calcite in reefs and their overlying strata, respectively. However, the final demise of the Gandongzi reef succession was triggered by a dramatic relative sea-level rise, indicated by increased micrite abundance associated with articulated and convex-down brachiopod shells overlying the uppermost reef. The Gandongzi reefs resemble coeval similar reef types on other palaeocontinents, in terms of reef-builder composition and internal structures. The important role of corals in the framework building of the Gandongzi reefs coincided with the late Visean coral reef proliferation, which is a major phase for re-establishment of metazoan reef ecosystems after the end-Devonian mass extinction. © 2020 Elsevier B.V.
英文关键词	Coral; Facies; Late Visean; Proliferation; Reef type; Sea level
语种	英语
scopus关键词	abundance; brachiopod; coral reef; Devonian; dolostone; mass extinction; metazoan; succession; China; Guangxi Zhuangzu; Anthozoa; Brachiopoda; Bryozoa; Chlorophyta; Foraminifera; Garwoodia; Gastropoda; Metazoa; Ostracoda; Pelmatozoa; Renalcis; Stromatoporoida
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150305
作者单位	State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China; Géosciences Environnement Toulouse, CNRS, IRD, Université de Toulouse, UPS, Toulouse, F-31400, France
推荐引用方式 GB/T 7714	Yao L.,Aretz M.. Upper Visean (Mississippian) metazoan-microbial reefs from Guangxi; South China: Insights regarding reef recovery after the end-Devonian extinction[J],2020,560.
APA	Yao L.,&Aretz M..(2020).Upper Visean (Mississippian) metazoan-microbial reefs from Guangxi; South China: Insights regarding reef recovery after the end-Devonian extinction.Palaeogeography, Palaeoclimatology, Palaeoecology,560.
MLA	Yao L.,et al."Upper Visean (Mississippian) metazoan-microbial reefs from Guangxi; South China: Insights regarding reef recovery after the end-Devonian extinction".Palaeogeography, Palaeoclimatology, Palaeoecology 560(2020).