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学科主题: Geology
题名: Famennian (Upper Devonian) stromatolite reefs at Shatang, Guilin, Guangxi, South China
作者: Shen, JW ; Webb, GE
通讯作者: jwshen@scsio.ac.cn
关键词: Devonian ; Famennian ; Guilin ; reef ; stromatolite ; microbial
刊名: SEDIMENTARY GEOLOGY
发表日期: 2004
卷: 170, 期:40545, 页:63-84
收录类别: sci
部门归属: Chinese Acad Sci, China Sea Inst Oceanol S, Dept Marine Geol, Guangzhou 510301, Peoples R China; Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou 510301, Peoples R China; Queensland Univ Technol, Sch Nat Resource Sci, Brisbane, Qld 4001, Australia
项目归属: 海洋地质
摘要: Stromatolites occurred in many reef complexes throughout the Phanerozoic, and microbial communities played an important role in both ancient and modem stromatolite reefs. Famennian (Upper Devonian) limestone outcrops at Shatang, northwest of Guilin, South China contain stromatolite reefs. Calcimicrobes and algae are also abundant in the reef limestones, highlighting the importance of microbial communities in initial reef formation after the Frasnian/Famennian biotic crisis. In some cases, the Shatang stromatolites are connected to form a rigid framework, showing a significant ability for construction of biohermal reefs; and in other cases, they occur as isolated structures. The cores of stromatolite reefs were formed by massive limestone containing columnar and dichotomous branching stromatolites. Calcimicrobes and algae (e.g., Solenopora, Parachaetetes, Garwoodia, and problematic forms) are also common. Some of the calcimicrobes formed stromatolites, and other calcimicrobes played a role in sediment stabilization and were more common in biostromal thickets. Shatang stromatolitic reefs grew on a shoal deposit composed of sand- and pebble-sized bioclasts. Field observation and facies analysis suggest that Shatang stromatolitic reefs formed platform margin facies, which, together with previously described Renalcis-Epiphyton reefs, Renalcis reefs, ooid shoals, brachiopod-shell shoals, and nautiloid shoals, rimmed the northwest part of the Guilin carbonate platform. The fossil microbial/algal communities, together with a complex of sedimentary features, allow reconstruction of the depositional history of the environment. Based on comparison with coeval reefs in the Guilin area and the previously developed regional tectonic history, a model is proposed describing the sedimentary history of Famennian reefs in Guilin. Interpretation of the Shatang stromatolites as disaster biota is equivocal, as other factors may also have influenced the abundance and type of microbialites in shallow-platform margin reef settings in the Late Devonian. (C) 2004 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000223525900004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4790
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Shen, JW; Webb, GE.Famennian (Upper Devonian) stromatolite reefs at Shatang, Guilin, Guangxi, South China,SEDIMENTARY GEOLOGY,2004,170(40545):63-84
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