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学科主题: Geosciences, Multidisciplinary
题名: Mississippian (Early Carboniferous) stromatolite mounds in a fore-reef slope setting, Laibin, Guangxi, South China
作者: Shen, JW ; Qing, HR
通讯作者: jwshen@scsio.ac.cn
关键词: Stromatolite ; Mounds ; Fore-reef slope setting ; Mississippian ; South China
刊名: INTERNATIONAL JOURNAL OF EARTH SCIENCES
发表日期: 2010
卷: 99, 期:2, 页:443-458
收录类别: sci
部门归属: [Shen, Jian-Wei] Chinese Acad Sci, Dept Marine Geol, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Shen, Jian-Wei] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Shen, Jian-Wei] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510301, Guangdong, Peoples R China; [Qing, Hairuo] Univ Regina, Dept Geol, Regina, SK S4S 0A2, Canada
项目归属: 海洋地质
摘要: The Mississippian (Early Carboniferous) is generally a period of scarce carbonate buildups in South China. This study documents outcrops of stromatolite mounds at Mengcun and Helv villages, in Laibin City, Guangxi Province, South China. The stromatolite mounds contain various stromatolite morphologies including laminar, wavy-laminar, domal or hemispheroidal, bulbous, and flabellate-growth columns. Intramound rocks are brachiopod floatstone and dark thin-bedded laminated micrite limestone. Individual stromatolites at Mengcun village are generally 3-6 cm thick and morphologically represent relatively shallow-water laminar (planar and wavy-undulated stromatolites) and deeper-water domal, bulbous and columnar forms. Where mounds were formed, the stromatolites continued growing upward up to 60 cm thick. Thrombolitic fabrics also occur but are not common. Stromatolite microscopic structure shows the bulk of the lamination to consist of wavy microbialite and discrete thin micritic laminae. These mounds are intercalated in deep-water fore-reef talus breccia, packstone formed as a bioclastic debris flow and thin-bedded limestone containing common chert layers of the Tatang Formation (late Vis,an). Further evidence supporting the deep-water setting of the stromatolite mounds are: (1) a laterally thinning horizon of brachiopod floatstone containing deep-water, small, thin-shelled brachiopods, peloidal micritic sediments and low-diversity, mixed fauna (e.g., thin-shelled brachiopods, tube-like worms and algae) that have been interpreted as storm deposits, (2) common fore-reef talus breccias, (3) lack of sedimentary structures indicating current action, (4) preservation of lamination with sponge spicules, and (5) lack of bioturbation suggesting that the stromatolites grew in a relatively low energy, deep-water setting. The stromatolite mounds are the first described stromatolite mounds in Mississippian strata of South China and contain evidence that supports interpretations of (1) growth history of Mississippian microbial buildups and (2) environmental controls on stromatolite growth and lithification.
原文出处: 查看原文
WOS记录号: WOS:000274385900012
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4346
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; Qing, HR.Mississippian (Early Carboniferous) stromatolite mounds in a fore-reef slope setting, Laibin, Guangxi, South China,INTERNATIONAL JOURNAL OF EARTH SCIENCES,2010,99(2):443-458
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