干旱区生态环境知识资源中心(Arid): Factors governing travertine deposition in fluvial systems: The Bagni San Filippo (central Italy) case study

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DOI	10.1016/j.sedgeo.2021.106023
	Factors governing travertine deposition in fluvial systems: The Bagni San Filippo (central Italy) case study
	Luo, Lianchao; Capezzuoli, Enrico; Vaselli, Orlando; Wen, Huaguo; Lazzaroni, Marta; Lu, Zhipeng; Meloni, Federica; Kele, Sandor
通讯作者	Luo, LC (corresponding author), Univ Florence, Dept Earth Sci, I-50121 Florence, Italy.
来源期刊	SEDIMENTARY GEOLOGY
ISSN	0037-0738
EISSN	1879-0968
出版年	2021
卷号	426
英文摘要	Although fossil fluvial travertines have been described, factors controlling their formation are poorly understood because of the paucity of their modern counterparts. To disclose processes affecting their deposition, a modern fluvial travertine system at Bagni San Filippo (Siena, central Italy) was studied here and compared with other cases. The studied travertines occur in a valley with an ephemeral stream, but continuous water influx from hot springs on the hillside makes part of the stream become perennial. Four sub-environments were recognized: slopes, waterfalls, pools, and channels. The first two are mainly composed of laminated crystalline crust-boundstone. In contrast, pools are mainly covered by lime mud and some post-flood travertine-encrusted breccia, while channels commonly display abundant travertine-encrusted breccia. Many erosional features and products were also found and are largely the result of episodic erosion triggered by heavy rainfalls and accompanied floods. The predominant erosional processes might include abrasion and plucking. Based on environment distribution, stream bed morphology, and erosional distinctions, the fluvial system was distinguished into slope-pool-waterfall and channel-pool-waterfall subsystems. Such system differentiation is attributed to the original stream bed difference: wide beds promoted the development of slopes, while narrow beds encouraged travertine erosion and subsequent gravel accumulation during flood events, favoring the formation of channels. The comparison shows that fluvial travertine deposition largely occurs within existing rivers. The relative contribution of spring water to original river water controls the deposit composition (the higher contribution ratios, the more abundant carbonate/travertine facies). Furthermore, erosion might be common and unavoidable because the reported fluvial travertines were all formed in non-arid regions. These findings suggest that fluvial travertine deposition is influenced by topography, hot spring contribution, original river bed geometry, and fluvial erosion, and might aid in the interpretation of ancient fluvial travertine systems. Additionally, downstream fluvial travertine systems might show similar characteristics to fluvial tufas, but their formation is clearly hot spring influenced, indicating the importance of analyzing facies distribution and delta C-13-delta O-18 signatures in fluvial carbonate studies. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Fluvial travertine C-O stable isotopes Hot spring Erosion Central Italy
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000715824900003
WOS关键词	BEDROCK RIVER INCISION ; HOT-SPRINGS ; NORTHERN APENNINES ; THERMAL SPRINGS ; GEOCHEMICAL CHARACTERISTICS ; EROSION THRESHOLDS ; YUNNAN PROVINCE ; TUFA DEPOSITS ; ROCK STRENGTH ; IBERIAN RANGE
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368129
作者单位	[Luo, Lianchao; Capezzuoli, Enrico; Vaselli, Orlando; Lazzaroni, Marta] Univ Florence, Dept Earth Sci, I-50121 Florence, Italy; [Vaselli, Orlando; Lazzaroni, Marta] CNR IGG Inst Geosci & Earth Resources, I-50121 Florence, Italy; [Wen, Huaguo] Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China; [Wen, Huaguo; Lu, Zhipeng] Chengdu Univ Technol, Inst Sedimentary Geol, Chengdu 610059, Peoples R China; [Meloni, Federica] INSTM Natl Interuniv Consortium Mat Sci & Technol, Via Giusti 9, I-50121 Florence, Italy; [Kele, Sandor] Res Ctr Astron & Earth Sci, Inst Geol & Geochem Res, H-1112 Budapest, Hungary
推荐引用方式 GB/T 7714	Luo, Lianchao,Capezzuoli, Enrico,Vaselli, Orlando,et al. Factors governing travertine deposition in fluvial systems: The Bagni San Filippo (central Italy) case study[J],2021,426.
APA	Luo, Lianchao.,Capezzuoli, Enrico.,Vaselli, Orlando.,Wen, Huaguo.,Lazzaroni, Marta.,...&Kele, Sandor.(2021).Factors governing travertine deposition in fluvial systems: The Bagni San Filippo (central Italy) case study.SEDIMENTARY GEOLOGY,426.
MLA	Luo, Lianchao,et al."Factors governing travertine deposition in fluvial systems: The Bagni San Filippo (central Italy) case study".SEDIMENTARY GEOLOGY 426(2021).