干旱区生态环境知识资源中心(Arid): Facies and early diagenesis of rainwater-fed paleospring calcareous tufas in the Kurkur oasis area (southern Egypt)

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DOI	10.1007/s13146-022-00792-3
	Facies and early diagenesis of rainwater-fed paleospring calcareous tufas in the Kurkur oasis area (southern Egypt)
	Sallam, Emad Samir
通讯作者	Sallam, ES
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2022
卷号	37 期号:3
英文摘要	The Quaternary calcareous tufas precipitated in the Kurkur Oasis area in the southern Western Desert of Egypt were analyzed to determine their implications for the construction of environmental conditions during their formation. X-ray diffraction analysis showed that the tufas consist of low-Mg calcite, whereas macroscopic and microscopic analyses showed the presence of both allochthonous (clastic) and autochthonous components consisting predominantly of pisoliths, oncoids, intraclasts, lithoclasts, stromatolites and encrusted plant materials. These tufas form four facies associations that represent pisolitic intraclastic/lithoclastic oncoidal rudstones, phytohermal /bryophyte framestones, stromatolite-algal boundstones, and speleothem-like flowstones. These tufa associations were formed within a karstified carbonate terrain by a rainwater-fed paleospring system comprising waterfalls, slopes, dammed areas, lacustrines-paludal, and fluvial channel margin environments. Early diagenetic features are cementation, neomorphism and subaerial dissolution. Isotope-geochemical analysis indicated that the negative delta O-18 values (between - 13.26 and - 8.89 parts per thousand V-PDB) and the negative delta C-13 values (between - 3.16 and - 1.62 parts per thousand V-PDB) of the studied tufas are consistent with carbonates deposited from meteoric water in regions with much precipitation.
英文关键词	Facies analysis Depositional environments Early diagenesis Tufa Kurkur oasis
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000814278900001
WOS关键词	FRESH-WATER CARBONATES ; WESTERN DESERT ; RAPOLANO-TERME ; HOLOCENE TUFA ; IBERIAN RANGE ; ORISSA STATE ; TRAVERTINE ; DEPOSITS ; RECORDS ; SEDIMENTOLOGY
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/2XILL650/392056
推荐引用方式 GB/T 7714	Sallam, Emad Samir. Facies and early diagenesis of rainwater-fed paleospring calcareous tufas in the Kurkur oasis area (southern Egypt)[J],2022,37(3).
APA	Sallam, Emad Samir.(2022).Facies and early diagenesis of rainwater-fed paleospring calcareous tufas in the Kurkur oasis area (southern Egypt).CARBONATES AND EVAPORITES,37(3).
MLA	Sallam, Emad Samir."Facies and early diagenesis of rainwater-fed paleospring calcareous tufas in the Kurkur oasis area (southern Egypt)".CARBONATES AND EVAPORITES 37.3(2022).

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