干旱区生态环境知识资源中心(Arid): A wet climatic terrestrial carbonate record in the middle-upper Pleistocene, north Tunisia

Arid

DOI	10.1007/s10347-020-00612-x
	A wet climatic terrestrial carbonate record in the middle-upper Pleistocene, north Tunisia
	Armenteros, Ildefonso; Ghannem, Naoufel
通讯作者	Armenteros, I
来源期刊	FACIES
ISSN	0172-9179
EISSN	1612-4820
出版年	2020
卷号	67 期号:1
英文摘要	The middle-upper Pleistocene Borj Edouane unit records a singular spectrum of terrestrial carbonates in a shallow depression on Cretaceous rocks in north Tunisia. This study aims to decipher the depositional system and reveal the climatic and paleohydrological conditions of the carbonate facies deposition. They are grouped into two facies associations: (1) a calcrete-palustrine and (2) a composite microbialite-travertine, surrounded by a marginal alluvial association along the western and northern borders of the basin. The calcrete-palustrine association extends along the westernmost south-north strip of the basin, reflecting calcrete development on distal alluvial fan deposits and pedogenic modification (palustrine facies) of shallow fresh-water carbonates. The composite microbialite-travertine, extending along north-south strips in the middle and eastern areas of the basin, consists of microbialite, clastic microbialite-travertine, and travertine associations. Microbialites were developed in fluvio-lacustrine environments within the central strip and pass eastward into the travertines through the clastic microbialite-travertine association. The latter was deposited from currents and in shallow ponds along a bench next to the travertine-depositing springs, linked to a fault system in the eastern margin of the basin. The carbonate depositional system shows an asymmetrical distribution of facies that parallels the paleohydrological asymmetry along the basin. Water supply was restricted in the western part of the basin and abundant in its eastern areas linked to spring waters that kept stable lake levels in the basin center, favoring the genesis of microbialites. The presence of lacustrine carbonates in the studied area indicates higher water availability during the Middle-Late Pleistocene and that climate in North Africa was wetter than today.
英文关键词	Calcrete Palustrine Laminar crusts Microbialites Travertine Paleoclimate
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000589091800001
WOS关键词	WESTERN DESERT ; TUFA DEPOSITS ; KHARGA OASIS ; TRAVERTINE ; BASIN ; STROMATOLITES ; CONSTRAINTS ; EVOLUTION ; PHASES ; LAKE
WOS类目	Geology ; Paleontology
WOS研究方向	Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327488
作者单位	[Armenteros, Ildefonso] Salamanca Univ, Dept Geol, Fac Sci, Salamanca 37071, Spain; [Ghannem, Naoufel] Univ Carthage, Fac Sci Bizerte, Zarzouna 7021, Tunisia
推荐引用方式 GB/T 7714	Armenteros, Ildefonso,Ghannem, Naoufel. A wet climatic terrestrial carbonate record in the middle-upper Pleistocene, north Tunisia[J],2020,67(1).
APA	Armenteros, Ildefonso,&Ghannem, Naoufel.(2020).A wet climatic terrestrial carbonate record in the middle-upper Pleistocene, north Tunisia.FACIES,67(1).
MLA	Armenteros, Ildefonso,et al."A wet climatic terrestrial carbonate record in the middle-upper Pleistocene, north Tunisia".FACIES 67.1(2020).