干旱区生态环境知识资源中心(Arid): Sedimentology and isotope geochemistry of transitional evaporitic environments within arid continental settings: From erg to saline lakes

Arid

DOI	10.1111/sed.12816
	Sedimentology and isotope geochemistry of transitional evaporitic environments within arid continental settings: From erg to saline lakes
	Pettigrew, Ross P.; Priddy, Charlotte; Clarke, Stuart M.; Warke, Matthew R.; Stueken, Eva E.; Claire, Mark W.
通讯作者	Pettigrew, RP (corresponding author), Keele Univ, Sch Geog Geol & Environm, Basin Dynam Res Grp, Keele ST5 5BG, Staffs, England.
来源期刊	SEDIMENTOLOGY
ISSN	0037-0746
EISSN	1365-3091
出版年	2021
卷号	68 期号:3 页码:907-942
英文摘要	Arid continental basins typically contain a spectrum of coeval environments that coexist and interact from proximal to distal. Within the distal portion, aeolian ergs often border playa, or perennial, desert lakes, fed by fluvial incursions or elevated groundwaters. Evaporites are common features in these dryland, siliciclastic dominant settings. However, sedimentary controls upon evaporite deposition are not widely understood, especially within transitional zones between coeval clastic environments that are dominantly controlled by larger scale allocyclic processes, such as climate. The sulphur (delta S-34) and oxygen (delta O-18, Delta O-17) isotope systematics of evaporites can reveal cryptic aspects of sedimentary cycling and sulphate sources in dryland settings. However, due to the lack of sedimentological understanding of evaporitic systems, isotopic data can be easily misinterpreted. This work presents detailed sedimentological and petrographic observations, coupled with delta S-34, delta O-18 and Delta O-17 data, for the early Permian Cedar Mesa Sandstone Formation (western USA). Depositional models for mixed evaporitic/clastic sedimentation, which occurs either in erg-marginal or lacustrine-marginal settings, are presented to detail the sedimentary interactions present in terms of climate variations that control them. Sedimentological and petrographical analysis of the evaporites within the Cedar Mesa Sandstone Formation reveal a continental depositional environment and two end member depositional models have been developed: erg-margin and lake-margin. The delta S-34 values of gypsum deposits within the Cedar Mesa Sandstone Formation are consistent with late Carboniferous to early Permian marine settings. However, a marine interpretation is inconsistent with sedimentological and petrographic evidence. Consequently, delta S-34, delta O-18 and Delta O-17 values are probably recycled and do not reflect ocean-atmosphere values at the time of evaporite precipitation. They are most likely derived from the weathering of older marine evaporites in the hinterland. Thus, the results demonstrate the need for a combination of both sedimentological and geochemical analysis of evaporitic systems to better understand their depositional setting and conditions.
英文关键词	Aeolian Cedar Mesa Sandstone gypsum playa lakes Δ O-17 δ S-34
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000600250500001
WOS关键词	FLUVIAL-AEOLIAN INTERACTIONS ; PERMIAN NIPPEWALLA GROUP ; CEDAR-MESA SANDSTONE ; LOWER CUTLER BEDS ; PARADOX BASIN ; STRATIGRAPHIC EVOLUTION ; BOUNDING SURFACES ; TRIPLE OXYGEN ; NEW-MEXICO ; LACUSTRINE EVAPORITES
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/2XILL650/351752
作者单位	[Pettigrew, Ross P.; Priddy, Charlotte; Clarke, Stuart M.] Keele Univ, Sch Geog Geol & Environm, Basin Dynam Res Grp, Keele ST5 5BG, Staffs, England; [Warke, Matthew R.; Stueken, Eva E.; Claire, Mark W.] Univ St Andrews, Sch Earth & Environm Sci, St Andrews KY16 9AL, Fife, Scotland
推荐引用方式 GB/T 7714	Pettigrew, Ross P.,Priddy, Charlotte,Clarke, Stuart M.,et al. Sedimentology and isotope geochemistry of transitional evaporitic environments within arid continental settings: From erg to saline lakes[J],2021,68(3):907-942.
APA	Pettigrew, Ross P.,Priddy, Charlotte,Clarke, Stuart M.,Warke, Matthew R.,Stueken, Eva E.,&Claire, Mark W..(2021).Sedimentology and isotope geochemistry of transitional evaporitic environments within arid continental settings: From erg to saline lakes.SEDIMENTOLOGY,68(3),907-942.
MLA	Pettigrew, Ross P.,et al."Sedimentology and isotope geochemistry of transitional evaporitic environments within arid continental settings: From erg to saline lakes".SEDIMENTOLOGY 68.3(2021):907-942.