干旱区生态环境知识资源中心(Arid): Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara

Arid

DOI	10.1029/2021JE007087
	Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara
	Zaki, A. S.; Davis, J. M.; Edgett, K. S.; Giegengack, R.; Roige, M.; Conway, S.; Schuster, M.; Gupta, S.; Salese, F.; Sangwan, K. S.; Fairen, A. G.; Hughes, C. M.; Pain, C. F.; Castelltort, S.
通讯作者	Zaki, AS
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
ISSN	2169-9097
EISSN	2169-9100
出版年	2022
卷号	127 期号:5
英文摘要	A widely hypothesized but complex transition from widespread fluvial activity to predominantly aeolian processes is inferred on Mars based on remote sensing data observations of ancient landforms. However, the lack of analysis of in situ martian fluvial deposits hinders our understanding of the flow regime nature and sustainability of the martian fluvial activity and the hunt for ancient life. Studying analogs from arid zones on Earth is fundamental to quantitatively understanding geomorphic processes and climate drivers that might have dominated during early Mars. Here we investigate the formation and preservation of fluvial depositional systems in the eastern Sahara, where the largest arid region on Earth hosts important repositories of past climatic changes. The fluvial systems are composed of well-preserved single-thread sinuous to branching ridges and fan-shaped deposits interpreted as deltas. The systems' configuration and sedimentary content suggest that ephemeral rivers carved these landforms by sequential intermittent episodes of erosion and deposition active for 10-100s years over similar to 10,000 years during the late Quaternary. Subsequently, these landforms were sculpted by a marginal role of rainfall and aeolian processes with minimum erosion rates of 1.1 +/- 0.2 mm/yr, supplying similar to 96 +/- 24 x 10(10) m(3) of disaggregated sediment to adjacent aeolian dunes. Our results imply that similar martian fluvial systems preserving single-thread, short distance source-to-sink courses may have formed due to transient drainage networks active over short durations. Altogether, this study adds to the growing recognition of the complexity of interpreting climate history from orbital images of landforms.
英文关键词	fluvial ridges inverted channels relief inversion african humid period deltas earth analogs
类型	Article
语种	英语
开放获取类型	Green Accepted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000798250800001
WOS关键词	SOUTHEASTERN WESTERN DESERT ; AEOLIS DORSA ; CLIMATE ; BASIN ; RIVER ; PALEOHYDROLOGY ; SEDIMENTATION ; PRECIPITATION ; INVERSION ; SATELLITE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393466
推荐引用方式 GB/T 7714	Zaki, A. S.,Davis, J. M.,Edgett, K. S.,et al. Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara[J],2022,127(5).
APA	Zaki, A. S..,Davis, J. M..,Edgett, K. S..,Giegengack, R..,Roige, M..,...&Castelltort, S..(2022).Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,127(5).
MLA	Zaki, A. S.,et al."Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 127.5(2022).