气候变化领域集成服务门户(CCPortal): Sediment routing from shelf to basin floor in the Quaternary Golo System of Eastern Corsica, France, western Mediterranean Sea

CCPortal

DOI	10.1130/B35181.1
	Sediment routing from shelf to basin floor in the Quaternary Golo System of Eastern Corsica, France, western Mediterranean Sea
	Sweet M.L.; Gaillot G.T.; Jouet G.; Rittenour T.M.; Toucanne S.; Marsset T.; Blum M.D.
发表日期	2020
ISSN	167606
起始页码	1217
结束页码	1234
卷号	132 期号:2021-05-06
英文摘要	How and when sediment moves from shallow marine to deep-water environments is an important and poorly understood control on basin-scale sediment dispersal patterns, the evolution of continental margins, and hydrocarbon exploration in deep-water basins. The Golo River (Eastern Corsica, France), its delta, canyons, and fans provide a unique opportunity to study sediment routing from source to sink in a relatively compact depositional system. We studied this system using an array of high-frequency seismic data, multi-beam bathymetry, and five cores for lithology and age control. Movement of sediment to deep water was controlled by interactions between the Golo River, the Golo Delta, and shelf-penetrating submarine canyons. Sediment moved to deep water when lobes of the Golo Delta prograded to the heads of these canyons, or when the Golo River itself flowed directly into one of them. Sand accumulated in canyons, deep-water channels, and submarine fans during glacial periods of low sea level, while mud was deposited throughout the slope, in the relatively short reach of leveed-confined channels, and in the mud-rich fringes around the sandy fans. During interglacial periods of high sea level, the basin was blanketed by mud-rich deposits up to 10 m thick inter-bedded with distinctive carbonate-rich sediments. Deposition rates in the basin ranged from 0.07 m/ka to 0.59 m/ka over the last 450 ka. Mud deposition rates remained relatively constant at ~0.16 m/ka during all time periods, while sand deposition only happened during glacial periods of low sea level with an average rate of 0.24 m/ka. In addition to sea-level controls on sediment delivery, avulsions of the Golo River and its deltaic lobes preferentially routed sediment down either the North or South Golo canyons. Thus, while the larger, sequence-scale architecture of the basin is controlled by allogenic sea level forcing, millennial-scale autogenic processes operating on the shelf and in deep water shaped the distribution of sand and mud, and the internal geometry of the deltas and submarine fans that they fed. While some aspects of the Golo system are characteristic of steep, tectonically active margins, others such as the nature of connections between rivers and shelf-penetrating submarine canyons are observed in most margins with active submarine fans regardless of their tectonic setting.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184795
作者单位	ExxonMobil Upstream Research Company, 22777 Springwoods Village Parkway, Spring, Texas 77389, United States; ExxonMobil Upstream Business Development Company, United States; Institute Français de Recherche L'Exploitation de la Mer, GÉosciences Marines, PlouzanÉ, F-29280, France; Department of Geology, Utah State University, 4505 Old Main Hall, Logan, Utah, 84322, United States; Department of Geology, 1475 Jayhawk Blvd., University of Kansas, Kansas, 66045, United States
推荐引用方式 GB/T 7714	Sweet M.L.,Gaillot G.T.,Jouet G.,et al. Sediment routing from shelf to basin floor in the Quaternary Golo System of Eastern Corsica, France, western Mediterranean Sea[J],2020,132(2021-05-06).
APA	Sweet M.L..,Gaillot G.T..,Jouet G..,Rittenour T.M..,Toucanne S..,...&Blum M.D..(2020).Sediment routing from shelf to basin floor in the Quaternary Golo System of Eastern Corsica, France, western Mediterranean Sea.Bulletin of the Geological Society of America,132(2021-05-06).
MLA	Sweet M.L.,et al."Sediment routing from shelf to basin floor in the Quaternary Golo System of Eastern Corsica, France, western Mediterranean Sea".Bulletin of the Geological Society of America 132.2021-05-06(2020).