globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.01.006
论文题名:
Development of submarine canyons after the Mid-Pleistocene Transition on the Ebro margin, NW Mediterranean: The role of fluvial connections
作者: Mauffrey M.-A.; Urgeles R.; Berné S.; Canning J.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 158
起始页码: 77
结束页码: 93
语种: 英语
英文关键词: 3D seismic attributes ; Early deglacials ; Ebro margin ; Fluvial connection ; Glacial maxima ; MIS 22, 16 and 12 ; Plio-Quaternary ; Submarine canyon development ; Submarine canyon initiation
Scopus关键词: Erosion ; Glacial geology ; Sea level ; Seismic response ; Seismic waves ; Seismology ; Stratigraphy ; Submarines ; 3D seismic ; Early deglacials ; Ebro margin ; Fluvial connection ; Glacial maxima ; Plio-Quaternary ; Submarine canyon ; Computer integrated manufacturing ; chronostratigraphy ; deglaciation ; fluvial process ; geoaccumulation ; Last Glacial Maximum ; marine isotope stage ; ocean-continent transition ; paleoceanography ; Pleistocene ; sea level change ; seismic attenuation ; seismic data ; submarine canyon ; Ebro Basin ; Greece ; Mediterranean Region ; Messenia ; Peloponnisos ; Spain ; Zanclea
英文摘要: After the Messinian Salinity Crisis (MSC), the Ebro Margin, like other Mediterranean deltaic margins, rebuilt through progradation and increasingly significant aggradation. The Plio-Quaternary transition from a ramp-like system to a “new” margin with large clinoforms is an opportunity to understand the processes that govern canyon initiation and evolution. We used a 3D seismic data set located at the outer shelf - upper slope of the Ebro margin. We tied major bounding surfaces to chrono-stratigraphic constraints from borehole data or, for the most recent interval, from averaged accumulation rates derived from borehole stratigraphy. The major shelfal erosion surfaces are interpreted as sequence boundaries, tied to major glacial maxima. Along these surfaces, seismic attributes characterize the fluvial/canyon connection, viewed as one of the key factors in canyon development. The first appearance of “proto-canyons” (dense networks of channels and gullies 50–100 m deep and 1–2 km wide) occurs in the late Zanclean. Their size increased progressively throughout the Pliocene and early Quaternary, in relation to the increase in clinoform heights. “True canyons” (with distinct interfluves, more than 200 m deep and 3–4 km wide) appeared during the Mid-Pleistocene Transition (MPT, 1250–700 ka BP). The first evidence of direct connection between canyon heads and fluvial systems is observed during Marine Isotope Stage 22, one of the most pronounced glacial stages of the Quaternary. Similar connections also existed, at least, during MIS 16 and MIS 12, which are also stages of pronounced low sea level. The topography of fluvial channels in the outer shelf is not imaged in detail in the picked horizons at the resolution of our seismic data, but sinuous fluvial systems are very well imaged through amplitude and coherency attributes. Direct connection of fluvial systems during and after MIS 22 also favored headward erosion and the formation of shelf-indenting canyons, probably during early phases of sea-level rise. © 2017 Elsevier Ltd
资助项目: Mauffrey, M.-A. ; CEFREM, Université de Perpignan, 52, Avenue Paul Alduy, France
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59313
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: CEFREM, Université de Perpignan, Perpignan, France; Institut de Ciències del Mar (CSIC), Barcelona, Catalonia, Spain; British Gas Exploration and Production Limited Reading, United Kingdom

Recommended Citation:
Mauffrey M.-A.,Urgeles R.,Berné S.,et al. Development of submarine canyons after the Mid-Pleistocene Transition on the Ebro margin, NW Mediterranean: The role of fluvial connections[J]. Quaternary Science Reviews,2017-01-01,158
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Mauffrey M.-A.]'s Articles
[Urgeles R.]'s Articles
[Berné S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Mauffrey M.-A.]'s Articles
[Urgeles R.]'s Articles
[Berné S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Mauffrey M.-A.]‘s Articles
[Urgeles R.]‘s Articles
[Berné S.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.