DOI: 10.1016/j.epsl.2017.11.054
Scopus记录号: 2-s2.0-85038901030
论文题名: A phase of transient subsidence, sediment bypass and deposition of regressive–transgressive cycles during the breakup of Iberia and Newfoundland
作者: Alves T.M. ; Abreu Cunha T.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 484 起始页码: 168
结束页码: 183
语种: 英语
英文关键词: continental breakup
; continental margins
; forced-regression
; sediment bypass
; tectonic subsidence
; transient phase
Scopus关键词: Deposition
; Seismology
; Stratigraphy
; Subsidence
; Tectonics
; Continental break-up
; Continental margin
; Continental shelves
; Continental slope
; Forced regression
; Sediment source areas
; Stratigraphic intervals
; Transient phase
; Sediments
; continental breakup
; continental margin
; continental shelf
; continental slope
; depocenter
; deposition
; lithology
; sediment
; tectonics
; transgression-regression cycle
; Canada
; Iberian Peninsula
; Newfoundland
; Newfoundland and Labrador
英文摘要: Seismic, outcrop and well data from West Iberia and Newfoundland are used to investigate sediment stacking patterns during continental breakup as a function of tectonic subsidence. In West Iberia, two breakup sequences are revealed on seismic data by marked strata offlap oceanwards from the present-day continental shelf. This character is similar to Newfoundland, where correlative strata comprise Lower Cretaceous–Cenomanian coarse-grained siliciclastics accumulated around local sediment-source areas. The interpreted data reveal that the two breakup sequences: 1) materialise sediment bypass onto continental-slope depocentres that experienced important tectonic subsidence during continental breakup, but without showing typical syn-rift growth packages; 2) generate specific forced-regressive stratigraphic intervals that relate to uplift and exhumation of the proximal margin. Subsidence and sediment stacking patterns in both West Iberia and Newfoundland reflect similar continental breakup processes as they evolved from the upper lithosphere- to their mantle-breakup stages. On both margins, coarse-grained siliciclastic units on the proximal margin give rise to thick shaley successions in deep-water basins. This work also confirms that in a setting dominated by a significant sediment influx, yet lacking the burial rates of continental slope basins in Newfoundland, West Iberia comprised accommodation-driven basins during continental breakup, not necessarily sediment starved. As a corollary of our analysis, we classify breakup sequences around the world based on the characteristic lithologies of their regressive–transgressive depositional cycles. © 2017 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110072
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: 3D Seismic Lab, School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom; Integrated Geochemical Interpretation Ltd., The Granary, Hallsannery, Bideford, Devon, EX39 5HE, United Kingdom
Recommended Citation:
Alves T.M.,Abreu Cunha T.. A phase of transient subsidence, sediment bypass and deposition of regressive–transgressive cycles during the breakup of Iberia and Newfoundland[J]. Earth and Planetary Science Letters,2018-01-01,484