Holocene sedimentary systems on continental shelves

Gao, Shu; Collins, Michael B.

doi:10.1016/j.margeo.2014.03.021

Cited by 185 publications

(102 citation statements)

References 296 publications

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“…Short-term processes such as wave-current induced sediment transport, associated with inter-annual variations in sediment supply, shape the seabed morphology and control sediment dispersion. On the other hand, long-term processes like relative sea-level changes, associated with time-integrated sediment supply, control the sedimentary system, defined by Gao and Collins (2014) as a set of deposits formed in one geomorphological environment, including coastline transgression/regression and facies distribution.…”

Section: Introductionmentioning

confidence: 99%

Modern sedimentary processes along the Doce river adjacent continental shelf

et al. 2015

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ABSTRACT:In areas of the continental shelf where sediment supply is greater than the sediment dispersion capacity, an extensive terrigenous deposits and consequently submerged deltas can be formed. The Eastern Brazilian shelf is characterized by the occurrence of river-feed deltas in between starving coasts. Herein, modern sedimentary processes acting along the Doce river adjacent continental shelf are investigated. The main objective was to understand the shelf sediment distribution, recognizing distinct sedimentary patterns and the major influence of river sediment discharge in the formation of shelf deposits. The study used 98 surficial samples that were analyzed for grain size, composition and bulk density. Results revealed 3 distinct sectors: south -dominated by mud fraction with a recent deposition from riverine input until 30 m deep and from this depth bioclastic sands dominate; central--north -sand-mud dominated, been recognized as a bypass zone of resuspended sediment during high energy events; and north -relict sands with high carbonate content. The modern sedimentation processes along the Doce river continental shelf is dominated by distinct sedimentary regimes, showing a strong fluvial influence associated with wave/wind-induced sediment dispersion and a carbonate regime along the outer shelf. These regimes seem to be controlled by the distance from the river mouth and bathymetric gradients. KEYWORDS:

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Section: Introductionmentioning

confidence: 99%

Modern sedimentary processes along the Doce river adjacent continental shelf

et al. 2015

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“…Highly asymmetric prodeltas are major contributors to clastic sediment masses on continental shelves (Liu et al, 2009;Bhattacharya, 2010;Gao and Collins, 2014).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Asymmetry in Holocene river deltas: Patterns, controls, and stratigraphic effects

Korus

Fielding

2015

Earth-Science Reviews

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“…Shelves also preserve detailed and commonly unique archives of environmental changes in the complex interaction among climate, sea level and sediment input from landmasses, recorded in the depositional and erosional features of the subsurface (Gao & Collins 2014;Lobo & Ridente 2014). In detail, changes in rainfall and hydrology, and possibly storm energy and frequency, may leave their signature in shelf stratigraphy and morphology.…”

Section: Why Study Continental Shelves?mentioning

confidence: 99%