Element migration in turbidite systems: Random or systematic depositional processes?

Labourdette, Richard; Bez, M.

doi:10.1306/09010909035

Cited by 48 publications

(35 citation statements)

References 43 publications

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“…(1) within individual submarine channel systems, channel size variability is relatively small, (2) channels migrate in a systematic way and their placement is far from random (Labourdette, 2008;Labourdette and Bez, 2010). Starting from such observations, we have developed a three-dimensional geometric model for submarine channel-levee systems.…”

Section: Introductionmentioning

confidence: 99%

A model of submarine channel-levee evolution based on channel trajectories: Implications for stratigraphic architecture

Sylvester

Pirmez

Cantelli

2011

Marine and Petroleum Geology

186

137

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Section: Introductionmentioning

confidence: 99%

A model of submarine channel-levee evolution based on channel trajectories: Implications for stratigraphic architecture

Sylvester

Pirmez

Cantelli

2011

Marine and Petroleum Geology

186

137

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“…Several authors relate the vertical aggradation O V to be mainly influenced by external factors such as the confinement degree, the sedimentary charge, the accommodation space and, to a lesser point, by morphological parameters such as the sinuosity of the channel (Labourdette and Bez, 2010;Peakall et al, 2000;Wynn et al, 2007). Thus, O V could be constrained by layer thickness trend or distality if available.…”

Section: Stochastic Reverse Migrationmentioning

confidence: 99%

“…This migration goes along with a perpetual reworking of sediments due to erosion, transport and deposition. Labourdette and Bez (2010) and Peakall et al (2000) describe a vertical migration (aggradation, Fig. 1a) and two horizontal migrations, one directed downstream, in the direction of flow, and one directed perpendicularly to the flow direction (Fig.1b).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of Channelized Systems Through a Conditioned Reverse Migration Method

Parquer¹,

Collon²,

Caumon³

2017

Math Geosci

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Geological heterogeneities directly control underground flow. In channelized sedimentary environments, their determination is often underconstrained: it may be possible to observe the most recent channel path and the abandoned meanders on seismic or satellite images, but smaller-scale structures are generally below image resolution. In this paper, reconstruction of channelized systems is proposed with a stochastic inverse simulation reproducing the reverse migration of the system. Maps of the recent trajectories of the Mississippi river were studied to define appropriate relationships between simulation parameters. Measurements of curvature and migration vectors showed (i) no significant correlation between curvature and migration offset and (ii) correlation trends of downstream and lateral migration offsets versus the curvature at half-meander scale. The proposed reverse migration method uses these trends to build possible paleo-trajectories of the river starting from the last stage of the sequence observed on present-day (satellite or seismic) data. As abandoned meanders provide clues about the paleo-locations of the river, they are integrated step by step during the reverse simulation process. We applied the method on satellite images of a fluvial system. Each of the different resulting geometries of the system honors most of the available observations and presents meandering patterns that are similar to the observed ones.

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“…Seismic attribute maps extracted from 3D seismic datasets have been used increasingly to identify the geometries of depositional units within submarine channel complexes (e.g. Kolla et al 2007;Labourdette & Bez 2010). However, there are still significant resolution issues between seismic datasets and what geologists are able to observe, interpret and quantitatively extract from outcrop analogue studies.…”

Section: Introductionmentioning

confidence: 99%

Capturing stratigraphic and sedimentological complexity from submarine channel complex outcrops to digital 3D models, Karoo Basin, South Africa

Pringle

Brunt

Hodgson

et al. 2010

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Submarine slope channel-fills form complicated stratigraphy and lithofacies distributions through repeated phases of erosion and deposition. This provides a challenge to accurate 3D modelling, particularly in representing lithofacies transitions within sand-poor areas. In this paper, traditional (sedimentary logs, palaeocurrent measurements, architectural panels) and non-conventional technologies (Light Detection and Ranging; Ground Penetrating Radar) were integrated to quantitatively describe lithofacies distributions and sedimentary architectures from two large-scale outcrops, one base of slope, high sandstone content system (Unit B) and one from a mid-slope, more mixed lithology system (Unit C), in the Laingsburg Formation, Karoo Basin, South Africa.The workflow described in this study combines digital structural restoration and extrapolation of major stratigraphic surfaces, grouped palaeocurrents and architectural geometries observed at outcrop to create 3D digital models. The model was divided into zones along major stratigraphic discontinuities and populated using lithofacies associations that were adjusted for outcrop rugosity and palaeodispersal direction. Observed channel margin asymmetries, distribution of lithofacies and stacking patterns were all honoured in the digital models.The Unit C slope-channel system differs from many exposed submarine channels due to the low proportion of sandstone present within the infill. Thin-bedded channel margin lithofacies are preserved through the lateral stepping of channels and allow the correlation of stratigraphy from channel axis to margin and on to overbank areas. In the older, sandier Unit B base-of-slope system, the stratigraphic change in stacking pattern, channel aspect ratio, lithofacies of channel-fills and stratigraphic hierarchy were all captured. This research captured the architectural complexity observed at outcrop to generate more realistic models than could be constructed normally using limited subsurface data.

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Element migration in turbidite systems: Random or systematic depositional processes?

Cited by 48 publications

References 43 publications

A model of submarine channel-levee evolution based on channel trajectories: Implications for stratigraphic architecture

A model of submarine channel-levee evolution based on channel trajectories: Implications for stratigraphic architecture

Reconstruction of Channelized Systems Through a Conditioned Reverse Migration Method

Capturing stratigraphic and sedimentological complexity from submarine channel complex outcrops to digital 3D models, Karoo Basin, South Africa

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