bandeau-08-2016

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Sessions > CSP2 Clastic Sedimentary Processes

SYMPOSIUM CSP2 - CLASTIC SEDIMENTARY PROCESSES

Chairs. Frédéric CHRISTOPHOUL (University of Toulouse III - GET, FRA), Cédric BONNEL (University of Pau, FRA), Thierry MULDER (EPOC Bordeaux, FRA), Janrik VAN DEN BERG (University of Utrecht, NLD) mailto

Clastic sediments represent the major part of sediments preserved in the sedimentary record. They represent a great variety of sedimentary systems ranging from deep marine, such as turbidites and contourites, shallow marine, coastal, including deltaic and estuarine and continental systems such as fluvial, lacustrine, aeolian and coastal (including deltas and estuaries). In geological time scales, these systems record autocyclic processes as well as external forcing. The expression of these processes can be evidenced by the study of modern system and/or modeling and is deduced from the sedimentary record in ancient systems.

This symposium involves a huge community of sedimentologists working with a great variety of approaches (field, geophysical data interpretation, borehole data, cores and modeling. This theme is broad and we encourage contributions dealing with case studies in modern and ancient as well as analog and numerical modeling of processes in marine and non-marine aquatic systems in any relevant time scale.

  • CSP2.0 Open Session on Clastic Sedimentary Processes
  • CSP2.1 Short-term evolution and sedimentary and/or human controls of coastal depositional systems: lessons gained from ancient to Holocene examples
  • CSP2.2/SS6.5 Provenance, weathering and sorting: Disentangling the parameters controlling sediment composition
  • CSP2.3/SS6.6/SR7.10 Quantitative analysis of sediment generation, provenance, and diagenesis: keys to reconstruction of Earth-surface processes and reservoir-quality prediction
  • CSP2.4 Lacustrine depositional systems
  • CSP2.5 Sediment density flows in siliciclastic, pyroclastic and calciclastic settings: process and product
  • CSP2.6/SS6.7 Eolian systems and their preserved successions: processes, preservation in time and space, response to climatic and tectonic controls, and implications for source-to-sink sediment distribution
  • CSP2.7 Coastal sediment dynamics from past to present
  • CSP2.8 PaleoHazards
  • CSP2.9/SB5.7 Sequence Stratigraphy in Glaciogenic Depositional Systems
  • SS6.1/CB1.10/CSP2.10 Multiscale approach: a key for better assessment of sedimentary driving forces?
  • SS6.3/CSP2.11/SB5.9 Sediment transport and deposition, from the river system to the lab

 

  • CSP2.0 Open Session on Clastic Sedimentary Processes

Conveners. Frédéric CHRISTOPHOUL (University of Toulouse III - GET, FRA), Cédric BONNEL (University of Pau, FRA), Thierry MULDER (EPOC Bordeaux, FRA), Janrik VAN DEN BERG (University of Utrecht, NLD) mailto

Description. This open session invites contributions on the general topics related to Clastic Sedimentary Processes. It is an opportunity to present studies that do not fall within research covered by the special sessions CSP2.1 to CSP2.12.

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  • CSP2.1 Short-term Evolution and sedimentary and/or human Controls of coastal depositional Systems: Lessons gained from ancient to Holocene Examples

Conveners. Daniela RUBERTI (Campania University "L. Vanvitelli", ITA), Mikkel FRUERGAARD (Geological Survey of Denmark and Greenland, DNK), Ernesto SCHWARZ (University of La Plata & CONICET, ARG), Clément POIRIER (University of Caen, FRA) mailto

Description. Coastal areas of the world are often densely populated and human activities have extensively modified coastal landscapes and ecosystems, leaving traces also in the sedimentary record. Coastal depositional environments are important in the geological record where oil, gas and water exist in large quantities in reservoir sands of ancient depositional environments. Successful and sustainable management and exploration of both modern and ancient coastal environments relies on a comprehensive knowledge of the sedimentary and human factors controlling coastal evolution.

This session aims to explore the causes and consequences of factors and processes operating on short-term scales on the evolution of coastal depositional systems (hours-days to 10s kyr), ranging from changes in hydrodynamics, sedimentology, or ecology of the system, to sea-level, climate, and/or tectonic modifications. For the Holocene sedimentary evolution of coastal settings, this session also seeks to present contributions distinguishing between natural and anthropogenic controlling factors. We encourage studies addressing a wide range of spatial and temporal scales, applying state of the art methodologies and covering all types of coastal environments. Interdisciplinary studies are strongly encouraged as they provide the basis for a sustainable management.

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  • CSP2.2/SS6.5 Provenance, Weathering and Sorting: Disentangling the Parameters controlling sediment Composition

Conveners. Sebastien BERTRAND (Ghent University, BEL), Inka MEYER (Ghent University, BEL), Janna JUST (University of Cologne, DEU), Gert Jan WELTJE (University of Leuven, BEL) mailto

Description. Sediment composition is controlled by several independent variables that are intrinsically difficult to disentangle. Those parameters include the nature of the sediment sources, climate, and the pathways by which sediment is transferred from the source to the site of deposition. Unravelling the signature of each of these parameters is critical to understand modern sediment dynamics as well as to generate accurate paleo-reconstructions from sediment records. It is also a prerequisite for the quantitative analysis of Earth-surface processes. Thanks to development of sophisticated analytical techniques in the last decades, Earth scientists have now access to a wide range of tools to quantify sediment properties and ultimately isolate the signature of individual processes.

With this in mind, this session aims to gather scientists from the broad field of sediment composition analysis, and more particularly those focusing on understanding the sedimentary signature of provenance and transport processes. We welcome studies that explore new analytical tools, and we encourage presentations combining laboratory measurements with numerical techniques. We welcome contributions that present reconstructions of provenance, weathering and sorting in both modern sediments and ancient sedimentary records.

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  • CSP2.3/SS6.6/SR7.10 Quantitative Analysis of sediment Generation, Provenance, and Diagenesis: Keys to Reconstruction of Earth-Surface Processes and Reservoir-Quality Prediction

Conveners. Luca CARACCIOLO (FAU University Nürnberg-Erlangen, DEU), Gert Jan WELTJE (University of Leuven, BEL), Eduardo GARZANTI (University of Milan-Bicocca, ITA), Bill HEINS (ExxonMobil Houston, USA) mailto

Description. The ability to trace sediments from their sources to sedimentary basins is a prerequisite for quantitative analysis of Earth-surface dynamics. The comparatively recent revival of sedimentary provenance analysis has greatly benefitted from the continuously expanding range of tools to quantify sediment properties (isotopic, mineral, chemical, and petrographic composition, grain-size, -shape, and -density distributions, age spectra, etc.) and interpret such data in palaeo-geographic, -tectonic and -climatic terms. The breakdown of sediment budgets into source-specific contributions, which is one of the most important tasks of quantitative provenance analysis (QPA), permits quantification of rates of surface processes in the geological past ("deep time"), even in cases where source areas have been destroyed by global tectonics. QPA is therefore crucial to the reconstruction of ancient sediment-routing systems, the fundamental units of mass transfer at the Earth's surface. In terms of applications, QPA fulfils a key role in the prediction of sediment properties at the time of deposition, and their diagenetic pathways which determine reservoir quality.

Early diagenetic modifications (grain rearrangement and early cementation) are controlled by the combination of sediment characteristics (mineral/grain composition as a function of size) and the nature of the depositional environment, which can only be understood by integration of sedimentary petrology with sedimentology. Sediment characteristics and depositional facies also control further diagenetic modifications during deep burial, which may give rise to wholesale dissolution of primary and secondary phases, and precipitation of late cements. All of these factors together determine the final properties of ancient sediments, and may limit the extent to which reconstruction of initial sediment properties is feasible.

One of the long-standing obstacles to modelling of the spatial distribution of sediment properties is the selective nature of grain entrainment, transport, and deposition, which gives rise to joint compositional-textural variations that are not of primary concern to those who wish to reconstruct provenance, but are key to predicting spatial variation of reservoir quality. Finding ways to navigate these complexities is one of the most challenging tasks of sediment-generation studies, and the subject of ongoing research on modern sediments in particular, which do not suffer from diagenetic overprinting.

In this session we welcome all contributions dealing with the above themes. We aim to provide a broad overview of pertinent problems in the field, and hopefully, of solutions to some of them. We invite you all to contribute to this session, which is aimed at charting the state of the art and pointing the way forward in the field of sediment-property analysis for geological reconstructions and reservoir-quality prediction.

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  • CSP2.4 Lacustrine depositional Systems

Conveners. Steven ANDREWS (CASP, GBR), Mathieu SCHUSTER (IPG Strasbourg, FRA), Marc De BATIST (Ghent University, BEL), Alexis Nutz (Århus University, DNK) mailto

Description. Lacustrine basins provide an ideal natural laboratory for the study of depositional systems and their response to environmental change. Unlike their larger marine counterparts greater control on the inputs and outputs to the basin can be achieved. Lacustrine basins therefore provide a unique opportunity to investigate long term climatic change and recurrence intervals of geological events both of which have significant human impact. Furthermore, lacustrine basins have significant resource potential around the world and therefore understanding facies distributions within these settings is important.

This session aims to be inclusive of all aspects of lacustrine sedimentology from lake shore zone dynamics to high resolution deep water records of geological events, all of which build towards increasing our knowledge of lacustrine depositional systems and updating our lacustrine facies models.

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  • CSP2.5 Sediment Density Flows in siliciclastic, pyroclastic and calciclastic Settings: Process and Product

Conveners. Matthieu CARTIGNY (Durham University, GBR), Guilhem DOUILLET (Ludwig-Maximilians-Universität, Munchen, DEU), Joris EGGENHUISEN (Utrecht University, NLD), Thierry MULDER (University of Bordeaux, FRA) mailto

Description. Sediment density flows are sediment-laden geophysical currents that flow down-slope due to gravity acting on the sediment they carry. This session aims to compare and contrast the processes and deposits of density flows in different settings. We welcome contribution on flow types that include landslides, debris flows, grain flows, turbidity currents, pyroclastic flows and snow avalanches.

This session aims to investigate the similarities and differences between all these types of flows and their sedimentary deposits over a wide range of settings and sediment types. We invite contributions from modern and ancient environments as well as experimental and numerical simulations examining the generation, transport, flow and sedimentation processes within sediment density flows. This session has the intention to bring together field and modelling contributions, to explore the fascinating dynamics of these flows, and the link to their deposits.

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  • CSP2.6/SS6.7 Eolian Systems and their preserved Successions: Processes, Preservation in Time and Space, Response to climatic and tectonic Controls, and Implications for Source-to-Sink Sediment Distribution

Conveners. Sylvie BOURQUIN (University of Rennes 1, FRA), Nigel MOUNTNEY (University of Leeds, GBR), Clément NARTEAU (IPG Paris, FRA) mailto

Description. Eolian systems and their preserved deposits are widespread both across the present-day earth surface and throughout much of the ancient geologic record. However, aeolian systems are not currently adequately accounted for in source-to-sink models, despite their important role as sediment stores. Eolian system accumulation and preservation arises in response to specific combinations of climatic and tectonic conditions.

This session aims to provide a broad overview of aeolian processes and deposits, their various mechanisms of preservation throughout time and space, and their stratigraphic record in different geodynamic contexts, from the ancient geologic past to today. We seek to bring together both geologists and geomorphologists working on the dynamics of aeolian sedimentary systems.

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  • CSP2.7 Coastal Sediment Dynamics from Past to Present

Conveners. Jasper KNIGHT (University of the Witwatersrand, Johannesburg, ZAF), Edward ANTHONY (University of Aix-Marseille, FRA), Massimo MORETTI (Bari University, ITA) mailto

Description. This session is focused on the physical aspects related with the erosive-erosional-sedimentary processes in various coastal environments. We suppose to cover a wide range of transitional to shallow-sea environments (i.e. beaches, barrier island systems, cliffs and coastal bluffs, deltas, sheltered bays, semi enclosed basins, coastal lagoons and marshes) analyzing the role of storm-waves, tides and currents in the short and long-term morpho-sedimentary evolution of coastal areas.

This session will host studies on ancient shallow-sea successions, present-day examples and numerical-analogical approaches. We encourage also interdisciplinary contributions that analyze the interactions between physical and biological processes in the sediment dynamics including the human impact on the coastal evolution.

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  • CSP2.8 PaleoHazards

Conveners. Geoffroy LAMARCHE, (NIWA, NZL), Emmanuel CHAPRON (University of Toulouse II - GEODE, FRA), Jean-Luc SCHNEIDER (EPOC Bordeaux, FRA), Flavio ANSELMETTI (University of Bern, CHE) mailto

Description. Marine and lacustrine basins are widespread around the globe and are being exposed to the full spectra of natural hazards. They represent key sedimentary environments, reinforced by the very good preservation of sedimentary records in the subaquatic realm. Of particular interest is the preservation of sedimentary events triggered by abrupt geological events over long time scales. Understanding and quantifying the sensitivity and exposure of such modern subaquatic basins to recent natural hazards is essential to pinpoint dominating sedimentary processes and to calibrate the sedimentary records of natural hazards over geological time scales. Modern marine and lacustrine basins can also help establish the regional impact of contrasted natural hazards since they can today be precisely mapped, sampled and dated.

This session aims to show case, discuss and improve our understanding of marine and lacustrine sedimentary records of earthquakes, tsunamis, volcanic eruptions, limnic eruptions, hurricanes, outburst floods and flash floods. We are particularly interested in multidisciplinary studies from data acquisition and novel methodologies for the study of sedimentary record providing encompassing view of the impact of natural hazards, their recurrence and associated driving forces.

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  • CSP2.9/SB5.7 Sequence Stratigraphy in Glaciogenic Depositional Systems

Conveners. Jean-François GHIENNE (EOST Strasbourg, FRA), Daniel Le HERON (Royal Holloway University, London, GBR), Pierre DIETRICH (University of Johannesburg, ZAF) mailto

Description. The sedimentary record is our main archive when investigating deep-time glaciation. Sequence stratigraphic models of glaciogenic successions differ considerably from non-glacial depositional systems owing to, for instances, significantly higher rates of sediment supply, complex patterns of relative sea-level change with competing glacioeustacy and glacioisostacy, recurrent high-magnitude outburst events, high-amplitude glacial erosion surfaces and related subglacial depositional systems.

This session intends to bring together geoscientists from paleoclimatology to reservoir engineering, showing how a better understanding of Earth's glacial record may be achieved by developing specific concepts for the unravelling of glaciogenic depositional sequences in sedimentary basins.

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  • SS6.1/CB1.10/CSP2.10 Multiscale approach: a key for better Assessment of sedimentary driving Forces?

Conveners. Claude COLOMBIÉ (University of Lyon 1, FRA), Bernadette TESSIER (CNRS, University of Caen Normandie, FRA), Joep STORMS (Delft University of Technology, NLD), Anaëlle SIMONNEAU (ISTO, University of Orléans, FRA) mailto

Description. Sedimentation depends on environmental (i.e., physical, chemical or biological), tectonic or climatic (i.e., cyclic or episodic) controls that act at different spatiotemporal scales. While extensive studies (i.e., a region on a few tens to thousands to millions of years) allow the assessment of global or regional controlling factors, restrictive studies (i.e., a site on a few centuries to a few years) focus on defining regional or local factors.

Therefore, multiscale approach seems to be the best way to define the broadest range of controlling factors of sedimentary, oceanic, atmospheric or ecosystems.

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  • SS6.3/CSP2.11/SB5.9 Alluvial to fluvial Dynamics: a Key-Element in Source-to-Sink Quantification

Conveners. Sébastien ROHAIS (IFP Energies Nouvelles, FRA), Laure GUÉRIT (University of Toulouse III - GET, FRA), Poppe de BOER (Utrecht University, NLD) mailto

Description. Understanding how sediments are eroded, transported and deposited by rivers and in the sea is fundamental for identifying the relationship between drainage dynamics (sources) and the filling history of sedimentary basins (sinks), at all scales. Stratigraphic architecture of alluvial to fluvial systems is the very first sedimentary record at the outlet of the drainage area, and provides the record of relief history and sediment by-pass. Laboratory experiments provide an additional wealth of information and help to investigate the processes involved in landscape evolution, as well as the record of sedimentary sequences.

The session is focused on field studies and laboratory experiments that contribute to our knowledge on sediment production, fluvial dynamics, and stratigraphic architectures. We particularly welcome works on:

  1. sedimentation processes in alluvial fans and deltas;
  2. sediment production in (high) relief / drainage areas, in relation to lithology, climate and tectonics;
  3. fluvial processes and sediment by-pass;
  4. the relation between fluvial systems and their associated sedimentary basins (final sink).

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