Sessions > SS6 Sources & Sinks
SYMPOSIUM SS6 - Sources and Sinks
Chairs. Stéphane BONNET (University of Toulouse III - GET, FRA), François BAUDIN (University of Paris VI, FRA), Sébastien CASTELLTORT (University of Geneva, CHE), Daniel GARCIA-CASTELLANOS (ICTJA - CSIC in Barcelona, ESP)
The quantification of sediment budget from sedimentary basin analysis offers the unique opportunity to constrain the dynamics of mass transfers at the Earth surface, including the denudation and production of sediments in erosional landscapes where very few direct archives exist, their transfer and storage throughout the fluvial system, and their eventual partitioning within the different segments of the depositional profile. Such analyses are also fundamental to quantify budgets of solute and particulate loads of importance for the chemical composition of sediment as well as organic carbon distribution and burial. Further, source-to-sink perspectives are now widely used in exploration of resources. This holistic approach requires an advanced understanding of all the components of the sediment routing system, and particularly of the modulation of the sediment flux signal as it propagates through the routing system and of its expression in sedimentary basins in term of facies and architectures. This approach must examine siliciclastic, carbonate and organic matter separately and all together to achieve a complete budget of the sedimentary system.
We solicit studies that will address all the facets of source-to-sink analysis, from the study of processes, multidisciplinary integrated approaches of natural case studies, to numerical and physical modelling. Studies dedicated to methodology and/or to innovative techniques for quantifying sediment budgets and transfers are also welcome.
Conveners. Stéphane BONNET (University of Toulouse III - GET, FRA), François BAUDIN (University of Paris VI, FRA), Sébastien CASTELLTORT (University of Geneva, CHE), Daniel GARCIA-CASTELLANOS (ICTJA - CSIC in Barcelona, ESP)
Description. This open session invites contributions on the general topics related to Sources and Sinks. It is an opportunity to present studies that do not fall within research covered by the special sessions SS6.1 to SS6.12.
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)
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.
Description. This session addresses the numerical modeling of sedimentary systems at different temporal and spatial scales in order to predict facies and property distributions in a sequence stratigraphic framework. It aims to bring together a wide range of studies focusing on clastic, carbonate and evaporite depositional environments. Contributions addressing numerical modeling of major processes affecting the production, transport and deposition of sediments at a source to sink scale are especially encouraged (from weathering and early diagenesis to fluvial, coastal and deep-water sediment transport).
We aim to balance academic approaches to industrial applications to provide an updated view of the contribution of stratigraphic forward models to our understanding of sedimentary systems and assessment of natural resources.
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:
Description. Over the Earth’s history, oceanic carbonate production has shown large changes in terms of global accumulation rate but also in terms of spatial distribution. The evolution of chemical conditions in the ocean, modifications of the accommodation space and evolutionary processes induced changes in biological activity are the most common forcing factors incriminated to explain those changes.
This session will discuss carbonate production in neritic realm (e.g. Callovian-Oxfordian carbonate production crisis) and in pelagic realm (e.g. the emergence of the pelagic carbonate production) and will tends to highlight physical mechanisms (e.g. temperature, sea-level), chemical mechanisms (e.g. ocean saturation state, migration of the CCD) and biological mechanisms (e.g. evolution of new producers) forcing the global carbonate production variations. We are particularly interesting in gathering together fields and modeling specialists to emulate discussions over this scientific question.
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.
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)
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 paleo-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.
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.
Description. Our session aims to bring together sedimentologists, geomorphologists, and structural geologists with broad interests in surface processes in sediment routing systems of convergent zones:
Description. The mechanism of continental break-up, from the formation of rifts to passive continental margins (divergent to transform), and their consequences on the geometry of the sediment infilling, are still poorly understood. Several european programs (in France Actions Marges and PAMELA programs) addressed these questions which provide new observations, models and concepts. In this session we want to address several key points:
We encourage contributions aiming to present observations, quantifications and/or modeling addressing these questions, with special attention to the coupling processes.
Description. Tectonic and sedimentary processes are intimately linked throughout basin development on all scales of time and space. This session focuses on interactions of sedimentation and tectonics on the scale of individual structures such as folds, faults and diapirs of salt and shale in all basinal settings.
Growth or syntectonic strata are deposited during deformation. Syn-depositional tectonic activity intimately controls sedimentation patterns. Many studies have provided important insight into the impact of growth structures on facies and thickness distributions. Sedimentation, in turn, influences deformation, for example, enhancing or damping deformation distribution by mass flux or by controlling deformation style through mechanical stratigraphy. Over the last 20 years the study of growth strata has also provided first order constraints on quantifying deformation distribution, timing, rates, kinematics and mechanisms.
For this session we invite contributions presenting new studies on these topics based on field or sub-surface data, numerical or analog modeling.
Description. This session is dedicated to multidisciplinary studies of Precambrian to Cenozoic South American basins. It aims to present new findings and developments related to these basins. Are expected:
The scope is broad so we seek synthetic multidisciplinary studies contributions regarding one or more of these aspects although representative case study contributions are also welcome.
Conveners. Rodrigo RIQUELME (Universidad Católica del Norte, CHL), Sébastien CARRETIER (IRD GET, FRA), Alberto FERNÁNDEZ-MORT (Universidad Católica del Norte, CHL & Universidad Complutense de Madrid, ESP)
Description. The deposition of continental sedimentary successions is occasionally accompanied by different types of ore mineralization. These mineralization processes vary, for instance, from mechanical concentration of heavy minerals (e.g. gold, diamonds) to ore minerals precipitation from ore-bearing solutions (e.g. copper, iron). All of these ore deposits occur within sedimentary deposits of various ages (from Precambrian to Present day) and can be formed within variable depositional settings (from alluvial fan to coastal environments) and under different climatic conditions (from hyperarid to humid).
This session aims to expose diverse study cases which reveal the importance of the environmental and climatic conditions during the formation of these continental sediment-hosted ore deposits. This session is proposed by the French Chilean research project LMI-COPEDIM (COpper and PEDIMents), that tries to link the formation of supergene and exotic-Cu ore deposits in Northern Chile with the sedimentary, geomorphologic and paleoclimatic evolution of the Atacama Desert. This session also attempts to show how these kinds of researches can be very valuable as an exploration tool for mining industry.
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