T03 Carbonate sedimentology

T03-SS01 - Geochemistry of modern and Recent carbonates

Conveners: Pederson Ch. (Ruhr-University, Germany), Sanchez-Romain M. (Vrije Universiteit, Netherlands), Swart P. (Rosenstiel School of Marine and Atmospheric Sciences, USA), Della Porta G. (University of Milan, Italy)

In this session, we invite contributions related to the deposition and early diagenesis of modern and Recent carbonates. Depositional systems ranging from continental to deep marine are welcome, but with a focus on the shallow marine system. Research topics include the geochemical characterization of carbonates in modern systems to better understand the range and meaning of depositional signals, new geochemical proxies, and mechanisms of carbonate precipitation. Furthermore, proxy preservation during formation and the earliest stages of diagenesis is of interest. This session provides an opportunity to present studies within a diverse context of methodologies and approaches, all guided toward a better understanding of the formation and early alteration of carbonate deposits. Geomicrobiological approaches developing calibration of specific and/or new geochemical proxies, such as stable isotopic fractionation and element partitioning for carbonates are very much encouraged. We hope to gather a range of multidisciplinary contributions linking fieldwork, laboratory experimentation with the application of cutting-edge analytical and spectroscopic techniques.

T03-SS02 - Resedimented carbonates - generation, transportation, deposition

Conveners: Rieux A. (Normandie Université, France), Slootman A. (King Fahd University of Petroleum and Minerals, Saudi Arabia), Schnyder J. (ExxonMobil, USA), Playton T. (Tengizchevroil, Kazakhstan), Lokier S. (Bangor University, UK)

Carbonate environments yield a diverse range of depositional products. Biogenically-produced and -induced carbonate build-ups have received most of the attention, while resedimented carbonates have been the ‘ugly duckling’ of carbonate sedimentology. Carbonate sediments in marine, lacustrine and terrestrial systems are subject to a multitude of transport and depositional processes. Resedimented carbonates also contribute to large hydrocarbon reservoirs. Carbonate particles comprise a wide range of sizes and shapes governed less by sediment maturity and more by the skeletal nature of the carbonate-producing organisms. The divergence of shape and density between carbonate and siliciclastic particles lead to marked differences in hydraulic behaviour. However, there are many examples of resedimented carbonate and siliciclastic grains occurring together. This session aims to explore depositional models for pure and mixed resedimented carbonates, from modern to ancient and from the scale of single grains to shelf-to-basin profiles, and welcomes researchers from all disciplines, in particular early career scientists.
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