FROG

Réservez la date dès maintenant !

À l’occasion du colloque international Q11, le BRGM et l’ISTO, avec l’AFEQ CNF-INQUA sont heureux d’accueillir à Orléans les 13, 14, 15 février 2018 la communauté scientifique travaillant sur les environnements, les climats et leurs impacts sur les populations humaines au Quaternaire.

Organisation :
• Service géologique national – BRGM
3 avenue Claude-Guillemin, 45060 Orléans
• Institut des Sciences de la Terre d’Orléans – ISTO – 1A rue de la Ferollerie, 45071 Orléans

Nous  joindre :  Q11[a]brgm.fr

La prochaine circulaire présentant les thèmes et les sessions sera diffusée au printemps 2017.

Téléchargez la première circulaire

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Chers collègues,

Nous voudrions attirer votre attention sur la session 11n ‘Development, improvements and limitations of organic (paleo)environmental proxies’ que nous souhaitons organiser lors de la prochaine Goldschmidt conference qui aura lieu à Paris du 13 au 18 août 2017.

L’orateur principal de la session (key note) sera le Prof. Dr. Jaap Sinninghe Damsté (Royal NIOZ, Pays-Bas).

La soumission des résumés est ouverte jusqu’au 1er avril à : https://goldschmidt.info/2017/abstracts.

N’hésitez pas à faire circuler cette annonce auprès vos étudiants, post-doctorants ou collègues qui pourraient être intéressés.

Avec toutes nos excuses pour d’éventuelles réceptions multiples, et au plaisir de vous voir à Paris,

Sincères salutations,

Vincent Grossi et Guillemette Ménot.

Chers collègues,

Arnaud Huguet, Chuanlun Zhang, Antonio García-Alix, Nikolai Pedentchouk, Sabine Lengger et moi-même (Julien Plancq) animerons une session lors de la prochaine Goldschmidt du 13 au 18 août 2017 à Paris.

Vous pouvez dès à présent soumettre vos abstracts en suivant ce lien https://goldschmidt.info/2017/abstracts et ce jusqu’au 1er avril prochain!

17J: ORGANIC PROXIES IN TERRESTRIAL AND AQUATIC ECOSYSTEMS: A BIOGEOCHEMICAL PERSPECTIVE. IN MEMORIAM GEOFF EGLINGTON

Keynote: Simon Belt (University of Plymouth)

Proxies based on organic biomarkers, such as glycerol dialkyl glycerol tetraethers, long-chain diols and alkenones, and compound specific isotope analyses are increasingly used for terrestrial paleoenvironmental and paleoclimate reconstructions. Nevertheless, the application of these tools is not straightforward, as it can be complicated by various factors (environmental, physical, ecological, etc.). Furthermore, some biomarker-based proxies that have been used in marine environments for decades still need further development to be applied in the terrestrial realm. The aim of this session is to investigate the biogeochemical mechanisms behind the organic proxies in aquatic, lacustrine and terrestrial ecosystems and their reliability as environmental or climatic tracers. In particular, we are inviting contributions using molecular and stable isotope compositions of biomarkers, and radiocarbon dating, to study organic matter sources and climatic variables in order to better understand the past climates and particularly the polar regions, which are among the most sensitive areas to climate change. Integrated and multidisciplinary studies on organic biomarkers, their calibration, modelling and application as paleoproxies are welcome. This session will be convened in memoriam of Geoff Eglington, known to many as the father of modern organic geochemistry, who not only coined the term « chemical fossil », but whose work and vision included the discovery and first applications of organic proxies in paleoenvironmental studies.

Chers collègues,

Maya Gomes, David Fike, Travis Meador et moi-même animerons une session portant sur les développements analytiques récents en géomicrobiologie et géochimie organique lors de la prochaine Goldschmidt du 13 au 18 août 2017 à Paris.

Vous pouvez dès à présent soumettre vos abstracts en suivant ce lien https://goldschmidt.info/2017/abstracts et ce jusqu’au 1er avril prochain!

A bientôt,

Sarah

15e: Emerging Analytical Methods in Geobiology and Geochemistry

Keynote: Marcel Kuypers (Max Planck Institute for Marine Microbiology)

Microorganisms perform key reactions in the biogeochemical cycling of major elements on Earth. High-resolution analyses of microbial distributions and geochemical patterns in modern systems can provide evidence of energy gradients, geomicrobiological cycling, past environmental conditions and post-depositional alteration. Advances and increasing application of rapid-screening “omics” approaches now allow for highly-resolved exploration of microbial distributions in the environment. Furthermore, recent methodological and technological advances in geochemical imaging and fine-scale analyses now allow researchers to compare many different biogeochemical parameters in a single sample. This session welcomes method development and innovation studies that either (i) enhance our ability to extract paleoenvironmental information from the geological record, or (ii) target key parameters of microbial activity, such as the sources, fates, and fluxes of substrates, metabolic products, and microbial markers. We greatly appreciate techniques that can be applied over a range of natural environments and disciplines to investigate the lifestyle/activity of micro-organisms with implications for exploring the coupled evolution of life and the Earth surface system in the past and present, and to predict future changes.

Chers collègues,

Avec Jagos Radovic, Christopher Reddy, et Nathalie Dubois, nous proposons une session (11i) intitulée « Organic Geochemistry of the Anthropocene – From Stratigraphy to Earth System » à la Goldschmidt 2017 qui aura lieu à Paris.

La soumission des résumés est ouverte depuis le 1er janvier 2017 jusqu’au 1er avril.

Cordialement,

Jérémy

The Anthropocene has recently been proposed as a new geological epoch, in which human activities, such as the burning of fossil fuels, plant cultivation, soil erosion, and others, have modified the natural cycles of organic matter (OM). In addition to perturbing the cycling of natural OM and compounds, human activities released large quantities of diverse synthetic materials into the environment, which constitute multiple threats. The evolution of these complex transitions, since prehistory to the great industrial acceleration of the modern era, are reflected in equally intricate (bio)geochemical signals. In this session, we welcome contributions that address the source, fate, history, and ecosystem impacts of OM perturbations and compounds (natural and synthetic) that were released in the geological realm by human activities. In this context, showcases of novel, multidisciplinary approaches are particularly encouraged. The objective is to gather a diverse group of researchers, including archaeologists, paleoenvironmentalists, microbiologists, environmental geochemists, and others, who study the anthropogenic impacts in various media, and across temporal scales, using bulk, elemental, isotopic and molecular analyses. The session will aim to reevaluate the established (bio)geochemical concepts in relation to global change, and discuss possible solutions to alleviate the major environmental challenges presented by the Anthropocene.