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Dear Colleagues, we are pleased to announce that the 13th biennal meeting of the SGA (Society for Geology Applied to mineral deposit) will be held at Nancy, France, (24-27 August). Paper submission is in now open until February 28th. We would like to draw your attention on: Session 9: Organic matter and ore deposits: where the molecular world meets the mineral This session will explore the numerous aspects of the role of organic matter in relationship to geological metallic resources. The role of organic matter is often invoked in the formation of ore deposits. Yet organic matter is molecular material and can be gaseous, liquid, solid, in aqueous solutions, chemically well defined (like methane) or complex (kerogen, bitumen) or even alive (e.g. bacterial)! Its chemical and physical properties are numerous and change with the conditions of the geological environment. Therefore the challenges of the “mineral-organics interactions” are raised. Ore deposits geology is therefore the ideal playground where specialists of organic matter will interact with those of the mineral world to unravel the often subtle interlacing of the geological cycles involving organic carbon, micro-organisms, minerals and fluids. Hoping to see you in Nancy, http://sga2015.blog.univ-lorraine.fr/ Raymond MICHELS, CNRS, GeoRessources, [log in to unmask] Kliti GRICE, Curtin University, [log in to unmask] Lorenz SCHWARK, Universität zu Kiel, [log in to unmask]