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Theme Session-Ore Forming Processes

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1. Mineral systems and large-scale exploration targeting 

Mineral systems can be defined as the entire spectrum of interconnected and multi-scale geological processes whichgenerate ore deposits. An increasing number of mineralexplorers believe that many future orebody discoveries will result from a strong understanding of mineral systems at all scales - from the entire lithosphere to a single ore shoot. The key barrier to implementation of mineral systems-based exploration strategies is a lack of understanding among bothexplorers and researchers about the detailed steps requiredto translate mineral system understanding into a successful targeting strategy. Therefore, we are seeking contributions which provide a range of perspectives on mineral system understanding with specific insights on how this understanding can be used to change large- scale exploration targeting strategies and lead to greater ore discovery success.

2. Magmatic ores and their petrogenetic/tectonic setting

This session aims to outline orthomagmatic ore deposit research across a range of scales from the deposit to cratonic scale architectural controls with special reference to Ni-PGE deposits. The focus of the session is on developing innovative new techniques, challenging existing dogma, and developing spatially relevant concepts that improve an exploration geoscientist's toolbox. We strongly encourage studies focussing on the structural and tectonic setting of Ni-Cu deposits.

3. Hydrothermal processes  in ore-forming systems

Over the last decades, traditional ore deposit research, in tandem with geochemical studies of modern hydrothermal systems and geochemical modelling has contributed tremendous insights into the source, transport, and deposition of metals in hydrothermal systems. Conventional fluid inclusion thermometry combined with recent technological advances that permit direct isotopic and concentration measurements of fluids, gases, and metal in fluid inclusions have revolutionized our understanding of ore systems. Studies of modern geothermal systems, sea floor hydrothermal vents, deep crustal fluids, and basinal brines have characterized a wide range of hydrothermal systems. Constraints provided by ore genesis and modern hydrothermal studies in concert with advanced chemical and hydrologic modelling have greatly increased our understanding of fluids sources, ore-transporting ligands, mechanisms of fluid migration in crustal rocks, and the physical and chemical processes that control ore deposition.  The primary objective of this session is to bring together researchers from diverse disciplines to explore new ideas on the hydrothermal processes that lead to ore formation.

4. Dating ore deposits: geological and geochronological problems 

Geochronology is one of the most basic tools for understanding the genesis and evolution of ore-deposits. Technical and methodological developments are constantly increasing the accuracy, precision and spatial resolution of most commonly used geochronometers (e.g., U-Pb, Re-Os, Ar/Ar) providing the possibility to investigate ore-forming processes at an unprecedented spatio-temporal detail. Estimates of the duration of ore-forming process through the combined use of different geo(thermo)chronometers can greatly improve our understanding of many aspects of ore deposit genesis; providing better limits on the energy budget for hydrothermal systems, the volumes of fluid possibly involved and the spatial extent of individual ore-forming events. Geo(thermo)chronology also enables a more complete understanding of the post-mineralization history of ore-deposits particularly their rate of exhumation and prospect for preservation.  

 The goal of this session is to bring together scientists from all fields interested in answering basic questions on the temporal scale of ore-genesis; when did it occur and for how long did it last? The answers to such fundamental questions place important physical constraints in all processes active during ore-genesis. We invite scientists  from all research  fields to submit high quality abstracts for oral or poster presentations on any aspect of ore-deposit geo(thermal)chronology, including, but not restricted to:(i) the application of geochronology to solving ore deposit genesis; (ii) geochronological studies of individual deposits or mineral districts; (iii) the application of geochronology and thermal modeling to better understand the duration of ore-forming processes: (iv) developments on geochronological systems applicable to ore deposit research.

 5. Metal remobilization in the formation of hypogene and supergene ore deposits

The session will present research results from the investigation of one of the most fundamental phenomena in many, if not most, ore deposits - the redistribution of metals subsequent to initial ore formation. Such redistributions can occur during drastically different stages after primary ore genesis. Relevant hypogene remobilization processes involve diagentic recrystallization, self-organization of ore minerals, and mechanical/chemical (tectono-)metamorphic modifications, which – in many cases – control the technical mineability and/or economic viability of an ore deposit. Mobilization in the supergene environment comprises processes, in which commodity-metals can either become mobilized and reprecipitated or become residually enriched with non-ore elements being removed. Here, the supergene remobilization (and fractionation) is probably the most crucial economic factor in the formation of technically, economically and ecologically attractive deposits. Particular interest is paid to contributions that address questions of quantification of process rates, absolute age dating of events, numerical modelling of processes, 3D and more-D simulations, and experimental validation of metallogenetic process hypotheses. We invite scientists from this wide range of research topics to submit high-quality abstracts for presentations as posters or oral presentations.

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