12th International Platinum Symposium

Country: Russian Federation

City: Ekaterinburg

Abstr. due: 10.03.2014

Dates: 11.08.14 — 14.08.14

Area Of Sciences: Geology and mineralogy;

Address: Pochtovy 7, Yekaterinburg, 620075, Russia.

Organizing comittee e-mail: OrganizingCommittee@igg.uran.ru

Organizers: The Zavaritsky Institute of Geology and Geochemistry Uralian Division of Russian Academy of Sciences

Conference fees and accomodation: Regular registration 350 Euro


The following topics are suggested for the scientific program of the 12th International Platinum Symposium:
Session 1. Magma dynamics, cumulates and ore genesis.
Conveners: Rais Latypov (Rais.Latypov@wits.ac.za) and Steve Barnes (Steve.Barnes@csiro.au)
Keynote speaker: Christian Tegner

Session focus. Magmatic ore deposits produced by mafic-ultramafic magmatism (e.g. massive sulphide bodies, chromitite and Fe-Ti oxide layers, platinum group element-rich horizons) are igneous cumulate rocks that are generated by processes of magma differentiation, crystallization and solidification in crustal chambers. Therefore a key to understanding the origin of these deposits and consequently to developing a better strategy for their exploration is the deep knowledge of physico-chemical processes that govern magma evolution in crustal chambers and conduits. This session will emphasize the physical and fluid dynamic aspects of igneous petrology that bear on three major ore-related questions: where are ore deposits located? how did they get there? and how were they produced? The following fundamental aspects of magmatic processes will be addressed by this session: the relative importance of in situ crystallization versus crystal settling in evolving magma chambers and the origin of layering; the role of thermal and compositional convection in magma differentiation; the effects of compaction and post-cumulus melt migration within the cumulate pile on compositional profiles of magmatic bodies; the interactions between resident melt in the chamber and inflowing magma during chamber replenishment events; and the fluid dynamics and emplacement mechanisms of magmas, crystal slurries and emulsions. This session welcomes field, textural, mineralogical, geochemical, isotopic, experimental and numerical examination of igneous intrusions that provide us with new ideas on how magma chambers and conduits work to produce magmatic ore deposits.

Session 2. PGE mineralization in mafic-ultramafic intrusions of Russia: geology and petrogenesis.
Conveners: Alexey Ariskin (ariskin@rambler.ru) and Wolfgang Maier (MaierW@cardiff.ac.uk)
Keynote speaker: Sarah-Jane Barnes and Andrey Izokh

The session will focus on PGE mineralized mafic to ultramafic intrusive complexes of Russia. We invite presentations that provide information on their geology, petrology, mineralogy, and geochemistry and that help to constrain the petrogenesis of the intrusions and their different styles of PGE mineralization. Contributions dealing with sulfide and chromite transport in the parental magmas, and percolation of sulfides and volatiles through the cumulate pile are particularly welcome, as are talks and posters that have implications for exploration targeting, using a variety of techniques and vectors.

Session 3. PGE-Cu-Ni sulphide-bearing ultramafic-mafic intrusions of the Noril'sk Province: insights into ore genesis and exploration.
Conveners: Kreshimir Malitch (dunite@yandex.ru) and Chusi Li (cli@indiana.edu)
Keynote speakers: Nicholas Arndt and Nadezhda Krivolutskaya

Despite the long-term study of the ‘Noril’sk-type’ intrusions (e.g., Noril`sk-1, Talnakh and Kharaelakh), they remain a subject of ongoing debate related to their origin. A broad range of different or contradictory ideas for the formation of ore-bearing ultramafic-mafic intrusions in the Noril’sk region has been proposed. These include (a) differentiation of a single magma, (b) emplacement of multiple magmas with distinct compositions, (c) volcanic feeder systems, (d) a crust-mantle interaction model, (e) assimilation and (f) metasomatic models. A common assumption in these models is that the intrusions are coeval with the 250 Ma Siberian flood basalts, which erupted over a period of ~1 Ma or less, despite the fact that the age range of the intrusions is considerably larger. We invite contributions that use mineralogy, petrology, geochemistry, geochronology and structural controls to improve our understanding on the origin of ultramafic-mafic intrusions with different degrees of PGE-Cu-Ni sulphide mineralisation (i.e., economic, subeconomic and non-economic) in the Polar Siberia. New isotope-geochemical data that can be used for the exploration of PGE-Cu-Ni sulphide deposits are particularly welcome.

Session 4. Models and exploration methods for magmatic Ni-Cu-PGE sulphide and PGE-oxide deposits from around the World.
Conveners: Sarah-Jane Barnes sjbarnes@uqac.ca), Marina Yudovskaya (maiya@igem.ru) and Judith Kinnaird (judith.kinnaird@wits.ac.za)
Keynote speakers: Edward Ripley and Alexandr Sobolev

The session is intended to cover how magmatic platinum-group element (PGE) deposits form and how to use this information to explore for them. The concentrations of PGE in ore are generally only at the g/tonne level and thus the fact that the rocks are enriched in PGE is not evident in hand specimen. Furthermore most PGE are not readily soluble and thus there is no halo around ore bodies. Therefore exploration for PGE deposits depends heavily on a combination of lithogeochemical sampling and searching for minerals such as Ni-Cu sulphides and oxides (in particular chromite) that are present in many PGE deposits. Consequently how Ni-Cu sulphide and oxide deposits form and why some contain platinum-group elements and some do not is also of interest in studying how PGE deposits. Papers describing models for the formation of and exploration techniques for the deposits are welcome.

Session 5. Ophiolites and Ural-Alaskan-type intrusions: traditional and innovative looks on the PGM formation.
Conveners: Evgeny Pushkarev (pushkarev.1958@mail.ru) and Edward Ripley (ripley@indiana.edu)
Keynote speaker: Giorgio Garuti

The session will focus on the PGE enrichment and platinum-group minerals formation in chromitites and ultramafites of ophiolite complexes and Ural-Alaskan-type intrusions. Potential topics include: 1) Chromite and PGM formation in ophiolite and Ural-Alaskan intrusions – why do the huge chromite deposits in ophiolites contain relatively low concentrations of PGEs relative to the Pt-rich chromitites from Ural-Alaskan intrusions. 2) Geological, mineralogical, geochemical and experimental studies on the association between chromite and PGMs. 3) The role of high- and low-temperature fluids in the formation and distribution of PGEs in chromitites and ultramafic rocks. 4) The genesis of unusual sulfide-rich PGE mineralization in Ural-Alaskan intrusions. 5) PGMs are from source to placer - only accumulation or transformation? The unique PGMs placers of the World.

Session 6. PGE and Au through experiments (the session will be sponsored by SGA).
Conveners: Alexander Borisov (aborisov@igem.ru) and Anna Vymazalova (anna.vymazalova@geology.cz)
Keynote speakers: Chris Ballhaus and Boris Tagirov

The session will focus on experimental studies of PGE and Au solubility in sulphides and silicate melts, PGE and Au partitioning between phases as well as PGE minerals stability and composition at T-P range from magmatic to hydrothermal conditions. Also contributions focused of phase equilibria in PGE-Au systems, and thermodynamic properties of PGE minerals and phases are welcomed.

Session 7. New advances in the understanding of PGE mineralogy from magmatic to supergene environments (the session will be sponsored by SGA).
Conveners: Tanya Evstigneeva (evst@igem.ru) and Federica Zaccarini (federica.zaccarini@unileoben.ac.at)
Keynote speaker: Thomas Oberthuer

The platinum group elements (PGE) form specific phases, the so called platinum group minerals (PGM) or they occur in solid solution, as trace and ultra-trace elements, mainly in sulfide and oxides. With few exceptions, the PGM form minute inclusions, generally less than 50 microns in size. Thus, their identification and characterization is a difficult target. It is also not easy to determine the amount of PGE occurring in solid solution because of their low concentration. Recently, the development of advanced methodology and scientific methods allow us to better characterize the PGM as well as to detect the PGE at very low concentration at the scale of ppm or ppb using in-situ techniques. Contributions that describe the latest in analytical methods and applications to PGE mineralogical study, including LA-ICPMS, PIXE, XRD, EPMA, SEM are welcome. Abstracts discussing other techniques are also strongly encouraged.

Session 8. Open Session.
Conveners: Elena Anikina (Elena.Anikina@igg.uran.ru) and Frank Melcher (frank.melcher@unileoben.ac.at)
Keynote speakers: Thierry Auge and Kreshimir N. Malitch

This session intends to highlight various aspects of PGE research in geological environments that are not covered by topics of the other sessions. The session also welcomes contributions with focus on PGE and PGM related to osmium isotopes, analytical methods, mineral processing, including quality and process control, hydrometallurgical processing, refining and product developments.

Information source:http://www.minsoc.ru/confs.php?id=22&cid=1373

Conference Web-Site: http://conf.uran.ru/default.aspx?cid=12ips