Location: Ural Federal University, Yekaterinburg, Russia
Web: http://conf.uran.ru/default.aspx?cid=12ips##3
Includes the following sessions:
Magma dynamics, cumulates and ore genesis
Convenors: Rais Latypov (rais.latypov@wits.ac.za), Steve Barnes (steve.barnes@csiro.au)
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.
Keynote speaker: Christian Tegner
PGE mineralization in mafic-ultramafic intrusions of Russia: geology and petrogenesis
Convenors: Alexey Ariskin (ariskin@rambler.ru), Wolfgang Maier (maierw@cf.ac.uk)
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.
PGE-Cu-Ni sulphide-bearing ultramafic-mafic intrusions of the Noril'sk Province: insights into ore genesis and exploration
Convenors: Kreshimir Malitch (dunite@yandex.ru), Chusi Li (cli@indiana.edu)
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.
Keynote speakers: Nicholas Arndt and Nadezhda Krivolutskaya
Includes the following fieldtrips:
Ultramafic-mafic intrusions, volcanic rocks and PGE-Cu-Ni deposits of the Noril'sk Province, Polar Siberia
Date: 1st-8th August
Leaders: Sergey Sluzhenikin (sluzh@igem.ru), Nadezhda Krivolutskaya (nakriv@mail.ru), Oleg Simonov
The Kondyor zoned clinopyroxenite-dunite massif and related platinum placers, Aldan Shield, Siberian Craton
Date: 1st-8th August
Leaders: Vladimir Prihod'ko
Platinum Belt of the Urals: world-class Nizhny-Tagil and Volkovsky massifs and associated ore deposits
Date: 15th-16th August
Leaders: Elena Anikina (elena.anikina@igg.uran.ru), Kreshimir Malitch (dunite2009@mail.ru)
Platinum Belt of the Urals: Kachkanar and Svetly Bor massifs and associated ore deposits
Date: 15th-16th August
Leader: Evgeny Pushkarev (pushkarev@igg.uran.ru)
The Ioko-Dovyren mafic-ultramafic layered intrusion in the Northern Baikal region and associated PGE-Cu-Ni deposit
Date: 15th-25th August
Leader: Evgeny Kislov (evg-kislov@yandex.ru)