MD11A:
Mafic-Ultramafic Magmatic Ore Deposits I

Submit an Abstract to this Session

Session Title - en français: Gisements mafiques et ultramafiques d'origine magmatique

Session ID#: 6931

Session Description:
The formation of economic concentration of chromite, Ni-Cu-Co sulfides, PGE, Fe-Ti-V-P ore (ilmenite, magnetite, apatite) and REE minerals is the result of multiple potential processes, including fractional crystallization and accumulation, mineral sorting, magma mixing, assimilation and immiscibility. These magmatic massive to disseminated ore deposits are the crystallization products of a range of magma compositions including ultramafic and mafic basalts (from komatiites to evolved ferrobasalts), alkali-basalts and carbonatites. They are most commonly emplaced in continental flood basalts, layered intrusions and alkaline igneous complexes. This session aims to integrate recent developments in the study of ore forming processes based on field work and mapping, petrography of ore rocks (textures, CSD, 3D computed tomography), geochemistry (rock and mineral chemistry, stable and radiogenic isotopes, element mapping), experimental petrology and theoretical modelling.
OSPA Liaison:  Bernard Charlier, University of Liège, Department of Geology, Sart Tilman, Belgium
Chairs:  Bernard Charlier, University of Liège, Department of Geology, Sart Tilman, Belgium and Olivier Namur, Leibniz Universität Hannover, Institut für Mineralogie, Hannover, Germany
Primary Convener:  Bernard Charlier, University of Liège, Department of Geology, Sart Tilman, Belgium
Convener:  Olivier Namur, Leibniz Universität Hannover, Institut für Mineralogie, Hannover, Germany
Index Terms:

1036 Magma chamber processes [GEOCHEMISTRY]
1065 Major and trace element geochemistry [GEOCHEMISTRY]
3640 Igneous petrology [MINERALOGY AND PETROLOGY]
3665 Mineral occurrences and deposits [MINERALOGY AND PETROLOGY]
Co-Sponsor(s):
  • VGP - Volcanology, Geochemistry, and Petrology

Abstracts Submitted to this Session:

MD11A-01
The fine-scale chemical variation of chromite in the UG-2 chromitite and the distribution of platinum-group elements in sulfides of the Bushveld Complex, South Africa (Invited) (33790)
Malte - Junge1, Thomas Oberthür1 and Frank Melcher2, (1)Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (2)University of Leoben, Institute of Geological Sciences,, Leoben, Austria
MD11A-02
Why are Chromite-rich Rocks Enriched in Os, Ir, Ru and Rh? Constraints from the Stillwater Complex Chromitites. (35838)
Sarah-Jane Barnes1, Philippe Pagé1, Hazel M Prichard2, Micheal L Zientek3 and Peter C Fischer2, (1)Sciences de la Terre, Université du Québec à Chicoutimi (UQAC), Chicoutimi, Canada, (2)Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom, (3)USGS, Geology, Minerals, Energy, and Geophysics Science Center, Spokane, WA, United States
MD11A-03
Slab Contamination of Asthenospheric Melts Triggered the Crystallization of Chromite in the Formation of Podiform Chromite Deposits (Invited) (33316)
Mei-Fu Zhou, The University of Hong Kong, Department of Earth Sciences, Hong Kong, China
MD11A-04
ENRICHMENT OF IPGE’S IN CHROMITITE OF THE NUGGIHALLI SCHIST BELT, WESTERN DHARWAR CRATON, INDIA (33759)
Raju Pvs, NATIONAL GEOPHYSICAL RESEARCH INSTITUTE, GEOLOGICAL STUDIES DIVISION, TELANGANA, India
MD11A-05
Analogue experiments to examine the possibility of forming chromite layers by kinetic sieving during slumping of crystal slurry. (34152)
Mélanie Forien, Jonathan Tremblay, Sarah-Jane Barnes and Philippe Pagé, UQAC, Chicoutimi, QC, Canada
MD11A-06
Petrogenesis of the Fe–Ti–V–(P)-bearing Ferrogabbroic Big Mac Intrusion in the McFaulds Lake Greenstone Belt, Superior Province, Northern Ontario (Canada) (35140)
Anne-Aurélie Sappin1, Michel G Houlé1,2, Riku T Metsaranta3 and C Michael Lesher4, (1)Geological Survey of Canada, Québec, Canada, (2)Laurentian University, Sudbury, ON, Canada, (3)Ontario Geological Survey, Sudbury, ON, Canada, (4)Laurentian University, Mineral Exploration Research Centre, Department of Earth Sciences, Goodman School of Mines, Sudbury, ON, Canada
MD11A-07
Magma chamber recharge and sulfide mineralization in a Proterozoic mafic sill from the Franklin magmatic event, Victoria Island, NWT, Canada. (34456)
H Richard Naslund1, James Robert Haddad1 and Jean H J Bedard2, (1)SUNY Binghamton, Binghamton, NY, United States, (2)Geological Survey of Canada, Quebec, QC, Canada
See more of: Mineral Deposits and Ore Minerals