FREE virtual workshop
Program with abstracts
Dates: 2nd & 3rd December, 2021 (8h00 – 11h00 UTC-5) 6th December, 2021 (18h00 – 20h00 UTC-5)
Organizing committee: Prof. Sarah Dare (UQAC), Dr. Anne-Aurélie Sappin (GSC), and Dr. Louise Corriveau (GSC)
Description:
Regional metasomatic iron and alkali-calcic (MIAC) mineral systems generate a wide range of iron-oxide rich to iron poor economic deposit types (IOCG, IOA and affiliated critical metal deposits) with economic resources in many strategic and critical metals, such as Ag, Au, Bi, Co, Cu, F, Fe, Mo, Nb, Ni, Pb, Pd, Pt, Re, REE (both LREE and HREE), U, V, W and Zn. Enrichments in Al, As, Ba, Cd, Rb, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, Y and Zr are also significant.
The international workshop on Mineral Chemistry of Systems with IOCG, IOA and affiliated Critical Metal deposits is taking place under the umbrella of the Geological Survey of Canada-led global research network on critical metals in MIAC systems (Leader: Louise Corriveau) with team members from Canada, Australia, Europe, USA, China and the Dene First Nations. The team aims to mitigate exploration challenges induced by the intricacies of MIAC systems through novel alteration mapping protocols, geological, mineralogical, geochemical and geophysical exploration tools and regional datasets, and holistic mineral systems and petrophysic models. Additional information on the context of MIAC Mineral Systems is given at the end of this document.
This workshop will outline the textural and compositional variations of minerals, such as magnetite, hematite, apatite, sulfides and fluorite, from different IOA, IOCG, and affiliated critical metal deposits (e.g., Missouri iron metallogenic province: USA; Olympic Dam mine: Australia; Carajás Mineral Province: Brazil). The aim is to better understand the key processes responsible for the chemical signatures of minerals and their regional- to the mineral-scale variations across the breath of deposit types in these systems. Such knowledge underpins the development of better exploration tools (e.g. indicator minerals) and models (impacts of mineral compositions on rock physical properties and interpretations of 3D inversion geophysical models). It is also crucial for geometallurgy. Topics will include coupled dissolution-reprecipitation mechanisms, element partitioning between fluids and minerals, the role of fluid composition, the influence of co-crystallizing minerals and trace-element composition-induced variations on rock physical properties.
Audience: Members of the Geological Survey of Canada-led global research network on MIAC systems (researchers, industry partners, students), and anyone worldwide who is interested in mineral chemistry and IOCG-IOA systems
SESSION 1: Thursday 2nd December (8h00 – 11h00 UTC-5)
8h00 – 8h05 Welcome
8h05 – 8h25 Dr. Louise Corriveau – Metasomatic iron and alkali calcic (MIAC) mineral systems framework
8h25 – 8h45 Prof. Sarah Dare – Introduction to LA-ICP-MS and mineral chemistry for petrogenesis and mineral exploration
8h45 – 9h30 Prof. Andrew Putnis (Keynote) – Fluid-rock interaction mechanisms and the inevitable consequences for textural evolution, mass transport and mineral precipitation
9h30 –9h45 Pause
9h45 –10h15 Prof. Marek Locmelis (Invited) – The origin of the Pilot Knob IOA cluster in southeast Missouri, USA – Insight from iron oxide mineral chemistry
10h15–10h45 Dr. Celestine Mercer (Invited) – Trace element geochemistry and cathodoluminescent textures of apatite from the Missouri iron metallogenic province, USA, reveal distinct igneous and magmatic-hydrothermal origins
10h45–11h Discussion
SESSION 2: Friday 3rd December (8h00 – 11h00 UTC-5)
8h00–8h45 Prof. Adam Simon (Keynote) – Compositional variability of apatite, actinolite and magnetite in IOCG and IOA systems
8h45–9h30 Prof. Xiaowen Huang (Invited) – The links between IOA and IOCG deposits: Constraints from iron oxide textures and composition
9h30–9h45 Pause
9h45–10h15 Dr. Tobias Schlegel (Invited) – Compositional variability of fluorite in IOCG deposits and prospects of the Olympic IOCG province, South Australia – what does it tell us about Cu mineralizing fluids and IOCG deposit formation?
10h15–10h45 Dr. Eduardo Mansur (Invited) – Jaguar hydrothermal Ni deposit – using mineral chemistry to link IOA and IOCG deposits within the Carajás Mineral Province, Brazil
10h45–11h Discussion
SESSION 3: Monday 6th December (18h00 – 20h00 UTC-5)
18h00–18h45 Prof. Cristiana Ciobanu (Keynote) – Iron oxides at the nanoscale: Silician magnetite and U-rich hematite from the Olympic Dam IOCG district, South Australia
18h45–19h30 Dr. Kathy Ehrig (Keynote) – Compositional and textural variations of hematite and magnetite variation across the IOCG-IOA spectrum of deposits, Stuart Shelf, South Australia: Discovery to Recovery
19h30–20h00 Dr. Daniele Regis (Invited) – Predictive thermodynamic modelling of IOCG and affiliated alteration facies at high-grade metamorphic conditions
20h00–20h15 Discussion
For flyer and registration details, click here.
Photo credits
Left and center: zoned magnetite from El Laco IOA; Si by EMPA (left) and Nb by LA-ICP-MS (right); Dare et al. (2015).
Right: HT Na-Ca-Fe (Ab-Amp-Mag-Ap) replacement of andesite from Great Bear IOCG; Corriveau et al. (2010, 2016).