Unravelling the complex microstructure and geochemistry associations of Cu-Zn-Pb ore deposits

  • Daczko, Nathan (Primary Chief Investigator)
  • Hu, Siyu (Supervisor)
  • Dyriw, Nick (Supervisor)

Project: Research

Project Details

Description

Ore deposits in the globally significant base metal province of the Mount Isa Inlier are complicated by deformation events with mineralisation timings that range from pre- to syn- to post-tectonic. Detailed mapping and observations of the ore bodies relative to key deformation structures, including regional foliations, shear zones and fault zones, commonly allow for a structural paragenesis to be developed for each ore deposit. Sometimes regional implications on the genesis of mineralisation during the Isan Orogeny of the Mount Isa Inlier can be made. However, there have been no structural investigations to date that have utilised EBSD methods to interrogate the microstructure of sulphide ore minerals to understand their internal deformation history and to relate this to the well characterised regional structures. This Project aims to build on the well-characterised structural history of the Mt Isa region by addressing the following:
(1) Characterise the microstructure (including EBSD analysis), microchemistry, mineral assemblage, of representative samples of unmineralised and mineralised rocks at a range of Cu- Zn-Pb ore deposits in the Mt Isa region.
(2) Assess the timing relationship between regional deformation events and microstructural characteristics.
(3) Evaluate and date key mineral assemblages in the structural paragenesis and mineralisation.
(4) Explore the usefulness of the EBSD method in the microstructural characterisation of ore deposits to better understand the timing of their formation and subsequent deformation and reaction history.
StatusActive
Effective start/end date15/12/2314/12/28