MEGWA November 2023 Meeting
Ingredients for high-grade IOCG mineralisation – insights from new data and thermodynamic modelling
The talk will focus on the similarities and differences of 3 major IOCG deposits, namely Starra, Ernest Henry and Prominent
Hill. Systematically collected mineralogy combined with petrophysical and structural datasets from the Starra and Ernest
Henry deposits enable a consistent model for IOCG deposit formation in which hydrolytic alteration plays an essential role
in high-grade Cu-Au mineralisation. The deposit-scale distribution of key mineral assemblages indicates that hydrothermal
alteration produced a mappable mineral zoning in each deposit. Although the mineral zonings present at Starra and Ernest
Henry differ in size and style, they resulted from a sequence of iron oxide-alkali-calcic alteration, shearing, brecciation,
and previously unrecognized hydrolytic alteration, which was coincident with the location of high-grade Cu-Au mineralization.
The outcomes from Starra and Ernest Henry will be compared with data from the Prominent Hill IOCG deposit.
Bar opens at 5:30PM, talks start at 6:00PM.
Speaker
Tobias Schlegel, Senior Research Scientist, CSIRO
Cost
FREE
Zoom meeting details
Please click the link below to join the webinar:
https://us02web.zoom.us/j/88063579174?pwd=U0VDejJibzZub3dNczJKTmY0Y0xXQT09
Passcode: 524771
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