 Speaker's notes
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THE STAVELY PROJECT
UNCOVERing mineral potential in western Victoria
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 Speaker's notes
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CONTRIBUTORS AND COLLABORATION
Geological Survey of Victoria
Ross Cayley, David Taylor, Phil Skladzien, Rob Duncan, Cameron Cairns, Mark McLean, Suzanne
Haydon, Melanie Middleton, David Higgins, Cassady O’Neill, Mark Hocking, Marvena Van Kann,
Gavin Stilgoe, Lydia Heap, Chris Osborne, Joanna Kowalczyk, Paul McDonald
Geoscience Australia
Anthony Schofield, Sarlae McAlpine, Chris Lewis, David Huston, Evgeniy Bastrakov, James
Goodwin, Matilda Thomas, Karol Czarnota, Tony Meixner, Tim Barton, Narelle Neumann, Richard
Blewett
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 Speaker's notes
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LOCATION AND GEOLOGY
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LOCATION AND GEOLOGY
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 Speaker's notes
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LOCATION AND GEOLOGY
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LOCATION AND GEOLOGY
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LOCATION AND GEOLOGY
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DEEP SEISMIC REFLECTION
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UNDERSTANDING THE MINERAL EXPLORATION HISTORY
WMC
take out EL’s
Crawford &
Keys publish
1970
GA Willuara
Report
CRAE airborne
magnetic survey
1990
GSV
identify
HMS
Penzoil drill first
copper targets
CRAE
withdraw
HMS Exploration
commences
1980
Modern EL’s taken out
for copper exploration
2000
GSV Grampians
Special map
report
Geopeko
penetrate MB
(160m)
mud rotary
Tony Crawford
completes PhD
GSV Stavely
report
2010
GA-GSV
Stavely Project
GSV VIMP
drilling
GSV Airborne
Magnetic survey
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GSV Regional
Seismic Reflection
 Speaker's notes
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MINERALISATION AND HYDROTHERMAL ALTERATION
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Corbett, 2012
 Speaker's notes
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COVER AND PRESERVATION
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COVER AND PRESERVATION
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COVER AND PRESERVATION
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COVER AND PRESERVATION
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KEY FINDINGS FROM NEW DATA
Mineralisation
• Mineralised porphyries: 501-500Ma (U-Pb zircon), molybdenite mineralisation: 502-503Ma (Re-Os) within error
• Mineralised porphyries are not confined to volcanic belts – search space expanded
• Porphyries occupy fertility window of Louks (2014)
• Current known mineralised porphyries post date D1 (Delamerian) - upright
UNCLASSIFIED
UNCLASSIFIED
KEY FINDINGS FROM NEW DATA
Mineralisation
• Mineralised porphyries: 501-500Ma (U-Pb zircon), molybdenite mineralisation: 502-503Ma (Re-Os) within error
• Mineralised porphyries are not confined to volcanic belts – search space expanded
• Porphyries occupy fertility window of Louks (2014)
• Current known mineralised porphyries post date D1 (Delamerian) - upright
Exploration
•
•
•
•
•
•
•
Passive seismic suitable technique for estimating depth to basement
Suitable drilling techniques and depth of cover – proof of concept
Hyperspectral scanning (Hylogger) suggests distal propylitic hydrothermal alteration and pyrophyllite coincident with min
• More work required to characterise hydrothermal alteration and mineralisation
Favourable chlorite and epidote trace element geochemistry in vicinity of Eclipse prospect
Partial leach surface geochemistry orientation survey
Groundwater geochemistry and water bore re-logging
Scalable structural template: Devonian vs Cambrian deformation characteristics
• Porphyry event north-south orientation, Devonian northeast-southwest
UNCLASSIFIED
UNCLASSIFIED
KEY FINDINGS FROM NEW DATA
Mineralisation
• Mineralised porphyries: 501-500Ma (U-Pb zircon), molybdenite mineralisation: 502-503Ma (Re-Os) within error
• Mineralised porphyries are not confined to volcanic belts – search space expanded
• Porphyries occupy fertility window of Louks (2014)
• Current known mineralised porphyries post date D1 (Delamerian) - upright
Exploration
•
•
•
•
•
•
•
Passive seismic suitable technique for estimating depth to basement
Suitable drilling techniques and depth of cover – proof of concept
Hyperspectral scanning (Hylogger) suggests distal propylitic hydrothermal alteration and pyrophyllite coincident with min
• More work required to characterise hydrothermal alteration and mineralisation
Favourable chlorite and epidote trace element geochemistry in vicinity of Eclipse prospect
Partial leach surface geochemistry orientation survey
Groundwater geochemistry and water bore re-logging
Scalable structural template: Devonian vs Cambrian deformation characteristics
• Porphyry event north-south orientation, Devonian northeast-southwest
Tectonics
•
•
•
•
Serpentinities have similar Cr# (chromite), including Hummocks Serpentinite to west
No detrital zircon younger than ~540Ma in Glenthompson Sandstone
Earliest known igneous activity of Stavely Arc (to date) 510Ma – stratigraphy suggests older ‘boninitic’ rocks
Current known mineralised porphyries represent (low to med K) calc-alkaline magmatism
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 Speaker's notes
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
Stavely/Dryden Belts
Bunnagal/Dimboola Belts
Boonawah/Black Range Belts
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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 Speaker's notes
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
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 Speaker's notes
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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS
Stavely/Dryden Belts: 542km
Bunnagal/Dimboola Belts: 382km
Boonawah/Black Range Belts: 235km
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 Speaker's notes
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A CAMBRIAN TECTONIC SNAPSHOT
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 Speaker's notes
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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 Speaker's notes
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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 Speaker's notes
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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 Speaker's notes
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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 Speaker's notes
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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME
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UNCLASSIFIED
The Stavely Project – UNCOVERing
mineral potential in western Victoria
AESC 2016
UNCOVER Symposium
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