THE STAVELY PROJECT UNCOVERing mineral potential in western Victoria - - PowerPoint PPT Presentation

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THE STAVELY PROJECT UNCOVERing mineral potential in western Victoria - - PowerPoint PPT Presentation

Mar 30, 2023 197 likes •563 views

Speaker's notes UNCLASSIFIED THE STAVELY PROJECT UNCOVERing mineral potential in western Victoria UNCLASSIFIED Speaker's notes UNCLASSIFIED CONTRIBUTORS AND COLLABORATION Geological Survey of Victoria Ross Cayley, David Taylor, Phil

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THE STAVELY PROJECT

UNCOVERing mineral potential in western Victoria

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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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LOCATION AND GEOLOGY

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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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LOCATION AND GEOLOGY

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DEEP SEISMIC REFLECTION

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UNDERSTANDING THE MINERAL EXPLORATION HISTORY

1970 1980 1990 2000 2010 WMC take out EL’s GA-GSV Stavely Project Penzoil drill first copper targets Tony Crawford completes PhD CRAE airborne magnetic survey GSV Airborne Magnetic survey CRAE withdraw GSV Regional Seismic Reflection Modern EL’s taken out for copper exploration HMS Exploration commences GSV Stavely report Crawford & Keys publish GSV Grampians Special map report Geopeko penetrate MB (160m) mud rotary GA Willuara Report GSV identify HMS GSV VIMP drilling

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MINERALISATION AND HYDROTHERMAL ALTERATION

Corbett, 2012

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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
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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

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
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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

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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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS

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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS

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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS

Bunnagal/Dimboola Belts Boonawah/Black Range Belts Stavely/Dryden 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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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS

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PROSPECTIVITY - UNPACKING THE VOLCANIC BELTS

Bunnagal/Dimboola Belts: 382km Boonawah/Black Range Belts: 235km Stavely/Dryden Belts: 542km

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A CAMBRIAN TECTONIC SNAPSHOT

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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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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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MINERAL SYSTEMS OF THE STAVELY ARC THROUGH TIME

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The Stavely Project – UNCOVERing mineral potential in western Victoria AESC 2016 UNCOVER Symposium