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Geological Mapping techniques to enhance mineral exploration

Geological Mapping techniques to enhance mineral exploration. L.J.Hutton. Improvements in Aerial photography . AGGSNA Airphoto - S of Cloncurry flown at 3500m (1935). Commonwealth1:80K RC9 Airphoto – Camooweal area flown at 7500m (25 000’) (mid 1960s).

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Geological Mapping techniques to enhance mineral exploration

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  1. Geological Mapping techniques to enhance mineral exploration L.J.Hutton

  2. Improvements in Aerial photography AGGSNA Airphoto - S of Cloncurry flown at 3500m (1935) Commonwealth1:80K RC9 Airphoto – Camooweal area flown at 7500m (25 000’) (mid 1960s)

  3. Composite radiometric and colour-draped TMI image images of the Tommy Creek area showing outline of felsic rocks

  4. Cover Unnamed granite Metadolerite Milo beds Undivided (graphitic schist, marble & calc granofels) Porphyritic felsic volcanics Mafic to intermediate lavas & clastics Graphitic schist Muscovite-garnet schist Marble, calc granofels, minor siltstone & sandstone Quartzite conglomerate & sandstone Tommy Creek Microgranite Corella Formation Chumvale Breccia Overhang Jaspilite Mitakoodi Quartzite Argylla Formation Geology of the Tommy Creek area - based on BMR-GSQ mapping (1969) Hill & others (1992) with modifications by Withnall, 2006)

  5. South-west Georgetown area: Basement interpretation

  6. Reinterpretation of a ‘cover’ area – Julia Creek 1:250K – magnetic data 1st VD image showing mafic units from the Proterozoic Soldiers Cap Group and probable magnetic units in the newly recognised Millungera Basin

  7. 3D model of Quamby area

  8. The 6 blind men and the elephant Poem by John Godfrey Saxe, cartoon by G. Renee Guzlas

  9. Five Questions • What is the geodynamic setting of the system? • What is the architecture of the system? • What are the fluids, their sources and reservoirs? • What are the fluid flow drivers and pathways? • What are the metal transport and deposition processes?

  10. Geodynamic setting is a first-order constraint on commodity type and mineralisation style and needs to be an important consideration when developing exploration strategies • Recognition of the range of geodynamic settings expands the range of possible mineralisation styles and opens up new exploration possibilities • New and innovative mineralisation models based on updated geodynamic interpretations, combined with appropriate exploration strategies, can be primary drivers for greenfields exploration success

  11. Important points • Geological maps are a prime requirement for finding new deposits • Need to understand what we are looking for • Need to understand the mineral system • If we don’t find the deposit – we can find vectors to the deposit • For under cover targeting – need geophysics.

  12. Thank you

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