East Riverina Mapping Project - Overview

East Riverina Mapping Project - Overview

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  East Riverina Mapping Project- Overview Lorraine Campbell Geoscience Acquisition and Synthesis Orange Geological Survey Technical Talks 1st June 2016, Orange
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  Geological Survey TechnicalTalks 1st June 2016, Orange 21/06/2016 Geological Survey Technical Talks 1st June 2016, Orange East Riverina • 5 year project (2014-18) • Multi-discipline approach – 3D, structure, geochron, palaeo, P-T, research (U of Newcastle) • Enhance geological data in an underexplored terrane – Higher resolution mapping – Crustal framework – Constrain geological timing • Develop exploration models & mineral prospectivity – e.g. porphyry Cu-Au, orogenic Au, magmatic Sn • Quarterly project updates
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  Geological Survey TechnicalTalks 1st June 2016, Orange 21/06/2016 Geological Survey Technical Talks 1st June 2016, Orange East Riverina Qua 1.8 Tert 65 Cret 144 Jur 206 Tri 248 Per 299 Carb 359 Dev L 382 M 393 E 419 Sil L 423 E 444 Ord L 458 M 470 E 485 Wagga Group Ootha Group Cocoparra Group Shepparton Formation Bendoc Group Murray BasinKancoonaFaultZone GilmoreFaultZone Hervey Group Gidginbung, Temora Vols e.g. Barmedman Booth’ra Gp Benambran Orogeny Tabberaberan Orogeny Sn W Au Au Cu Au? S S I I e.g. Young Se.g. Koetong A e.g. Gurragong e.g. Jindera e.g. Holbrook S e.g. Burrandana Schematic only!
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  Geological Survey TechnicalTalks 1st June 2016, Orange 21/06/2016 Geological Survey Technical Talks 1st June 2016, Orange East Riverina • Field mapping mostly completed for Ardlethan & Barmedman – Currently mapping around Wagga Wagga, Temora, Narrandera & Henty • New lithological information – Depositional environments, facies – Geochemistry, textures, mineralogy • New age constraints – Field relationships – 37 x SHRIMP U-Pb zircon dates with GA • 33 magmatic history • 4 sediment provenance – Palaeontology and biostratigraphy • Bendoc Group recognised
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  Geological Survey TechnicalTalks 1st June 2016, Orange East Riverina GilmoreFaultZone S-type I-type I-type A-type Sn?
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  Geological Survey TechnicalTalks 1st June 2016, Orange 21/06/2016 Geological Survey Technical Talks 1st June 2016, Orange East Riverina • New geophysical data and interpretation – Improved resolution (magnetic, gravity, radiometrics) – ASTER study (mapping, exploration) – Potential field models (mag, gravity) • Structural studies – Kinematics, strain, timing • Metamorphic studies – P-T & timing of heat / fluid transfer to the upper crust • Crustal architecture using 3D – Potential field & seismic modelling • Collaborative projects with Uni of Newcastle Source: Venkataramani et al. 2016
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  Geological Survey TechnicalTalks 1st June 2016, Orange 21/06/2016 Geological Survey Technical Talks 1st June 2016, Orange Ardlethan Produced: >25 000 t Sn Resource: 37.5 Mt @ 0.17% (66 500 t) Sn (all) West Wyalong Produced: >13 t Au Mt Adrah Produced: >3 kg Au Resource: 20.5 Mt @ 1.1 g/t Au (770 000 oz) Adelong Produced: >20 t Au (all) Resource: Challenger 0.93 Mt @ 2.74 g/t Au (82 000 oz) Temora (PCD) Resource: 279 Mt @ 0.3% Cu, 0.2 g/t Au (826 kt Cu, 2.065 Moz Au) Temora – Gidginbung (HS epi) Production: >21t Au Resource: 23.8 Mt @ 0.1% Cu, 1.0 g/t Au (16 t Cu, 748 000 oz Au) Plus in northern Victoria … Sn (e.g. Pilot Range), Mo (e.g. Everton), Au (e.g. Beechworth) Burrandana Produced: >7 t W Mt Paynter Produced: >3 t Sn Resource: 0.228 Mt @ 0.35% Sn, 0.51% W (798 t Sn1163 t W) East Riverina • Mineral Systems work • Improved MetIndex data – Location, style, etc. • HyLogger™ – New holes scanned & uploaded to AuScope • Isotopic studies – Timing (Ar-Ar, U-Pb) – Nature of fluids (S, Pb) • Tin prospectivity study (CET) • Developing exploration models & prospectivity maps
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  Geological Survey TechnicalTalks 1st June 2016, Orange