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October 12, 2022 at 5.30pm for 6.00pm
Club York, 95-99 York St, Sydney
Doug Menzies
Doug is mineral exploration geologist who has worked in staff positions and consulting/contracting roles. His first job out of university was on the Wafi porphyry deposit in PNG for CRA Exploration in 1993 and he was very fortunate to be able to work on the project again 18 years later for the Wafi-Golpu JV (Harmony/Newcrest JV) in 2011.
The Wafi-Golpu Porphyry Cu-Au Deposit, Papua New Guinea
The Miocene Wafi-Golpu gold-rich porphyry Cu-Au deposit and associated high sulphidation epithermal Au mineralisation is located in the Morobe Province of PNG and has a currently published total inclusive gold equivalent Mineral Resource of 19.03 Moz Aueq which includes 9500Mlb of copper, 17 Moz of silver and 81 Mlb of molybdenum (Harmony website, 2022). The Wafi Golpu porphyry Cu-Au system is bounded by a NE to NNE trending fault zone known as the Wafi Transfer and intrudes a basement sequence of weakly metamorphosed well-bedded siltstones and conglomerates of the Oligocene Langimar Formation (previously interpreted to be the Owen Stanley Metamorphics). The Langimar Formation dipping between 50-80° to the E-NE has been intruded by several copper-gold mineralised hornblende phyric to feldspar phyric diorite porphyry bodies (Harris, 2010, 2011) and a late phase phreatomagmatic diatreme breccia. The diatreme breccia is 800 x 600m in diameter, bounded by pebble dykes, and is inferred to have vented due to the presence of accretionary lapilli in layered bands at surface.
A comprehensive abstract can be accessed here.
As usual we would like to see as many as possible at the meeting to hear what will be a fascinating and informative talk on a world class deposit.
No registration required to attend in person; however registration is required to attend via Zoom – please register here.
However please do not use this as a reason not to attend if you can be there!
