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16/4/2018 — General
Workshop and gold field trips
By Ross Louthean

Organisers of the AusIMM New Zealand Mining Conference will follow last year’s successful format of holding a gold workshop – this time on epithermal gold at the conference venue in Tauranga.

One of the successes last year at the Christchurch conference was the Otago Explorers’ Forum along with field trips in that region.

The 2018 conference, on September 17 and 18, will be preceded by an epithermal gold workshop in Tauranga and a series of field trips and site visits, including the North Island’s key gold mining centre of Waihi, operated by OceanaGold Corporation (TSX & ASX: OGC).

The organising committee told NZResources that the workshop will address key features of NZ’s epithermal deposits and their exploration, with several case histories.

A focus will be the controls on localisation and style of mineralisation at district and local scales, identifying exploration challenges and knowledge gaps that could be addressed by future research.

The workshop concept is expected to attract the growing number of gold explorers in Australia, where the ASX is registering at least three new IPOs every month.

Prior to the workshop, on Saturday September 15, there will be a tour of the historic Karangahake workings and epithermal deposits in and near Waihi.

The AusIMM said this full day tour will visit the two largest gold deposits in the Hauraki Goldfield.

At Karangahake, there will be examples shown of exposed quartz veins and hydrothermally altered rocks in the Karangahake Gorge, particularly in the spectacular Windows Walkway.

In this area New Talisman Gold Mines Ltd (NZX & ASX: NTL) is re-opening the historic Talisman mine.

At Waihi, there will be a viewing of OceanaGold’s Martha open pit mine to view exposure of the Martha vein system and locations of other veins in the broader Waihi vein system. The Waihi visit will include inspection of drill core from the Waihi vein system where exploration by OceanaGold continues to find new veins for underground mining.

Another site tour will be to the Broken Hills underground gold mine south-east of Tairua in the eastern Coromandel Peninsula.

The vein systems at Broken Hills provide a striking contrast in both vein styles and minerals compared with the larger veins in andesite hosted deposits at Karangahake and Waihi.

Any parties interested in the workshop or field tours could contact Dr Tony Christie at GNS Science. Email: t.christie&gns.cri.nz

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The public walkway at Karangahake.
Geologists and delegates from an earlier AusIMM conference viewing drill core at Waihi.