The Ayshia copper-zinc deposit has increased total resources at the Whundo Project by one-third from 2.7Mt to 3.6Mt, as well as the total metal content by 54% to 93,000t copper and zinc with an in-situ value of over $600 million.

GreenTech Metals’ (ASX:GRE) Ayshia deposit is one of several copper-zinc prospects which comprise the Whundo project, south of Karratha Industrial hub in Western Australia’s Pilbara.

Based on historical drilling, the combined Whundo–Ayshia JORC 2012 inferred and indicated mineral resource estimate (MRE) now sits at 3.6Mt at 1.2% copper and 1.4% zinc.

The maiden inferred MRE at Ayshia stands at 0.92Mt at 1.3% copper, 2.3% zinc, 0.1% lead, 0.2g/t gold and 12g/t silver, with a total 33,000t copper-zinc metal.

Importantly, the above resource estimates do not include results pending from the Q1 drilling program, comprising 32 holes and 4,904m of drilling across Whundo and Ayshia.

GreenTech Metals
Pic: Supplied

Multiple prospects to be investigated

GreenTech executive director Thomas Reddicliffe said the company expected further increases to the combined resource at Whundo to come after assay results from the recent reverse circulation drilling program have been received.

“In addition, we have multiple other prospects including the Yannery copper project next to Whundo, which are yet to be investigated,” he said.

The project comprises several known stratigraphically related copper-zinc VMS style deposits and prospects over a strike length of 1500m within a prospective zone of 4km within the project tenement.

First class infrastructure including roads, electricity, water and a processing plant exist within the vicinity of the Whundo project with the Ayshia deposit about 1,500m to the northeast of the Whundo Mine.

GreenTech Metals
Pic: Supplied

Geology and geological interpretation

The Whundo/Ayshia deposits are copper-zinc VMS deposits occurring stratigraphically above a 2-3km thick sequence of intermediate volcanics called the Nallana Formation. The West Whundo deposit outcrops as a gossan within chloritic schists folded around a synclinal closure.

The copper-zinc deposits at Whundo and West Whundo are confined to a single stratigraphic horizon as a series of NW to NNW plunging shoots.

Looking ahead

GRE says the mineral resource estimate for Ayshia is based entirely on historic drill data and using current commodity prices – results from the 2022 drilling campaign have not been included.

The receipt of assay results has been delayed by sample congestion issues at the laboratory that are affecting the industry generally.




This article was developed in collaboration with GreenTech Metals, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.