Ora flags high gold recovery from Crown Prince testwork

Ora Gold (ASX:OAU) has reported gold recovery rates of between 98.2% and 99.8% from metallurgical testwork on samples from its Garden Gully Gold Project in Western Australia. 

The company completed gravity and cyanide leach tests on mineralisation from the flagship Crown Prince prospect within the project area, with the work highlighting the area’s ‘strong potential’ for shallow and ‘easily processable’ gold mineralisation.

While overall gold recovery rates ranged from 98.2% to 99.8%, gravity gold recoveries ranged from 66.6% to 90.5%. Ora says rapid leach kinetics showed a 90% gold recovery within 4 hours of testing through all samples. 

The company adds that when it reduced cyanide concentration as part of its optimisation testing, it observed a negligible impact on recovery rates, providing a potential pathway to reducing operating and tailing management costs. 

On top of all this, the company says the testwork showed a ‘strong positive reconciliation’ between estimated grades from drilling in the area and the gold produced from concentrates. 

Looking ahead, the company is busy completing drilling work at the Crown Prince prospect and says it considers additions to known mineralisation in the area ‘likely’.

The company will then take on some further metallurgical and bulk testing towards the middle of this year. 

Ora CEO Alex Passmore says the results from this round of testwork demonstrate that the Crown Prince mineralisation will perform ‘very well’ in a standard carbon-in-leach (CIL) gold processing scenario. 

“The company is currently drilling along-strike and down-dip from known mineralisation at Crown Prince to grow the resource which we announced in February 2024. 

In parallel, we are also committed to de-risking the project via building the understanding of the technical parameters required to appropriately evaluate a prospective production scenario.”

Ora completed the metallurgical testwork on 39 samples of varying grades from the Crown Prince area. Through the testing, the company aimed to establish key processing parameters, including head assays, gravity concentration, cyanidation of gravity tailings, and gold amenability at different grind sizes and cyanide concentrations. 

Images: Ora Gold
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Written By Joshua Smith
Joshua Smith has years of experience in the media sector, having worked as a markets reporter, features writer, and editor since completing a Communications and Journalism degree and a Creative Writing degree. Josh is an avid board game fan and a self-professed coffee snob.