Petratherm closed up 115 per cent on Friday after the company announced it discovered high-grade titanium-rich heavy mineral sands over “several kilometres” at its Muckanippie Project southwest of Coober Pedy.

Australia, the United States, the European Union and more list titanium as a critical mineral due to its uses in electric vehicles, battery storage, wind technology, pigments and as an alloy in steel.

“The Muckanippie Suite is a rare and highly fertile layered intrusion, and this titanium discovery including high-grade, high value, titanium ores as heavy mineral sands has the potential to be transformational for the company,” Petrathrem CEO Peter Reid said.

“The mineralisation has been traced over a large-scale area and has significant potential as large tonnage direct shipment ore. The Adelaide to Darwin railway, located just 30 kilometres east of Muckanippie, offers low-cost access to ports and global markets.

“The company looks forward to drilling in October, which will expand on these significant and exciting findings to define initial grades and extent of the mineralisation.”

The company’s share price spike landed it at the top of the Winners list this week, followed by Power Minerals, AML3D, Iondrive and Investigator Resources.

The week’s biggest Loser was Copper Search Ltd, which slid more than 48 per cent on Friday on an update which disappointed shareholders.

Managing director Duncan Chessell told shareholders that the firm’s mission to find the “next large-scale copper deposit” was proving challenging.

“We have always known that Copper Search’s mission to find the next large-scale copper deposit was a high-risk, high-reward endeavour,” Chessell said.

“Over the past two years, we’ve seen indications of IOCG-style mineral systems in multiple drill holes, but pinpointing the core mineralised zone in these systems is often very challenging.

“Olympic Dam, for example, wasn’t ‘discovered’ until the 10th drill hole (RD10). While the latest results are not what we wanted, we’re looking forward to seeing the results of the second drill hole, 24PK14-B, at the Douglas Creek IOCG Prospect and Professor Schaefer’s review of the Peake Project.”

Resolution Minerals, Woomera Mining, Orpheus Uranium and LBT Innovations rounded out the Losers for the week.

The full list of Winners and Losers for the week ended 13 September:

Data via Baker Young Limited analysts.