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- Part of company’s systematic follow-up of the Big One along-strike surface anomaly
- In situ rock chip results of 1.30% Cu and stockpile sampling returned up to 7.76% Cu
- Copper oxide minerals were observed within altered trachyte dyke and adjacent haematite-altered sedimentary rocks
- Structural measurements in costeam are consistent with mineralised fault structure in Big One pits
New Frontier Minerals (ASX: NFM) has made promising observations in structural mapping and rock chip sampling completed at the Big One deposit within its NWQ Copper project in North-West Queensland.
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The field program followed up the company’s previous surface sampling and mapping at Big One, which defined a copper anomaly indicating that mineralisation extends southwest approximately 400m along strike from the historical workings from Pit 14.
Copper mineralisation at Big One is hosted along a north-east trending fault intruded by a trachyte dyke, with malachite staining observed along at least 600m of strike, of which approximately 200m has been exploited by historical open pits.
The 2026 field program focused on a historical costean approximately 400m southwest of Big One Pit 1, located on this structural trend. Detailed structural mapping recorded the orientation of the in-situ shear zone exposed in the costean, and six rock chip samples were collected from the costean, an adjacent stockpile and near Pit 1 for laboratory analysis. The work was designed to further characterise the mineralised structure beyond the historical pits and to refine targeting for the company’s next drill program at Big One.
“This program was designed to follow up the copper anomaly previously defined southwest of the pits. The structural readings in the costean line up with the fault that hosts the Big One resource, and the in-situ samples along the shear returned up to 1.30% copper,” chairman, Gerrard Hall, said.
“This part of the structure has never been drilled and sits within an area which has already received heritage clearance.”
The Big One deposit is located approximately 90km north of Mt Kelly processing facility, within EPM 26574. The Big One deposit resides within mining lease application ML100479 and hosts a JORC (2012) mineral resource estimate of 2.1 million tonnes (Mt) at 1.1% copper for 21,886 tonnes contained copper (0.45% Cu cut-off), predominantly in the Inferred category.
NFM was steady at 0.5¢ with a Mkt cap of $8.691M.
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