Dateline unearths six new breccia pipes at US Colosseum gold play

Dateline Resources has added another serious dose of excitement to its already supercharged Californian play after geophysics lit up six new, potentially gold-rich breccia pipes at its Colosseum gold and rare earths project. 

The market duly took notice, pushing Dateline’s share price to a new fresh high of 24 cents a share on heavy trading. In just four months, the stock has rocketed an eye-watering 3900 per cent from its April low of 0.006 cents.

The company picked up the large-scale anomalies after putting the results from a recent 3D magnetotelluric (MT) survey together with data from an earlier gravity study. The analysis revealed the same striking geophysical fingerprints of coincident gravity lows and resistivity lows as two identified mineralised pipes.

The picture being painted is hard to ignore: Dateline’s North and South pipes have already historically produced 344,000 ounces of gold and further defined a 1.1-million-ounce JORC resource, pointing to a high chance of multiple discoveries.

Management says four of the new anomalies are as big, if not bigger, than the signatures tied to the current resource. The known pipes remain open at 250 metres depth and fresh MT modelling shows they plunge at least another 300m, hinting at a far bigger mineralised system than first thought.

Dateline Resources Limited managing director Stephen Baghdadi said: “The MT survey has correlated strongly with the existing 1.1-million-ounce mineral resource estimate. In June, we re-examined the 2023 gravity data alongside new geochemical results from felsite outcrops, confirming that the breccia pipes sit within gravity lows and that felsite dykes carrying gold-pathfinder elements are also coincident with gravity lows on the western margin of the pits. This convergence of geochemistry, gravity and MT resistivity data has given us confidence in six new priority targets within 1.5km of the Colosseum mineral resource.”

Among the new hot spots, Target 5 has captured plenty of attention. Stretching about 500m by 300m, it shows the broadest resistivity low of all the anomalies and plunges to a staggering 900m. Dateline says its depth and continuity point to a towering breccia body that could be packed with serious ounces.

Target 6 is proving equally intriguing, management says. The “bullseye” anomaly measures about 300 square metres and has matching gravity and resistivity lows to about 700m depth. 

Meanwhile, Targets 2 and 3, east of Colosseum’s North Pit, have lit up with distinct gravity lows. Both targets share an area with the lowest resistivity low in the entire survey area, suggesting a connected system at depth.

Target 4, south of the pit, is a shallower anomaly and could offer early ounces if its near-surface geophysical response translates into mineralisation. Target 1, just west of the South Pit, shows strong ties to felsite intrusives, already linked to gold-bearing dykes on site.

Colosseum is already a robust asset. In May, Dateline’s updated economics produced a net present value of US$550 million (A$850M) and a rapid 19-month payback at a gold price of US$2,900 (A$4450) an ounce. With the project’s gold endowment still open at depth and now six fresh bullseye targets in the crosshairs, those numbers could be in for a serious upgrade.

Dateline has two rigs already parked on site and expects the new pipes will get a thorough workover from the truth-telling bit within weeks, teeing up what could be one of the company’s most important drill campaigns yet.

Adding to Dateline’s exploration credentials, Colosseum lies less than 10 kilometres north of the world-class Mountain Pass rare earth mine – a geological cousin with striking similarities. The company says it plans to run its rare earths program in tandem with the hunt for more gold, giving punters a double shot at value creation.

If the newly discovered anomalies light up the way management expects, Dateline could be looking at a vastly bigger gold system than anyone imagined - one that could cement Colosseum’s place among North America’s more compelling gold and rare earths stories.

Is your ASX-listed company doing something interesting? Contact: matt.birney@businessnews.com.au