Mad Gap
(U3O8 Limited 100%)
- Major airborne magnetic and radiometric survey has identified a number of priority uranium anomalies
- Rock Chip sampling to 4.65% U3O8
- Drill intersection to 0.21% U3O8
The Mad Gap project comprises 3 granted tenements located approximately 100 kilometres north-west of Halls Creek in the
Widely spaced shallow drilling (average 60 metres depth) beneath the outcropping uranium mineralisation returned consistently anomalous radioactivity associated with the Brown Sandstone unit. Of 23 shallow holes testing the 20 kilometres of strike at Mad Gap, 8 holes returned assays in excess of 0.05% U3O8, and two holes reported intersections of 0.2% U3O8 or greater over narrow intervals, with better intersections including 1m @ 0.208% U3O8.
Visible secondary uranium is exposed at several prospects and is clearly stratabound along a sandstone/siltstone contact within the O'Donnell Formation, immediately above the unconformity.
The Mad Gap project area forms part of the strategic tenement package acquired by U3O8 Limited in the Kimberley region of Western Australia. It abuts the U3O8 Limited - Northern Star Resources, East Kimberley Joint Venture immediately to its northeast and together covers some of the most prospective ground for unconformity style uranium mineralisation in Australia.
U3O8 Limited has flown a 34,000 line kilometres detailed magnetic - radiometric survey over the combined area of Mad Gap and the East Kimberley Joint Venture.
The tenement plan with the simplified geology is included below.
The Mad Gap project area forms part of the strategic tenement package acquired by U3O8 Limited in the Kimberley region of Western Australia. It abuts the U3O8 Limited - Northern Star Resources, East Kimberley Joint Venture immediately to its northeast and together covers some of the most prospective ground for unconformity style uranium mineralisation in Australia.
U3O8 Limited has flown a 34,000 line kilometres detailed magnetic - radiometric survey over the combined area of Mad Gap and the East Kimberley Joint Venture.
The tenement plan with the simplified geology is included below.
Mad Gap project - Regional Geology and prospects
Figure 1: Radiometric survey of the Mad Gap Project area
Figures 2-4: Close-ups of the Mad Gap, Anomaly 1, Diana and Bamboo areas
At Anomaly One, along a splay north of the Greenvale Fault, the Brown Sandstone forms a monoclinal structure dipping east, resting on phyllites of the Olympio Formation. The uranium anomalous zone extends for over 1.5 kilometres, with individual highly radioactive zones several hundred metres long. Secondary uranium minerals are present in several locations. Pit samples to 970 ppm (0.097%) U3O8 were followed up with only 3 shallow drill holes (less than 40 metres depth), none of which targeted directly the airborne and ground radiometric anomalies.
A recent visit of the project has confirmed the significance of the radiometric anomalies within the outcropping Brown Sandstone (see Figure 5), consisting primarily of secondary uranium minerals.
Figure 5: Secondary uranium minerals (autunite?) at Anomaly One
Visible secondary uranium minerals were also found several kilometres south of Anomaly One at the Diana Anomaly, within an area of anomalous radioactivity over 450 metres long, stratabound at a sandstone/siltstone contact close to the Greenvale Fault.