Denison Announces High Grade Uranium Drill Intersections at Mann Lake and Wheeler River
Press Release
TORONTO, ONTARIO–(Feb. 4, 2015) – Denison Mines Corp. (“Denison” or the “Company”) (TSX:DML)(NYSE MKT:DNN) is pleased to report a successful start to its winter exploration programs with high grade uranium drill intersections on two different properties, Mann Lake and Wheeler River, in the Eastern Athabasca Basin. Mann Lake is located 20 kilometres southwest of the McArthur River mine and five kilometres north of Wheeler River and is a joint venture (Denison 30%) with Cameco Corp (52.5% and operator) and Areva Resources Canada (17.5%). Wheeler River is a joint venture (Denison 60% and operator) with Cameco Corp (30%) and JCU (Canada) Exploration Company, Limited (10%).
“We are encouraged by the high grade intersections at Mann Lake, Denison’s most recent addition to its Athabasca Basin exploration portfolio, and by the additional high grade intersections at Wheeler River as we focus on expanding our Gryphon discovery”, commented Ron Hochstein, CEO of Denison.
Mann Lake
Drilling at Mann Lake in 2015 is designed to explore for extensions of uranium mineralization intersected in drill holes MN-060 (2.94% U3O8 over 4.8 metres) and MN-065 (4.8% U3O8 over 1.0 metres) in 2014. Uranium in these drill holes is located along the sub-Athabasca unconformity at its intersection with a fault zone. Two of 12 planned drill holes have been completed in the current program. Drill hole MN-066-01 located 300 metres along strike south of MN-060, intersected 9.8% eU3O8 over 3.5 metres – the best result to date on the Mann Lake property. As MN-066-01 is the furthest drill hole to the south on the zone, mineralization is open beyond it. The other drill hole, MN-061-01, located 900 metres north of MN-060 intersected weakly elevated radioactivity immediately beneath the unconformity. The drilling results are summarized in Table 1. Figure 1 shows the location of the Mann Lake drill holes in plan view. As the drill holes are oriented steeply, and the mineralization is approximately horizontal, the true thickness is expected to be at least 80% of the intersection lengths.
Wheeler River
The winter 2015 drill program at Wheeler River is designed to extend the Gryphon zone of basement hosted uranium mineralization discovered in 2014. Mineralization at Gryphon is hosted in basement gneisses, ranging from 100 to 250 metres below the sub-Athabasca unconformity. Prior to the start of the current drill program the zone was 350 metres long (along the plunge) by 60 metres wide (across the plunge). The zone consists of multiple stacked lenses with variable thicknesses that plunge to the northeast and remain open both up and down-plunge. The initial drill holes of this year’s program are designed to test for extensions of mineralization in both the up-plunge and down-plunge directions. Four of a planned 22 drill holes have been completed so far and the highlight is drill hole WR-584B on the up-plunge end of the zone, which intersected 9.0% eU3O8 over 4.6 metres. WR-584B extends the Gryphon zone approximately 50 metres. Two drill holes targeting the down-plunge extension of mineralization have also been completed. WR-582 and WR-583 intersected 2.9% eU3O8 over 2.4 metres and 2.8% eU3O8 over 2.4 metres, respectively. These holes extend the Gryphon zone approximately 50 metres down-plunge. A fourth hole, WR-577D1 was also completed at the up-plunge end of the zone, approximately 50 metres from WR-584B and it intersected several narrow, weak intervals of mineralization, the best of which was 0.3% eU3O8 over 2.0 metres. The drill results are summarized in Table 1. Figure 2 shows the location of the Gryphon zone drill holes on an inclined longitudinal section. As the drill holes are oriented steeply toward the northwest and the mineralization dips moderately to the southeast, the true thickness is expected to be approximately 75% of the intersection lengths.
IBF2
