Denison Mines Corp.
Atrium on Bay, 595 Bay Street, Suite 402
Toronto, ON M5G 2C2
Ph. 416-979-1991 • Fx. 416-979-5893 • www.denisonmines.com
DENISON ANNOUNCES DISCOVERY OF TWO NEW MINERALIZED
ZONES AT THE PHOENIX TREND AT WHEELER RIVER
Toronto, ON — July 15, 2010... Denison Mines Corp. (TSX:DML) (NYSE AMEX:DNN)
(“Denison” or the “Company”) is pleased to report that the summer drill program has discovered two
new mineralized zones at the extreme northeast and southwest edges of the presently defined
At the northeast edge of the Phoenix trend (Zone D in the attached map) basement-hosted
mineralization was discovered in the WR-309A area. WR-325 located a deep zone of strongly
altered graphitic pelite, with three low-grade intersections within a 66 metre continuous core length at
a depth of 100 metres beneath the much larger silicified cap. The graphitic zone contained elevated
equivalent uranium values over the full 66 metres, but less than the cut-off of 0.05% eU 3 O 8 . To date
this is the only hole to have tested this graphitic stratigraphy, and it is now an important high priority
target exhibiting potential for both unconformity and basement-hosted mineralization.
Drilling to the southwest of the Phoenix trend discovered new mineralization, shown as Zone C on the
attached map. WR-328 intersected 9.65% eU 3 O 8 over 0.8 m from 374.4 m, with an alteration
signature indicating the start of a new zone.
Both these zones are open along strike and confirm Denison’s belief that the Phoenix discovery is a
major deposit with now four discrete zones of mineralization over a length of 1,300 metres.
Summer 2010 Overview
A total of 17 holes totalling 8,344 metres have been drilled as part of this summer’s 45 hole 20,000
metre program. In addition to the drilling of several reconnaissance resistivity targets, several holes
were drilled on the margins of Zone A and in the area between Zones A and B.
Zones A, B
Six holes totalling 2,769 metres (WR-313, 315,