Document:

Exhibit 4.1

 Exhibit 4.1 
 CONSENT OF TOLL CROSS SECURITIES INC. 
 Ladies and Gentlemen: 

We hereby consent to the reference under the heading “Fairness Opinion of Toll Cross” in the management information circular of JNR Resources
Inc. dated December 17, 2012 (the “Circular”) contained in the registration statement on Form F-80 of Denison Mines Corp. (the “Registration Statement”) to the opinion of our firm dated December 6, 2012 which we
prepared for the Board of Directors of JNR Resources Inc. in connection with the Acquisition Agreement, as amended, entered into between JNR Resources Inc. and Denison Mines Corp. 

 

	
	/s/ Toll Cross Securities Inc.
	Toll Cross Securities Inc.
	
	Toronto, Canada
	January 7, 2013Exhibit 4.2

 Exhibit 4.2 
 January 7, 2013 
 Independent Auditor’s Consent 

Ladies and Gentlemen: 
 We consent to the
incorporation by reference in the registration statement on Form F-80 of Denison Mines Corp. of our auditor’s report dated March 8, 2012, relating to the consolidated financial statements of Denison Mines Corp. as at December 31,
2011, December 31, 2010 and January 1, 2010 and for each of the two years ended December 31, 2011 and 2010, and the effectiveness of internal control over financial reporting of Denison Mines Corp., which appears in an Exhibit
incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp. 
  

	
	/s/ PricewaterhouseCoopers LLP
	Chartered Accountants, Licensed Public AccountantsExhibit 4.3

 Exhibit 4.3 
 CONSENT OF EXPERT 
 January 7, 2013 

The undersigned company hereby consents to (1) the references to the undersigned company’s name included or incorporated by reference in the
registration statement on Form F-80 of Denison Mines Corp. in connection with (a) the report entitled “Technical Report on the Arizona Strip Uranium Project” dated February 26, 2007, as updated for Energy Fuels Inc. entitled
“Technical Report on the Arizona Strip Uranium Project” dated June 27, 2012, (b) the report entitled “Technical Report on the Elliot Lake Property, Elliot Lake District, Ontario, Canada” dated June 29, 2007,
(c) the report entitled “Technical Report on the Uranium Exploration Properties in Mongolia” dated February 27, 2007, (d) the report entitled “Technical Report on the Henry Mountains Complex Uranium Project, Utah,
USA” dated September 9, 2006 as updated for Energy Fuels Inc. entitled “Technical Report on the Henry Mountains Complex Uranium Project, Utah, USA” dated June 27, 2012, (e) the report entitled “Technical Report on the
Denison Mines Inc. Uranium Properties, Saskatchewan, Canada” dated November 21, 2005, as amended on February 16, 2006, (f) the report entitled “Technical Report on the Mineral Resource Estimate for the McClean North Uranium
Deposits, Saskatchewan” dated January 31, 2007, (g) the report entitled “Technical Report on the Sue D Uranium Deposit Mineral Resource Estimate, Saskatchewan, Canada” dated March 31, 2006, (h) the report entitled
“Technical Report on the Midwest Uranium Deposit Mineral Resource and Mineral Reserve Estimates, Saskatchewan, Canada” dated June 1, 2005, as amended on February 14, 2006, (i) the report entitled “Technical Report on
the Tony M-Southwest Deposit, Henry Mountains Complex Uranium Project, Utah, USA” dated March 19, 2009 as updated for Energy Fuels Inc. entitled “Technical Report on the Henry Mountains Complex Uranium Project, Utah, USA” dated
June 27, 2012, (j) the report entitled “Technical Report on the EZ1 and EZ2 Breccia Pipes, Arizona Strip District, USA” dated June 24, 2009 as updated for Energy Fuels Inc. entitled “ Technical Report on the EZ1 and EZ2
Breccia Pipes, Arizona Strip District, USA” dated June 27, 2012, (k) the report entitled “Technical Report on the Hairhan Uranium Exploration Property in Mongolia” dated March 23, 2011, (l) the report entitled “The
Dibwe East Project, Southern Province, Republic of Zambia” dated March 27, 2012 and (2) all other references to the undersigned company included or incorporated by reference in the registration statement on Form F-80 of Denison Mines
Corp. dated January 2013. 
  
  

			
	 ROSCOE POSTLE ASSOCIATES INC.

		
	By:	 	/s/ Deborah A. McCombe
	Name: 	 	Deborah A. McCombe, P.Geo.
	Title:	 	President and CEOExhibit 4.4

 Exhibit 4.4 
 CONSENT OF EXPERT 
 January 7, 2013 

I, David A. Ross, P. Geo., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on
Form F-80 of Denison Mines Corp. in connection with (a) the report entitled “Technical Report on the Arizona Strip Uranium Project” dated February 26, 2007 as updated for Energy Fuels Inc. entitled “Technical Report on the
Arizona Strip Uranium Project” dated June 27, 2012, (b) the report entitled “Technical Report on the EZ1 and EZ2 Breccia Pipes, Arizona Strip District, USA” dated June 24, 2009 as updated for Energy Fuels Inc. entitled
“Technical Report on the EZ1 and EZ2 Breccia Pipes, Arizona Strip District, USA” dated June 27, 2012 and (2) all other references to the undersigned included or incorporated by reference in the registration statement on Form F-80 of
Denison Mines Corp. dated January 2013. 
  
  

	
	/s/ David A. Ross
	David A. Ross, P.Geo.Exhibit 4.5

 Exhibit 4.5 
 CONSENT OF EXPERT 
 January 7, 2013 

I, Thomas C. Pool, P.E., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on Form
F-80 of Denison Mines Corp. in connection with (a) the report entitled “Technical Report on the Arizona Strip Uranium Project” dated February 26, 2007 as updated for Energy Fuels Inc. entitled “Technical Report on the
Arizona Strip Uranium Project” dated June 27, 2012, (b) the report entitled “Technical Report on the Uranium Exploration Properties in Mongolia” dated February 27, 2007, (c) the report entitled “Technical Report on
the Henry Mountains Complex Uranium Project, Utah, USA” dated September 9, 2006 as updated for Energy Fuels Inc. entitled “Technical Report on the Henry Mountains Complex Uranium Project, Utah, USA” dated June 27, 2012 and
(2) all other references to the undersigned included or incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp. dated January 2013. 

 
  

	
	/s/ Thomas C. Pool
	Thomas C. Pool, P.E.Exhibit 4.6

 Exhibit 4.6 
 CONSENT OF EXPERT 
 January 7, 2013 

I, Leo R. Hwozdyk, P. Eng., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on
Form F-80 of Denison Mines Corp. in connection with the report entitled “Technical Report on the Elliot Lake Property, Elliot Lake District, Ontario, Canada” dated June 29, 2007 and (2) all other references to the undersigned
included or incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp. dated January 2013. 
  

					
			
	/s/ Leo R. Hwozdyk	 		 	 
	 Leo R. Hwozdyk, P.Eng.Exhibit 4.7

 Exhibit 4.7 
 CONSENT OF EXPERT 
 January 7, 2013 

I, Neil N. Gow, P. Geo., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on Form
F-80 of Denison Mines Corp. in connection with the report entitled “Technical Report on the Uranium Exploration Properties in Mongolia” dated February 27, 2007 and (2) all other references to the undersigned included or
incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp. dated January 2013. 
  

					
			
	/s/ Neil N. Gow	 		 	 
	 Neil N. Gow, P.Geo.Exhibit 4.8

 Exhibit 4.8 
 CONSENT OF EXPERT 
 January 7, 2013 

I, Richard E. Routledge, M.Sc., P. Geo., hereby consent to (1) the references to my name included or incorporated by reference in the registration
statement on Form F-80 of Denison Mines Corp. in connection with (a) the report entitled “Technical Report on the Denison Mines Inc. Uranium Properties, Saskatchewan, Canada” dated November 21, 2005, as amended on
February 16, 2006, (b) the report entitled “Technical Report on the Mineral Resource Estimate for the McClean North Uranium Deposits, Saskatchewan” dated January 31, 2007, (c) the report entitled “Technical Report
on the Sue D Uranium Deposit Mineral Resource Estimate, Saskatchewan, Canada” dated March 31, 2006, (d) the report entitled “Technical Report on the Midwest Uranium Deposit Mineral Resource and Mineral Reserve Estimates,
Saskatchewan, Canada” dated June 1, 2005, as amended on February 14, 2006, and (2) all other references to the undersigned included or incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp.
dated January 2013. 
  

					
			
	 /s/ Richard E. Routledge
	 		 	 
	 Richard E. Routledge, M.Sc., P.Geo.Exhibit 4.9

 Exhibit 4.9 
 CONSENT OF EXPERT 
 January 7, 2013 

I, James W. Hendry, P. Eng., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on
Form F-80 of Denison Mines Corp. in connection with (a) the report entitled “Technical Report on the Denison Mines Inc. Uranium Properties, Saskatchewan, Canada” dated November 21, 2005, as amended on February 16, 2006,
(b) the report entitled “Technical Report on the Sue D Uranium Deposit Mineral Resource Estimate, Saskatchewan, Canada” dated March 31, 2006, (c) the report entitled “Technical Report on the Midwest Uranium Deposit
Mineral Resource and Mineral Reserve Estimates, Saskatchewan, Canada” dated June 1, 2005, as amended on February 14, 2006, and (2) all other references to the undersigned included or incorporated by reference in the registration
statement on Form F-80 of Denison Mines Corp. dated January 2013. 
  

					
			
	 /s/ James W. Hendry
	 		 	 
	 James W. Hendry, P.Eng.Exhibit 4.10

 Exhibit 4.10 
 CONSENT OF EXPERT 
 January 7, 2013 

I, Luke Evans, M.Sc., P.Eng., hereby consent to (1) the references to my name included or incorporated by reference in the registration statement on
Form F-80 of Denison Mines Corp. in connection with the report entitled “Technical Report on the Midwest Uranium Deposit Mineral Resource and Mineral Reserve Estimates, Saskatchewan, Canada” dated June 1, 2005, as amended on
February 14, 2006, and (2) all other references to the undersigned included or incorporated by reference in the registration statement on Form F-80 of Denison Mines Corp. dated January 2013. 

 

					
			
	/s/ Luke Evans	 		 	 
	 Luke Evans, M.Sc., P.Eng.

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