NioGold's Marban Property Recovers 95.4 - 97.6% Gold in

NioGold's Marban Property Recovers 95.4 - 97.6% Gold in Metallurgical
LANGLEY, BC -- (Marketwire) -- 04/24/12 --   NioGold Mining
Corporation (TSX VENTURE: NOX) (OTCQX: NOXGF) ("NioGold" or the
"Company") is pleased to announce the results of preliminary
metallurgical testing for two composite samples from the Marban Block
property conducted by SGS Mineral Services. Ore cyanidation testing
produced results ranging from 95.4% to 97.6% gold recoveries. The
Marban Block property is located in the Malartic gold camp in the
Abitibi Region of Quebec and is subject to an earn-in by Aurizon
Mines Ltd. 
Two gold-bearing composite samples were examined at the SGS Mineral
Services Lakefield site. The #1 composite containing an assay grade
of 1.24 g/t gold was designed to study the metallurgical response of
a low grade envelope. The #2 composite containing an assay grade of
4.59 g/t gold and was designed to represent the high grade envelope.
After 48 hours, gold recoveries ranged from 95.4% to 97.6% for
composite #1 and 95.7% to 97.3% for composite #2. Finer grinding
typically increased the gold recovery at the cost of higher cyanide

                  Table #1 Ore cyanidation recovery results                 
 Sample  Size P80  Recovery 24 hours Recovery 48 hours Calculated Head grade
         (micron)         (%)               (%)               (g/t Au)      
Comp. 1     173           86.0              95.4                1.19        
Comp. 1     83            87.2              96.5                1.15        
Comp. 1     62            86.5              97.6                1.24        
Comp. 2     153           76.6              95.7                4.95        
Comp. 2     82            83.6              97.3                4.82        
Comp. 2     62            76.2              97.0                4.90        

Gravity separation testing on the #1 composite showed a 41.3% Gravity
Recoverable Gold (GRG). Gravity separation testing on the #2
composite showed a 56.5% GRG. The combination of gravity recovery and
cyanidation of the gravity tail did not increase the overall gold
recovery. This demonstrates that while this concept could be
beneficial from a plant design perspective, gravity recovery is not
essential to obtaining good recoveries from these two composites. 

                          Table #2 Gravity recovery                         
Samples            GRG                   Gravity       Calculated Head grade
        (Gravity Recoverable Gold)     concentrate            (g/t Au)      
                    (%)                   grade                             
Comp. 1            41.3                    756                  1.03        
Comp. 2            56.5                    4061                 4.19        

Bond ball mill testing indicated that the two composites fell in the
medium-soft to medium range of hardness compared to the SGS database
(10.1-10.9 kWh/t).  
While this test work is preliminary in nature and has been performed
on two composite samples the Company is very pleased with these
initial results which suggest high gold recoveries utilizing
conventional processes.  
Testing on the residue samples from composite #1 & #2 suggests that
acid generation is highly unlikely to occur from these samples.  
Qualified Person and Quality Control 
Samples selection, collection and preparation was conducted under the
supervision of Yan Ducharme, M.Sc., P.Geo. (OGQ), the Company's
Exploration Manager and a Qualified Person as defined by National
Instrument 43-101. 
Information regarding the metallurgical testwork has been prepared by
or under the supervision of Simon Lacasse, eng, Project Officer-Metallurgy of Mines Aurizon Ltd and a Qualified Person as defined by
National Instrument 43-101. 
NioGold Mining Corporation - On Canada's Golden Highway 
NioGold Mining Corporation is a mineral exploration company focused
on gold. The Company's flagship projects are located in the Cadillac
- Malartic - Val-d'Or region of the prolific Abitibi gold mining
district Quebec. The Cadillac, Malartic and Val-d'Or mining camps
have produced over 45 million ounces of gold since the 1930's and
presently encompasses six producing gold mines including Osisko
Mining's new Canadian Malartic operations. NioGold's land holdings
within the Abitibi presently cover 126km2 and encompass three former
gold producers, namely the Norlartic, Kierens (First Canadian), and
Marban mines that collectively produced 600,000 ounces of gold.
NioGold has outlined Indicated resources of 598,000 ounces gold and
Inferred resources of 361,000 ounces gold in and around these
NioGold's experienced and qualified technical team is overseeing the
advancement of these projects, with current drill programs underway
targeting expansion of the resource base. 
NioGold invites you to visit the company website at
For information on NioGold Mining Corporation contact: 
Neither the TSX Venture Exchange nor its Regulation Services Provider
(as that term is defined the policies of the TSX Venture Exchange)
accepts responsibility for the adequacy or accuracy of this news
This news release includes "forward looking statements", as that term
is defined in Section 27A of the Unites States Securities Act of
1933, as amended, and Section 21E of the Exchange Act, that are
subject to assumptions, risks and uncertainties. Statements in this
news release which are not purely historical are forward looking
statements, including without limitation any statements concerning
the Company's intentions, plans, estimates, expectations or beliefs
regarding the future. Although the Company believes that any forward
looking statements in this news release are reasonable, there can be
no assurance that any such forward looking statements will prove to
be accurate. The Company cautions readers that all forward looking
statements, including without limitation those relating to the
Company's future operations and business prospects, are based on
assumptions none of which can be assured, and are subject to certain
risks and uncertainties that could cause actual events or results to
differ materially from those indicated in the forward looking
statements. Readers are advised to rely on their own evaluation of
such risks and uncertainties and should not place undue reliance 
forward looking statements. 
Any forward looking statements are made as of the date of this news
release, and the Company assumes no obligation to update the forward
looking statements, or to update the reasons why actual events or
results could or do differ from those projected in the forward
looking statements. Except as required by law, the Company assumes no
obligation to update any forward looking statements, whether as a
result of new information, future events or otherwise. 
The United States Securities and Exchange Commission permits U.S.
mining companies, in their filings with the SEC, to disclose only
those mineral deposits that a company can economically and legally
extract or produce. We may use certain terms in this news release,
such as 'measured resources', 'indicated resources' and 'inferred
resources', which the SEC guidelines strictly prohibit U.S.
registered companies from including in their filings with the SEC.
The news release may contain information about adjacent properties on
which we have no right to explore or mine. U.S. investors are
cautioned that mineral deposits on adjacent properties may not be
indicative of mineral deposits on our properties. 
Michael A. Iverson
Chairman & CEO
Tel: (604) 856-9887 
Dale Paruk
Tel: (604) 662-4505
Toll-free: (877) 642-6200 
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