Langley, BC – NioGold Mining Corporation (TSX-V:NOX) (“NioGold” or the "Company") is pleased to announce that Simon Ridgway has joined the company's Board of Directors. Mr. Ridgway is an accomplished mine developer with over 30 years experience in the mining industry. Simon has been a prospector, a mining financier and is a Casey Research Explorer's League inductee. Grass roots exploration is his first love and he has had a successful career as an explorationist since starting out as a prospector in the Yukon Territory in the late 70s. Mr. Ridgway and the exploration teams under his guidance have discovered gold deposits in Honduras, Guatemala, and Nicaragua.

1. NORTH ZONE DRILLING EXPANDS SATELLITE ZONE NEAR NORLARTIC
DEPOSIT
Val-d’Or, Quebec - April 4, 2013 - NioGold Mining Corporation (TSX-V:NOX)
(OTCQX:NOXGF) (“NioGold”) is pleased to announce the results of its 18 hole, 4,395 meter
exploration drilling program of the North zone on the Marban Block (100% owned by NioGold
and under option to Aurizon).
The Marban Block contains the Kierens, Norlartic and Marban deposits which have a collective
resource estimate of 1.56 M ounces (28.5 millions of tonnes at 1.70 g/t) in the measured and
indicated categories and 0.51 M ounces (9.6 millions of tonnes at 1.66 g/t) in the inferred
category (see news release of September 7th, 2012).
The North zone is a satellite zone to the Norlartic deposit, located 200-300 metres northeast
and parallel to Norlartic and consists of three sub-zones named A (north-easternmost), B
(centermost) and C (south-westernmost).
Highlights from the North zone drill program include
• 4.47 g/t Au over 3.4 m in hole NL-13-074 at a vertical depth of 40 m.
• 3.75 g/t Au over 4.8 m and 2.93 g/t Au over 5.3 m in hole NL-13-078 at a vertical depth
of 35 m and 45 m respectively.
• 15.41 g/t Au over 2.8 m in hole NL-13-080 at a vertical depth of 80 m.
• 1.45 g/t Au over 23.4 m in hole NL-12-066 at a vertical depth of 205 m.
• 1.81 g/t Au over 7.6 m in hole NL-13-071 at a vertical depth of 130 m.
Two holes that were drilled to test the North zone were extended to a depth that also intersected
the adjacent Norlartic trend with the following results:
• 84.10 g/t Au over 1.2 m in hole NL-13-073 at a vertical depth of 215 m. For technical
reasons, this hole was abandoned before crossing the entire Norlartic structure.
• 2.18 g/t Au over 24.7 m in hole NL-13-075 at a vertical depth of 260 m.
“We are very pleased with these results, they are in line with what we expected in the North
zone” said Michael Iverson, President and CEO of NioGold. He added, “Our investigation of this
satellite zone of the Norlartic deposit is part of our goal to develop the huge potential of the
Marban Block. The results to date indicate that the North zone as well as the Norlartic and
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2. Kierens deposits may be amendable to open pit mining, as widths and grades are similar to the
Marban deposit which has been modeled for open pit extraction”.
The North zone was drilled between December 7th, 2012 and February 21st, 2013 with one drill.
Drilling comprised 4,394.6 meters in 18 holes (one an extension of a 2006 hole). The campaign
then continued on the Kierens deposit which was completed March 22nd, 2013. This program
utilized up to four drills operating on ice bridges. Results from this program will be reported
when received and compiled.
This Marban Block drilling is part of the $1.6 million program funded by NioGold. In the event of
Aurizon's decision to proceed with the Phase III program, Aurizon will immediately reimburse
Niogold for the costs of the exploration program and such amount will then be applied to
Aurizon's earn-in requirement. Aurizon has $9.0 million of spending commitments remaining on
the project as part of the Phase III program.
Drill holes results:
Easting1 Northing1 Hole Length From To Length Grade
Hole Azimuth Dip Zones2
(m) (m) (m) (m) (m) (m) (g/t Au)
NL-06-025ext 0+00 E 6+46 N N211° -57° 371.0 to 494.0 386.0 386.7 0.7 0.76 NZ C
NL-12-064 1+50 W 5+41 N N213° -54° 339.0 37.2 65.4 28.2 0.30 NNZ
117.9 118.5 0.6 2.76
143.8 144.6 0.8 3.57
216.6 221.2 4.6 0.66 NZ A
245.3 249.2 3.9 0.86 NZ B
NL-12-065 0+90 W 5+22 N N205° -61° 345.0 27.2 34.8 7.6 1.11 NNZ
238.9 249.4 10.5 1.06 NZ B
NL-12-066 0+60 W 5+02 N N213° -64° 354.0 221.4 244.8 23.4 1.45 NZ B
incl 226.6 235.8 9.2 2.52 NZ B
NL-12-067 0+15 W 4+50 N N210° -49° 237.0 102.3 103.1 0.8 4.34
145.2 146.5 1.3 2.86 NZ B
208.6 209.8 1.2 5.12 NZ C
NL-12-068 0+85 W 4+26 N N209° -54° 229.0 61.8 64.7 2.9 1.11 NNZ
114.5 116.0 1.5 4.27 NZ B
NL-13-069 1+35 W 4+29 N N215° -60° 231.0 126.4 127.4 1.0 3.09 NZ B
183.8 186.2 2.4 2.39 NZ C
193.4 198.0 4.6 2.57 NZ C
NL-13-070 1+80 W 4+59 N N208° -60° 246.0 199.9 201.0 1.1 3.55 NZ C
NL-13-071 2+25 W 4+60 N N216° -50° 254.0 119.4 121.8 2.4 1.90 NNZ
175.4 183.0 7.6 1.81 NZ B
213.0 214.7 1.7 3.45 NZ C
NL-13-072 1+80 W 4+08 N N221° -60° 150.0 52.0 53.2 1.2 4.64 NNZ
133.4 138.0 4.6 2.30 NZ B
149.0 150.0 1.0 3.60 NZ C
NL-13-073 1+80 W 3+52 N N210° -45° 322.6 77.4 82.0 4.6 1.54 NZ B
104.8 108.0 3.2 2.25 NZ C
116.8 117.7 0.9 6.15 NZ C
307.1 308.3 1.2 84.10 Norlartic
NL-13-074 1+35 W 3+48 N N207° -45° 149.0 49.0 50.2 1.2 3.50 NZ A
55.2 58.6 3.4 4.47 NZ B
91.4 94.1 2.7 3.40 NZ C
122.6 123.3 0.7 5.95
NL-13-075 0+00 E 3+77 N N208° -45° 399.0 354.8 379.5 24.7 2.18 Norlartic
incl 361.8 363.0 1.2 13.80 Norlartic
NL-13-076 4+25 W 5+40 N N211° -55° 321.0 82.6 97.0 14.4 0.64 NNZ
NL-13-077 0+50 E 3+35 N N213° -45° 129.0 71.6 72.8 1.2 3.48 NZ C
NL-13-078 2+00 E 3+47 N N211° -62° 159.0 40.0 44.8 4.8 3.75 NZ B
48.5 53.8 5.3 2.93 NZ B
NL-13-079 1+50 E 3+80 N N214° -75° 246.0 42.0 42.9 0.9 3.88
NL-13-080 2+25W 3+80N N211° -45° 161.0 96.8 103.0 6.2 1.98 NZ B
114.2 117.0 2.8 15.41 NZ C
1: Norlartic grid coordinates
2: NZ = North zone, NNZ = North North zone
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3. A map showing the location of the new holes is available at:
http://www.niogold.com/projects/maps/MarbanBlockNR-April2013.jpg
Aurizon Option
Aurizon can earn up to a 65% interest the Marban Block property under the terms of an option
and joint venture agreement dated July 5, 2010, between NioGold and Aurizon. The initial 50%
interest can be earned by incurring expenditures of $20 million over three years, completing an
updated NI 43-101 compliant mineral resource estimate, and by making a resource payment for
50% of the total gold ounces defined by the mineral resource estimate. NioGold remains the
project operator during the initial earn-in period (see news release dated July 6, 2010).
Technical Info, QA/QC and Qualified Persons
Reported intervals are in core lengths but are anticipated to approximate true width, except
where structural complexities occur, as the holes were drilled near perpendicular to the principal
local structural orientation.
Diamond drill holes were drilled with NQ-size core in order to obtain larger sample volumes of
the mineralised zones, except for holes that traversed underground workings which were
completed using BQ-size core. The core was sealed delivered by the drilling contractor to
NioGold’s facilities located at the Norlartic mine site. The core was photographed for reference,
logged and mineralised sections were sawed in half. Sample lengths vary between 0.5 to 1.5
metres. Half core samples were bagged, sealed and delivered to ALS Chemex in Val-d’Or,
Quebec, which is an accredited laboratory. The remaining core is stored on site for reference.
Samples were assayed by the fire-assay method using an atomic absorption finish on a 50-
gram pulp split. A quality assurance and quality control program (QA/QC) was implemented by
NioGold and the laboratory to insure the precision and reproducibility of the analytical method
and results. The QA/QC program includes the insertion of standards, blanks and field duplicates
in the sample batches sent to the laboratory and a systematic re-assaying of samples returning
values above 2 g/t Au by the fire-assay method using a gravimetric finish. As well, pulps grading
above 0.5 g/t Au are sent to Bourlamaque Assay Laboratories Ltd. in Val-d’Or for check
assaying.
The drilling program is conducted under the supervision of Yan Ducharme, M.Sc., P.Geo.
(OGQ), the NioGold’s Vice-president Exploration and a Qualified Person as defined by National
Instrument 43-101. This news release was prepared by Mr. Ducharme.
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 encompass seven producing gold
mines including Osisko Mining’s new Canadian Malartic operations. NioGold’s land holdings
within the Abitibi presently cover 130km2 and encompass four former gold producers, namely
the Norlartic, Kierens (First Canadian), Marban and Malartic Hygrade mines that collectively
produced 640,000 ounces of gold.
NioGold’s experienced and qualified technical team are overseeing the advancement of these
projects, with current drill programs underway targeting expansion of the resource base.
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4. NioGold invites you to visit the company website at www.niogold.com. For information on
NioGold Mining Corporation contact:
Michael A. Iverson, President & CEO Dale Paruk, Vice-President
miverson@niogold.com dparuk@niogold.com
Tel: (604) 856-9887 Tel: (604) 662-4505
Toll-free: (877) 642-6200
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 release.
FORWARD-LOOKING STATEMENTS
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 United States Exchange Act of 1934, as amended, 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 on 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.
CAUTIONARY NOTE TO U.S. INVESTORS
The United States Securities and Exchange Commission (the “SEC”) 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.
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