NAI

Northern Abitibi Mining Corp. (TSX VENTURE:NAI) ("Northern Abitibi") is pleased
to announce that a second resource estimate has been completed for the Thor
Trend Deposit on the company's 100% owned Viking gold property in Newfoundland.
The new independent mineral resource estimate study was conducted by Giroux
Consultants Ltd. This estimate follows up an initial mineral resource estimate
completed by Mercator Geological Services Limited on March 2, 2011. The new
resource is based on 109 holes drilled into the Thor Trend and includes 20 holes
drilled after the initial resource estimate. The new estimate was completed in
accordance with Canadian Securities Administrators National Instrument 43-101
("NI 43-101") and the CIM Standards on Mineral Resources and Reserves, and has
an effective date of November 1, 2011.


Results of the new resource estimate are summarized in the table below. 

At a cut-off grade of 0.20 g/t gold, the Thor Trend deposit contains an
indicated resource of 98,000 ounces gold (3,232,000 tonnes at an average grade
of 0.95 g/t) plus an inferred resource of 45,000 ounces gold (2,123,000 tonnes
at an average grade of 0.66 g/t). These new results represent a 55% increase in
grade over the previous estimate and a 16% increase in contained ounces.
Approximately 80% of the contained gold ounces have been upgraded from the
inferred to the indicated category.




                       THOR TREND - MINERAL RESOURCES                       
----------------------------------------------------------------------------
                  Tonnes greater than    Grade greater than                 
Au Cut-off                   Cut-off                Cut-off        Contained
(g/t)                       (tonnes)               Au (g/t)     Ounces Au(i)
----------------------------------------------------------------------------
                           Indicated                                        
----------------------------------------------------------------------------
0.10                       3,593,000                   0.87          100,000
----------------------------------------------------------------------------
0.20                       3,232,000                   0.95           98,000
----------------------------------------------------------------------------
0.50                       1,817,000                   1.42           83,000
----------------------------------------------------------------------------
1.00                         937,000                   2.09           63,000
----------------------------------------------------------------------------
2.00                         357,000                   3.19           36,600
----------------------------------------------------------------------------
3.00                         147,000                   4.33           20,500
----------------------------------------------------------------------------
                                                                            
----------------------------------------------------------------------------
                            Inferred                                        
----------------------------------------------------------------------------
0.10                       2,459,000                   0.59           47,000
----------------------------------------------------------------------------
0.20                       2,123,000                   0.66           45,000
----------------------------------------------------------------------------
0.50                         847,000                   1.15           31,000
----------------------------------------------------------------------------
1.00                         350,000                   1.79           20,000
----------------------------------------------------------------------------
2.00                          94,000                   2.90            8,800
----------------------------------------------------------------------------
3.00                          29,000                   4.10            3,800
----------------------------------------------------------------------------
  (i)Mineralized domains are spatially constrained and capped.              



Mineral resources are not mineral reserves and by definition do not demonstrate
economic viability. There is no certainty that all or any part of the mineral
resource will be converted into mineral reserves. An 'Indicated Mineral
Resource' is that part of a Mineral Resource for which quantity, grade or
quality, densities, shape and physical characteristics can be estimated with a
level of confidence sufficient to allow the appropriate application of technical
and economic parameters, to support mine planning and evaluation of the economic
viability of the deposit. An 'Inferred Mineral Resource' is that part of a
Mineral Resource for which quantity and grade or quality can be estimated on the
basis of geological evidence and limited sampling and reasonably assumed, but
not verified.


Highlights



--  55% increase in the average grade 
--  16% increase in contained ounces 
--  The bulk of the resources have been upgraded from inferred to indicated
    category 
--  Room for expansion and excellent exploration potential on the property 
--  Discovery cost of roughly $28/ounce (Indicated + inferred categories) 



Dr. Shane Ebert, President of the Company commented, "The significant increase
in grade seen after further drilling and the upgrade from inferred to indicated
resource categories is a significantly step forward for the Viking project.
There remains excellent potential to increase both the grade and the contained
ounces in the Thor Trend deposit through detailed drill delineation or
underground exploration of the known high grade shoots that occur throughout the
zone. The resource, although modest in size, has potentially favorable open pit
geometry, excellent metallurgy, and is situated in a mining friendly
jurisdiction adjacent to roads and power. The company is looking at a number of
options to maximize the value of the Viking asset and continue to move the
project forward."


Resource Details  

The resource estimation was carried out by Giroux Consultants Ltd of Vancouver,
British Columbia and Independent Qualified Person Gary Giroux, P.Eng is
responsible for the estimate. The resource estimate is based on a database
containing 109 holes drilled into the Thor Trend totaling 15,574 m of diamond
drilling, and 74 lines of surface channel samples cut from trenches using a
diamond saw. 


Mineralization was constrained within 3D geologic solids built using Gemcom
software. Some isolated high gold assays sit outside the mineralized solids and
have not been included in the resource estimate. The distributions of gold
within and outside the mineralized solids were examined using lognormal
cumulative distribution plots and 6 overlapping gold populations were
identified. Gold assays within the mineralized solid were capped at 66 g/t gold
while those outside the solid were capped at 4.0 g/t gold. There is insufficient
drill data at present to accurately model the high grade zones along the Thor
Trend so an indicator approach was used to model the high grade.


Drill hole assay samples were composited into 2.5 metre intervals and a block
model with 5m x 5m x 5m block size was created. Grades for gold were
interpolated into all blocks, by a combination of Ordinary and Indicator
Kriging. North-south cross sections showing the kriged block Au grades and drill
hole composites were produced to validate the block model and in general the
block grades match the composite grades well and there is no indication of bias
present.


A Technical Report describing the resource estimate is expected to be filed on
SEDAR within 45 days. 


The Viking Property

The Viking Property contains numerous high grade veins within larger bulk
tonnage style zones of gold mineralization located within a 3 to 4 kilometre
long gold-in-soil anomaly. Drilling highlights include high grade intercepts of
5.75 metres grading 33.7 g/t gold, 3.7 metres grading 50.1 g/t gold, 0.5 metres
grading 218.8 g/t gold as well as lower grade intercepts including 27 metres
grading 7.9 g/t gold, 23.0 metres grading 5.1 g/t gold, and 57.4 metres grading
2.8 g/t gold. The Viking property is located in the mining friendly jurisdiction
of Newfoundland and Labrador and has excellent access and local infrastructure,
with a paved highway and power line located less than one kilometre from the
project. Northern Abitibi has a 100% property interest in the Viking project
subject to a 2% to 4% sliding scale net smelter royalty held by Altius
Resources. A detailed description of the Viking project is available on our
website (www.naminco.ca).


Quality Control

All drill core is logged, photographed, and cut in half with a diamond saw. Half
of the core is bagged and sent to Eastern Analytical or Accurassay Laboratories
for analyses while the other half is archived and stored on site for
verification and reference purposes. Gold is assayed by standard fire assay
methods with additional elements analyzed by Induced Coupled Plasma (ICP).
Samples with greater than 5 g/t gold and samples containing visible gold are
re-assayed using a metallic sieve procedure to reduce the nugget effect created
by free gold particles in the samples.


Duplicate samples, blanks, and certified standards are included with every
sample batch and then checked to ensure proper quality assurance and quality
control (QA/QC). Select samples are also sent to an outside laboratory for
independent analyses as part of a check assay procedure. 


Dr. Shane Ebert, P. Geo. is the Qualified Person responsible for the preparation
of this news release. Gary Giroux, P.Eng of Giroux Consultants Ltd has reviewed
the portion of this news release pertaining to the resource estimate.


Shane Ebert, President/Director

Except for the historical and present factual information contained herein, the
matters set forth in this news release, including words such as "expects",
"projects", "plans", "anticipates" and similar expressions, are forward-looking
information that represents management of Northern Abitibi's internal
projections, expectations or beliefs concerning, among other things, future
operating results and various components thereof or the economic performance of
Northern Abitibi. The projections, estimates and beliefs contained in such
forward-looking statements necessarily involve known and unknown risks and
uncertainties, which may cause Northern Abitibi's actual performance and
financial results in future periods to differ materially from any projections of
future performance or results expressed or implied by such forward-looking
statements. These risks and uncertainties include, among other things, those
described in Northern Abitibi's filings with the Canadian securities
authorities. Accordingly, holders of Northern Abitibi shares and potential
investors are cautioned that events or circumstances could cause results to
differ materially from those predicted. Northern Abitibi disclaims any
responsibility to update these forward-looking statements.

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