Platinex Inc. (TSX VENTURE:PTX), is pleased to report work has completed and
highlights of this year's exploration program in Shining Tree, Ontario. The
Company has remained active throughout the year carrying out a property wide
program of till and bedrock sampling, plus focused programs of stripping,
channel sampling, ground magnetometer surveys, and drilling (tabulated below).
Currently, an internal resource estimate on the Herrick deposit is being carried
out. The till sampling program this year has continued to outline a very large,
impressive gold dispersion train. It has enabled identification of some of the
approximate source locations of the high gold in till content found on the
property. Further, critical data is to be received in December on high priority
areas. A comparative evaluation is being conducted to compare the till
dispersion on the Shining Tree property with those of the Timmins and Matachewan
gold camps. These results will be released upon completion.


James R. Trusler, President and CEO of Platinex Inc. states, "The exploration
progress and results on the property have been excellent to date. We will be
conducting an IP survey on the property in the near term and drilling high
potential gold targets early in the New Year."


A ten hole 1,721m program of diamond drilling on the Caswell and Herrick
prospects in March and April returned best results of 18.75g/t Au over 0.50m and
12.55g/t Au over 0.85m (See Platinex releases May 19 & 23, 2011). A 70km,
tightly spaced, magnetometer survey was completed over Michiwakenda Lake east of
the drilling on Herrick. This survey in conjunction with XDS Ortho anomalies and
anomalous till samples has revealed evidence of an untested structure, parallel
to or part of the Herrick prospect. Further till sample results in this area are
anticipated in December. The ongoing till sampling program across the property
collected 313 samples for gold grain counts by Overburden Drilling Management
(ODM) in Nepean, Ontario, of which 165 have been reported and 148 remain
outstanding. To date this year, 70 till samples have returned total counts of 10
or more gold grains, 23 contained 25 or more gold grains and 4 with counts
greater than 50 gold grains. Heavy metal concentrates of the till processed by
ODM returned visual estimates from gold grains identified of up to 64g/t Au.
(See Platinex release July 18, 2011). A mini excavator was used to collect 65%
of the basal till samples. Assaying of the fine fraction of the till (See
Platinex release Oct. 18, 2011) aided in the identification of an additional 6
gold in till dispersion targets. (See Platinex release Oct. 27, 2011). A total
of 424 bedrock samples have been collected and logged with 263 being assayed to
date. In November Platinex reported 29g/t Au by gravimetric analysis (FAG303) in
a composite grab sample taken over a 2m width. (See Platinex release Nov. 9,
2011). This discovery is a direct result of follow up minimal stripping from the
till prospecting program and warrants additional work. In addition to the above
work, some 1825 sq m of stripping was carried out and 84 channel samples were
collected for a best value of 5.23g/t Au/0.80m. Work on the Gold Corona joint
venture by Platinex will be reported separately.




             SUMMARY 2011 EXPLORATION ON SHINING TREE PROPERTY             
                                                                           
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Output         Number                                                      
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Till Sampling  313 samples collected; 165 processed by ODM; 4 greater than 
               50 grains; 23 greater than or equal to 25 grains; 70 greater
               than or equal to 10 grains; best visual assay of heavy metal
               concentrate 64.4g/t Au; 174 till fine samples processed at  
               SGS resulting in six gold train targets                     
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Drilling       Herrick - 3 holes for 651 m best value 18.75 g/t Au /0.5m   
               Caswell - 7 holes for 1,070 m best value 12.55 g/t Au /0.85m
               Total of 10 holes for 1,721m                                
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Stripping      3 areas for 1,825 m2                                        
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Channel        3 areas for 56.24m and 84 samples from 44 channels for best 
Sampling       value of 5.23 g/t Au /0.80m                                 
---------------------------------------------------------------------------
Grab Samples   424 collected and 263 assayed to date with the best assay of
               29 g/t Au being a composite grab sample taken over a 2m     
               width.                                                      
---------------------------------------------------------------------------
Ground         70 km                                                       
Magnetometer                                                               
Survey                                                                     
---------------------------------------------------------------------------



Till and bedrock samples have been collected and processed for assay under the
supervision of Scott Franko, P.Geo who is considered the qualified person for
the purpose of this release. Assays of bedrock chip samples and sieved till
samples were completed by SGS Laboratories in Don Mills, Ontario or by ALS
Minerals in Vancouver, BC by Fire Assay (FAI313 or FAA313). Assays over 10g/t Au
were retested by gravimetric analysis. (FAG303) Till samples submitted for gold
grain counts are sent to Overburden Drilling Management in Nepean. A heavy metal
concentrate is produced by ODM for each sample and the gold grains are
characterized as rounded, modified and pristine and counted under a microscope.


About Platinex Inc.

Platinex has recently revealed strong evidence of a major gold bearing zone on
its Shining Tree property as evidenced by an extraordinarily high gold content
of soil samples along a nine km long corridor. Platinex is expanding exploration
on the Herrick gold deposit with 66 holes drilled to date returning encouraging
gold values. Platinex's management team are leaders in the exploration and
development of Platinum Group Elements (PGE's) in North America. Shares of
Platinex are listed for trading on the TSX Venture Exchange under the symbol
"PTX".


To receive Company press releases, please email lparadis@platinex.com and
mention "Platinex press release" on the subject line.


FORWARD-LOOKING STATEMENTS:

Except for statements of historical fact, all statements in this news release -
including, without limitation, statements regarding future plans and objectives,
are forward-looking statements that involve various risks and uncertainties.
There can be no assurance that such statements will prove to be accurate; actual
results and future events could differ materially from those anticipated in such
statements.