Drilling at Wassa Mine Yields Further Encouraging Results That

Drilling at Wassa Mine Yields Further Encouraging Results That
Support Decision to Increase Rate of Drilling 
DENVER, CO -- (Marketwire) -- 01/16/13 --  Golden Star Resources Ltd.

--  BSDD 181 - 75.6m (meters) grading 10.6g/t (grams per tonne) gold
    including 22.1m grading 29.8g/t
--  BSDD 200 - 25.5m grading 15.4g/t
--  BSDD 197 - 39.9m grading 9.8g/t
--  BSDD 186 - 26.6m grading 6.4g/t
--  BSDD 198 - 17.3m grading 7.2g/t

Golden Star Resources Ltd. (NYSE MKT: GSS) (TSX: GSC) (GHANA: GSR)
("Golden Star" or the "Company") today provided an update on
exploration activities at its Wassa mine in Ghana. Full drill
results, plans and sections are available at the Company's website at
www.gsr.com or by clicking the following link:
Drilling at Wassa Main continues to successfully delineate and extend
high grade mineralization intersected earlier in 2012. Due to the
success of these drilling programs, an additional drill rig was added
to the Wassa drilling fleet at the end of 2012, bringing the total to
six rigs. Results continue to delineate the geometry of these
deposits, which show good continuity along the apparent fold plunge
direction. The Company completed an additional 69 drill holes for
26,844m in the fourth quarter, bringing the 2012 full year total to
175 holes for 58,670m.  
Drilling of the high grade intersections at B Shoot has extended the
previous known mineralization as well as delineated other shoots.
BSDD181, located on section 19825N, intersected a new high grade
shoot of mineralization with an estimated true width of 75.6m grading
10.6g/t, including 22.1m grading 29.8g/t from 384m depth. This
mineralization appears to be related to a fold closure that is
different from the high grade zones the Company intersected with
earlier drilling programs. Importantly, this hole extends the known
mineralization beneath the $1500 gold price pit shell that has been
used to guide and target this drill program. Additional drilling of
the zone intersected by BSDD181 has been prioritized to enable the
Company to better understand the controls and extents of this new
high grade zone. 
Three new holes testing the B Shoot high grade fold hinge returned
significant results extending the strike and dip of the zone
intersected in hole BSDD137, located on section 19925N (54.3m grading
4.8g/t, including 27.5m at 8.8g/t, as disclosed in the Company's
Press Release 12-24 dated October 15 2012). New hole BSDD163B,
located approximately 20m up dip and 25m along strike from hole
BSDD137 and along section 19950N, intersected a true width of 18m
grading 6.0g/t. New hole BSDD200 drilled on the same section as
BSDD163B, 25m along strike and approximately 25m down dip of BSDD137,
intersected a true width of 25.5m grading 15.4g/t. New hole BSDD197,
which targeted the same high grade shoot on section 19975N and
located an additional 25m along strike from BSDD163B and BSDD200,
also intersected the core of the high grade shoot returning a true
width of 39.9m grading 9.8g/t.  
The B Shoot high grade zone of mineralization has now been defined
over 200m strike length in ten diamond core drill holes. The table
below shows the drill intercepts that have been interpreted to be
associated with the high-grade structure running from 19800N to
20000N. This structure remains open in all directions and drilling is
continuing to further delineate the extent of the high-grade zone.  
Table 1: B Shoot High-Grade Intersections 

         Easting  North- Eleva- Azimuth Dip   From  To   Drilled  True  Gold
 Hole ID   (m)     ing    tion  (degs) (degs) (m)  (m)    Width  Width Grade
                   (m)    (m)                              (m)    (m)   g/t 
BSDD152A  39895   20000   993     90    -60  265.3 290.0   24.7   24.3  14.2
 BSDD197  39751   19975  1022     90    -55  393.5 433.6   40.1   39.9  9.8 
BSDD163B  39713   19950  1036     90    -52  434.5 452.5   18.0   18.0  6.0 
 BSDD200  39632   19950  1047     90    -50  482.5 508.0   25.5   25.5  15.4
 BSDD137  39769   19925  1030     90    -56  373.0 445.0   72.0   54.3  4.8 
 BSDD113  39792   19900  1031     90    -61  372.5 398.5   26.0   18.1  32.0
 BSDD090  39809   19875  1030     90    -58  368.3 397.3   29.0   21.2  15.8
 BSDD131  39756   19850  1032     90    -64  446.0 468.0   22.0   14.4  6.1 
BSDD135A  39760   19825  1033     93    -60  506.5 521.9   15.4   10.9  6.3 
 BSDD186  39701   19800  1044     90    -60  389.0 416.0   27.0   26.6  6.4 

The core of the B Shoot high-grade zone of mineralization has been
interpreted to be associated with a folded zone of mineralization
that plunges approximately 30 degrees to the southwest. The wider,
higher grades intersected in the above table are thought to be
located in the hinge of the fold structure. Although this high grade
mineralization continues to be the main focus of the drilling, the
Company also is drilling off the extents of the preliminary optimized
pit shells and continues to intersect zones of mineralization above
the current reserve grades. Significant intersections for the fourth
quarter of 2012 are summarized in the table below.  
Table 2: B Shoot Q4 2012 Significant Drill Intersections 

 Hole ID  Easting Northing  Elev   Az   Dip  From   To   Drilled   ~    Gold
            (m)      (m)    (m)  (degs)(degs) (m)   (m)   Width  True  Grade
                                                           (m)   Width  g/t 
BSDD155A   39808    19975   997    90   -51   25.0  42.0    17.0  13.8   4.2
BSDD163B   39713    19950   1036   90   -52  434.5 452.5    18.0  18.0   6.0
 BSDD181   39832    19825   1032   90   -56  337.0 413.0    76.0  75.6  10.6
            Including              90   -56  336.0 343.2     7.2   7.2   3.4
                                   90   -56  350.0 356.4     5.9   5.9  11.1
                                   90   -56  360.4 374.5    14.1  14.0   3.0
                                   90   -56  383.5 405.7    22.2  22.1  29.8
 BSDD182   39913    20249   970    90   -81  168.0 182.0    14.0   5.7  10.4
 BSDD186   39701    19800   1044   90   -60  389.0 416.0    27.0  26.6   6.4
 BSDD188   39968    20025   983    90   -53  103.5 131.4    27.9  22.0   3.5
 BSDD196   40238    20321   1001   90   -60  161.0 172.0    11.0   7.8  10.2
 BSDD197   39751    19975   1022   90   -55   70.0 117.0    47.0  36.0   2.1
 BSDD197   39751    19975   1022   90   -55  293.5 352.0    58.5  58.3   1.8
 BSDD197   39751    19975   1022   90   -55  393.5 433.6    40.1  39.9   9.8
 BSDD198   40004    19850   982    90   -59    7.0  31.0    24.0  17.3   7.2
 BSDD199   39984    20125   973    90   -52  200.0 212.0    12.0   9.6   5.9
 BSDD200   39632    19950   1047   90   -50  405.5 429.1    23.6  23.6   3.1
 BSDD200   39632    19950   1047   90   -50  482.5 508.0    25.5  25.5  15.4
 BSDD201   39893    20000   993    90   -70  290.0 313.0    23.0  21.6   4.8
 BSDD207   39977    20000   983    90   -54    1.0  28.0    27.0  21.0   2.6

The year-end resource and reserves estimates are currently being
updated for the Wassa Main pits using an interim model which utilized
new drill results up to August 2012 but did not include most of the
drilling that occurred during the second half of 2012. The Company
expects a substantial increase in the Wassa Main resources and
reserves for 2012 and ongoing drilling during 2013 should continue
this trend as more of the drilling program results are generated.  
Sam Coetzer, President and CEO, commented, "The continued drilling
success at Wassa Main has prompted the addition of another drill rig
to fully assess the potential of this growing deposit. This new
drilling strongly suggests that Wassa Main's overall average grade
should increase and contained gold should grow significantly from
where we are today. As the target area remains open in all directions
we will prioritize our drilling program to define the boundaries of
the Wassa resource so we can then focus on in-fill drilling to
improve our confidence and convert resources to a growing reserve
base. "  
Golden Star Resources holds the largest land package in one of the
world's largest and most prolific gold producing regions. The Company
holds a 90% equity interest in Golden Star (Bogoso/Prestea) Limited
and Golden Star (Wassa) Limited, which respectively own the
Bogoso/Prestea and Wassa/HBB open-pit gold mines in Ghana, West
Africa. In addition, Golden Star has an 81% interest in the Prestea
Underground mine in Ghana, as well as gold exploration interests
elsewhere in Ghana, in other parts of West Africa and in Brazil in
South America. Golden Star has approximately 259 million shares
outstanding. Additional information is available at www.gsr.com.  
Statements Regarding Forward-Looking Information: Some statements
contained in this news release are forward-looking statements within
the meaning of the Private Securities Litigation Reform Act of 1995
and other applicable securities laws. Such statements include: the
Company's expectations regarding its planned drilling and exploration
activities for 2013 and the timing thereof; the Company's ability to
evaluate expansion potential; the interpretation of drilling results;
expected increases in resources and reserves at Wassa Main for 2012;
and the impact of 2013 drilling on resources and reserves including
grade increases and contained gold growth. Investors are cautioned
that forward-looking statements are inherently uncertain and involve
risks and uncertainties. Factors that could cause actual results to
differ materially include timing of and unexpected events during
exploration; variations in ore grade; variations in relative amounts
of refractory, non-refractory and transition ores; technical or
permitting issues, and fluctuations in gold price and costs. There
can be no assurance that future developments affecting the Company
will be those anticipated by management. Please refer to the
discussion of these risks and other factors in the Company's Form
10-K for 2011 and subsequent Form 10-Qs for 2012 and other filings of
the Company with the United States Securities and Exchange Commission
and the applicable Canadian securities regulatory authorities. The
forecasts contained in this press release constitute management's
current estimates, as of the date of this press release, with respect
to the matters covered thereby. We expect that these estimates will
change as new information is received. While we may elect to update
these estimates at any time, we do not undertake to update any
estimate at any particular time or in response to any particular
 The technical contents of this press release have
been reviewed and approved by S. Mitchel Wasel, BSc Geology, a
Qualified Person pursuant to National Instrument 43-101. Mr. Wasel is
Vice President of Exploration for Golden Star and an active member
and Registered Chartered Professional of the Australasian Institute
of Mining and Metallurgy. 
The results for Wassa quoted herein are based on the analysis of
saw-split HQ/NQ diamond half core or a three kilogram single stage
riffle split of a nominal 25 to 30 kg Reverse Circulation chip sample
which has been sampled over nominal one meter intervals (adjusted
where necessary for mineralized structures). Sample preparation and
analyses have been carried out at SGS Laboratories in Tarkwa using a
1,000 gram slurry of sample and tap water which is prepared and
subjected to an accelerated cyanide leach (LEACHWELL). The sample is
then rolled for twelve hours before being allowed to settle. An
aliquot of solution is then taken, gold extracted into Di-iso Butyl
Keytone (DiBK), and determined by flame Atomic Absorption
Spectrophotometry (AAS). Detection Limit is 0.01ppm. 
All analytical work is subject to a systematic and rigorous Quality
Assurance-Quality Control (QA-QC). At least 5% of samples are
certified standards and the accuracy of the analysis is confirmed to
be acceptable from comparison of the recommended and actual
"standards" results. The remaining half core is stored on site for
future inspection and detailed logging, to provide valuable
information on mineralogy, structure, alteration patterns and the
controls on gold mineralization. 
Additional information on earlier drilling results at Wassa are
available in the Company's February 7, 2012, May 2, 2012 and October
15, 2012 press releases.  
For further information, please contact: 
Bruce Higson-Smith
Senior Vice President Corporate Strategy
Jay Pfeiffer
Pfeiffer High Investor Relations, Inc. 
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