Golden Star Files Updated NI 43-101 Technical Report for Its Mineral Reserves and Resources Estimates at Wassa as at December 31, 2012, and Announces Annual General and Special Meeting Date

03.21.2013

TORONTO -- (MARKETWIRE) -- 03/21/13 -- Golden Star Resources Ltd. (NYSE MKT: GSS) (TSX: GSC) (GHANA: GSR) ("Golden Star" or the "Company") is pleased to announce that it has filed a National Instrument 43-101 ("NI 43-101") compliant technical report for the Wassa Gold Mine, Ghana that culminated from the Company updating its Proven and Probable Mineral Reserves (collectively "Mineral Reserves") and Mineral Resources estimates as at December 31, 2012. The Company increased its Mineral Reserves at Wassa by 85% to 1.47 million ounces of contained gold, relative to December 31, 2011. The Mineral Reserves and Resources estimates were announced in a press release dated February 5, 2013. This technical report can be accessed under the Company's SEDAR and EDGAR filings (see Form 8-K to be filed March 22, 2013) and on the Company's website at www.gsr.com.

The technical report, entitled "NI 43-101 Technical Report on Mineral Resources and Mineral Reserves Golden Star Resources Ltd, Wassa Gold Mine, Ghana Effective Date 31st December 2012" and dated March 1, 2013, was prepared by SRK Consulting (UK) Limited under the supervision of Dr. Lucy Roberts , Senior Consultant, Resource Geology, a Qualified Person pursuant to NI 43-101.

Annual General and Special Meeting

Golden Star's Annual General and Special Meeting will be held in Toronto at Fasken Martineau, 333 Bay Street, Suite 2400 in the Escarpment /Huron Boardrooms on Thursday, May 9, 2013, at 2 pm ET.

Company Profile

Golden Star 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. In addition, Golden Star has an 81% interest in the currently inactive 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.

For further information, please contact:

GOLDEN STAR RESOURCES LTD.
Bruce Higson-Smith
Senior Vice President Corporate Strategy
1-800-553-8436

INVESTOR RELATIONS
Belinda Labatte
The Capital Lab, Inc.
647-427-0208

Jay Pfeiffer
Pfeiffer High Investor Relations, Inc.
303-393-7044

Please note that you are now entering a website directly or indirectly maintained by a third party (the "External Site") and that you do so at your own risk.

Neither Golden Star Resources Ltd. nor its affiliates, subsidiaries, officers, directors or agents (collectively, “Golden Star” or the “Company”) have any control over (a) the External Site or any linked websites accessible through any External Site, or (b) any data or other content contained, or accessible, therein or in or through any such linked websites. The link to the External Site is provided for convenience purposes only. The information and other content on the External Site is not meant to modify, qualify, supplement or amend information disclosed by or on behalf of the Company under corporate, securities or other legislation in any jurisdiction, and should not be used to make investment decisions involving the Company’s securities.

By clicking “Accept” below you acknowledge and agree that neither Golden Star nor the third party provider of the External Site, Virtua Research, Inc. (“Virtua”), is responsible, or accepts or assumes any responsibility or liability whatsoever for, the content, the data contained in or accessible on or through, or the technical operation of the External Site. Golden Star and Virtua are not liable to you for, and take no responsibility for, third party pricing data provided for informational purposes and certain ratio results formulated from the provided third party pricing data. Further, by entering the External Site, you also acknowledge and agree that you completely and irrevocably forever waive, and release Golden Star from, any and all rights and claims against Golden Star and Virtua and further acknowledge and agree that in no event shall Golden Star or Virtua, its officers, employees, directors and agents be liable for any (i) direct or indirect, consequential, incidental, special, compensatory, punitive or other damages, (ii) damages for loss of income, loss of business profits, business interruption, loss of data or business information, loss of or damage to property, (iii) claims of third parties, or (iv) other pecuniary loss, arising out of or related to this disclaimer or the External Site or any linked websites.

By entering the External Site, you further acknowledge and agree that the disclaimer of warranties and limitations of liability set out in this disclaimer shall apply regardless of the causes, circumstances or form of action giving rise to the loss, damage, claim or liability, even if such loss, damage, claim or liability is based upon breach of contract (including, without limitation, a claim of fundamental breach or breach of a fundamental term), tort (including, without limitation, negligence), strict liability or any other legal or equitable theory, and even if Golden Star and Virtua are advised of the possibility of the loss, damage, claim or liability. The waiver and release specifically includes, without limitation, any and all rights and claims pertaining to the processing of personal data, including but not limited to any rights under any applicable data protection statute(s).

If in any jurisdiction, any part of this disclaimer is determined to be unenforceable by a court of competent jurisdiction, such part of this disclaimer shall be restricted or eliminated to the minimum extent necessary to comply with such determination and the remaining disclaimer shall otherwise remain in full force and effect.

Please note the information presented is given as at the date and the time of its original release. Changes in such historical information may occur due to adjustments in accounting and reporting standards & procedures.

Non-GAAP Information

Golden Star also uses certain non-International Financial Reporting Standards (“IFRS”) financial measures as defined in applicable Canadian and United States securities laws ("non-GAAP measures"), including the terms “cash operating cost per ounce”, “all-in sustaining costs”, “cash generated from operations before working capital changes”, “adjusted net (loss)/income attributable to Golden Star shareholders and “adjusted net (loss)/income per share attributable to Golden Star shareholders”. Golden Star believes that these measures are similar to the measures of other gold mining companies, but may not be comparable to similarly titled measures in every instance. In addition, changes in numerous factors including, but not limited to, Golden Star’s share price, risk free interest rates, gold prices, mining rates, milling rates, ore grade, gold recovery, costs of labor, consumables and mine site general and administrative activities can cause these measures to increase or decrease.

Golden Star believes these measures are useful non-GAAP operating measures and supplement the IFRS disclosures made by the Company. These non-GAAP measures are not representative of all of Golden Star's cash expenditures and there are material limitations associated with the use of such non-GAAP measures. Since these non-GAAP measures do not incorporate all non-cash expense and income items, changes in working capital and non-operating cash costs, they are not necessarily indicative of operating profit or cash flow from operations as determined under IFRS.

The non-GAAP information is not prepared in accordance with IFRS and may not be comparable to non-GAAP information used by other companies. The non-GAAP information should not be viewed in isolation or as a substitute for, or superior to, other data prepared in accordance with IFRS. For an explanation of the Non-GAAP financial measures used by the Company, please refer to the heading “Non-GAAP Financial Measures” in the Company’s Management Discussion and Analysis of Financial Condition and Results of Operations for the Three Months ended March 31, 2014 and the Company’s Management Discussion and Analysis of Financial Condition and Results of Operations for the Year Ended December 31, 2013, available at www.sedar.com.

© Golden Star | All Rights Reserved