Golden Star Resources Comments on Recent Market Activity

Golden Star Resources Ltd. (NYSE MKT: GSS) (GSS) (GSC.TO) (GHANA:GSR) ("Golden Star" or the "Company") comments on recent market activity concerning the company's common share trading volumes and price. All references to "$" in this press release are to United States dollars.

On May 17, 2012 Golden Star announced that it had entered into certain definitive agreements to purchase an aggregate of $74.5 million of the principal outstanding under its 4.00% Convertible Senior Unsecured Debentures due November 30, 2012 (the "Original Debentures"), by way of privately negotiated transactions with certain holders of Original Debentures. Closing of the transaction is expected to occur on or about May 31, 2012, subject to receipt of regulatory and other customary closing conditions. After purchasing and cancelling $74.5 million of Original Debentures, an aggregate of $50.5 million principal amount of Original Debentures will remain outstanding.

VANCOUVER, British Columbia - May 23, 2012 (Investorideas.com Mining stocks Newswire) - Yale Resources Ltd. (TSX-V: YLL, OTCBB: YRLLF, and Frankfurt: YAB) is pleased to report additional gold and silver results from its ongoing comprehensive work program at the 290 square kilometre Urique Project, located in Chihuahua State, Mexico, immediately north of Goldcorp's El Sauzal gold mine and immediately south of Kimber Resources' Monterde Property. Work at Urique is being performed on behalf of optionee Mammoth Resources Ltd.

 A majority of the work in the southern portion of the Urique Project has been concentrated on the approximately four kilometre by four kilometre area immediately surrounding the town of Urique.

Colt Resources intersects 1.50g/t Au over 41.70m, including 4.48g/t Au over 8.05m at its Boa Fé Gold Project, Southern Portugal

Colt Resources Inc. ("Colt" or the "Company") (TSXV: GTP) (FRA: P01) (OTCQX: COLTF) is pleased to announce that it has received final analytical results corresponding to six recently completed drillholes from the ongoing drilling and trenching campaign on its Boa Fé gold project, located within the Company's 100% owned (47Km2) Boa Fé Experimental Mining License (EML) in southern Portugal. The Boa Fé EML is completely surrounded by the Company's 100% owned (732Km2) Montemor exploration concession.

VANCOUVER - May 21, 2012 (Investorideas.com Mining stocks Newswire) - Gold Bullion Development Corp. (TSXV: GBB, OTC PINK: GBBFF) (the "Company" or "Gold Bullion") is pleased to provide an independent NI 43-101 Technical Report. prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101"), on its Granada Gold Property, located along the prolific Cadillac trend in North-western Quebec , 5 km south of the city of Rouyn-Noranda.

 The Technical Report, entitled "Granada Gold Project Resource Estimate, Rouyn-Noranda, Abitibi, QC", dated May 17, 2012 with an effective date of April 2, 2012 , was prepared by SGS Canada Inc. and authored by Claude Duplessis , P.Eng., and Gilbert Rousseau , P.Eng., Qualified Persons as defined by NI 43-101 and Karina Sarabia , GIT and Jonathan Gagné, P.Eng..