Mainstream Files Lawsuit Against Champagne Resources

Mainstream Minerals Corporation (TSX VENTURE:MJO) ("Mainstream" or the
"Company") announces that it has received notice from Champagne Resources
Limited ("Champagne") that Champagne has terminated the amalgamation agreement
(the "Amalgamation Agreement") dated March 12, 2014, between Mainstream,
Champagne and a wholly-owned subsidiary of Mainstream pursuant to which
Mainstream intended to acquire all of the issued and outstanding shares of
Champagne.


Mainstream has filed a lawsuit in the Ontario Superior Court of Justice against
Champagne and its directors alleging that Champagne and its directors are in
breach of the terms of the Amalgamation Agreement. Mainstream is, among other
things, seeking specific performance under the Amalgamation Agreement.


Neither the TSXV nor its Regulation Services Provider (as that term is defined
in the policies of the TSXV) accepts responsibility for the adequacy or accuracy
of this release and has in no way passed upon the merits of the Transaction and
has neither approved nor disapproved of the contents of this press release.


This news release may contain forward-looking statements including but not
limited to comments regarding the timing and content of upcoming work programs,
geological interpretations, receipt of property titles, potential mineral
recovery processes, etc. Forward-looking statements address future events and
conditions and therefore, involve inherent risks and uncertainties. Actual
results may differ materially from those currently anticipated in such
statements.


FOR FURTHER INFORMATION PLEASE CONTACT: 
Mainstream Minerals Corporation
David Reid
President & Chief Executive Officer
705.254.8303
[e-mail]