MONTREAL, QUEBEC and TORONTO, ONTARIO — (Marketwire) — 12/28/12 — Osisko Mining Corporation ("Osisko") (TSX: OSK)(FRANKFURT: EWX) and Queenston Mining Inc. ("Queenston") (TSX: QMI)(FRANKFURT: QMI)(OTCQX: QNMNF) are pleased to announce the successful completion of the previously announced plan of arrangement (the "Arrangement") involving Queenston and Osisko whereby, among other things, Osisko has acquired all of the issued and outstanding common shares of Queen