March 1 (Reuters) - Sabina Gold & Silver Corp SBB.TO :
* SABINA GOLD & SILVER CORP. FILES PRELIMINARY BASE SHELFPROSPECTUS
* SABINA GOLD & SILVER - WHEN FINAL, SHELF PROSPECTUS WILLLET COMAKE OFFERINGS OF UP TO $500 MILLION OF ANY COMBINATION OFSHARES, DEBT SECURITIES, OTHERS