SLATS LOCKED ECAM MSG RESULTS IN EMERGENCY DECLARATION AND SAFE LANDING FOR A319 FLT CREW.

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WE WERE INSTRUCTED TO SLOW TO 210 KTS FOR THE INITIAL DSCNT INTO ZZZ. AS WE DSNDED TO 11000 FT; I ELECTED TO BEGIN CONFIGURING. AS SOON AS F1 WAS SELECTED THE 'SLATS LOCKED' MESSAGE APPEARED UNDER THE FLAP INDICATOR; ALONG WITH THE ASSOCIATED ECAM. THE SLATS INDICATOR WAS OUT; BUT 'ORANGE;' CONFIRMING THE MESSAGE. WE PROGRESSED WITH THE ECAM ADVISING APCH WE WOULD NEED TIME; AND ATC VECTORED THE ACFT WITHIN THE APCH AREA. THE ECAM PROGRESSED AND WE WERE ABLE TO SELECT THE FLAPS TO THE DIRECTED F3 CONFIGN YIELDING A FINAL CONFIGN OF NO SLATS/F3; FOR LNDG. THE LNDG DISTANCE WAS COMPUTED TO BE APPROX 6600 FT WITH THE CORRECTION OF +25K. AFTER THE ECAM WAS COMPLETED AND DISPATCH CONCURRENCE; WE COMMENCED THE APCH. THE PURSER WAS ADVISED OF OUR SITUATION AND I REQUESTED SHE COMPLETE THE CABIN ADVISORY PROCS. WE DECLARED AN EMER WITH ATC WITH APPROX 1 HR FUEL REMAINING DUE TO THE HIGH FINAL APCH SPD; WET RWY; AND APPROX ONLY 7500 FT OF AVAILABLE RWY. APCH AND SUBSEQUENT LNDG WERE UNEVENTFUL TO THE ILS XX WITH MEDIUM AUTOBRAKES SELECTED. NO FURTHER PROBS WERE APPARENT AFTER LNDG; SO THE ACFT WAS TAXIED TO THE GATE. THE FIRE DEPT; OUR FLT ATTENDANTS AND 2 MAINT PERSONNEL WERE DEBRIEFED COMPLETELY ON THE INCIDENT WITH NO FURTHER QUESTIONS FROM ANY PARTY.