The remnants of First Mariner Bancorp won bankruptcy court approval of a liquidation plan that promises to pay investors in bank-holding company's debt about 21 cents on the dollar, Dow Jones Daily Bankruptcy Review reported today. Bankruptcy Judge David E. Rice yesterday signed off on the liquidation plan for Capital Trust Holdings, the name for what's left of the company following the sale of its stake in the 1st Mariner bank chain. The debt investors had purchased about $63 million in trust-preferred securities from First Mariner.